© 2008 Microchip Technology Inc. DS21832E-page 1
25AA010A/25LC010A
Device Selection Table
Features:
• 10 MHz max. Clock Frequency
• Low-Power CMOS Technology:
- Max. Write Current: 5 mA at 5.5V, 10 MHz
- Read Current: 5 mA at 5.5V, 10 MHz
- Standby Current: 5 μA at 5.5V
• 128 x 8-bit Organization
• Write Page mode (up to 16 bytes)
• Seque nti al Read
• Self-Timed Erase and Write Cycles (5 ms max.)
• Block Write Protection:
- Protect none, 1/4, 1/2 or all of array
• Built-In Write Protection:
- Power-on/off data protection circuitry
- Write enable latch
- Write-protect pin
• High Reliability:
- Endurance : 1,000,000 Erase/Write cy cles
- Data retention: > 200 years
- ESD protection: > 4000V
• Temperature Ranges Supported:
• Pb-Free and RoHS Compliant
Pin Function Table
Description:
The Microchip Technology Inc. 25XX010A* is a 1 Kbit
Serial Electrically Erasable Programmable Read-Only
Memory (EEPROM). The memory is accessed via a
simple Serial Peripheral Interface (SPI) compatible
serial bus. The bus signals required are a clock input
(SCK) plus separate data in (SI) and data out (SO)
lines. Ac cess to the dev ice is contro lled th rough a C hip
Select (CS) input.
Communication to the device can be paused via the
hold pin (HOLD). While the device is paused,
transitions on its inputs will be ignored, with the
exception of Chip Select, allowing the host to service
higher priority interrupts.
The 25XX010A is available in standard packages
including 8-lead PDIP and SOIC, and advanced
packages including 8-lead MSOP, 8-lead TSSOP and
rotated TSSOP, 8-lead 2x3 DFN, and 6-lead SOT-23.
Package Types (not to scale)
Part Number VCC Range Page Size Temp. Ranges Packages
25AA010A 1.8-5.5V 16 Bytes I P, MS, SN, ST, MC, OT
25LC010A 2.5-5.5V 16 Bytes I, E P, MS, SN, ST, MC, OT
- Industrial (I): -40°Cto +85°C
- Automotive (E): -40°Cto+125°C
Name Function
CS Chip Select Input
SO Serial Data Outpu t
WP Write-Protect
VSS Ground
SI Serial Dat a Input
SCK Serial Cloc k Inpu t
HOLD Hold Input
VCC Supply Voltage
CS
SO
WP
V
SS
1
2
3
4
8
7
6
5
V
CC
HOLD
SCK
SI
(P, SN)
V
SS
1
2
34
6
5
V
DD
CS
SO
(OT)
PDIP/SOIC
X-Rotated TSSOP
HOLD
V
CC
CS
SO
1
2
3
4
8
7
6
5
SCK
SI
V
SS
WP
(X/ST)
CS
SO
WP
V
SS
1
2
3
4
8
7
6
5
V
CC
HOLD
SCK
SI
CS
SO
WP
V
SS
1
2
3
4
8
7
6
5
V
CC
HOLD
SCK
SI
(ST, M S)
TSSOP/MSOP
SOT-23
SCK
SI
CS
SO
WP
V
SS
1
2
3
4
8
7
6
5
V
CC
HOLD
SCK
SI
(MC)
DFN
1K SPI Bus Serial EEPROM
*25XX01 0A is used in th is do cum en t as a gen er i c part nu mb er for the
25AA010A and the 25LC010A.
25AA010A/25LC010A
DS21832E-page 2 © 2008 Microchip Technology Inc.
1.0 ELECTRICAL CHARAC TERISTICS
Absolute Maximum Ratings(†)
VCC.............................................................................................................................................................................6.5V
All inputs and outputs w.r.t. VSS ......................................................................................................... -0.6V to VCC +1.0V
Storage temperature .................................................................................................................................-65°C to 150°C
Ambient temperature under bias...............................................................................................................-40°C to 125°C
ESD protection on all pins..........................................................................................................................................4 kV
TABLE 1-1: DC CHARACTERISTICS
† NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device . This i s a stres s ratin g only and functio nal operati on of the devic e at thos e or any other co nditio ns abov e thos e
indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for an
extended period of time may affect device reliability.
DC CHARACTERISTICS Industrial (I): TA = -40°C to +85°C VCC = 1.8V to 5.5V
Automotive (E): TA = -40°C to +125°C VCC = 2.5V to 5.5V
Param.
No. Sym. Characteristic Min. Max. Units Test Conditions
D001 VIH1High-level input
voltage 0.7 VCC VCC+1 V
D002 VIL1Low-level input
voltage -0.3 0.3 VCC VVCC ≥ 2.7V (Note)
D003 VIL2-0.3 0.2 VCC VVCC < 2.7V (Note)
D004 VOL Low-level output
voltage —0.4VIOL = 2.1 mA
D005 VOL —0.2VIOL = 1.0 mA, VCC < 2.5V
D006 VOH High-level output
voltage VCC -0.5 — V IOH = -400 μA
D007 ILI Input leakage
current —±1μACS = VCC, VIN = VSS TO VCC
D008 ILO Output lea kage
current —±1μACS = VCC, VOUT = VSS TO VCC
D009 CINT Intern al ca p ac it a nc e
(all inputs and
outputs)
—7pFTA = 25°C, CLK = 1.0 MHz,
VCC = 5.0V (Note)
D010 ICC Read
Operati ng current
—
—
5
2.5
mA
mA
VCC = 5.5V; FCLK = 10.0 MHz;
SO = Open
VCC = 2.5V; FCLK = 5.0 MHz;
SO = Open
D011 ICC Wri te —
—5
3mA
mA VCC = 5.5V
VCC = 2.5V
D012 ICCS Standby current —
—
5
1
μA
μA
CS = VCC = 5.5V, Inputs tied to VCC or
VSS, TA = +125°C
CS = VCC = 2.5V, Inputs tied to VCC or
VSS, TA = +85°C
Note: This parameter is periodically sampled and not 100% tested.
© 2008 Microchip Technology Inc. DS21832E-page 3
25AA010A/25LC010A
TABLE 1-2: AC CHARACTERISTICS
AC CHARACTERISTICS Industrial (I): TA = -40°C to +85°C VCC = 1.8V to 5.5V
Automotive (E): TA = -40°C to +125°C VCC = 2.5V to 5.5V
Param.
No. Sym. Characteristic Min. Max. Units Test Conditions
1F
CLK Clock frequency —
—
—
10
5
3
MHz
MHz
MHz
4.5V ≤ VCC < 5.5V
2.5V ≤ VCC < 4.5V
1.8V ≤ VCC < 2.5V
2T
CSS CS setup time 50
100
150
—
—
—
ns
ns
ns
4.5V ≤ VCC < 5.5V
2.5V ≤ VCC < 4.5V
1.8V ≤ VCC < 2.5V
3T
CSH CS hold time 100
200
250
—
—
—
ns
ns
ns
4.5V ≤ VCC < 5.5V
2.5V ≤ VCC < 4.5V
1.8V ≤ VCC < 2.5V
4T
CSD CS disable time 50 — ns —
5 Tsu Data setup time 10
20
30
—
—
—
ns
ns
ns
4.5V ≤ VCC < 5.5V
2.5V ≤ VCC < 4.5V
1.8V ≤ VCC < 2.5V
6T
HD Data hold time 20
40
50
—
—
—
ns
ns
ns
4.5V ≤ VCC < 5.5V
2.5V ≤ VCC < 4.5V
1.8V ≤ VCC < 2.5V
7T
RCLK rise time — 100 ns (Note 1)
8T
FCLK fall time — 100 ns (Note 1)
9T
HI Clock high time 0.05
0.1
0.15
1000
1000
1000
μs
μs
μs
4.5V ≤ VCC < 5.5V
2.5V ≤ VCC < 4.5V
1.8V ≤ VCC < 2.5V
10 TLO Clock low time 0.05
0.1
0.15
1000
1000
1000
μs
μs
μs
4.5V ≤ VCC < 5.5V
2.5V ≤ VCC < 4.5V
1.8V ≤ VCC < 2.5V
11 TCLD Clock delay time 50 — ns —
12 TCLE Clock enable time 50 — ns —
13 TVOutput valid from clock
low —
—
—
50
100
160
ns
ns
ns
4.5V ≤ VCC < 5.5V
2.5V ≤ VCC < 4.5V
1.8V ≤ VCC < 2.5V
14 THO Output hold time 0 — ns (Note 1)
15 TDIS Output disable time —
—
—
40
80
160
ns
ns
ns
4.5V ≤ VCC < 5.5V (Note 1)
2.5V ≤ VCC < 4.5V (Note 1)
1.8V ≤ VCC < 2.5V (Note 1)
16 THS HOLD setup time 20
40
80
—
—
—
ns
ns
ns
4.5V ≤ VCC < 5.5V
2.5V ≤ VCC < 4.5V
1.8V ≤ VCC < 2.5V
Note 1: This parameter is periodically sampled and not 100% tested.
2: This parameter is not tested but ensured by characterization. For endurance estimates in a specific
application, please consult the Total Endurance™ Model which can be obtained from our web site:
www.microchip.com.
3: TWC begins on the rising edge of CS after a v ali d w ri t e se qu enc e a n d en ds wh en t he i n t er nal w ri t e c yc le
is complete .
25AA010A/25LC010A
DS21832E-page 4 © 2008 Microchip Technology Inc.
TABLE 1-3: AC TEST CONDITIONS
17 THH HOLD hold time 20
40
80
—
—
—
ns
ns
ns
4.5V ≤ VCC < 5.5V
2.5V ≤ VCC < 4.5V
1.8V ≤ VCC < 2.5V
18 THZ HOLD low to output
high-Z 30
60
160
—
—
—
ns
ns
ns
4.5V ≤ VCC < 5.5V (Note 1)
2.5V ≤ VCC < 4.5V (Note 1)
1.8V ≤ VCC < 2.5V (Note 1)
19 THV HOLD high to output valid 30
60
160
—
—
—
ns
ns
ns
4.5V ≤ VCC < 5.5V
2.5V ≤ VCC < 4.5V
1.8V ≤ VCC < 2.5V
20 TWC Internal write cycle time
(byte or page ) —5ms(NOTE 3)
21 — Endurance 1M — E/W
Cycles (NOTE 2)
TABLE 1-2: AC CHARACTERISTICS (CONTINUED)
AC CHARACTERISTICS Industrial (I): TA = -40°C to +85°C VCC = 1.8V to 5.5V
Automotive (E): TA = -40°C to +125°C VCC = 2.5V to 5.5 V
Param.
No. Sym. Characteristic Min. Max. Units Test Conditions
Note 1: This parameter is periodically sampled and not 100% tested.
2: This parameter is not tested but ensured by characterization. For endurance estimates in a specific
application, please consult the Total Endurance™ Model which can be obtained from our web site:
www.microchip.com.
3: TWC begins on the rising edge of CS after a v ali d w ri t e se qu enc e a n d en ds wh en t he i n t er nal w ri t e c yc le
is complete .
AC Waveform:
VLO = 0.2V —
VHI = VCC - 0.2V (Note 1)
VHI = 4.0V (Note 2)
CL = 100 pF —
Timing Measurement Refere nce Lev el
Input 0.5 VCC
Output 0.5 VCC
Note 1: For VCC ≤ 4.0V
2: For VCC > 4.0V
© 2008 Microchip Technology Inc. DS21832E-page 5
25AA010A/25LC010A
FIGURE 1-1: HOLD TIMING
FIGURE 1-2: SERIAL INPUT TIMING
FIGURE 1-3: SERIAL OUTPUT TIMING
CS
SCK
SO
SI
HOLD
17
16 16 17
19
18
Don’t Care 5
High-Impedance
n + 2 n + 1 n n - 1
n
n + 2 n + 1 n nn - 1
CS
SCK
SI
SO
65
8
711
3
LSB in
MSB in
High-Impedance
12
Mode 1,1
Mode 0,0
2
4
CS
SCK
SO
10
9
13
MSB out ISB out
3
15
Don’t Care
SI
Mode 1,1
Mode 0,0
14
25AA010A/25LC010A
DS21832E-page 6 © 2008 Microchip Technology Inc.
2.0 FUNCTIONAL DESCRIPTION
2.1 Principles of Operation
The 25XX010A is a 128 byte Serial EEPROM designed
to interface directly with the Serial Peripheral Interface
(SPI) port of many of today’s popular microcontroller
families, i ncluding M ic r oc hi p’s PIC ® m ic roc on trol lers . It
may also interface with microcontrollers that do not
have a built-in SPI port by using discrete I/O lines
programmed properly in firmware to match the SPI
protocol.
The 25XX010A contains an 8-bit instruction register.
The d evic e is acce sse d via the SI pin, w ith data bei ng
clocked in on the ris ing edg e of SCK. Th e C S pin mus t
be low and the HOLD pin must be high for the entire
operation.
Table 2-1 contains a list of the possible instruction
bytes and format for device operation. All instructions,
addresses, and data are transferred MSb first , LSb last.
Data (SI) is sampled on the first rising edge of SCK
after CS goes lo w. If the cloc k li ne is sha red wit h ot her
periphera l devi ces on the SPI bus, the user can assert
the HOLD input and place the 25XX010A in ‘HOLD’
mode. After releasing the HOLD pin, operation will
resume from the point when the HOLD was asserted.
2.2 Read Sequence
The device is selected by pulling CS low. The 8-bit
READ instruction is transmitted to the 25XX010A
followed by an 8-bit address. See Figure 2-1 for more
details.
After the correct READ in struction and ad dress are sent,
the data stored in the memory at the selected address
is shi fted out on the SO pin . Dat a st ored in the me mo ry
at the next address can be read sequentially by
continuing to provide clock pulses to the slave. The
internal Address Pointer automatically increments to
the next higher address after each byte of data is
shifted out. When the highest address is reached
(7Fh), the address counter rolls over to address 00h
allow ing the read cy cle to be cont inued indefin itely . Th e
read operation is terminated by raising the CS pin
(Figure 2-1).
2.3 Write Sequence
Prior to any atte mpt to write data to the 25XX010A, the
write enable latch must be set by issuing the WREN
instruction (Figure 2-4). This is done by setting CS low
and then clocking out the proper instruction into the
25XX010A. After all eight bits of the instruction are
transmitted, CS must be driven high to set the write
enable latch. If the write operation is initiated immedi-
ately after th e WREN i nst ruct io n with out CS driv en hig h,
data will not be written to the array since the write
enable latc h wa s not prop erl y set.
After setting the write enable latch, the user may
proce ed by drivin g CS low, issuing a WRITE instruction,
follow ed by th e re ma inder of the ad dres s, and then th e
dat a to be writ ten. Up to 16 bytes of data can be s ent to
the device before a write cycle is necessary. The only
restriction is that all of the bytes must reside in the
same page. Additionally, a page address begins with
XXXX 0000 and ends with XXXX 1111. If the internal
address counter re aches XXXX 1111 and clock sign als
continue to be appli ed to the chip , the ad dres s counter
will roll back to the first address of the page and over-
write any data that previously existed in those
locations.
For the data to be actually written to the array, the CS
must be brought high a fter the Leas t Significant bit (D0)
of t he nth dat a byte has been clocked in . If CS is driven
high at any other time, the write operation will not be
comple ted. Refer to Figure 2-2 and Figure 2-3 for more
detailed illustrations on the byte write sequence and
the page write sequence, respectively. While the write
is in progress, the STATUS register may be read to
check the status of the WIP, WEL, BP1 and BP0 bits
(Figure 2-6). Attempting to read a memory array
locatio n will not b e possible during a writ e cycle. Pol ling
the WIP bit in the STATUS register is recommended in
order to dete rmi ne if a write cy cl e is in pro gre ss . Whe n
the write cycle is completed, the write enable latch is
reset.
Note: Page write opera tions are l imited to wri ting
bytes within a single physical page,
regardless of the number of bytes
actually being written. Physical page
boundaries start at addresses that are
integer multiples of the page buffer size (or
‘pag e size’) an d, end at addresses tha t are
integer multiples of page size – 1. If a
Page Write command attempts to write
across a physical page boundary, the
result is that the data wraps around to the
beginning of the current page (overwriting
data previously stored there), instead of
being w ritte n to the next p a ge as mi ght be
expected. It is therefore necessary for the
application software to prevent page write
operations that would attempt to cross a
page boundary.
© 2008 Microchip Technology Inc. DS21832E-page 7
25AA010A/25LC010A
BLOCK DIAGRAM
FIGURE 2-1: READ SEQUENCE
SI
SO
SCK
CS
HOLD
WP
STATUS
Register
I/O Control Memory
Control
Logic
X
Dec
HV Generato r
EEPROM
Array
Page Latches
Y Decoder
Sense Amp.
R/W Control
Logic
VCC
VSS
TABLE 2-1: INSTRUCTION SET
Instruction Name Instruction Format Description
READ 0000 x011 Read data from memory array beginning at selected address
WRITE 0000 x010 Write data to memory array beginning at selected address
WRDI 0000 x100 Reset the write enable latch (disable write operations)
WREN 0000 x110 Set the write enable latch (enable write operations)
RDSR 0000 x101 Read STATUS register
WRSR 0000 x001 Write STATUS register
x = don’t care
SO
SI
SCK
CS
0 2345678910111
01000001 XA6A5A4A1A0
76543210
Data Out
High-Impedance
A3A2
Address Byte
12 13 14 15 16 17 18 19 20 21 22 23
Instruction
25AA010A/25LC010A
DS21832E-page 8 © 2008 Microchip Technology Inc.
FIGURE 2-2: BYTE WRITE SEQUENCE
X = don’t care
FIGURE 2-3: PAGE WRITE SEQUENCE
X = don’t care
SO
SI
CS
0 2345678910111
00000001 XA6A5A4A1
A3A2
Address Byte
12 13 14 15 16 17 18 19 20 21 22 23
Instruction Data Byte
A06
7543210
High-Impedance
Twc
SCK
SI
CS
91011
00000001 76543210
Data Byte 1
SCK 0 23456718
SI
CS
33 34 35 38 39
76543210
Data Byte n (16 max)
SCK 24 26 27 28 29 30 3125 32
76543210
Data Byte 3
76543210
Data Byte 2
36 37
Instruction Address Byte
XA6A5A4A3A1A0
A2
12 13 14 15 16 17 18 19 20 21 22 23
© 2008 Microchip Technology Inc. DS21832E-page 9
25AA010A/25LC010A
2.4 Write Enable (WREN) and W rite
Disable (WRDI)
The 25XX010A contains a write enable latch. See
Table 2-4 for the Write-Protect Functionality Matrix.
This latch must be set before any write operation will be
completed internally. The WREN instruction will set the
latch, and the WRDI will reset the latch.
The following is a list of conditions under which the
write enab le latc h wi ll be reset:
• Power-up
•WRDI instruction successfully executed
•WRSR instruction successfully executed
•WRITE instruction successfully executed
•WP
pin i s brought low
FIGURE 2-4: WRITE ENABLE SEQUENCE (WREN)
FIGURE 2-5: WRITE DISABLE SEQUENCE (WRDI)
SCK
0 2345671
SI
High-Impedance
SO
CS
010000 01
SCK
0 2345671
SI
High-Impedance
SO
CS
010000 0
0
25AA010A/25LC010A
DS21832E-page 10 © 2008 Microchip Technology Inc.
2.5 Read Status Register Instruction
(RDSR)
The Read Status Register instruction (RDSR) provi des
acce ss to t he S TATUS reg ist er. See F igu re 2 -6 fo r t he
RDSR timing sequence. The STATUS register may be
read at any time, even during a write cycle. The
STATUS register is formatted as follows:
TABLE 2-2: STATUS REGISTER
The Write-In-Process (WIP) bit indicates whether the
25XX 010A is bu sy wit h a w rit e ope rat ion. W hen set to
a ‘1’, a write is in progress, when set to a ‘0’, no write
is in progress. This bit is read-only.
The Write Enable Lat ch (WEL) bit indicat es the st atus
of th e wri te e nabl e lat ch an d is r ead -onl y. When set to
a ‘1’, the latch allows writes to the array, when set to a
‘0’, the latch prohibits writes to the array. The state of
this bit can always be updated via the WREN or WRDI
commands regardless of the state of write protection
on the STATUS register. These commands are shown
in Figure 2-4 and Figure 2-5.
The Block Protection (BP0 and BP1) bits indicate
which blocks are currently write-protected. These bits
are set by the user issuing the WRSR instruction, which
is shown in Figure 2-7. These bits are nonvolatile and
are described in more detail in Table 2-3.
FIGURE 2-6: READ STATUS REGISTER TIMING SEQUENCE (RDSR)
7 654 3 2 1 0
– –––W/RW/R R R
X XXXBP1 BP0 WEL WIP
W/R = writable/readable. R = read-only.
SO
SI
CS
9101112131415
11000000
7654 210
Instruction
Data from STATUS Register
High-Impedance
SCK
0 23456718
3
© 2008 Microchip Technology Inc. DS21832E-page 11
25AA010A/25LC010A
2.6 Write Status Register Instruction
(WRSR)
The W rite S t atus Register inst ruction (WRSR) allows the
user to write to the nonvolatile bits in the STATUS
register as shown in Table 2-2. See Figure 2-7 for the
WRSR timing s equence. Fo ur levels of protection fo r the
array are selec tab le by wr itin g to the appropr iate bi ts i n
the STATUS register. The user has the ability to write-
prote ct none, one , two or all four of the se gments of the
array as shown in Table 2-3.
TABLE 2-3: ARRAY PROTECTION
FIGURE 2-7: WRITE STATUS REGISTER TIMING SEQUENCE (WRSR)
BP1 BP0 Array Addresses
Write-Protected
00 none
01 upper 1/4
(60h-7Fh)
10 upper 1/2
(40h-7Fh)
11 all
(00h-7Fh)
SO
SI
CS
9101112131415
01000000
7654 210
Instruction Data to STATUS Registe r
High-Impedance
SCK
0 23456718
3
Note: An internal write cycle (TWC) is initiated on the rising edge of CS after a valid write STATUS register
sequence.
25AA010A/25LC010A
DS21832E-page 12 © 2008 Microchip Technology Inc.
2.7 Data Protection
The following protection has been implemented to
prevent inadver tent w rites to the a rray:
• The write enable latch is reset on power-up
• A write enable instruction must be issued to set
the write enable latch
• After a byte write, page write or STATUS register
write, the write enable latch is reset
•CS
must be set high after the proper number of
clock cycles to start an internal write cycle
• Access to the array during an internal write cycle
is ignored and programming is continued
2.8 Power-On State
The 25XX0 10A pow ers on in the follow ing s tate:
• The device is in low-power Standby mode
(CS =1)
• The write enable latch is reset
• SO is in high-impedance state
• A high-to-low-level transition on CS is required to
enter active state
TABLE 2-4: WRITE-PROTECT FUNCTIONALITY MATRIX
WP
(pin 3) WEL
(SR bit 1) Protected Blocks Unprotected Blocks Status Register
0 (low) xProtected Protected Protected
1 (high) 0Protected Protected Protected
1 (high) 1Protected Writable Writable
x = don’t care
© 2008 Microchip Technology Inc. DS21832E-page 13
25AA010A/25LC010A
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLE
3.1 Chip Select (CS)
A low level on this pin selects the device. A high level
deselects the device and forces it into Standby mode.
However, a programming cycle which is already
initiated or in p r ogre ss w il l be co mpl ete d, regardle ss of
the CS input signal. If CS is brought high during a
progra m cycle, t he device wil l go into Standb y mode as
soon as the programming cycle is complete. When the
device is deselected, SO goes to the high-impedance
state, allowing multiple parts to share the same SPI
bus. A low-to-high transition on CS after a valid write
sequence initiates an internal write cycle. After power-
up, a low lev el on CS is required p r ior to any se qu enc e
being initiated.
3.2 Serial Output (SO)
The SO pin is used to transfer data out of the
25XX010A. During a read cycle, data is shifted out on
this pin after the falling edge of the serial clock.
3.3 Write-Protect (WP)
The WP pin is a hardware write-protect input pin.
When it is low, all writ es to the arra y or STATUS re g-
ister are disabled, but any other operations function
normally. When WP is high, all functions, including
nonvolatile writes operate normally. At any time, when
WP is low, the write enable Reset latch will be reset
and progra m mi n g w i ll be in hi bi te d . Howeve r, if a wri t e
cycle is already in progress, WP going low will not
change or disable the write cycle. See Table 2-4 for
the Write- Prot ect Fu nct ional it y Matr i x.
3.4 Serial Input (SI)
The SI pin is used to transfer data into the device. It
receives instructions, addresses and data. Data is
latched on the rising edge of the serial clock.
3.5 Serial Clock (SCK)
The SCK is used to synchronize the communication
between a master and the 25XX010A. Instructions,
address es or data presen t on the SI pin are la tc hed on
the risin g edge of t he c lo ck in put, w hil e d at a on th e SO
pin is updated after the falling edge of the clock input.
3.6 Hold (HOLD)
The HOLD pin is used to suspend transmission to the
25XX010A while in the middle of a serial sequence
withou t having to retransmit the entire se quence ag ain.
It must be he ld high any t ime t his fun cti on is not bei ng
used. Once the device is selected and a serial
sequence is underway, the HOLD pin may be pulled
low to pause further serial communication without
resetting the serial sequence. The HOLD pin must be
brought low while SCK is low, otherwise the HOLD
function will not be invoked until the next SCK high-to-
low transition. The 25XX010A must remain selected
during this sequence. The SI, SCK and SO pins are in
a high-impedance state during the time the device is
paus ed and tran sitions on these p ins will be ignored. To
resume serial communication, HOLD must be brought
high while the SCK pin is low, otherwise serial
communication will not resume. Lowering the HOLD
line at any time will tri-state the SO line.
Name
PDIP, SOIC,
MSOP,
TSSOP,
DFN
Rotated
TSSOP SOT-
23 Function
CS 1 3 5 Chip Select Input
SO 2 4 4 Serial Data Output
WP 3 5 — Write-Protect Pin
VSS 4 6 2 Ground
SI 5 7 3 Serial Data Input
SCK 6 8 1 Serial Clock Input
HOLD 7 1 — Hold Input
VCC 8 2 6 Supply Voltage
25AA010A/25LC010A
DS21832E-page 14 © 2008 Microchip Technology Inc.
4.0 PACKAGING INFORMATION
4.1 Package Marking Information
T/XXXNNN
XXXXXXXX
YYWW
8-Lead PDIP
8-Lead SOIC
XXXXYYWW
XXXXXXXT
NNN
XXXX
TYWW
8-Lead TSSOP
NNN
I/P 1L7
25AA010A
0627
Example:
Example:
SN 0627
25AA01AI
1L7
1L7
5A1A
I627
Example:
1st Line Marking Codes
25AA010A 5A1A
8-Lead MSOP (150 mil) Example:
XXXXXT
YWWNNN 5L1AI
6271L7
25LC010A A1AX
5L1A L1AX
Legend: XX...X Customer-specific information
Y Year code (last digit of calendar year)
YY Ye ar code (last 2 digits of calendar year)
WW Week code (week of January 1 is week ‘01’)
NNN Alphanumeric traceability code
Pb-free JEDEC designator for Matte Tin (Sn)
*This package is Pb-free. The Pb-free JEDEC designator ( )
can be found on the outer packaging for this package.
Note: In the event the full Mi croch ip p art numb er ca nnot be mark ed on one l ine, it w ill
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
3
e
3
e
3
e
3
e
Part Number TSSOP
Standard Rotated MSOP SOT-23 DFN
5A1AT
5L1AT 12NN
15NN 16NN 401
404 405
——
I Temp.E Te mp.I Temp. E Temp.
Note: T = Temperature grade (I, E) NN = Alphanumeric traceability code
© 2008 Microchip Technology Inc. DS21832E-page 15
25AA010A/25LC010A
Package Marking Information (continued)
6-Lead SOT-23
XXNN
Example:
12L7
XXX
8-Lead 2X3 DFN
YWW
NN
Example:
401
627
L7
25AA010A/25LC010A
DS21832E-page 16 © 2008 Microchip Technology Inc.
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© 2008 Microchip Technology Inc. DS21832E-page 17
25AA010A/25LC010A
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DS21832E-page 18 © 2008 Microchip Technology Inc.
! ""#$%& !'
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© 2008 Microchip Technology Inc. DS21832E-page 19
25AA010A/25LC010A
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!"#$%&"' ()"&'"!&)&#*&&&#
'!!#.#&"#'#%!&"!!#%!&"!!!&$#''!#
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&#%% =
: >#& . ?1,
##4>#& . -
##49& - -
3&9& 9 ?
3&& 9 .3
3& IB = <B
9#4!! =
9#>#& ) = -
D
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E
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NOTE 1
12
b
e
c
A
A1
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L1 L
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25AA010A/25LC010A
DS21832E-page 20 © 2008 Microchip Technology Inc.
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& ?1,
: 8& = =
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&#%% =
: >#& . 1,
##4>#& . -1,
: 9& -1,
3&9& 9 ? <
3&& 9 .3
3& B = <B
9#4!! < = -
9#>#& ) =
D
N
E
E1
NOTE 1
12
e
b
A
A1
A2
c
L1 L
φ
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© 2008 Microchip Technology Inc. DS21832E-page 21
25AA010A/25LC010A
.$*-,'/00%&.
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: 8& <
&#%%
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: 9& 1,
: >#& . -1,
.$!##9& - =
.$!##>#& . =
,&&>#& ) -
,&&9& 9 -
,&&&.$!## C = =
D
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E
NOTE 1
12
EXPOSED PAD
NOTE 1
21
D2
K
L
E2
N
e
b
A3 A1
A
NOTE 2
BOTTOM VIEW
TOP VIEW
* ,-,
25AA010A/25LC010A
DS21832E-page 22 © 2008 Microchip Technology Inc.
.$*-,'/00%&.
3&'!&"&4#*!(!!&4%&&#&
&&255***''54
© 2008 Microchip Technology Inc. DS21832E-page 23
25AA010A/25LC010A
1 !(""!( !(/
'!!#.#&"#'#%!&"!!#%!&"!!!&$#''!#
'!#&.0
1,2 1!'!&$& "!**&"&&!
3&'!&"&4#*!(!!&4%&&#&
&&255***''54
6&! 99..
'!9'&! 7 7: ;
7"')%! 7 ?
& 1,
:"&!#9#& 1,
: 8& =
##44!! < = -
&#%% =
: >#& . = -
##4>#& . - = <
: 9& = -
3&9& 9 = ?
3&& 9 - = <
3& B = -B
9#4!! < = ?
9#>#& ) =
b
E
4
N
E1
PIN1IDBY
LASER MARK
D
123
e
e1
A
A1
A2 c
L
L1
φ
* ,<1
25AA010A/25LC010A
DS21832E-page 24 © 2008 Microchip Technology Inc.
APPENDIX A: REVISION HIST ORY
Revision B
Corrections to Section 1.0, Electrical Characteristics.
Revision C
Added Pack ages SOT-23, DFN and X-rot ated TSSOP;
Revised AC Char., Params. 9, 10; Revised Package
Legend.
Revision D
Revised Pb-free in Features section; Replaced
Package Drawings; Revised Product ID System.
Revision E
Removed Preliminary status; Revised Table 1-2, AC
Characteristices Params. 7 and 8; Updated Package
Drawings.
© 2008 Microchip Technology Inc. DS21832E-page 25
25AA010A/25LC010A
THE MICROCHIP WEB SITE
Microc hip pro vides onl ine s upport v ia our W WW site at
www.microchi p.c om . Thi s web si te i s us ed as a m ean s
to make files and information easily available to
customers. Accessible by using your favorite Internet
browser, the web site contains the following
information:
•Product Support – Data sheets and errata,
application notes and sample programs, design
resources, user’s guides and hardware support
documents, latest software releases and archived
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•General Technical Support – Frequently Asked
Questions (FAQ), technical support requests,
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program member listing
•Business of Microchip – Product selector and
ordering guides, latest Microchip press releases,
listing of seminars and events, listings of
Microchip sales offices, distributors and factory
representatives
CUSTOMER CHANGE NOTIFICATION
SERVICE
Microchip’s customer notification service helps keep
customers current on Microchip products. Subscribers
will receive e-mail notification whenever there are
changes, updates, revisions or errata related to a
specif ied produ ct family or develo pment tool of interes t.
To register, access the Microchip web site at
www.microchip.com, click on Customer Change
Notification and follow the registration instructions.
CUSTOMER SUPP ORT
Users of Microchip products can receive assistance
through several channels:
• Distributor or Representative
• Local Sales Office
• Field Application Engineer (FAE)
• Technical Support
• Development Systems Information Line
Customers should contact their distributor,
representative or field application engineer (FAE) for
support. Local sales offices are also available to help
customers. A listing of sales offices and locations is
included in the back of this document.
Technical s upport is a vailable through the web si te
at: http://support.microchip.com
25AA010A/25LC010A
DS21832E-page 26 © 2008 Microchip Technology Inc.
READER RESP ONSE
It is ou r intentio n to provide you w it h th e b es t do cument ation po ss ib le to ensure suc c es sfu l u se of y ou r M ic roc hip prod-
uct. If you wi sh to prov ide you r comment s on org aniza tion, clar ity, subj ect matte r , and ways i n which o ur docum entatio n
can better serve you, please FAX your comments to the Technical Publications Manager at (480) 792-4150.
Please list the following information, and use this outline to provide us with your comments about this document.
To: Technical Publications Manager
RE: Reader Response Total Pages Sent ________
From: Name
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Address
City / State / ZIP / Country
Telephone: (_______) _________ - _________
Application (optional):
Would you like a reply? Y N
Device: Literature Number:
Questions:
FAX: (______) _________ - _________
DS21832E25AA010A/25LC010A
1. What are the best features of this document ?
2. How does this document meet your hardware and software development needs?
3. Do you find the organization of this document easy to follow? If not, why?
4. What additions to the document do you think would enhance the structure and subject?
5. What deletions from the document could be made without affecting the overall usefulness?
6. Is there any incorrect or misleading information (what and where)?
7. How would you improve this document?
© 2008 Microchip Technology Inc. DS21832E-page 27
25AA010A/25LC010A
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales off ice.
PART NO. X/XX
PackageTape & Reel
Device
Device: 25AA010A:
25LC010A:
1k-Bit, 1.8 V, 16 Byt e Page, SPI Serial EEPRO M
1k-Bit, 2.5 V, 16 Byte Page, SPI Serial EEPROM
Tape & Reel: Blank =
T=
Standard packaging
Tape & Reel
Temperature
Range: I=
E=
-40°C to+85°C
-40°C to+125°C
Package: MS =
P=
SN =
ST =
MC =
OT =
Plastic MSOP (Micro Small Outline), 8-lead
Plastic DIP (300 mil body), 8-lead
Plastic SOIC (3.90 mm body), 8-lead
TSSOP, 8-lead
2x3 DFN, 8-lead
SOT-23, 6-lead (Tape and Reel only)
Examples:
a) 25AA010A-I/MS = 1k-bit, 16-byte page, 1.8V
Serial EEPROM, Industrial temp., MSOP
package
b) 25AA010AT-I/SN = 1k-bit, 16-byte page, 1.8V
Serial EEPROM, Industrial temp., T ape & Reel,
SOIC package
c) 25LC010AT-I/SN = 1k-bit, 16-byte page, 2.5V
Serial EEPROM, Industrial temp., Tape & Reel,
SOIC package
d) 25LC010AT-I/ST = 1k-bit, 16-byte page, 2.5V
Serial EEPROM, Industrial temp., Tape & Reel,
TSSOP package
e) 25LC01 0AT-E/SN = 1k-b it, 16 -byte pag e, 2.5V
serial EEPROM, Extended temp., Tape & Reel,
SOIC Package
–X
Temperature
25AA010A/25LC010A
DS21832E-page 28 © 2008 Microchip Technology Inc.
NOTES:
© 2008 Microchip Technology Inc. DS21832E-page 29
Information contained in this publication regarding device
applications and the like is provided only for your con ve nience
and may be supersed ed by updates. It is y our respo ns ibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,
PICSTART, rfPIC and SmartShunt are registered trademarks
of Microchip Technology Incorporated in the U.S.A. and other
countries.
FilterLab, Linear Active Thermistor, MXDEV, MXLAB,
SEEV AL, SmartSensor and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, In-Circuit Serial
Prog ra m ming, IC S P, ICE PI C , M i n di , MiWi, MPASM , MPLAB
Certified logo, MPLIB, MPLINK, mTouch, PICkit, PICDEM,
PICDEM.net, PICtail , PIC32 logo, PowerCal, PowerInfo,
PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total
Endurance, UNI/O, WiperLock and ZENA are trademarks of
Microchip Technology I ncorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip T echnology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2008, Microchip Technology Incorporated, Pr inted in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Note the following details of the code protection feature on Microchip devices:
• Microchip products meet the specification contained in their particular Microchip Data Sheet.
• Microchip believes that it s family of products is one of the most secure families of its kind on the market today, when used in t he
intended manner and under normal conditions.
• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contai ned in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
• Microchip is willing to work with the customer who is concerned about the integrity of their code.
• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is c onstantly evolving. We a t Microc hip are co m mitted to continuously improving the code prot ect ion featur es of our
products. Attempts to break Microchip’ s code protection feature may be a violation of the Digital Millennium Copyright Act. If such act s
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code ho pping
devices, Serial EEPROMs, microperiph erals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS21832E-page 30 © 2008 Microchip Technology Inc.
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