Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw1
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
MicroPower Microprocessor Reset Circuit
Features General Description
Applications
•Computers
•Cell Phones
•Portable Electronics
•µP Power Supply Monitoring
The APR3021/2/3 are designed to monitor voltage
supplies in µP and digital systems. The quiescent
current is extremely low, typically 1.5 µA, making it
ideal for portable battery operated equipment. The
APR3021/2/3 operate by monitoring the system
power supply voltage. When the input voltage drops
below a fixed threshold, the device asserts a reset
signal for a fixed time period after Vcc rises above
the fixed threshold. The APR3021/2/3 series is avail-
able with three output stage versions : APR3021
push-pull active low output, APR3022 push-pull ac-
tive high output and APR3023 open drain active low
output. They are also designed to reject fast line tran-
sient glitches on Vcc. The APR3021/2/3 are come in
a miniature SOT-23, SOT-23-5, SOT-89 packages.
Pin Configuration
SOT-23 (Top View)
Reset
12
3
VCC
GND
Reset
(3021/3)
(3022)
SOT-23-5 (Top View)
SOT-89 (Top View)
VCC
GND
NCNC
123
45
Reset
Reset
(3021/3)
(3022)
GND
213
Reset
Reset
(3021/3)
(3022) VCC
• 1.2V to 5.5V Input Voltage Range
• Low Quiescent Current : less Than 1.5 µA
• High accuracy detection threshold : ±1.5%
• Fixed trimmed reset thresholds for 1.5V, 1.75V,
2.32V, 2.63V, 2.93V, 3.08V, 3.9V, 4.38V.
• Reset Timeout Period 250ms
• Available output configurations
- Open-drain output
- CMOS active high output
- CMOS active low output
• SOT-23 , SOT-23-5 and SOT-89 packages
• No external components
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw2
Pa ckage Code
A : SOT -23 B : S O T -23-5 D : SOT-8 9
Tem p . R ange
I : -4 0 to 8 5 C
H andling Code
TR : Tape & R eel
Vo ltage Code :
15 : 1.5V ~ 43 : 4.38V
Lead F re e C ode
L : Lead F ree D evice Blank : O rigin al De vice
APR 3021/2/3 -
H andling Code
Tem p . R ange
Pa ckage Code
Vo ltage Code
Da te Co d e
X X
Vo ltage Code A:1.5V B:1.75V C:2.32V D:2.63V E:2.93V F :3.08V G :3.9V H:4.38V
21 /2 /3
APR3021/2/3
XXXXX 15 XXXXX - D ate C ode ; 15 - 1.5VAP R3 021/2/3 -15 D :
AP R 3021/2/3 A /B :
Lead F re e C ode
Ordering and Marking Information
Absolute Maximum Ratings
Symbol Parameter Value Unit
VCC V
CC to GND -0.3 to 6 V
RESET to GND (Push-Pull Output) -0.3 to VCC +0.3
VRESET RESET to GND (Open Drain Output) -0.3 to 6 V
IMAX Maximum Continuous Input Current 20 mA
IRESET RESET/RESET Current 20 mA
dVcc/dt Rate of Rise of VCC 100
V/µs
TJ Junction Temperature Range -40 to 150 °C
TL Lead Temperature (Soldering, 10 second) 260 °C
SOT-23 357
SOT-23-5 357
RTH,JA Thermal Resistance – Junction to Ambient SOT-89 180 °C/W
PD Power Dissipation Internally Limited W
°
Pin Descrpition
PIN
No. Name Description
RESET
(APR3021/3) RESET output remains low while VCC is below the reset threshold and remains
so for a fixed time period after VCC raises above the reset threshold
1 RESET
(APR3022) RESET output remains high while VCC is below the reset threshold and remains
so for a fixed time period after VCC raises above the reset threshold.
2 VCC Supply Voltage (+1.2V to +6V)
3 GND Ground connection
Note: The pin sequence here might not be correct for all different package types, and please refer pin
configuration in page1 for correct pin assignment.
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw3
Block Diagram
Vc c
GND
VREF
Reset
Generator
+ Timer
Oscillator
RESET
APR3021
Vc c
GND
VREF
Reset
Generator
+ Timer
Oscillator
RESET
APR3022
Vc c
GND
VREF
Reset
Generator
+ Timer
Oscillator
RESET
APR3023
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw4
Part Number Description
Part Number Part Description
APR 30 21 Reset Output Push P ull Active Low wi th De lay
APR 3022 Reset Output Pu sh Pull Active High w ith Delay
APR30 23 Reset Output Open Drain Active Low w ith Delay
Electrical Characteristics
APR3021/2/3
Symbol
Parameter Test Conditions
Min. Typ. Max.
Unit
VCC Supply Voltage 1.2 6
V
ICC Supply Current VCC=1.5V~6V 1.5 4
µA
T
A=-40 to 85°C 3 5
T A=25°C ±1.5%
VTH Reset Threshold T A=-40 to 85°C ±2%
VHYST Hysteresis Range 20 mV
TRTP Reset Ti meout Period 150 250 350
ms
VOL Reset Output Low ISINK=1.2mA 0.5 V
VOH Reset Output High ISOURCE=0.6mA 0.8*VCC
TD VCC to Reset Delay VCC=VTH to (VTH-100mV) 25
µS
ILE Reset Output Leakage 0.5 µA
VIN = 5V, TA = -40 to 85°C unless otherwise noted. Typical values are at TA=25°C, VCC = 5V for 4.38V
versions, VCC = 3.3V for 3.08/2.93V versions, VCC = 3.0V for 2.63V. versions and VCC = 2.5V for 2.32V
versions, VCC = 2.0V for 1.75V versions , VCC = 1.8V for 1.5V versions.
Application Circuit
VCC VCC
GND
100k
APR3023 RESET RESET
INPUT µP
VCC
GND
VCC VCC
GND
RESET
(RESET) RESET
INPUT µP
VCC
GND
APR3021
APR3022
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw5
Timing Chart
Vcc
RESET
Res et Ti m eout Period 250m s V c c t o Res et Delay 25us
Res et Thres hold Res et Thres hold
RESET
(APR3022)
(APR3021/3)
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw6
0
5
10
15
20
25
30
35
40
45
50
0123456
Vcc=2.9V
Vcc=2V
Vcc=2.5V
Vcc=1.5
0
10
20
30
40
50
60
70
0123456
Vcc=4V
Vcc=3V
Vcc=5V
0
0.4
0.8
1.2
1.6
2
0123456
Typical Characteristics
Supply Current vs. Supply V oltage
Supply Current (uA)
Supply V oltage (V)
Maximum Transient Duration vs.
Reset Threshold Overdrive VTH - VCC
Maximum Transient Duration (us)
0
20
40
60
80
100
120
10 100 1000
Reset Threshold Overdrive VTH - VCC (mV)
Output Source Current vs. Reset High Output Voltage
Output Source Current (mA)
Reset High Output V oltage (V)
Output Sink Current vs. Reset Low Output V oltage
Output Sink Current (mA)
Reset Low Output V oltage (V)
generate a reset signal
never generate a reset signal
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw7
0
0.5
1
1.5
2
2.5
3
3.5
-40-200 20406080100120
Vcc=3V
Vcc=5V
0
100
200
300
400
500
600
-40 -20 0 20 40 60 80 100 120
0
10
20
30
40
50
60
-40-200 20406080100120
VOD=100mV
0.994
0.996
0.998
1
1.002
1.004
1.006
1.008
-40 -20 0 20 40 60 80 100 120
Normalized Reset Threshold vs. Temperature
Typical Characteristics
Normalized Reset Threshold (%)
T emperature (°C)
Reset Propagation Delay vs. Temperature
Reset Propagation Delay (us)
T emperature (°C)
Reset T imeout Period vs. Temperature
Reset Timeout Period (ms)
T emperature (°C)
Supply Current vs. Temperature
Supply Current (uA)
T emperature (°C)
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw8
Power Up
Typical Characteristics
Power Down
Time (200ms/div)
Vcc(2V/div)
RESET(2V/div)
Vcc(2V/div)
RESET(2V/div)
Vcc(0.5V/div)
Vcc to RESET Delay
Vcc=VTH to (VTH-100mV)
RESET(2V/div)
Time (10us/div)
Time (50ms/div)
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw9
Application Information
VCC Transient Rejection
The APR3021/2/3 have the function to reject the tran-
sient glitches from the power line. The Maximum Tran-
sient Duration vs. Reset Threshold Overdrive shows
at Typical Characteristics.The transient voltage with
the duration under the curve will not generate a reset
signal, e.g. a transient of 100mV below the reset
threshold voltage have the duration more than 35us, it
will generate a reset signal. Connect a 0.1uF bypass
capacitor to the VCC pin can improve the transient
immunity.
Reset Output
The APR3021/2/3 have 3 output stage versions:
APR3001 is an active low push-pull output, when the
VCC drops below the reset threshold, the RESET out-
put generates a low signal. APR3022 is an active high
push-pull output, when the VCC drops below the reset
threshold, the RESET output generates a high signal
(see Timing Chart). APR3023 is an active low open
drain output, the RESET output must be connected a
pull-up resistor to a supply voltage that is lower than
6V, it suits to use in multiple voltage systems (see
Figure 2). The APR3021 RESET output is valid until
the VCC=1.2V, below 1.2V the IC is shutdown, and
the output becomes a floating state. If it is a trouble, a
resistor should be connected from reset output to
ground to keep the reset output low (see Figure 1).
For The APR3022, a pull-up resistor to VCC is required
to keep the valid reset output for VCC below 1.2V.
RESET
VCC
GND
VCC
100K
Figure 1. Ensuring RESET Valid to VCC = 0 V
VCC
APR3023
RESET
GND
+3.3V +5.0V
VCC
GND
RESET
INPUT 5V
System
100k
Figure 2. APR3023 Open Drain Output with Multiple
Supplies
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw10
Packaging Information
SOT-23
D
E H
e
A
A1 LC
B
3
2
1
Millimeters Inches
Dim Min. Max. Min. Max.
A 1.00 1.30 0.039 0.051
A1 0.00 0.10 0.000 0.004
B 0.35 0.51 0.014 0.020
C 0.10 0.25 0.004 0.010
D 2.70 3.10 0.106 0.122
E 1.40 1.80 0.055 0.071
e 1.90/2.1 BSC 0.075/0.083 BSC
H 2.40 3.00 0.094 0.118
L 0.37 0.015
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw11
Packaging Information
SOT-23-5
e1
E1 E
b
12 3
45
e
D
A2 A
A1 L 2 L
L 1
a
Millimeters Inches
Dim Min. Max. Min. Max.
A 0.95 1.45
0.037 0.057
A1 0.05 0.15 0.002 0.006
A2 0.90 1.30 0.035 0.051
b 0.30 0.50
0.011 0.019
D 2.8 3.00
0.110 0.118
E 2.6 3.00
0.102 0.118
E1 1.5 1.70
0.059 0.067
e 0.95BSC 0.037BSC
e1 1.90BSC 0.074BSC
L 0.35 0.55
0.014 0.022
L1 0.20 BSC 0.008 BSC
L2 0.5 0.7 0.020 0.028
N 5 5
α 0° 10° 0° 10°
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw12
Packaging Information
SOT-89 (Reference EIAJ ED-7500A Reg stration SC-62)
D
D1
e
B1
e1
B
123
L
HE
C
a
a
A
Millimeters Inches
Dim Min. Max. Min. Max.
A 1.40 1.60 0.055 0.063
B 0.40 0.56 0.016 0.022
B1 0.35 0.48 0.014 0.019
C 0.35 0.44 0.014 0.017
D 4.40 4.60 0.173 0.181
D1 1.35 1.83 0.053 0.072
e 1.50 BSC 0.059 BSC
e1 3.00 BSC 0.118 BSC
E 2.29 2.60 0.090 0.102
H 3.75 4.25 0.148 0.167
L 0.80 1.20 0.031 0.047
α10°10°
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw13
Physical Specifications
t 2 5 C to P ea k
tp
Ramp-up
tL
Ramp-down
ts
Preheat
Tsmax
Tsmin
TL
TP
25
Temperature
Time
Critic al Zone
TL to TP
°
Terminal Material Solder- P lated C opp er (Solde r Ma ter ial : 90/10 or 63/37 S nP b), 100 % Sn
Lead Solde rability Mee ts EIA S pe c ification RSI86-91, ANSI/J-ST D - 00 2 Category 3.
Reflow Condition (IR/Convection or VPR Reflow)
Classificatin Reflow Profiles
Sn-Pb Eutectic Assembly Pb-Free Assembly
Profile Feature Large Body Small Body Large Body Small Body
Average ramp-up rate
(TL to TP) 3°C/second max. 3°C/second max.
Preheat
- Temperature Mi n (Tsmin)
- Temperature Mix (Tsmax)
- Time (min to max)(ts)
100°C
150°C
60-120 seconds
150°C
200°C
60-180 seconds
Tsmax to TL
- Ramp-up Rate 3°C/second max
Tsmax to TL
- Temperature(TL)
- Time (tL)
183°C
60-150 seconds
217°C
60-150 seconds
Peak Temperature(Tp) 225 +0/-5°C 240 +0/-5°C 245 +0/-5°C 250 +0/-5°C
Time within 5°C of actual Peak
Temperature(tp) 10-30 seconds 10-30 seconds 10-30 seconds 20-40 seconds
Ramp-down Rate 6°C/second max. 6°C/second max.
Time 25°C to Peak Temperature
6 minutes max. 8 minutes max.
Note: All temperatures refer to topside of the package. Measured on the body surface.
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw14
Carrier Tape & Reel Dimensions
A
J
B
T2
T1
C
t
Ao
E
W
Po P
Ko
Bo
D1
D
F
P1
Reliability test program
Test item M ethod Desc ription
SOLDERABILITY MIL-STD-883D-2003
245°C, 5 SEC
HOLT MIL-STD-883D-1005.7
1000 H rs B ias @ 1 25°C
PCT JESD-22-B,A102
168 H rs, 100%RH, 121°C
TST MIL-STD-883D-1011.9
-65°C~150°C, 200 C ycles
ESD MIL-STD-883 D-3015.7 VH BM > 2KV, VMM > 200V
Latch-Up JESD 7 8 10ms, 1tr > 100mA
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3021/2/3
www.anpec.com.tw15
Application Carrier Width Cover Tap e Width Devices Per Reel
SOT - 23 8 5.3 3000
SOT - 23-5 8 5.3 3000
SOT - 89 12 9.3 1000
Cover Tape Dimensions
Anpec Electronics Corp.
Head Office :
5F, No. 2 Li-Hsin Road, SBIP,
Hsin-Chu, Taiwan, R.O.C.
Tel : 886-3-5642000
Fax : 886-3-5642050
Taipei Branch :
7F, No. 137, Lane 235, Pac Chiao Rd.,
Hsin Tien City, Taipei Hsien, Taiwan, R. O. C.
Tel : 886-2-89191368
Fax : 886-2-89191369
Customer Service
A
pp
lication A B C J T1 T2 W P E
178±160
± 1 .0 1 2 .0 2 .5 ± 0.15 9.0 ± 0 .5 1 .4 8.0+ 0.3
- 0 .3 4.0 1.75
F D D1 Po P1 Ao Bo Ko t
SOT-23
3.5 ± 0.05 1.5 +0.1
φ
0.1MIN 4.0 2.0 ± 0.05 3.1 3.0 1.3 0.2±0.03
A
pp
lication A B C J T1 T2 W P E
178 ±172
± 1.0 13.0 + 0.2 2.5 ± 0.15 8.4 ± 2 1 .5 ± 0.3 8 .0 ± 0.3 4 ± 0 .1 1 .7 5± 0.1
F D D1 Po P1 Ao Bo Ko t
SOT-23-5
3.5 ± 0.05 1.5± 0 .1 1.5 ± 0 .1 4.0 ± 0 .1 2 .0 ± 0.1 3.15 ± 0 .1 3 .2± 0 .1 1.4 ± 0.1 0 .2 ±0.033
A
pp
lication A B C J T1 T2 W P E
178 ±170
± 213.5 ± 0.15 3 ± 0.15 14 ± 2 1 .3 ± 0.3 12 + 0.3
12 - 0.1 8 ± 0 .1 1.7 5 ± 0.1
F D D1 Po P1 Ao Bo Ko t
SOT-89
5.5 ± 0.05 1.5± 0 .1 1.5 ± 0 .1 4.0 ± 0 .1 2 .0 ± 0.1 4 .8 ± 0 .1 4 .5± 0.1 1.80 ± 0 .1 0 .3 ±0.013
Carrier Tape & Reel Dimensions
(mm)
