5-1
FACT DATA
The MC74AC74/74ACT74 is a dual D-type flip-flop with Asynchronous Clear
and Set inputs and complementary (Q,Q) outputs. Information at the input is
transferred to the outputs on the positive edge of the clock pulse. Clock triggering
occurs at a voltage level of the clock pulse and is not directly related to the transition
time of the positive-going pulse. After the Clock Pulse input threshold voltage has
been passed, the Data input is locked out and information present will not be
transferred to the outputs until the next rising edge of the Clock Pulse input.
Asynchronous Inputs:
LOW input to SD (Set) sets Q to HIGH level
LOW input to CD (Clear) sets Q to LOW level
Clear and Set are independent of clock
Simultaneous LOW on CD and SD makes both Q and Q HIGH
•Outputs Source/Sink 24 mA
• ′ACT74 Has TTL Compatible Inputs
CP1CD2
CP2
1314 12 11 10 9 8
21 3 4 5 6 7
VCC
CD1 D1CP1SD1 Q1Q1
CD2 D2CP2SD2 Q2Q2
CD1
SD1
Q1
D1SD2Q2
Q2
D2
GND
Q1
PIN NAMES
D1, D2Data Inputs
CP1, CP2Clock Pulse Inputs
CD1, CD2 Direct Clear Inputs
SD1, SD2 Direct Set Inputs
Q1, Q1, Q2, Q2Outputs
TRUTH TABLE (Each Half)
Inputs Outputs
SDCDCP D Q Q
L H X X H L
H L X X L H
L L X X H H
H H H H L
H H L L H
H H L X Q0Q0
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
= LOW-to-HIGH Clock Transition
Q0(Q0) = Previous Q(Q) before
LOW-to-HIGH Transition of Clock
DUAL D-TYPE POSITIVE
EDGE-TRIGGERED
FLIP-FLOP
N SUFFIX
CASE 646-06
PLASTIC
D SUFFIX
CASE 751A-03
PLASTIC
LOGIC SYMBOL
SD1
Q1
CP1
Q1
CD1
SD2 Q2
D2CP2
Q2
CD2
D1
MC74AC74 MC74ACT74
5-2
FACT DATA
SD
D
CP
CD
Q
Q
LOGIC DIAGRAM
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
MAXIMUM RATINGS*
Symbol Parameter Value Unit
VCC DC Supply Voltage (Referenced to GND) –0.5 to +7.0 V
Vin DC Input Voltage (Referenced to GND) –0.5 to VCC +0.5 V
Vout DC Output Voltage (Referenced to GND) –0.5 to VCC +0.5 V
Iin DC Input Current, per Pin ±20 mA
Iout DC Output Sink/Source Current, per Pin ±50 mA
ICC DC VCC or GND Current per Output Pin ±50 mA
Tstg Storage Temperature –65 to +150 °C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Typ Max Unit
VCC
Supply Voltage
′AC 2.0 5.0 6.0
V
VCC
Supply Voltage
′ACT 4.5 5.0 5.5
V
Vin, Vout DC Input Voltage, Output Voltage (Ref. to GND) 0 VCC V
tr, tf
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
VCC @ 3.0 V 150
tr, tf
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
VCC @ 4.5 V 40 ns/V
r, tf
′AC Devices except Schmitt Inputs
VCC @ 5.5 V 25
tr, tf
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
VCC @ 4.5 V 10
ns/V
tr, tf
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
VCC @ 5.5 V 8.0
ns/V
TJJunction Temperature (PDIP) 140 °C
TAOperating Ambient Temperature Range –40 25 85 °C
IOH Output Current — High –24 mA
IOL Output Current — Low 24 mA
1. Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2. Vin from 0.8 V to 2.0 V ; see individual Data Sheets for devices that dif fer from the typical input rise and fall times.
MC74AC74 MC74ACT74
5-3
FACT DATA
DC CHARACTERISTICS
Symbol
Parameter
VCC
(V)
74AC 74AC
Unit
Conditions
Symbol
Parameter
VCC
(V)
TA = +25°CTA =
–40°C to +85°C
Unit
Conditions
Typ Guaranteed Limits
VIH
Minimum High Level
Input Voltage
3.0 1.5 2.1 2.1 VOUT = 0.1 V
Input Voltage
4.5 2.25 3.15 3.15 V or VCC – 0.1 V
5.5 2.75 3.85 3.85
VIL
Maximum Low Level
Input Voltage
3.0 1.5 0.9 0.9 VOUT = 0.1 V
Input Voltage
4.5 2.25 1.35 1.35 V or VCC – 0.1 V
5.5 2.75 1.65 1.65
VOH
Minimum High Level
Output Voltage
3.0 2.99 2.9 2.9 IOUT = –50 µA
Output Voltage
4.5 4.49 4.4 4.4 V
5.5 5.49 5.4 5.4
V
*VIN = VIL or VIH
3.0 2.56 2.46
V
–12 mA
4.5 3.86 3.76
V
IOH –24 mA
5.5 4.86 4.76 –24 mA
VOL
Maximum Low Level
Output Voltage
3.0 0.002 0.1 0.1 IOUT = 50 µA
Output Voltage
4.5 0.001 0.1 0.1 V
5.5 0.001 0.1 0.1
V
*VIN = VIL or VIH
3.0 0.36 0.44
V
12 mA
4.5 0.36 0.44
V
IOL 24 mA
5.5 0.36 0.44 24 mA
IIN
Maximum Input
Leakage Current
5.5
±0.1
±1.0
µA
VI = VCC, GND
Leakage Current
5.5
±0.1
±1.0
µA
VI = VCC, GND
IOLD
†Minimum Dynamic
Output Current
5.5 75 mA VOLD = 1.65 V Max
IOHD
Output Current
5.5 –75 mA VOHD = 3.85 V Min
ICC
Maximum Quiescent
Supply Current
5.5
4.0
40
µA
VIN = VCC or GND
Supply Current
5.5
4.0
40
µA
VIN = VCC or GND
* All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
Note: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V VCC.
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
Symbol
Parameter
VCC*
(V)
74AC 74AC
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Min Typ Max Min Max
fmax
Maximum Clock
Frequency
3.3 100 125 95
MHz
3-3
fmax
Frequency
5.0 140 160 125
MHz
3-3
tPLH
Propagation Delay
CDn or SDn to Qn or Qn
3.3 5.0 8.0 12.5 4.0 13.0
ns
3-6
tPLH
C
Dn or SDn to Qn or Qn
5.0 3.5 6.0 9.0 3.0 10.0
ns
3-6
tPHL
Propagation Delay
CDn or SDn to Qn or Qn
3.3 4.0 10.5 12.0 3.5 13.5
ns
3-6
tPHL
C
Dn or SDn to Qn or Qn
5.0 3.0 8.0 9.5 2.5 10.5
ns
3-6
tPLH
Propagation Delay
CPn to Qn or Qn
3.3 4.5 8.0 13.5 4.0 16.0
ns
3-6
tPLH
CPn to Qn or Q
n
5.0 3.5 6.0 10.0 3.0 10.5
ns
3-6
tPHL
Propagation Delay
CPn to Qn or Qn
3.3 3.5 8.0 14.0 3.5 14.5
ns
3-6
tPHL
CPn to Qn or Q
n
5.0 2.5 6.0 10.0 2.5 10.5
ns
3-6
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
MC74AC74 MC74ACT74
5-4
FACT DATA
AC OPERATING REQUIREMENTS
Symbol
Parameter
VCC*
(V)
74AC 74AC
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Typ Guaranteed Minimum
ts
Set-up Time, HIGH or LOW 3.3 1.5 4.0 4.5
ns
3-9
ts
Dn to CPn5.0 1.0 3.0 3.0
ns
3-9
th
Hold Time, HIGH or LOW 3.3 –2.0 0.5 0.5
ns
3-9
th
Dn to CPn5.0 –1.5 0.5 0.5
ns
3-9
tw
CPn or CDn or SDn 3.3 3.0 5.5 7.0
ns
3-6
tw
Pulse Width 5.0 2.5 4.5 5.0
ns
3-6
trec
Recovery TIme 3.3 –2.5 0 0
ns
3-9
trec
CDn or SDn to CP 5.0 –2.0 0 0
ns
3-9
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
DC CHARACTERISTICS
Symbol
Parameter
VCC
(V)
74ACT 74ACT
Unit
Conditions
Symbol
Parameter
VCC
(V)
TA = +25°CTA =
–40°C to +85°C
Unit
Conditions
Typ Guaranteed Limits
VIH
Minimum High Level
Input Voltage
4.5 1.5 2.0 2.0
V
VOUT = 0.1 V
Input Voltage
5.5 1.5 2.0 2.0
V
or VCC – 0.1 V
VIL
Maximum Low Level
Input Voltage
4.5 1.5 0.8 0.8
V
VOUT = 0.1 V
Input Voltage
5.5 1.5 0.8 0.8
V
or VCC – 0.1 V
VOH
Minimum High Level
Output Voltage
4.5 4.49 4.4 4.4
V
IOUT = –50 µA
Output Voltage
5.5 5.49 5.4 5.4
V
*VIN = VIL or VIH
4.5 3.86 3.76 V
IOH
–24 mA
5.5 4.86 4.76
IOH
–24 mA
VOL
Maximum Low Level
Output Voltage
4.5 0.001 0.1 0.1
V
IOUT = 50 µA
Output Voltage
5.5 0.001 0.1 0.1
V
*VIN = VIL or VIH
4.5 0.36 0.44 V
IOL
24 mA
5.5 0.36 0.44
IOL
24 mA
IIN
Maximum Input
Leakage Current
5.5
±0.1
±1.0
µA
VI = VCC, GND
Leakage Current
5.5
±0.1
±1.0
µA
VI = VCC, GND
∆ICCT Additional Max. ICC/Input 5.5 0.6 1.5 mA VI = VCC – 2.1 V
IOLD
†Minimum Dynamic
Output Current
5.5 75 mA VOLD = 1.65 V Max
IOHD
Output Current
5.5 –75 mA VOHD = 3.85 V Min
ICC
Maximum Quiescent
Supply Current
5.5
4.0
40
µA
VIN = VCC or GND
Supply Current
5.5
4.0
40
µA
VIN = VCC or GND
* All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
MC74AC74 MC74ACT74
5-5
FACT DATA
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
Symbol
Parameter
VCC*
(V)
74ACT 74ACT
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Min Typ Max Min Max
fmax
Maximum Clock
Frequency
5.0
145
210
125
MHz
3-3
fmax
Frequency
5.0
145
210
125
MHz
3-3
tPLH
Propagation Delay
CDn or SDn to Qn or Qn
5.0
3.0
5.5
9.5
2.5
10.5
ns
3-6
tPLH
C
Dn or SDn to Qn or Qn
5.0
3.0
5.5
9.5
2.5
10.5
ns
3-6
tPHL
Propagation Delay
CDn or SDn to Qn or Qn
5.0
3.0
6.0
10.0
3.0
11.5
ns
3-6
tPHL
C
Dn or SDn to Qn or Qn
5.0
3.0
6.0
10.0
3.0
11.5
ns
3-6
tPLH
Propagation Delay
CPn to Qn or Qn
5.0
4.0
7.5
11.0
4.0
13.0
ns
3-6
tPLH
CPn to Qn or Q
n
5.0
4.0
7.5
11.0
4.0
13.0
ns
3-6
tPHL
Propagation Delay
CPn to Qn or Qn
5.0
3.5
6.0
10.0
3.0
11.5
ns
3-6
tPHL
CPn to Qn or Q
n
5.0
3.5
6.0
10.0
3.0
11.5
ns
3-6
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
AC OPERATING REQUIREMENTS
Symbol
Parameter
VCC*
(V)
74ACT 74ACT
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Typ Guaranteed Minimum
ts
Set-up Time, HIGH or LOW
5.0
1.0
3.0
3.5
ns
3-9
ts
Dn to CPn
5.0
1.0
3.0
3.5
ns
3-9
th
Hold Time, HIGH or LOW
5.0
–0.5
1.0
1.0
ns
3-9
th
Dn to CPn
5.0
–0.5
1.0
1.0
ns
3-9
tw
CPn or CDn or SDn
5.0
3.0
5.0
6.0
ns
3-6
tw
Pulse Width
5.0
3.0
5.0
6.0
ns
3-6
trec
Recovery TIme
5.0
–2.5
0
0
ns
3-9
trec
CDn or SDn to CP
5.0
–2.5
0
0
ns
3-9
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
CAPACITANCE
Symbol Parameter Value
Typ Unit Test Conditions
CIN Input Capacitance 4.5 pF VCC = 5.0 V
CPD Power Dissipation Capacitance 35 pF VCC = 5.0 V
MC74AC74 MC74ACT74
5-6
FACT DATA
OUTLINE DIMENSIONS
N SUFFIX
PLASTIC DIP PACKAGE
CASE 646–06
ISSUE L
NOTES:
1. LEADS WITHIN 0.13 (0.005) RADIUS OF TRUE
POSITION AT SEATING PLANE AT MAXIMUM
MATERIAL CONDITION.
2. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
3. DIMENSION B DOES NOT INCLUDE MOLD
FLASH.
4. ROUNDED CORNERS OPTIONAL.
1 7
14 8
B
A
F
H G D K
C
N
L
J
M
SEATING
PLANE
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.715 0.770 18.16 19.56
B0.240 0.260 6.10 6.60
C0.145 0.185 3.69 4.69
D0.015 0.021 0.38 0.53
F0.040 0.070 1.02 1.78
G0.100 BSC 2.54 BSC
H0.052 0.095 1.32 2.41
J0.008 0.015 0.20 0.38
K0.115 0.135 2.92 3.43
L0.300 BSC 7.62 BSC
M0 10 0 10
N0.015 0.039 0.39 1.01
_ _ _ _
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751A–03
ISSUE F
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
–A–
–B–
G
P7 PL
14 8
71 M
0.25 (0.010) B M
S
B
M
0.25 (0.010) A S
T
–T–
F
RX 45
SEATING
PLANE
D14 PL K
C
J
M
_
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A8.55 8.75 0.337 0.344
B3.80 4.00 0.150 0.157
C1.35 1.75 0.054 0.068
D0.35 0.49 0.014 0.019
F0.40 1.25 0.016 0.049
G1.27 BSC 0.050 BSC
J0.19 0.25 0.008 0.009
K0.10 0.25 0.004 0.009
M0 7 0 7
P5.80 6.20 0.228 0.244
R0.25 0.50 0.010 0.019
_ _ _ _
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MC74AC74/D
*MC74AC74/D*
◊
