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( DataSheet : www.DataSheet4U.com )
Dual 4ĆInput NAND Gate
Outputs Source/Sink 24 mA
• ′ACT20 Has TTL Compatible Inputs
Pinout: 14-Lead Packages (Top View)
VCC A1 B1 NC C1 D1 O1
14 13 12 11 10 9 8
1234567
A0 B0 NC C0 D0 O0 GND
PIN NAMES
An, Bn, Cn, Dn
On
Inputs
Outputs
MC74AC20
MC74ACT20
DUAL 4-INPUT
NAND GATE
14
1
N SUFFIX
CASE 646-06
PLASTIC PACKAGE
D SUFFIX
CASE 751A-03
PLASTIC PACKAGE
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
VCC
Vin
Vout
Iin
Iout
ICC
Tstg
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC VCC or GND Current per Output Pin
Storage Temperature
–0.5 to +7.0
–0.5 to VCC + 0.5
–0.5 to VCC + 0.5
± 20
± 50
± 50
–65 to +150
V
V
V
mA
mA
mA
°C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
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FACT DATA
5-1
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MC74AC20 MC74ACT20
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min Typ
VCC
Supply Voltage
AC
ACT
2.0 5.0
4.5 5.0
VREG
DC Regulated Power Voltage (Ref. to GND)
0
Input Rise and Fall Time (Note 1)
tr, tf AC Devices except Schmitt Inputs
Input Rise and Fall Time (Note 2)
tr, tf ACT Devices except Schmitt Inputs
TJ Junction Temperature (PDIP)
TA Operating Ambient Temperature Range
IOH Output Current — HIGH
IOL Output Current — LOW
VCC @ 3.0 V
VCC @ 4.5 V
VCC @ 5.5 V
VCC @ 4.5 V
VCC @ 5.5 V
–40
150
40
25
10
8.0
25
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 differ from the typical input rise and fall times.
DC CHARACTERISTICS
74AC
74AC
Symbol
Parameter
VCC
(V)
TA = +25°C
TA =
–40°C to +85°C
Unit
Typ Guaranteed Limits
VIH Minimum High Level
Input Voltage
3.0 1.5 2.1
4.5 2.25 3.15
5.5 2.75 3.85
2.1
3.15
3.85
V
VIL Maximum Low Level
Input Voltage
3.0 1.5 0.9
4.5 2.25 1.35
5.5 2.75 1.65
0.9
1.35
1.65
V
VOH
Minimum Low Level
Output Voltage
3.0 2.99 2.9
4.5 4.49 4.4
5.5 5.49 5.4
2.9
4.4
5.4
V
VOL
Maximum Low Level
Output Voltage
3.0 2.56
4.5 3.86
5.5 4.86
3.0 0.002 0.1
4.5 0.001 0.1
5.5 0.001 0.1
2.46
3.76
4.76
0.1
0.1
0.1
V
V
3.0 0.36
4.5 0.36
5.5 0.36
IIN Maximum Input
Leakage Current
5.5 ±0.1
IOLD
IOHD
ICC
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5
5.5
5.5 4.0
* 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.
0.44
0.44
0.44
±1.0
75
–75
40
V
µA
mA
mA
µA
Min
6.0
5.5
VCC
Unit
V
V
ns/V
ns/V
140 °C
85 °C
–24 mA
24 mA
Conditions
VOUT = 0.1 V
or VCC – 0.1 V
VOUT = 0.1 V
or VCC – 0.1 V
IOUT = – 50 µA
*VIN = VIL or VIH
– 12 mA
IOH – 24 mA
– 24 mA
IOUT = 50 µA
*VIN = VIL or VIH
12 mA
IOL 24 mA
24 mA
VI = VCC, GND
VOLD = 1.65 V Max
VOHD = 3.85 V Min
VIN = VCC or GND
FACT DATA
5-2

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MC74AC20 MC74ACT20
AC CHARACTERISTICS
Symbol
Parameter
tPLH
Propagation Delay
tPHL
Propagation Delay
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
74AC
VCC*
(V)
TA = +25°C
CL = 50 pF
Min Typ Max
3.3 2.0 6.0 8.5
5.0 1.5 5.0 7.0
3.3 1.5 5.0 7.0
5.0 1.5 4.0 6.0
74AC
TA = –40°C
to +85°C
CL = 50 pF
Min Max
1.5 10.0
1.0 8.0
1.0 9.0
1.0 7.0
Unit
ns
ns
DC CHARACTERISTICS
74ACT
74ACT
Symbol
Parameter
VCC
(V)
TA = +25°C
TA =
–40°C to +85°C
Unit
Conditions
Typ Guaranteed Limits
VIH
VIL
VOH
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
4.5 1.5 2.0
5.5 1.5 2.0
4.5 1.5 0.8
5.5 1.5 0.8
4.5 4.49 4.4
5.5 5.49 5.4
2.0
2.0
0.8
0.8
4.4
5.4
V
VOUT = 0.1 V
or VCC – 0.1 V
V
VOUT = 0.1 V
or VCC – 0.1 V
V IOUT = – 50 µA
VOL
Maximum Low Level
Output Voltage
4.5 3.86
5.5 4.86
4.5 0.001 0.1
5.5 0.001 0.1
3.76
4.76
0.1
0.1
*VIN = VIL or VIH
V
IOH
– 24 mA
– 24 mA
V IOUT = 50 µA
IIN Maximum Input
Leakage Current
*VIN = VIL or VIH
4.5
5.5
0.36 0.44
0.36 0.44
V
IOH
24 mA
24 mA
5.5
±0.1 ±1.0
µA VI = VCC, GND
ICCT
IOLD
IOHD
ICC
Additional Max. ICC/Input
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5 0.6
5.5
5.5
5.5 4.0
1.5
75
–75
40
mA VI = VCC – 2.1 V
mA VOLD = 1.65 V Max
mA VOHD = 3.85 V Min
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.
FACT DATA
5-3

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MC74AC20 MC74ACT20
AC CHARACTERISTICS
Symbol
Parameter
tPLH
Propagation Delay
tPHL
Propagation Delay
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
74ACT
VCC*
(V)
TA = +25°C
CL = 50 pF
Min Typ Max
74ACT
TA = –40°C
to +85°C
CL = 50 pF
Min Max
5.0 2.0 6.5 9.0 1.5 10.5
5.0 2.0 5.5 9.0 1.5 10.5
Unit
ns
ns
CAPACITANCE
Symbol
Parameter
CIN
CPD
Input Capacitance
Power Dissipation Capacitance
Value
Typ
4.5
40
Unit
pF
pF
Test Conditions
VCC = 5.0 V
VCC = 5.0 V
FACT DATA
5-4

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14
1
A
F
HG
MC74AC20 MC74ACT20
8
B
7
OUTLINE DIMENSIONS
N SUFFIX
PLASTIC DIP PACKAGE
CASE 646–06
ISSUE L
C
N
SEATING
PLANE
D
K
L
J
M
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.
INCHES
DIM MIN MAX
A 0.715 0.770
B 0.240 0.260
C 0.145 0.185
D 0.015 0.021
F 0.040 0.070
G 0.100 BSC
H 0.052 0.095
J 0.008 0.015
K 0.115 0.135
L 0.300 BSC
M 0_ 10_
N 0.015 0.039
MILLIMETERS
MIN MAX
18.16 19.56
6.10 6.60
3.69 4.69
0.38 0.53
1.02 1.78
2.54 BSC
1.32 2.41
0.20 0.38
2.92 3.43
7.62 BSC
0_ 10_
0.39 1.01
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751A–03
ISSUE F
–A–
14
1
G
8
–B–
7
P 7 PL
0.25 (0.010) M B M
C R X 45 _
F
–T–
SEATING
PLANE
D 14 PL
K
0.25 (0.010) M T B S A S
M
J
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.
MILLIMETERS
INCHES
DIM MIN MAX MIN MAX
A 8.55 8.75 0.337 0.344
B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.054 0.068
D 0.35 0.49 0.014 0.019
F 0.40 1.25 0.016 0.049
G 1.27 BSC
0.050 BSC
J 0.19 0.25 0.008 0.009
K 0.10 0.25 0.004 0.009
M 0 _ 7_ 0_ 7_
P 5.80 6.20 0.228 0.244
R 0.25 0.50 0.010 0.019
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*MC74AC20/D*FACT DATA
5-5
MC74AC20/D