M74HC20
DUAL 4-INPUT NAND GATE
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■
■
■
■
■
■
HIGH SPEED:
tPD = 9ns (TYP.) at VCC = 6V
LOW POWER DISSIPATION:
ICC = 1µA(MAX.) at TA=25°C
HIGH NOISE IMMUNITY:
VNIH = V NIL = 28 % VCC (MIN.)
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 4mA (MIN) at VCC = 4.5V
BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
WIDE OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 20
DESCRIPTION
The M74HC20 is an high speed CMOS DUAL
4-INPUT NAND GATE fabricated with silicon gate
C2MOS technology.
The internal circuit is composed of 3-stage
including buffered output, which gives high noise
immunity and stable output.
)
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DIP
PACKAGE
TUBE
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TSSOP
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ORDER CODES
DIP
SOP
TSSOP
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SOP
M74HC20B1R
M74HC20M1R
T&R
M74HC20RM13TR
M74HC20TTR
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
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PIN CONNECTION AND IEC LOGIC SYMBOLS
July 2001
1/8
M74HC20
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
1, 9
2, 10
3, 11
4, 12
5, 13
6, 8
7
1A to 2A
1B to 2B
N.C.
1C to 2C
1D to 2D
1Y to 2Y
GND
VCC
14
NAME AND FUNCTION
Data Inputs
Data Inputs
Not Connected
Data Inputs
Data Inputs
Data Outputs
Ground (0V)
Positive Supply Voltage
)
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TRUTH TABLE
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
Parameter
)-
Supply Voltage
VI
DC Input Voltage
VO
DC Output Voltage
IIK
DC Input Diode Current
IOK
DC Output Diode Current
IO
DC Output Current
A
B
C
D
Y
L
X
X
X
H
X
L
X
X
H
X
X
L
X
H
X
X
X
L
H
H
H
H
H
L
t(s
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P
ICC or IGND DC VCC or Ground Current
PD
Power Dissipation
Tstg
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TL
b
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Storage Temperature
Lead Temperature (10 sec)
u
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Value
Unit
-0.5 to +7
V
-0.5 to VCC + 0.5
-0.5 to VCC + 0.5
V
± 20
mA
± 20
mA
± 25
mA
± 50
mA
V
500(*)
mW
-65 to +150
°C
300
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
(*) 500mW at 65 °C; derate to 300mW by 10mW/°C from 65°C to 85°C
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
Parameter
Supply Voltage
Unit
2 to 6
V
VI
Input Voltage
0 to VCC
V
VO
Output Voltage
0 to VCC
V
Top
Operating Temperature
Input Rise and Fall Time
tr, tf
2/8
Value
-55 to 125
°C
VCC = 2.0V
0 to 1000
ns
VCC = 4.5V
0 to 500
ns
VCC = 6.0V
0 to 400
ns
M74HC20
DC SPECIFICATIONS
Test Condition
Symbol
VIH
Parameter
High Level Input
Voltage
Low Level Input
Voltage
VIL
High Level Output
Voltage
VOH
VOL
II
Low Level Output
Voltage
ICC
Input Leakage
Current
Quiescent Supply
Current
Value
TA = 25°C
VCC
(V)
Min.
2.0
4.5
6.0
2.0
4.5
6.0
Typ.
Max.
1.5
3.15
4.2
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
1.5
3.15
4.2
0.5
1.35
1.8
0.5
1.35
1.8
V
0.5
1.35
1.8
1.9
2.0
1.9
1.9
IO=-20 µA
4.4
4.5
4.4
4.4
6.0
IO=-20 µA
5.9
6.0
5.9
4.5
IO=-4 mA
4.18
4.31
4.13
5.68
du
5.9
6.0
IO=-5.2 mA
2.0
IO=20 µA
0.0
0.1
4.5
IO=20 µA
0.0
0.1
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P
6.0
IO=20 µA
0.0
0.1
0.17
0.18
5.63
V
4.10
5.60
0.1
0.1
0.1
0.1
0.1
0.1
0.26
0.33
0.40
0.26
0.33
0.40
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V
)
s
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IO=-20 µA
4.5
so
Max.
1.5
3.15
4.2
2.0
5.8
Unit
V
4.5
IO=4 mA
6.0
IO=5.2 mA
6.0
VI = VCC or GND
± 0.1
±1
±1
µA
6.0
VI = VCC or GND
1
10
20
µA
)
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AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
Symbol
d
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ttLH ttHL
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Parameter
Output Transition
Time
tpLH tpHL Propagation Delay
Time
Test Condition
Value
TA = 25°C
VCC
(V)
Min.
2.0
4.5
6.0
2.0
4.5
6.0
Typ.
Max.
30
8
7
30
10
9
75
15
13
80
16
14
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
95
19
16
100
20
17
Unit
Max.
110
22
19
120
24
20
ns
ns
CAPACITANCE CHARACTERISTICS
Test Condition
Symbol
Parameter
VCC
(V)
Value
TA = 25°C
Min.
Typ.
Max.
10
CIN
Input Capacitance
5.0
5
CPD
Power Dissipation
Capacitance (note
1)
5.0
27
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
10
Unit
Max.
10
pF
pF
1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/2 (per gate)
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M74HC20
TEST CIRCUIT
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CL = 50pF or equivalent (includes jig and probe capacitance)
RT = ZOUT of pulse generator (typically 50Ω)
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WAVEFORM 1: PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)
)
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M74HC20
Plastic DIP-14 MECHANICAL DATA
mm.
inch
DIM.
MIN.
a1
0.51
B
1.39
TYP
MAX.
MIN.
TYP.
MAX.
0.020
1.65
0.055
0.065
b
0.5
0.020
b1
0.25
0.010
D
)
s
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ct
20
E
8.5
e
2.54
e3
15.24
u
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0.335
7.1
I
5.1
1.27
s
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c
2.54
e
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bs
O
)
3.3
Z
Pr
0.100
F
L
0.787
0.600
0.280
0.201
0.130
0.050
0.100
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P001A
5/8
M74HC20
SO-14 MECHANICAL DATA
mm.
DIM.
MIN.
TYP
A
inch
MAX.
MIN.
TYP.
a1
1.75
MAX.
0.1
0.068
0.2
a2
0.003
0.007
1.65
0.064
b
0.35
0.46
0.013
b1
0.19
0.25
0.007
C
0.5
0.018
)
s
(
ct
0.010
0.019
c1
45° (typ.)
D
8.55
8.75
0.336
E
5.8
6.2
0.228
e
1.27
e3
7.62
F
3.8
4.0
4.6
5.3
L
0.5
)
(s
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1.27
S
Pr
0.344
0.244
0.050
G
M
u
d
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0.68
0.300
0.149
0.157
0.181
0.208
0.019
0.050
0.026
8° (max.)
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PO13G
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M74HC20
TSSOP14 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
A
MAX.
MIN.
TYP.
MAX.
1.2
A1
0.05
A2
0.8
b
0.047
0.15
0.002
0.004
0.006
1.05
0.031
0.039
0.041
0.19
0.30
0.007
c
0.09
0.20
0.004
D
4.9
5
5.1
0.193
E
6.2
6.4
6.6
0.244
E1
4.3
4.4
4.48
1
e
bs
0.65 BSC
K
0°
L
0.45
let
o
s
b
0.60
s
(
t
c
0.75
du
ro
P
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0.0089
0.197
0.201
0.252
0.260
0.173
0.176
0.0256 BSC
0°
8°
0.018
0.024
0.030
u
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P
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A
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8°
0.012
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0.169
)
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A2
A1
b
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K
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D
E1
PIN 1 IDENTIFICATION
1
0080337D
7/8
M74HC20
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Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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