M74HC51
DUAL 2 WIDE 2 INPUT AND/OR INVERT GATE
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HIGH SPEED:
tPD = 11ns (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)
BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
WIDE OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 51
DESCRIPTION
The M74HC51 is an high speed CMOS DUAL 2
WIDE 2 INPUT AND/OR INVERT GATE
fabricated with silicon gate C2MOS technology.
It contains a 2-WIDE 2-INPUT AND/OR INVERT
GATE and a 2-WIDE 3-INPUT
AND/OR
INVERT GATE.
)
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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
M74HC51B1R
M74HC51M1R
T&R
M74HC51RM13TR
M74HC51TTR
The internal circuit is composed of 3 stages (2
INPUT) or 5 stages (3 INPUT) including buffer
output, which enables high noise immunity and
stable output.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
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PIN CONNECTION AND IEC LOGIC SYMBOLS
August 2001
1/9
M74HC51
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
1, 12, 13, 9,
10, 11
2, 3, 4, 5
8, 6
7
14
NAME AND FUNCTION
1A to 1F
Data Inputs
2A to 2D
1Y to 2Y
GND
VCC
Data Inputs
Data Outputs
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
1A
1B
1C
1D
1E
(s)
1F
1Y
ct
H
X
H
H
X
X
X
X
H
H
ALL OTHER COMBINATIONS
r
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TRUTH TABLE
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2A
H
X
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2B
2C
X
H
L
L
H
2D
2Y
H
X
X
X
H
H
ALL OTHER COMBINATIONS
L
L
H
X : Don’t Care
)
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ABSOLUTE MAXIMUM RATINGS
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Symbol
VCC
Parameter
Supply Voltage
Value
Unit
-0.5 to +7
V
-0.5 to VCC + 0.5
-0.5 to VCC + 0.5
V
DC Input Diode Current
± 20
mA
IOK
DC Output Diode Current
± 20
mA
IO
DC Output Current
± 25
mA
d
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VI
DC Input Voltage
VO
DC Output Voltage
IIK
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ICC or IGND DC VCC or Ground Current
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PD
Power Dissipation
Tstg
Storage Temperature
TL
Lead Temperature (10 sec)
V
± 50
mA
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
2/9
M74HC51
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
Parameter
Value
Supply Voltage
VI
Input Voltage
VO
Output Voltage
Top
Operating Temperature
Input Rise and Fall Time
tr, tf
Unit
2 to 6
V
0 to VCC
V
0 to VCC
V
-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
)
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DC SPECIFICATIONS
Test Condition
Symbol
VIH
Parameter
High Level Input
Voltage
High Level Output
Voltage
VOH
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II
ICC
Input Leakage
Current
Quiescent Supply
Current
O
)
Min.
Min.
r
P
e
Max.
let
o
s
b
Max.
1.5
3.15
4.2
0.5
1.35
1.8
0.5
1.35
1.8
1.9
1.9
4.5
IO=-20 µA
4.4
4.5
4.4
4.4
IO=-20 µA
5.9
6.0
5.9
5.9
t(s
V
0.5
1.35
1.8
2.0
Unit
Max.
1.5
3.15
4.2
1.9
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Typ.
-55 to 125°C
IO=-20 µA
V
V
IO=-4.0 mA
4.18
4.31
4.13
4.10
6.0
IO=-5.2 mA
5.68
5.8
5.63
5.60
2.0
IO=20 µA
0.0
0.1
0.1
0.1
4.5
IO=20 µA
0.0
0.1
0.1
0.1
6.0
IO=20 µA
0.0
0.1
0.1
0.1
4.5
IO=4.0 mA
0.17
0.26
0.33
0.40
6.0
IO=5.2 mA
0.18
0.26
0.33
0.40
6.0
VI = VCC or GND
± 0.1
±1
±1
µA
6.0
VI = VCC or GND
1
10
20
µA
4.5
Low Level Output
Voltage
1.5
3.15
4.2
-40 to 85°C
2.0
6.0
VOL
Min.
2.0
4.5
6.0
2.0
4.5
6.0
Low Level Input
Voltage
VIL
TA = 25°C
VCC
(V)
u
d
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Value
V
3/9
M74HC51
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
Test Condition
Symbol
Parameter
tTLH tTHL Output Transition
Time
tPLH tPHL Propagation Delay
Time
Value
TA = 25°C
VCC
(V)
Min.
2.0
4.5
6.0
2.0
4.5
6.0
Typ.
Max.
30
8
7
39
13
11
75
15
13
100
20
17
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
95
19
16
125
25
21
Symbol
Parameter
TA = 25°C
VCC
(V)
CIN
Input Capacitance
5.0
CPD
Power Dissipation
Capacitance (note
1)
5.0
Min.
Typ.
Max.
5
10
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32
b
O
Pr
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
10
ns
ns
)
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Value
Max.
110
22
19
150
30
26
CAPACITIVE CHARACTERISTICS
Test Condition
Unit
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
)
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TEST CIRCUIT
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CL = 50pF or equivalent (includes jig and probe capacitance)
RT = ZOUT of pulse generator (typically 50Ω)
4/9
M74HC51
WAVEFORM : PROPAGATION DELAY TIMES (f=1MHz; 50% duty cycle)
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5/9
M74HC51
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
d
o
0.335
7.1
I
5.1
1.27
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2.54
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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
6/9
M74HC51
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
o
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
7/9
M74HC51
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
O
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8°
0.012
t
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0.169
)
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A2
A1
b
O
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K
c
L
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D
E1
PIN 1 IDENTIFICATION
1
0080337D
8/9
M74HC51
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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.
© The ST logo is a registered trademark of STMicroelectronics
© 2001 STMicroelectronics - Printed in Italy - All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
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9/9
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