74HC51(1992) データシートの表示（PDF） - STMicroelectronics
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74HC51 Datasheet PDF : 9 Pages
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M54/M74HC51
PIN DESCRIPTION
PIN No
1, 12, 13, 9,
10, 11
2, 3, 4, 5
8, 6
7
14
SYMBOL
1A to 1F
2A to 2D
1Y, 2Y
GND
VCC
NAME AND FUNCTION
Data Inputs
Data Inputs
Data Outputs
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
1A 1B 1C 1D 1E 1F 1Y
H
H
H
X
X
X
L
X
X
X
H
H
H
L
ALL OTHER COMBINATIONS
H
TRUTH TABLE
2A
2B
2C
2D
2Y
H
H
X
X
L
X
X
H
H
L
ALL OTHER COMBINATIONS
H
X = DON’T CARE
LOGIC DIAGRAM
IEC LOGIC SYMBOL
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC
Supply Voltage
-0.5 to +7
V
VI
DC Input Voltage
-0.5 to VCC + 0.5
V
VO
DC Output Voltage
-0.5 to VCC + 0.5
V
IIK
DC Input Diode Current
± 20
mA
IOK
DC Output Diode Current
± 20
mA
IO
DC Output Source Sink Current Per Output Pin
± 25
mA
ICC or IGND DC VCC or Ground Current
± 50
mA
PD
Power Dissipation
Tstg
Storage Temperature
TL
Lead Temperature (10 sec)
500 (*)
mW
-65 to +150
oC
300
oC
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied.
(*) 500 mW: ≅ 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC
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