M54HC243F1R データシートの表示（PDF） - STMicroelectronics
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M54HC243F1R Datasheet PDF : 11 Pages
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M54/M74HC242/243
CHIP CARRIER
TRUTH TABLE
INPUTS
GAB GBA
H
H
L
L
H
L
L
H
FUNCTION
OUTPUTS
A BUS B BUS HC242 HC243
OUTPUT INPUT A = B A = B
INPUT OUTPUT B = A B = A
HIGH IMPEDANCE Z
Z
HIGH IMPEDANCE Z
Z
PIN DESCRIPTION
PIN No
1
2, 12
3, 4, 5, 6
11, 10, 9, 8
13
7
14
SYMBOL
GAB
NC
1A to 4A
1B to 4B
GBA
GND
VCC
NAME AND FUNCTION
Output Enable Input
(active LOW)
Not connected
Data Inputs/Outputs
Data Inputs/Outputs
Output Enable Input
Ground (0V)
Positive Supply Voltage
IEC LOGIC SYMBOLS
HC242
HC243
2/11
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