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M74HC193 データシートの表示(PDF) - STMicroelectronics
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コンポーネント説明
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M74HC193
SYNCHRONOUS UP/DOWN BINARY COUNTER
STMicroelectronics
M74HC193 Datasheet PDF : 14 Pages
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M74HC193
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
COUNT UP
H
H
X
X
X : Don’t Care
COUNT DOWN
H
H
X
X
LOAD
H
H
H
H
L
X
PIN DESCRIPTION
PIN No
3, 2, 6, 7
4
5
11
12
13
14
15, 1, 10, 9
8
16
SYMBOL
QA to QD
CP
D
CP
U
LOAD
CARRY
BORROW
CLEAR
A to D
GND
Vcc
NAME AND FUNCTION
Flip-Flop Outputs
Count Down Clock Input
Count Up Clock Input
Asynchronous Parallel
Load Input (Active LOW)
Count Up (Carry)
Output (Active LOW)
Count Down (Borrow)
Output (Active LOW)
Asynchronous Reset
Input (Active High)
Data Inputs
Ground (0V)
Positive Supply Voltage
CLEAR
L
L
L
L
L
H
FUNCTIO N
COUNT UP
NO COUNT
COUNT DOWN
NO COUNT
PRESET
RESET
2/14
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