M54HC193D1 查看數據表（PDF） - STMicroelectronics
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M54HC193D1 Datasheet PDF : 13 Pages
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M54HC193
IEC LOGIC SYMBOLS
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 N°
3, 2, 6, 7
4
5
11
12
13
14
15, 1, 10, 9
8
16
SYMBOL
QA to QD
CCD
CCU
LOAD
CARRY
BORROW
CLR
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
FUNCTION
COUNT UP
NO COUNT
COUNT DOWN
NO COUNT
PRESET
RESET
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