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M54HC161D1 Datasheet(PDF) 2 Page - STMicroelectronics

Part # M54HC161D1
Description  RAD-HARD SYNCHRONOUS PRESETTABLE 4-BIT COUNTER
PDF  12 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M54HC161D1 Datasheet(HTML) 2 Page - STMicroelectronics

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M54HC161
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IEC LOGIC SYMBOLS
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
X : Don’t Care
A, B, C, D : Logic level of data inputs
Carry : CARRY = TE·QA·QB·QC·QD
PIN N°
SYMBOL
NAME AND FUNCTION
1
CLEAR
Asynchronous Master
Reset
2CLOCK
Clock Input (LOW to
HIGH, Edge-triggered)
3, 4, 5, 6
A, B, C, D
Data Inputs
7
PE
Count Enable Input
10
TE
Count Enable Carry Input
9LOAD
Parallel Enable Input
14, 13, 12,
11
QA to QD
Flip Flop Outputs
15
CARRY
Terminal Count Output
8
GND
Ground (0V)
16
VCC
Positive Supply Voltage
INPUTS
OUTPUTS
FUNCTION
CLEAR
LOAD
PE
TE
CLOCK
QAQBQC
QD
L
X
X
X
X
LLL
L
RESET TO "0"
H
L
X
X
A
B
C
D
PRESET DATA
H
H
X
L
NO CHANGE
NO COUNT
H
H
L
X
NO CHANGE
NO COUNT
H
H
H
H
COUNT UP
COUNT
H
X
X
X
NO CHANGE
NO COUNT



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