74AC161M STMicroelectronics, 74AC161M Datasheet - Page 2
74AC161M
Manufacturer Part Number
74AC161M
Description
Counter ICs Sync Binary Counter
Manufacturer
STMicroelectronics
Datasheet
1.74AC161M.pdf
(13 pages)
Specifications of 74AC161M
Logic Family
74AC
Number Of Bits
4
Counting Method
Synchronous
Counting Sequence
Up
Mounting Style
SMD/SMT
Package / Case
SO-16
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
74AC161
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
X : Don’t Care; A, B, C, D; Logic level of data input; CARRY OUT : TE x QA x QB x QC x QD
LOGIC DIAGRAM
2/13
CLEAR
H
H
H
H
H
L
LOAD
X
H
H
H
X
L
INPUTS
PE
X
X
X
H
X
L
TE
X
X
X
H
X
L
CK
X
A
L
PIN DESCRIPTION
14, 13, 12,
3, 4, 5, 6
PIN No
10
15
16
11
1
2
7
9
8
NO CHANGE
NO CHANGE
NO CHANGE
B
L
COUNT UP
OUTPUTS
CARRY OUT Terminal Count Output
A, B, C, D
SYMBOL
QA toQD
CLEAR
CLOCK
LOAD
C
GND
L
V
PE
TE
CC
Master Reset
Clock Input (LOW to
HIGH Edge Trigger)
Data Inputs
Count Enable Input
Count Enable Carry Input
Parallel Enable Input
Flip-Flop Outputs
Ground (0V)
Positive Supply Voltage
D
L
NAME AND FUNCTION
PRESET TO "0"
PRESET DATA
NO COUNT
NO COUNT
NO COUNT
FUNCTION
COUNT