74act16101 STMicroelectronics, 74act16101 Datasheet - Page 2

• Manufacturer Part Number: 74act16101
• Description: Synchronous Presettable 4-bit Counter
• Manufacturer: STMicroelectronics

74ACT161
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
H
X
X
X
L
X
TE
X
X
X
H
X
L
CLOCK
X
A
L
PIN DESCRIPTION
14, 13, 12,
3, 4, 5, 6
PIN No
10
11
15
16
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
CLOCK
CLEAR
LOAD
GND
C
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 QND FUNCTION
PRESET DATA
RESET TO "0"
NO COUNT
NO COUNT
NO COUNT
FUNCTION
COUNT