74ACT163MTR Datasheet, PDF (2/13 Pages) STMicroelectronics – SYNCHRONOUS PRESETTABLE 4-BIT COUNTER

74ACT163
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1
2
3, 4, 5, 6
7
10
9
14, 13, 12,
11
15
8
16
SYMBOL
CLEAR
CLOCK
A, B, C, D
PE
TE
LOAD
QA toQD
NAME AND FUNCTION
Master Reset
Clock Input (LOW to
HIGH Edge Trigger)
Data Inputs
Count Enable Input
Count Enable Carry Input
Parallel Enable Input
Flip-Flop Outputs
CARRY OUT Terminal Count Output
GND Ground (0V)
V_CC
Positive Supply Voltage
TRUTH TABLE
INPUTS
OUTPUTS
CLEAR LOAD
PE
TE
CK
L
X
X
X
L
L
L
H
L
X
X
A
B
C
H
H
X
L
NO CHANGE
H
H
L
X
NO CHANGE
H
H
H
H
COUNT UP
H
X
X
X
NO CHANGE
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
FUNCTION
L
RESET TO "0"
D
PRESET DATA
NO COUNT
NO COUNT
COUNT
NO COUNT
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