HD74LV161A_15 Datasheet, PDF (4/18 Pages) Renesas Technology Corp – Synchronous 4-bit Binary Counter (Direct Clear)

HD74LV161A
Function Table
Inputs
Outputs
CLR
LOAD
ENP
ENT
CLK
QA
QB
QC
QD
L
X
X
X
X
L
L
L
L
H
L
X
X
↑
A
B
C
D
H
H
X
L
↑
No change
H
H
L
X
↑
No change
H
H
H
H
↑
Count up
H
X
X
X
↓
No change
Note: H: High level
L: Low level
X: Immaterial
↑: Low to high transition
↓: High to low transition
A, B, C, D: Data input
Carry = ENT • QA • QB • QC • QD
Pin Arrangement
CLR 1
CK 2
A3
B4
C5
D6
ENP 7
GND 8
16 V_CC
15
CARRY
OUTPUT
14 QA
13 QB
12 QC
11 QD
10 ENT
9 LOAD
(Top view)
Rev.4.00 Jun. 04, 2004 page 2 of 15