TC74ACT161F_12 Datasheet, PDF (2/12 Pages) Toshiba Semiconductor – Synchronous Presettable 4-Bit Binary Counter

Pin Assignment
TC74ACT161,163P/F
IEC Logic Symbol
TC74ACT161
TC74ACT163
Truth Table
Inputs
Outputs
CLR CLR
(161) (163) ^LOAD
ENP
ENT
CK
(161)
CK
(163)
QA
QB
QC
QD
Function
L
L
X
X
X
X
L
L
L
L Reset to “0”
H
H
L
X
X
A
B
C
D Preset Data
H
H
H
X
L
No Change
No Count
H
H
H
L
X
No Change
No Count
H
H
H
H
H
Count Up
Count
H
X
X
X
X
No Change
No Count
X: Don’t care
A, B, C, D: Logic level of data inputs
Carry: Carry = ENTï½¥QAï½¥QBï½¥QCï½¥QD
2
2012-02-29