English
Language : 

HD74LS161A Datasheet, PDF (5/11 Pages) Hitachi Semiconductor – Synchronous 4-bit Binary Counters(direct clear)
◁
HD74LS161A
Timing Method
Clock
Load
Data
Outputs
A to D
Enable
P or T
tw (CK)
1.3V
1.3V
tsu th
1.3V
1.3V
tsu th
1.3V
1.3V
3V
1.3V
0V
3V
0V
3V
0V
tsu
th
3V
1.3V 1.3V
0V
Testing Method
Test Circuit
4.5V
P.G.
Zout = 50Ω
Input
P.G.
Zout = 50Ω
Input
VCC
QA
Load
CK
QA
A
B
C
QB
D
QC
P
T
QD
Ripple
CLR Carry
RL Load circuit 1
CL
QB
Same as Load Circuit 1.
QC
Same as Load Circuit 1.
QD
Same as Load Circuit 1.
Ripple
Carry
Same as Load Circuit 1.
Notes: 1. CL includes probe and jig capacitance.
2. All diodes are 1S2074(H).
Rev.2.00, Feb.18.2005, page 5 of 10
 ▷