HD74LS669 Datasheet, PDF (5/9 Pages) Hitachi Semiconductor – Synchronous Up/Down 4-bit Binary Counters

HD74LS669
Testing Method
Test Circuit
4.5V
P.G.
Zout = 50Ω
Input
P.G.
Zout = 50Ω
Input
V_CC Output
QA
U/D
CK
A
B
C
D
E·P
Load
E·T
QB
QC
QD
RCO
RL ^{Load circuit 1}
CL
Output
Same as Load Circuit 1.
Output
Same as Load Circuit 1.
Output
Same as Load Circuit 1.
Output
Same as Load Circuit 1.
Notes: 1. C_L includes probe and jig capacitance.
2. All diodes are 1S2074(H).
Rev.2.00, Feb.18.2005, page 5 of 8