HD74LS195A Datasheet, PDF (5/8 Pages) Hitachi Semiconductor – 4-bit Parallel-Access Shift Registers

HD74LS195A
Testing Method
Test Circuit
4.5V
P.G.
Zout = 50Ω
Input
P.G.
Zout = 50Ω
Input
V_CC
CK
Shift/Load
J
K
A
B
C
D
CLR
Output
QA
Load circuit 1
RL
CL
Output
QB
Same as Load Circuit 1.
Output
QC
Same as Load Circuit 1.
Output
QD
Same as Load Circuit 1.
Output
QD
Same as Load Circuit 1.
Notes: 1. C_L includes probe and jig capacitance.
2. All diodes are 1S2074(H).
Testing Table
Item From input to output
ƒ_max
t_PLH
t_PHL
Clear→ Q_A to Q_D
Clock→ Q_A to Q_D, Q_D
CLR
4.5V
IN
4.5V
4.5V
Shift /
Load
4.5V
GND
4.5V
GND
J
4.5V
4.5V
4.5V
4.5V
K
GND
4.5V
GND
4.5V
Inputs
CK
IN
IN
IN
IN
A
4.5V
4.5V
4.5V
IN
B
4.5V
4.5V
4.5V
IN
Item From input to output
ƒ_max
t_PLH
t_PHL
Clear→ Q_A to Q_D
Clock→ Q_A to Q_D, Q_D
Q_A
OUT
OUT
OUT
OUT
Q_B
OUT
OUT
OUT
OUT
Outputs
Q_C
OUT
OUT
OUT
OUT
Q_D
OUT
OUT
OUT
OUT
C
4.5V
4.5V
4.5V
IN
D
4.5V
4.5V
4.5V
IN
Q_D
OUT
—
OUT
OUT
Rev.3.00, Jul.15.2005, page 5 of 7