HD74LS194A Datasheet, PDF (5/8 Pages) Hitachi Semiconductor – 4-bit Bidirectional Universal Shift Registers

HD74LS194A
Testing Table
Inputs
Item From input to output
CLR
S₁
S₀
CK
L
R
A
B
C
D
right-shift
ƒ_{max left-shift}
4.5V 4.5V GND IN 4.5V IN GND GND GND GND
4.5V GND 4.5V IN
IN 4.5V GND GND GND GND
Clear→Q
t_PLH
t_PHL Clock→Q
IN 4.5V 4.5V IN GND GND 4.5V 4.5V 4.5V 4.5V
4.5V 4.5V GND IN 4.5V IN GND GND GND GND
4.5V 4.5V GND IN
IN 4.5V GND GND GND GND
Item From input to output
right-shift
ƒ_{max left-shift}
Clear→Q
t_PLH
t_PHL Clock→Q
Q_A
OUT
OUT
OUT
OUT
OUT
Q_B
OUT
OUT
OUT
OUT
OUT
Outputs
Q_C
OUT
OUT
OUT
OUT
OUT
Q_D
OUT
OUT
OUT
OUT
OUT
Waveforms 1
(ƒ_max, CK→Q)
t_TLH
t_THL
t_n ^tn+1
t_n ^tn+1
Notes:
CK
L, R
90% 90%
10% ^{1.3V 1.3V} 10%
1.3V
t_{w (CK)}
t_su t_h
t_su
t_THL
1.3V
90%
1.3V
10%
t_PHL
t_PLH
3V
1.3V
t_h
1.3V
0V
t_TLH
90%
3V
10% ^1.3V
0V
t_PHL
t_PLH
V_OH
Q
1.3V
1.3V
1.3V
1.3V
V_OL
1. Right-shift is measured with Q_A at t_{n + 1}, Q_B at t_{n + 2}, Q_C at t_{n + 3}, and Q_D at t_{n + 4}. Left-shift is
measured with Q_A at t_{n + 4}, Q_B at t_{n + 3}, Q_C at t_{n + 2}, and Q_D at t_{n + 1}.
Rev.3.00, Jul.15.2005, page 5 of 7