HD74LS164 Datasheet, PDF (6/9 Pages) Hitachi Semiconductor – 8-Bit Parallel-Out Serial-In Shift Registers

HD74LS164
Waveform
Notes:
t_{w (CLR)}
t_THL ≥ 20ns
t_TLH
3V
Clear
90%
90%
1.3V _{10% 10%} 1.3V
0V
Clock
A
t_{w (CK)}
t_THL
t_TLH
≥ 20ns
1.3V
1.3V
3V
90%
90%
10% 10% ^1.3V
0V
1.3V
10%
t_su t_h
t_THL
90%
90%
1.3V
10%
t_su t_h
3V
1.3V
1.3V
0V
t_PHL
t_TLH
t_PLH
Q_A
1.3V
1.3V
t_PHL
1.3V
V_OH
V_OL
1. Input pulse; t_TLH ≤ 15 ns, t_THL ≤ 6 ns, PRR = 1 MHz, (Clock, Clear), PRR = 500 kHz (A or B)
2. Q_A output is illustrated. Relationship of serial input A and B data to other Q outputs is
illustrated in the timing chart.
Rev.2.00, Feb.18.2005, page 6 of 8