HD74HC164 Datasheet, PDF (5/7 Pages) Hitachi Semiconductor – 8-bit Parallel-out Shift Register

HD74HC164
Test Circuit
Measurement point
C_L*
Note: C_L includes the probe and fig capacitance.
Waveforms
Clear
Clock
Serial A, B
Output QA
(Note 3)
tf
tr
90%
50%
10% 10%
tW (Clear)
90%
50%
trem
tf
tr
90%
10%
90%
50%
50%
10%
tW (Clock)
tr
th
10%
90%
50%
50%
tPHL
tsu tPLH
tW (Clock)
50%
50%
tsu
90%
50%
10%
tf
th
50%
tPHL
50%
tTHL
50%
tTLH
50%
V_CC
0V
V_CC
0V
V_CC
0V
VOH
VOL
Notes: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
2. The output are measured one at a time with one transition per measurement.
3. See function table for QB to QH outputs.
Rev.3.00, Jan 31, 2006 page 5 of 6