HD74HC164
Test Circuit
Measurement point
C
L*
Note: C
L
includes the probe and fig capacitance.
Waveforms
t
f
90%
t
r
90%
50%
10% 10%
V
CC
0V
V
CC
50%
50%
Clear
50%
t
W (Clear)
t
f
90%
t
rem
t
r
50%
90%
50%
10%
t
W (Clock)
Clock
10%
t
W (Clock)
t
r
Serial A, B
10%
90%
50%
0V
t
su
90%
t
h
50%
t
h
V
CC
50%
50%
10%
t
PHL
Output Q
A
(Note 3)
50%
t
su
t
PLH
50%
t
f
t
PHL
0V
V
OH
50%
V
OL
t
THL
t
TLH
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 Q
B
to Q
H
outputs.
Rev.3.00, Jan 31, 2006 page 5 of 6