HD74HC173 Datasheet, PDF (5/8 Pages) Hitachi Semiconductor – 4-bit D-type Register (with 3-state Outputs)

HD74HC173
Waveforms
• Waveform – 1
Clear
Clock
Data
Output QH
tr
tf
90%
50%
10%
tW
tr
tf
50%
10%
trem
tW (H)
90% 90%
10%
10%
50%
tsu
th
90%
tf
50%
10% 10%
tPHL
90%
tr
tPLH
tW (L)
50%
tsu
50%
50%
th
50%
tPHL
90%
tTHL
50%
10%
10%
90%
50%
tTLH
50%
Note 1. Input pulse : PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
V_CC
0V
V_CC
0V
V_CC
0V
VOH
VOL
• Waveform – 2
t_f
t_r
90 %
90 %
V_CC
Output
50 %
50 %
Control
10 %
10 %
0V
t_ZL
t_LZ
V_OH
Waveform – A
50 %
10 %
t_ZH
t_HZ
V_OL
Waveform – B
90 %
V_OH
50 %
V_OL
Notes 1. Input pulse PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
2. Waveform – A is for an output with internal conditions such that
the output is low except when disabled by the output control.
3. waveform – B is for an output with internal conditions such that
the output is high except when disabled by the output control.
Rev.3.00, Jan 31, 2006 page 5 of 7