SN54173, SN54LS173A, SN74173, SN74LS173A
4-BIT D-TYPE REGISTERS
WITH 3-STATE OUTPUTS
SDLS067A – OCTOBER 1976 – REVISED JUNE 1999
switching characteristics, V
= 5 V, T = 25°C, R = 400 Ω (see Figure 1)
A L
CC
SN54173
TYP
SN74173
TYP
PARAMETER
TEST CONDITIONS
UNIT
MIN
MAX
MIN
MAX
Maximum clock frequency
Propagation delay time,
25
35
25
35
MHz
ns
f
t
max
18
28
19
27
43
31
18
28
19
27
43
31
PHL
high-to-low-level output from clear input
Propagation delay time,
low-to-high-level output from clock input
t
t
PLH
C
= 50 pF
L
ns
Propagation delay time,
high-to-low-level output from clock input
PHL
Output enable time to high level
Output enable time to low level
Output disable time from high level
Output disable time from low level
7
7
3
3
16
21
5
30
30
14
20
7
7
3
3
16
21
5
30
30
14
20
t
t
t
t
PZH
PZL
PHZ
PLZ
ns
ns
C
= 5 pF
L
11
11
6
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