Datasheet

SN74ALS990
8-BIT D-TYPE TRANSPARENT READ-BACK LATCH
SDAS027B – APRIL 1984 – REVISED JANUARY 1995
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 4.5 V to 5.5 V,
C
L
= 50 pF,
T
A
= MIN to MAX
†
UNIT
()
()
MIN MAX
t
PLH
D
Q
4 17
ns
t
PHL
D
Q
5 24
ns
t
PLH
LE
Q
6 26
ns
t
PHL
LE
Q
8 26
ns
t
en
‡
OERB D
4 21 ns
t
dis
§
OERB D
4 19 ns
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
‡
t
en
= t
PZH
or t
PZL
§
t
dis
= t
PHZ
or t
PLZ