Datasheet

SN74ALS992
9-BIT D-TYPE TRANSPARENT READ-BACK LATCH
WITH 3-STATE OUTPUTS
SDAS028B – APRIL 1984 – REVISED JANUARY 1995
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
MIN NOM MAX UNIT
V
CC
Supply voltage 4.5 5 5.5 V
V
IH
High-level input voltage 2 V
V
IL
Low-level input voltage 0.8 V
I
OH
High level out
p
ut current
Q –2.6
mA
I
OH
High
-
le
v
el
o
u
tp
u
t
c
u
rrent
D –0.4
mA
I
OL
Low level out
p
ut current
Q 24
mA
I
OL
Lo
w-
le
v
el
o
u
tp
u
t
c
u
rrent
D 8
mA
t
Pulse duration
LE high 10
ns
t
w
P
u
lse
d
u
ration
CLR low 10
ns
t
Setu
p
time
Data before LE↓ 10
ns
t
su
Set
u
p
time
Data before OERB↓ 10
ns
t
h
Hold time, data after LE↓ 5 ns
T
A
Operating free-air temperature 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP
†
MAX UNIT
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.2 V
V
All outputs V
CC
= 4.5 V to 5.5 V, I
OH
= – 0.4 mA V
CC
–2
V
V
OH
Q
V
CC
= 4.5 V, I
OH
= – 2.6 mA 2.4 3.2
V
D
V
CC
=45V
I
OL
= 4 mA 0.25 0.4
V
OL
D
V
CC
=
4
.
5
V
I
OL
= 8 mA 0.35 0.5
V
V
OL
Q
V
CC
=45V
I
OL
= 12 mA 0.25 0.4
V
Q
V
CC
=
4
.
5
V
I
OL
= 24 mA 0.35 0.5
I
OZH
Q V
CC
= 5.5 V, V
O
= 2.7 V 20 µA
I
OZL
Q V
CC
= 5.5 V, V
O
= 0.4 V –20 µA
I
I
D inputs
V
CC
=55V
V
I
= 5.5 V 0.1
mA
I
I
All others
V
CC
=
5
.
5
V
V
I
= 7 V 0.1
mA
I
D inputs
‡
V
CC
=55V
V
I
=27V
20
µA
I
IH
All others
V
CC
=
5
.
5
V
,
V
I
=
2
.
7
V
20
µ
A
I
D inputs
‡
V
CC
=55V
V
I
=04V
–0.1
mA
I
IL
All others
V
CC
=
5
.
5
V
,
V
I
=
0
.
4
V
–0.1
mA
I
O
§
V
CC
= 5.5 V, V
O
= 2.25 V –30 –112 mA
V55V
Outputs high 30 50
I
CC
V
CC
=
5
.
5
V
,
OERB high
Outputs low 50 80
mA
OERB
high
Outputs disabled 35 55
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.
‡
For I/O ports (Q
A
thru Q
H
), the parameters I
IH
and I
IL
include the off-state output current.
§
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
OS
.