Datasheet

SN54ALS138A, SN54AS138, SN74ALS138A, SN74AS138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDAS055E – APRIL 1982 – REVISED JULY 1996
6
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,
R
L
= 500 Ω
,
T
A
= MIN to MAX
†
UNIT
(INPUT)
(OUTPUT)
SN54AS138 SN74AS138
MIN MAX MIN MAX
t
PLH
ABC
Any Y
2 11 2 10
ns
t
PHL
A
,
B
,
C
An
y
Y
2 11 2 9.5
ns
t
PLH
G1
Any Y
2 11.5 2 10
ns
t
PHL
G1
An
y
Y
2 11 2 10
ns
t
PLH
G2
Any Y
2 9 2 7.5
ns
t
PHL
G2
An
y
Y
2 10 2 8.5
ns
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.