Datasheet

SN54F138, SN74F138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDFS051B – MARCH 1987 – REVISED JULY 1996
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics (see Note 3)
PARAMETER
FROM
(
INPUT
)
TO
(
OUTPUT
)
V
CC
= 5 V,
C
L
= 50 PF,
R
L
= 500 Ω,
T
A
= 25°C
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)
′F138 SN54F138 SN74F138
MIN TYP MAX MIN MAX MIN MAX
t
PLH
ABorC
Y
2.7 5.2 7.5 2.7 12 2.7 8.5
ns
t
PHL
A
,
B
,
or
C
Y
3.2 5.7 8 3.2 9.5 3.2 9
ns
t
PLH
G2A or G2B
Y
2.7 5 7 2.7 11 2.7 8
ns
t
PHL
G2A
or
G2B
Y
2.2 4.9 7 2.2 8 2.2 7.5
ns
t
PLH
G1
Y
3.2 5.8 8 3.2 12.5 3.2 9
ns
t
PHL
G1
Y
2.7 5.2 7.5 2.7 8.5 2.7 8.5
ns
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 3: Load circuits and waveforms are shown in Section 1.