Datasheet

SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SDAS214E – DECEMBER 1982 – REVISED AUGUST 2002
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,
R1 = 500 Ω,
R2 = 500 Ω,
T
A
= MIN to MAX
†
UNIT
SN54AS240A SN74AS240A
MIN MAX MIN MAX
t
PLH
A
Y
1 7 1 6.5
ns
t
PHL
A
Y
1.2 6.5 1.2 6.5
ns
t
PZH
OE
Y
1 7 1 6.4
ns
t
PZL
OE
Y
1.1 9.5 1.1 9
ns
t
PHZ
OE
Y
1.2 5.5 1.2 5
ns
t
PLZ
OE
Y
1.5 12.5 1.5 9.5
ns
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.