Datasheet

SN54BCT240, SN74BCT240
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS004F – OCTOBER 1987 – REVISED MARCH 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54BCT240 SN74BCT240
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP
†
MAX MIN TYP
†
MAX
UNIT
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.2 –1.2 V
I
OH
= –3 mA 2.4 3.3 2.4 3.3
V
OH
V
CC
= 4.5 V
I
OH
= –12 mA 2 3.2
V
I
OH
= –15 mA 2 3.1
V
OL
V
CC
=45V
I
OL
= 48 mA 0.38 0.55
V
V
OL
V
CC
=
4
.
5
V
I
OL
= 64 mA 0.42 0.55
V
I
I
V
CC
= 5.5 V, V
I
= 7 V 0.1 0.1 mA
I
IH
V
CC
= 5.5 V, V
I
= 2.7 V 20 20 µA
I
IL
V
CC
= 5.5 V, V
I
= 0.5 V –1 –1 mA
I
OZH
V
CC
= 5.5 V, V
O
= 2.7 V 50 50 µA
I
OZL
V
CC
= 5.5 V, V
O
= 0.5 V –50 –50 µA
I
OS
‡
V
CC
= 5.5 V, V
O
= 0 –100 –225 –100 –225 mA
I
CCH
V
CC
= 5.5 V, Outputs open 19 31 19 31 mA
I
CCL
V
CC
= 5.5 V, Outputs open 46 71 46 71 mA
I
CCZ
V
CC
= 5.5 V, Outputs open 6 9 6 9 mA
C
i
V
CC
= 5 V, V
I
= 2.5 V or 0.5 V 6 6 pF
C
o
V
CC
= 5 V, V
O
= 2.5 V or 0.5 V 11 11 pF
†
All typical values are at V
CC
= 5 V.
‡
Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 5 V,
C
L
= 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
T
A
= 25°C
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
’BCT240 SN54BCT240 SN74BCT240
MIN TYP MAX MIN MAX MIN MAX
t
PLH
A
Y
0.5 3.3 4.8 0.5 6.4 0.5 5.6
ns
t
PHL
A
Y
0.4 1.8 3.5 0.4 4.5 0.4 4
ns
t
PZH
OE
Y
1 6.4 7.9 1 9.2 1 8.8
ns
t
PZL
OE
Y
1 7.5 9.4 1 10.8 1 10.5
ns
t
PHZ
OE
Y
1 6 6.8 1 8.5 1 8.1
ns
t
PLZ
OE
Y
1 6.7 8.1 1 10.6 1 9.5
ns
§
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.