Datasheet

SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244
SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDLS144C − APRIL 1985 − REVISED MAY 2010
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
†
SN54LS’ SN74LS’
UNIT
PARAMETER
TEST CONDITIONS
†
MIN TYP
‡
MAX MIN TYP
‡
MAX
UNIT
V
IK
V
CC
= MIN, I
I
= −18 mA −1.5 −1.5 V
Hysteresis
(V
T+
− V
T−
)
V
CC
= MIN 0.2 0.4 0.2 0.4 V
V
V
CC
= MIN,
I
OH
= −3 mA
V
IH
= 2 V, V
IL
= MAX, 2.4 3.4 2.4 3.4
V
V
OH
V
CC
= MIN,
I
OH
= MAX
V
IH
= 2 V, V
IL
= 0.5 V, 2 2
V
V
V
CC
= MIN,
V 2V
I
OL
= 12 mA 0.4 0.4
V
V
OL
V
CC
=
MIN
,
V
IL
= MAX
V
IH
= 2 V,
I
OL
= 24 mA 0.5
V
I
OZH
V
CC
= MAX,
V
IL
= MAX
V
IH
= 2 V, V
O
= 2.7 V 20 20 µA
I
OZL
V
CC
= MAX,
V
IL
= MAX
V
IH
= 2 V, V
O
= 0.4 V −20 −20 µA
I
I
V
CC
= MAX, V
I
= 7 V 0.1 0.1 mA
I
IH
V
CC
= MAX, V
I
= 2.7 V 20 20 µA
I
IL
V
CC
= MAX, V
IL
= 0.4 V −0.2 −0.2 mA
I
OS
§
V
CC
= MAX, −40 −225 −40 −225 mA
Outputs high All 17 27 17 27
V MAX
Outputs low
’LS240 26 44 26 44
I
CC
V
CC
= MAX,
Output open
Outputs low
’LS241, ’LS244 27 46 27 46
mA
I
CC
O
u
t
pu
t
open
Outputs disabled
’LS240 29 50 29 50
mA
Outputs disabled
’LS241, ’LS244 32 54 32 54
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
‡
All typical values are at V
CC
= 5 V, T
A
= 25°C.
§
Not more than one output should be shorted at a time, and duration of the short-circuit should not exceed one second.
switching characteristics, V
CC
= 5 V, T
A
= 25°C (see Figure 1)
PARAMETER
TEST CONDITIONS
’LS240 ’LS241, ’LS244
UNIT
PARAMETER TEST CONDITIONS
MIN TYP MAX MIN TYP MAX
UNIT
t
PLH
R 667 Ω
C 45 pF
9 14 12 18
ns
t
PHL
R
L
= 667 Ω,
C
L
= 45 pF
12 18 12 18
ns
t
PZL
R 667 Ω
C 45 F
20 30 20 30
ns
t
PZH
R
L
= 667 Ω,
C
L
= 45 pF
15 23 15 23
ns
t
PLZ
R 667 Ω
C 5pF
10 20 10 20
ns
t
PHZ
R
L
= 667 Ω, C
L
= 5 pF
15 25 15 25
ns