SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244
SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDLS144B – APRIL 1985 – REVISED FEBRUARY 2002
recommended operating conditions
SN54S’
SN74S’
UNIT
MIN NOM
MAX
MIN NOM
MAX
V
V
V
Supply voltage (see Note 1)
High-level input voltage
4.5
2
5
5.5
4.75
2
5
5.25
V
V
CC
IH
Low-level input voltage
0.8
–12
48
0.8
–15
64
V
IL
I
High-level output current
mA
mA
kΩ
°C
OH
OL
I
Low-level output current
External resistance between any input and V
or ground
40
40
CC
T
A
Operating free-air temperature (see Note 3)
–55
125
0
70
NOTES: 1. Voltage values are with respect to network ground terminal.
3. An SN54S241J operating at free-air temperature above 116°C requires a heat sink that provides a thermal resistance from case
to free air, R , of not more that 40°C/W.
CA
θ
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54S’
SN74S’
†
PARAMETER
UNIT
TEST CONDITIONS
‡
‡
MIN TYP
MAX
MIN TYP
MAX
V
V
V
V
= MIN,
= MIN
I = –18 mA
–1.2
–1.2
V
V
IK
Hysteresis
(V – V
CC
I
0.2
0.4
3.4
0.2
2.7
2.4
2
0.4
3.4
CC
)
T–
T+
= MIN
= –1 mA
V
IH
V
IH
V
IH
V
IH
V
IH
V
IH
= 2 V,
= 2 V,
= 2 V,
= 2 V,
= 2 V,
= 2 V,
V
= 0.8 V,
= 0.8 V,
= 0.5 V,
= 0.8 V,
CC
OH
IL
IL
IL
IL
I
V
= MIN,
= –3 mA
V
V
V
CC
OH
2.4
2
V
OH
V
I
V
= MIN,
= MAX
CC
OH
I
V
= MIN,
= MAX
CC
V
OL
0.55
50
0.55
50
V
I
OL
V
V
= MAX,
= 0.8 V
CC
IL
I
I
V
V
= 2.4 V
= 0.5 V
µA
µA
OZH
O
V
V
= MAX,
= 0.8 V
CC
IL
–50
–50
OZL
O
I
I
V
= MAX,
= MAX,
V = 5.5 V
1
50
1
50
mA
µA
I
CC
CC
I
V
V = 2.7 V
I
IH
Any A
Any G
–400
–2
–400
–2
µA
I
V
= MAX,
= MAX
V = 0.5 V
I
IL
CC
CC
mA
mA
§
I
V
–50
–225
123
147
145
170
145
170
–50
–225
135
160
150
180
150
180
OS
’S240
80
95
80
95
Outputs high
Outputs low
’S241,’S244
’S240
100
120
100
120
100
120
100
120
V
CC
= MAX,
I
mA
CC
Output open
’S241, ’S244
’S240
Outputs disabled
’S241, ’S244
†
‡
§
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
All typical values are at V = 5 V, T = 25°C.
Not more than one output should be shorted at a time, and duration of the short-circuit should not exceed one second.
CC
A
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
