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’
MIN
VCC
VIH
VIL
IOH
IOL
Supply voltage (see Note 1)
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
External resistance between any input and VCC or ground
4.5
2
0.8
–12
48
40
NOM
5
MAX
5.5
MIN
4.75
2
0.8
–15
64
40
SN74S’
NOM
5
MAX
5.25
UNIT
V
V
V
mA
mA
kΩ
TA
Operating free-air temperature (see Note 3)
–55
125
0
70
°C
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
θ
CA, of not more that 40°C/W.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
Hysteresis
(VT+ – VT–)
VCC = MIN,
VCC = MIN
VCC = MIN
IOH = –1 mA
VOH
VCC = MIN,
IOH = –3 mA
VCC = MIN,
IOH = MAX
VOL
IOZH
IOZL
II
IIH
IIL
IOS§
VCC = MIN,
IOL = MAX
VCC = MAX,
VIL = 0.8 V
VCC = MAX,
VIL = 0.8 V
VCC = MAX,
VCC = MAX,
VCC = MAX
MAX,
VCC = MAX
Outputs high
ICC
VCC = MAX,
,
Output open
Outputs low
Out uts
Outputs disabled
’S240
’S241,’S244
’S240
’S241, ’S244
’S240
’S241, ’S244
VIH = 2 V,
VIH = 2 V,
VIH = 2 V,
VIH = 2 V,
VIH = 2 V,
VIH = 2 V,
VI = 5.5 V
VI = 2.7 V
VI = 0 5 V
0.5
Any A
Any G
–50
80
95
100
120
100
120
VIL = 0.8 V,
VIL = 0.8 V,
VIL = 0.5 V,
VIL = 0.8 V,
2.4
2
0.55
50
–50
1
50
–400
–2
–225
123
147
145
170
145
170
–50
80
95
100
120
100
120
3.4
TEST CONDITIONS†
II = –18 mA
0.2
0.4
SN54S’
MIN TYP‡
MAX
–1.2
0.2
2.7
2.4
2
0.55
50
–50
1
50
–400
–2
–225
135
160
150
180
150
180
mA
V
µA
µA
mA
µA
µA
mA
mA
3.4
V
0.4
SN74S’
MIN TYP‡
MAX
–1.2
UNIT
V
V
VO = 2.4 V
VO = 0.5 V
† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
‡ All typical values are at VCC = 5 V, TA = 25°C.
§ Not more than one output should be shorted at a time, and duration of the short-circuit should not exceed one second.
8
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
