4

SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244

SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244

SDLS144D – APRIL 1985 – REVISED OCTOBER 2016

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Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240

SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244

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Copyright © 1985–2016, Texas Instruments Incorporated

(1)

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings

only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended

Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2)

Voltage values are with respect to network ground terminal.

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)

(1)

MIN

MAX

UNIT

Supply voltage, VCC

(2)

7

V

Input voltage, VI

SNx4LS24x

7

V

SNx4S24x

5.5

Off-state output voltage

5.5

V

Storage temperature, Tstg

–65

150

°C

(1)

JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2)

JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.2 ESD Ratings

VALUE

UNIT

ALL PACKAGES

V(ESD)

Electrostatic discharge

Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1)

500

V

N PACKAGE

V(ESD)

Electrostatic discharge

Charged device model (CDM), per JEDEC specification JESD22-C101(2)

500

V

(1)

Voltage values are with respect to network ground terminal.

(2)

An SN54S241J operating at free-air temperature above 116°C requires a heat sink that provides a thermal resistance from case to free

air, RθCA, of not more that 40°C/W.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

MIN

NOM

MAX

UNIT

VCC

Supply voltage(1)

SN54xS24x

4.5

5

5.5

V

SN74xS24x

4.75

5

5.25

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

SN54LS24x

0.7

V

SN54S24x, SN74xS24x

0.8

IOH

High-level output current

SN54xS24x

–12

mA

SN74xS24x

–15

IOL

Low-level output current

SN54LS24x

12

mA

SN54S24x

48

SN74LS24x

24

SN74S24x

64

External resistance between any input and VCC or ground (SNx4S24x only)

40

kΩ

TA

Operating free-air temperature(2)

SN54xS24x

–55

125

°C

SN74xS24x

0

70