Texas Instruments SN74LS241DW Bedienungsanleitung

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

On products compliant to MIL-PRF-38535, all parameters are

tested unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.

SN54LS240

SN54LS241

SN54LS244

SN54S240

SN54S241

SN54S244

SN74LS240

SN74LS241

SN74LS244

SN74S240

SN74S241

SN74S244

SDLS144D –APRIL 1985– REVISED OCTOBER 2016

SNx4LS24x, SNx4S24x Octal Buers and Line Drivers With 3-State Outputs

1 Features

• Inputs Tolerant Down to 2 V, Compatible With

3.3-V or 2.5-V Logic Inputs

• Maximum tpd of 15 ns at 5 V

• 3-State Outputs Drive Bus Lines or Buer Memory

Address Registers

• PNP Inputs Reduce DC Loading

• Hysteresis at Inputs Improves Noise Margins

2 Applications

• Servers

• LED Displays

• Network Switches

• Telecom Infrastructure

• Motor Drivers

• I/O Expanders

3 Description

The SNx4LS24x, SNx4S24x octal buers and line

drivers are designed specically to improve both the

performance and density of three-state memory

address drivers, clock drivers, and bus-oriented

receivers and transmitters. The designer has a choice

of selected combinations of inverting and non-

inverting outputs, symmetrical, active-low output-

control (G) inputs, and complementary output-control

(G and G) inputs. These devices feature high fan-out,

improved fan-in, and 400-mV noise margin. The

SN74LS24x and SN74S24x devices can be used to

drive terminated lines down to 133 .Ω

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)

SN54LS24x,

SN54S24x

CDIP (20) – J 24.20 mm × 6.92 mm

CFP (20) – W 7.02 mm × 13.72 mm

LCCC (20) – FK 8.89 mm × 8.89 mm

SN74LS240,

SN74LS244 SSOP (20) – DB 7.20 mm × 5.30 mm

SN74LS24x,

SN74S24x

SOIC (20) – DW 12.80 mm × 7.50 mm

PDIP (20) – N 24.33 mm × 6.35 mm

SN74LS24x SOP (20) – NS 7.80 mm × 12.60 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Logic Diagram (Positive Logic)

SN54LS240

SN54LS241

SN54LS244

SN54S240

SN54S241

SN54S244

SN74LS240

SN74LS241

SN74LS244

SN74S240

SN74S241

SN74S244

SDLS144D – APRIL 1985 – REVISED OCTOBER 2016

www.ti.com

Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240

SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244

Table of Contents

1 Features .................................................................. 1

2 Applications ........................................................... 1

3 Description ............................................................. 1

4 Revision History..................................................... 2

5 Pin Conguration and Functions ......................... 3

6 Specications......................................................... 4

6.1 Absolute Maximum Ratings ...................................... 4

6.2 ESD Ratings.............................................................. 4

6.3 Recommended Operating Conditions....................... 4

6.4 Thermal Information ................................................. 5

6.5 Electrical Characteristics – SNx4LS24x.................... 5

6.6 Electrical Characteristics – SNx4S24x...................... 5

6.7 Switching Characteristics – SNx4LS24x ................... 6

6.8 Switching Characteristics – SNx4S24x..................... 6

6.9 Typical Characteristics.............................................. 7

7 Parameter Measurement Information .................. 7

7.1 SN54LS24x and SN74LS24x Devices...................... 7

7.2 SN54S24x and SN74S24x Devices.......................... 9

8 Detailed Description ............................................ 11

8.1 Overview ................................................................. 11

8.2 Functional Block Diagrams ..................................... 11

8.3 Feature Description................................................. 12

8.4 Device Functional Modes........................................ 12

9 Application and Implementation ........................ 14

9.1 Application Information............................................ 14

9.2 Typical Application .................................................. 14

9.3 System Examples ................................................... 15

10 Power Supply Recommendations ..................... 17

11 Layout................................................................... 17

11.1 Layout Guidelines ................................................. 17

11.2 Layout Example .................................................... 17

12 Device and Documentation Support ................. 18

12.1 Related Links ........................................................ 18

12.2 Receiving Notication of Documentation Updates 18

12.3 Community Resource............................................ 18

12.4 Trademarks ........................................................... 18

12.5 Electrostatic Discharge Caution............................ 18

12.6 Glossary ................................................................ 18

13 Mechanical, Packaging, and Orderable

Information ........................................................... 19

4 Revision History

NOTE: Page numbers for previous revisions may dier from page numbers in the current version.

Changes from Revision C (May 2010) to Revision D Page

• Added section, table, section, ,Applications ESD Ratings Feature Description Device Functional Modes Application

and Implementation Power Supply Recommendations Layout Device and Documentationsection, section, section,

Support Mechanical, Packaging, and Orderable Informationsection, and section................................................................ 1

• Deleted Ordering Information table; see POA at the end of the data sheet........................................................................... 1

• Changed RθJA values in the table from 70 to 94.3 (DB), from 58 to 90.3 (DW), from 69 to 50.6Thermal Information

(N), and from 60 to 76.6 (NS)................................................................................................................................................. 5