Használati útmutató Texas Instruments SN74AHC244DWR

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SN54AHC244

SN74AHC244

SCLS226K – OCTO BER 1995 – REVISED JULY 2014

SNx4AHC244 Octal Buers/Drivers With 3-State Outputs

1 Features 3 Description

These octal buers and drivers are designed

1 • Operating Range 2-V to 5.5-V VCC specically to improve the performance and density of

• Latch-Up Performance Exceeds 250 mA Per 3-state memory-address drivers, clock drivers, and

JESD 17 bus-oriented receivers and transmitters.

• On Products Compliant to MIL-PRF-38535,

Device Information(1)

All Parameters Are Tested Unless Otherwise

Noted. On All Other Products, Production PART NUMBER PACKAGE BODY SIZE ( NOM)

Processing Does Not Necessarily Include Testing SSOP (20) 7.20 mm × 5.30 mm

of All Parameters. SOIC (20) 12.8 0 mm × 7.50 mm

SNx4AHC244 PDIP (20) 24.3 3 mm × 6.35 mm

2 Applications TSSOP (20) 12.6 0 mm × 5.30 mm

• Network Switches VQFN (20) 4.50 mm × 3.50 mm

• Power Infrastructures (1) For all ava ilable packages, see the orderable addendum at

the end of the data sheet.

• PCs and Notebooks

• Wearable Health and Fitness Devices

• Tests and Measurements

4 Simpli ed Schematic

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

inte llectual property matters and other important discl aimers. PRODUCTION DATA.

SN54AHC244

SN74AHC244

SCLS226K – OCTO BER 1995 – REVISED JULY 2014

www.ti.com

Table of Contents

1 Features 9 Detailed Description.................................................................. 1.............................................. 9

9.1 Overview ................................................................... 9

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

9.2 Functi on al Block Diagram ......................................... 9

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

9.3 Feature Desc rip tio n................................................... 9

4 Simplied Schematic............................................. 1

9.4 Device Functional Modes.......................................... 9

5 Revision History..................................................... 2 10 Application and Implementation........................ 10

6 Pin Conguration and Functions ......................... 3 10.1 Application Information.......................................... 10

7 Specications......................................................... 4 10.2 Typical Application ............................................... 10

7.1 Absolute Maximum Rating s ...................................... 4 11 Power Supply Recommendations ..................... 11

7.2 Handling Ratings....................................................... 4 12 Layout................................................................... 11

7.3 Recommended Operating Conditions ....................... 4

12.1 Layout Guidelines ................................................. 11

7.4 Thermal Information.................................................. 5

12.2 Layout Example .................................................... 11

7.5 Electrical Characteristics........................................... 5

13 Device and Documentation Support ................. 12

7.6 Switching Characteristics.......................................... 6

13.1 Related Links ........................................................ 12

7.7 Switching Characteristics.......................................... 6

13 .2 Trademarks ........................................................... 12

7.8 Noise Characteristics ................................................ 7

13.3 Electrostatic Discharge Caution..................... ....... 12

7.9 Operating Characteristics.......................................... 7

13 .4 Gloss ary ................................................................ 12

7.10 Typical Characteristics ............................................ 7

14 Mec hanica l, Packaging, and Orderable

8 Parameter Measurement Information .................. 8 Information ........................................................... 12

5 Revision History

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

Changes from Revision J (July 2003) to Revision K Page

• Updated document to ne w TI data sheet fo rmat. ................................................................................................................... 1

• Removed Ordering Information table. .................................................................................................................................... 1

• Added Military Disclaimer to Features list. ............................................................................................................................ 1

• Added Applications. ............................................................................................................................................................... 1

• Added Pin Functions table...................................................................................................................................................... 3

• Added Handling Ratings table. ............................................................................................................................................... 4

• Changed MAX ambient temperature in Recommended Operating Conditions table. ........................................................... 4

• Added Thermal Information table. .......................................................................................................................................... 5

• Added Typical Characteristics. .............................................................................................................................................. 7