Texas Instruments SN54LS245, SN74LS245 Octal Bus Transceivers with 3-State Outputs: Data Manual/Owner's Guide

查询5962-8002101VRA供应商 SN54LS245, SN74LS245

OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDLS146A – OCTOBER 1976 – REVISED FEBRUARY 2002 3-State Outputs Drive Bus Lines Directly SN54LS245 J OR W PACKAGE

SN74LS245 DB, DW, N, OR NS PACKAGE

PNP Inputs Reduce dc Loading on Bus

(TOP VIEW)

Lines Hysteresis at Bus Inputs Improves Noise DIR VCC Margins A1 OE

Typical Propagation Delay Times Port to A2 B1 Port, 8 ns A3 B2 A4 B3 A5 B4

IOL IOH TYPE (SINK (SOURCE A6 B5 CURRENT) CURRENT)

SN54LS245 12 m A –12 m A A8 B7

SN74LS245 24 m A –15 m A GND B8

description SN54LS245 FK PACKAGE (TOP VIEW)

These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements.

A3 B1 The devices allow data transmission from the A4 B2

A bus to the B bus or from the B bus to the A bus, A5 B3 depending on the logic level at the A6 B4 direction-control (DIR) input. The output-enable A7 B5 (OE) input can disable the device so that the buses are effectively isolated.

ORDERING INFORMATION

ORDERABLE TOP-SIDE IR

TA PACKAGE†

PART NUMBER MARKING

PDIP – N Tube SN74LS245N SN74LS245N

Tube SN74LS245DW

SOIC DW LS245

0°C to 70°C Tape and reel SN74LS245DWR

SOP – NS Tape and reel SN74LS245NSR 74LS245 SSOP – DB Tape and reel SN74LS245DBR LS245

Tube SN54LS245J SN54LS245J

Tube SNJ54LS245J SNJ54LS245J

–55°C to 125°C

CFP – W Tube SNJ54LS245W SNJ54LS245W LCCC – FK Tube SN54LS245FK SN54LS245FK

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Copyright  2002, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments On products compliant to MIL-PRF-38535, all parameters are tested standard warranty. Production processing does not necessarily include unless otherwise noted. On all other products, production testing of all parameters. processing does not necessarily include testing of all parameters.

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