Details, datasheet, quote on part number: SN74ALS245AN3
CategoryLogic => Transceivers => Standard Transceivers
TitleStandard Transceivers
Descriptionti SN74ALS245A, Octal Bus Transceivers With 3-State Outputs
CompanyTexas Instruments, Inc.
DatasheetDownload SN74ALS245AN3 datasheet
Cross ref.Similar parts: DM74ALS245A, DM74ALS245AN, DM74ALS5245N
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Features, Applications


3-State Outputs Drive Bus Lines Directly pnp Inputs Reduce dc Loading

TA PACKAGE ORDERABLE PART NUMBER SN74ALS245A-1N PDIP N Tube Tape and reel to 70C SOIC DW Tube Tape and reel Tube Tape and reel Tape and reel SOP NS SSOP DB CDIP to 125C CFP W LCCC FK Tape and reel Tape and reel Tape and reel Tube SNJ54ALS245AFK SNJ54AS245FK TOP-SIDE MARKING SNJ54ALS245AFK SNJ54AS245FK

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.

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.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements. The devices allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so that the buses are effectively isolated. The -1 version of the SN74ALS245A is identical to the standard version, except that the recommended maximum IOL is increased to 48 mA. There no -1 version of the SN54ALS245A.

FUNCTION TABLE INPUTS L H DIR H X OPERATION B data to A bus A data to B bus Isolation
logic diagram, each gate (positive logic)

absolute maximum ratings over operating free-air temperature range (SN54ALS245A, SN74ALS245A) (unless otherwise noted)

Supply voltage, VCC. 7 V Input voltage, VI: All inputs. 7 V I/O ports. 5.5 V Package thermal impedance, JA (see Note 1): DB package. 70C/W DW package. 58C/W N package. 69C/W NS package. 60C/W Storage temperature range. to 150C

Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: The package thermal impedance is calculated in accordance with JESD 51-7.

SN54ALS245A MIN VCC VIH VIL IOH IOL Supply voltage High-level input voltage Low-level input voltage High-level output current Low level output current Low-level NOM 5 MAX 5.5 SN74ALS245A MIN NOM 5 MAX 5.5 UNIT V mA

TA Operating free-air temperature C Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V NOTE 2: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004.

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

Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V All typical values are VCC 25C. For I/O ports, the parameters IIH and IIL include the off-state output current. The output conditions have been chosen to produce a current that closely approximates one-half of the true short-circuit output current, IOS.


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