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SN74AC245 Dataheets PDF



Part Number SN74AC245
Manufacturers Texas Instruments
Logo Texas Instruments
Description OCTAL BUS TRANSCEIVERS
Datasheet SN74AC245 DatasheetSN74AC245 Datasheet (PDF)

D 2-V to 6-V VCC Operation D Inputs Accept Voltages to 6 V D Max tpd of 7 ns at 5 V description/ordering information The ’AC245 octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements. When the output-enable (OE) is low, the device passes noninverted data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction control (DIR) input. A h.

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D 2-V to 6-V VCC Operation D Inputs Accept Voltages to 6 V D Max tpd of 7 ns at 5 V description/ordering information The ’AC245 octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements. When the output-enable (OE) is low, the device passes noninverted data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction control (DIR) input. A high on OE disables the device so that the buses are effectively isolated. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. SN54AC245, SN74AC245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCAS461F − FEBRUARY 1995 − REVISED OCTOBER 2003 SN54AC245 . . . J OR W PACKAGE SN74AC245 . . . DB, DW, N, NS, OR PW PACKAGE (TOP VIEW) DIR 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 GND 10 20 VCC 19 OE 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8 SN54AC245 . . . FK PACKAGE (TOP VIEW) OE VCC DIR A1 A2 3 2 1 20 19 A3 4 18 B1 A4 5 17 B2 A5 6 16 B3 A6 7 15 B4 A7 8 14 B5 9 10 11 12 13 B6 B7 B8 GND A8 ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP − N Tube SN74AC245N SN74AC245N SOIC − DW Tube Tape and reel SN74AC245DW SN74AC245DWR AC245 −40°C to 85°C SOP − NS SSOP − DB Tape and reel Tape and reel SN74AC245NSR SN74AC245DBR AC245 AC245 TSSOP − PW CDIP − J Tube Tape and reel Tube SN74AC245PW SN74AC245PWR SNJ54AC245J AC245 SNJ54AC245J −55°C to 125°C CFP − W Tube SNJ54AC245W SNJ54AC245W LCCC − FK Tube SNJ54AC245FK SNJ54AC245FK † 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. 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. • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 Copyright © 2003, Texas Instruments Incorporated 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. 1 SN54AC245, SN74AC245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCAS461F − FEBRUARY 1995 − REVISED OCTOBER 2003 FUNCTION TABLE INPUTS OE DIR OPERATION L L B data to A bus L H A data to B bus H X Isolation logic diagram (positive logic) 1 DIR 2 A1 19 OE 18 B1 To Seven Other Channels absolute maximum ratings over operating.


SN54AC245 SN74AC245 SN74AC245N


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