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SN54HC640W Datasheet(PDF) 1 Page - Texas Instruments |
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SN54HC640W Datasheet(HTML) 1 Page - Texas Instruments |
1 / 7 page SN54HC640, SN74HC640 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS303A – JANUARY 1996 – REVISED MAY 1997 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Inverting Logic D High-Current 3-State Outputs Can Drive up to 15 LSTTL Loads D Package Options Include Plastic Small-Outline (DW) and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs description These octal bus transceivers are designed for asynchronous two-way communication between data buses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus, depending upon the level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are effectively isolated. The SN54HC640 is characterized for operation over the full military temperature range of –55 °C to 125 °C. The SN74HC640 is characterized for operation from –40 °C to 85°C. FUNCTION TABLE INPUTS OPERATION OE DIR OPERATION L L B data to A bus L HA data to B bus H X Isolation Copyright © 1997, Texas Instruments Incorporated 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. 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. SN54HC640 ...J OR W PACKAGE SN74HC640 . . . DW OR N PACKAGE (TOP VIEW) SN54HC640 . . . FK PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 DIR A1 A2 A3 A4 A5 A6 A7 A8 GND VCC OE B1 B2 B3 B4 B5 B6 B7 B8 32 1 20 19 9 10 11 12 13 4 5 6 7 8 18 17 16 15 14 B1 B2 B3 B4 B5 A3 A4 A5 A6 A7 |
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