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SN74BCT640DWRE4 Scheda tecnica(PDF) 1 Page - Texas Instruments |
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SN74BCT640DWRE4 Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 12 page SN54BCT640, SN74BCT640 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS025C – SEPTEMBER 1988 – REVISED APRIL 1994 Copyright © 1994, Texas Instruments Incorporated 2–1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 • State-of-the-Art BiCMOS Design Substantially Reduces Standby Current • Outputs Have Undershoot-Protection Circuitry • Power-Up High-Impedance State • Buffered Control Inputs to Reduce DC Loading Effects • ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015 • Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK) and Flatpacks (W), and Plastic and Ceramic 300-mil DIPs (J, N) description The ′BCT640 bus transceiver is designed for asynchronous 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 that the buses are effectively isolated. The SN54BCT640 is characterized for operation over the full military temperature range of – 55 °C to 125 °C. The SN74BCT640 is characterized for operation from 0 °C to 70°C. FUNCTION TABLE INPUTS OPERATION OE DIR OPERATION L L B data to A bus L HA data to B bus H X Isolation 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 SN54BCT640 ...J OR W PACKAGE SN74BCT640 . . . DW OR N PACKAGE (TOP VIEW) 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 SN54BCT640 . . . FK PACKAGE (TOP VIEW) 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. |
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