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SN74BCT25245 Datasheet(PDF) 1 Page - Texas Instruments |
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SN74BCT25245 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 5 page SN54BCT25245, SN74BCT25245 25 Ω OCTAL BUS TRANSCEIVERS WITH 3STATE OUTPUTS SCBS053B − MAY 1990 − REVISED APRIL 1994 Copyright 1994, Texas Instruments Incorporated 2−1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 • State-of-the-Art BiCMOS Design Significantly Reduces ICCZ • ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) • Designed to Facilitate Incident-Wave Switching for Line Impedances of 25 Ω or Greater • Distributed V CC and GND Pins Minimize Noise Generated by the Simultaneous Switching of Outputs • Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK) and Flatpacks (W), and Standard Plastic and Ceramic 300-mil DIPs (JT, NT) description The ′BCT25245 is a 25-Ω octal bus transceiver designed for asynchronous communication between data buses. It improves both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented transceivers. The device allows 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 disable the device so that both buses are effectively isolated. These transceivers are capable of sinking 188-mA IOL, which facilitates switching 25-Ω transmission lines on the incident wave. The distributed VCC and GND pins minimize switching noise for more reliable system operation. The SN54BCT25245 is characterized for opera- tion over the full military temperature range of −55 °C to 125°C. The SN74BCT25245 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 H A data to B bus H X Isolation 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 A1 GND A2 A3 GND A4 A5 GND A6 A7 GND A8 DIR B1 B2 VCC B3 B4 B5 B6 VCC B7 B8 OE SN54BCT25245 . . . JT OR W PACKAGE SN74BCT25245 . . . DW OR NT PACKAGE (TOP VIEW) 32 1 28 27 12 13 5 6 7 8 9 10 11 25 24 23 22 21 20 19 OE A8 GND NC A7 A6 GND B3 VCC B2 NC B1 DIR A1 426 14 15 16 17 18 SN54BCT25245 . . . FK PACKAGE (TOP VIEW) NC − No internal connection UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information 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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