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SN74BCT25642NTE4 Folha de dados(PDF) 1 Page - Texas Instruments |
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SN74BCT25642NTE4 Folha de dados(HTML) 1 Page - Texas Instruments |
1 / 10 page SN74BCT25642 25 Ω OCTAL BUS TRANSCEIVER SCBS047C − DECEMBER 1989 − REVISED NOVEMBER 1993 Copyright 1993, 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 • The A Port Features Open-Collector Outputs That Provide 188-mA IOL to Allow for Heavy DC Loading on Open-Collector Outputs • Eliminates Need for 3-State Overlap Protection on A Ports • Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic 300-mil DIPs (NT) description This 25- Ω octal bus transceiver is designed for asynchronous communication between data buses. The device transmits 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 SN74BCT25642 is capable of sinking 188-mA IOL (A port), which facilitates switching 25-Ω transmission lines on the incident wave. It is designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented transceivers. The distributed VCC and GND pins minimize the noise generated by the simultaneous switching of the outputs. The SN74BCT25642 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 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 DW OR NT 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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