SN75138N Datasheet | Texas Instruments

description The SN55138 and SN75138 quadruple bus transceivers are designed for two-way data munication over single-ended transmission lines. Each of the four identical channels consists of a driver with TTL inputs and a receiver with a TTL output. The driver open-collector output is designed to handle loads up to 100-m A open collector. The receiver input is internally connected to the driver output, and has a high impedance to minimize loading of the transmission line. Because of the high driveroutput current and the high receiver-input impedance, a very large number (typically hundreds) of transceivers may be connected to a single data bus. SN55138 . . . FK PACKAGE (TOP VIEW) 1B GND NC VCC 4B 1R 3 2 1 20 19 4R 1D 5 17 4D NC 6 16 NC 2D 7 15 S 2R 8 14 3D 9 10 11 12 13 2B GND NC 3B 3R - No internal connection The receiver design also features a threshold of 2.3 V (typical), providing a wider noise margin than would be possible with a receiver having the usual TTL threshold. A strobe turns off all drivers (high impedance) but does not affect receiver operation. These circuits are designed for operation from a single 5-V supply and include a provision to minimize loading of the data bus when the power-supply voltage is zero. The SN55138 is characterized for operation over the full military temperature range of - 55°C to 125°C. The SN75138 is characterized for operation from 0°C to 70°C. 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 © 1995, Texas Instruments Incorporated 1 SN55138,...