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DS96177CN Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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DS96177CN Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 8 page DS96177 RS-485/RS-422 Differential Bus Repeater General Description The DS96177 Differential Bus Repeater is a monolithic inte- grated device designed for one-way data communication on multipoint bus transmission lines. This device is designed for balanced transmission bus line applications and meets EIA Standard RS-485 and RS-422A. The device is designed to improve the performance of the data communication over long bus lines. The DS96177 has an active high Enable. The DS96177 features positive and negative current limiting and TRI-STATE® outputs for the receiver and driver. The re- ceiver features high input impedance, input hysteresis for in- creased noise immunity, and input sensitivity of 200 mV over a common mode input voltage range of −12V to +12V. The driver features thermal shutdown for protection from line fault conditions. Thermal shutdown is designed to occur at a junction temperature of approximately 160˚C. The driver is designed to drive current loads up to 60 mA maximum. The DS96177 is designed for optimum performance when used on transmission buses employing the DS96172 and DS96174 differential line drivers, DS96173 and DS96175 differential line receivers, or DS96176 differential bus trans- ceivers. Features n Meets EIA Standard RS-422A and RS-485 n Designed for multipoint transmission on long bus lines in noisy environments n TRI-STATE outputs n Bus voltage range −7.0V to +12V n Positive and negative current limiting n Driver output capability ±60 mA max n Driver thermal shutdown protection n Receiver input high impedance n Receiver input sensitivity of ±200 mV n Receiver input hysteresis of 50 mV typical n Operates from single 5.0V supply n Low power requirements Connection Diagram Function Table Differential Inputs Enable Outputs A–B E TYZ V ID ≥ 0.2V H H H L V ID ≤ −0.2V H L L H X L ZZZ Note: T is an output pin only, monitoring the BUS (RO). H = High Level L = Low Level X = Immaterial Z = High Impedance (off) TRI-STATE® is a registered trademark of National Semiconductor Corporation. 8-Lead Dual-In-Line Package DS009644-1 Top View Order Number DS96177CN See NS Package Number N08E October 1993 © 1999 National Semiconductor Corporation DS009644 www.national.com |
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