SN75177B Datasheet | Texas Instruments

description SLLS002C - D2606, JULY 1985 - REVISED FEBRUARY 1993 SN75177B . . . D OR P PACKAGE (TOP VIEW) VCC T 1 2 3 4 8A 7B 6Z 5Y SN75178B . . . P PACKAGE (TOP VIEW) VCC T 1 2 3 4 8A 7B 6Z 5Y THE SN75177B IS NOT REMENDED FOR NEW DESIGN The SN75177B and SN75178B differential bus repeaters are monolithic integrated devices each designed for one-way data munication on multipoint bus transmission lines. These devices are designed for balanced transmission bus line applications and meet EIA Standard RS-422-A and RS-485 and CCITT Remendations V.11 and X.27. Each device is designed to improve the performance of the data munication over long bus lines. The SN75177B and SN75178B are identical except for the plementary enable inputs, which allow the devices to be used in pairs for bidirectional munication. The SN75177B and SN75178B feature positive- and negative-current limiting 3-state outputs for the receiver and driver. The receiver features high input impedance, input hysteresis for increased noise immunity, and input sensitivity of ± 200 m V over a mon-mode input voltage range of - 7 V to 12 V. The driver features thermal shutdown for protection from line fault conditions. Thermal shutdown is designed to occur at a junction temperature of approximately 150°C. The driver is designed to drive current loads up to 60 m A maximum. The SN75177B and SN75178B are designed for optimum performance when used on transmission buses employing the SN75172 and SN75174 differential line drivers, SN75173 and SN75175 differential line receivers, or SN75176B bus transceiver. Function Tables DIFFERENTIAL INPUTS A- B VID ≥ 0.2 V - 0.2 V < VID < 0.2 V VID ≤ 0.2 V X SN75177B ENABLE EN H H H L OUTPUTS TYZ HH L ??? L LH ZZZ SN75178B DIFFERENTIAL INPUTS ENABLE OUTPUTS A- B EN T Y Z VID ≥ 0.2 V - 0.2 V < VID < 0.2 V VID ≤ 0.2 V X L HHL L ??? L LLH H...