SN751178 Datasheet | Texas Instruments

SN751177, SN751178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS059D - FEBRUARY 1990 - REVISED MAY 1999 D Meet or Exceed the Requirements of ANSI Standards TIA/EIA-422-B and TIA/EIA-485-A and ITU Remendations V.10 and V.11 D Designed for Multipoint Bus Transmission on Long Bus Lines in Noise Environments D Driver Positive- and Negative-Current Limiting D Thermal Shutdown Protection D Driver 3-State Outputs D Receiver mon-Mode Input Voltage Range of - 12 V to 12 V D Receiver Input Sensitivity . . . ±200 m V D Receiver Hysteresis . . . 50 m V Typ D Receiver Input Impedance . . . 12 kΩ Min D Receiver 3-State Outputs (SN751177 Only) D Operate From Single 5-V Supply description The SN751177 and SN751178 dual differential drivers and receivers are monolithic integrated circuits that are designed for balanced multipoint bus transmission at rates up to 10 Mbit/s. They are designed to improve the performance of full-duplex data munications over long bus lines and meet ANSI Standards TIA/EIA-422-B and TIA/EIA-485-A and ITU Remendations V.10 and V.11. SN751177 . . . N OR NS† PACKAGE (TOP VIEW) 1B 1 1A 2 1R 3 RE 4 2R 5 2A 6 2B 7 GND 8 16 VCC 15 1D 14 1Y 13 1Z 12 DE 11 2Z 10 2Y 9 2D SN751178 . . . N OR NS† PACKAGE (TOP VIEW) 1B 1 1A 2 1R 3 1DE 4 2R 5 2A 6 2B 7 GND 8 16 VCC 15 1D 14 1Y 13 1Z 12 2DE 11 2Z 10 2Y 9 2D † The NS package is only available taped and reeled. The SN751177 and SN751178 driver outputs provide limiting for both positive and negative currents and thermal-shutdown protection from line-fault conditions on the transmission bus line. The receiver Features high input impedance of at least 12 kΩ, an input sensitivity of ±200 m V over a mon-mode input voltage range of - 12 V to 12 V, and typical input hysteresis of 50 m V. Fail-safe design ensures that if the receiver inputs are open, the receiver outputs always will be high. The SN751177 and SN751178 are characterized for operation from - 20°C to 85°C. Please be aware that an important notice...