Texas Instruments SN65HVD1780/1781/1782 RS-485 Transceivers

Texas Instruments SN65HVD1780/1781/1782 RS-485 Transceivers are designed to survive overvoltage faults such as direct shorts. These direct shorts can be to power supplies, mis-wiring faults, connector failures, cable crushes, and tool mis-applications. The devices are also robust to ESD events with high levels of protection to the human-body-model specification. The SN65HVD1780/1781/1782 devices combine a differential driver and a differential receiver, which operate from a single power supply. In the SN65HVD1782, the driver differential outputs and the receiver differential inputs are connected internally to form a bus port suitable for half-duplex (two-wire bus) communication. This port features a wide common- mode voltage range, making the devices suitable for multi-point applications over long cable runs.

Features

  • Bus-pin fault protection to
    • > ±70V (SN65HVD1780, SN65HVD1781)
    • > ±30V (SN65HVD1782)
  • Operation with 3.3V to 5V supply range
  • ±16kV HBM protection on bus pins
  • Reduced unit load for up to 320 nodes
  • Failsafe receiver for open-circuit, short-circuit, and idle-bus conditions
  • Low power consumption
    • Low standby supply current, 1µA maximum
    • ICC 4mA Quiescent current during operation
  • Pin-compatible with industry-standard SN75176
  • Signaling rates of 115kbps, 1Mbps, and up to 10Mbps

Applications

  • HVAC Networks
  • Security electronics
  • Building automation
  • Telecommunication equipment
  • Motion control
  • Industrial networks

Functional Block Diagram

Block Diagram - Texas Instruments SN65HVD1780/1781/1782 RS-485 Transceivers
Published: 2016-04-13 | Updated: 2022-03-11