Texas Instruments THVD1400/THVD1420 RS-485 Transceivers

Texas Instruments THVD1400/THVD1420 RS-485 Transceivers are robust half-duplex RS-485 transceivers for industrial applications. The bus pins are immune to high levels of IEC Contact Discharge ESD events, eliminating the need for additional system-level protection components. The devices operate from a single 3V to 5.5V supply. The wide common-mode voltage range and low input leakage on bus pins make the devices suitable for multi-point applications over long cable runs. Texas Instruments THVD1400 and THVD1420 are available in an industry-standard, 8-pin SOIC package for drop-in compatibility, as well as in the industry-leading small SOT package. The devices are characterized for ambient temperatures from –40°C to 125°C.

Features

  • Meets or exceeds the requirements of the TIA/EIA-485A standard
  • 3V to 5.5V supply voltage
  • Half-duplex RS-422/RS-485
  • Data rates
    • THVD1400 - 500kbps
    • THVD1420 - 12Mbps
  • Bus I/O protection
    • ±16kV HBM ESD
    • ±8kV IEC 61000-4-2 Contact discharge
    • ±15kV IEC 61000-4-2 Air gap discharge
    • ±4kV IEC 61000-4-4 Fast transient burst
    • ±16V bus fault protection (absolute max voltage on bus pins)
  • Small, space-saving 8-pin SOT package option (2.1mm x 1.2mm)
  • -40°C to 125°C extended industrial temperature range
  • Large receiver hysteresis for noise rejection
  • Low power consumption
    • < 1µA low standby supply current
    • 1.5mA (typ) quiescent current during operation
  • Glitch-free power-up/down for hot plug-in capability
  • Open, short, and idle bus failsafe
  • 1/8 Unit load (Up to 256 bus nodes)

Applications

  • Factory automation & control
  • Building automation
  • Grid infrastructure
  • Motor drives
  • Power delivery
  • Industrial transport
  • HVAC systems
  • Video surveillance
  • Smart meters

Functional Block Diagram

Block Diagram - Texas Instruments THVD1400/THVD1420 RS-485 Transceivers
Publicado: 2021-02-11 | Actualizado: 2022-03-11