THVD1505

ACTIVE

Bus-polarity correcting RS-485 transceiver with IEC-ESD protection

Product details

Number of receivers 1 Number of transmitters 1 Duplex Half Supply voltage (nom) (V) 5 Signaling rate (max) (MBits) 1 IEC 61000-4-2 contact (±V) 8000 Fault protection (V) -18 to 18 Common-mode range (V) -7 to 12 Number of nodes 256 Features Auto polarity, IEC ESD protection Isolated No Supply current (max) (µA) 1100 Rating Catalog Operating temperature range (°C) -40 to 125
Number of receivers 1 Number of transmitters 1 Duplex Half Supply voltage (nom) (V) 5 Signaling rate (max) (MBits) 1 IEC 61000-4-2 contact (±V) 8000 Fault protection (V) -18 to 18 Common-mode range (V) -7 to 12 Number of nodes 256 Features Auto polarity, IEC ESD protection Isolated No Supply current (max) (µA) 1100 Rating Catalog Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6
  • Meets or exceeds the requirements of the TIA/EIA-485A standard and the State Grid Corporation of China (SGCC) Part 11 Serial Communication Protocol RS-485 standard
  • 4.5-V to 5.5-V supply voltage
  • Half-duplex RS-422 / RS-485
  • Bus polarity correction within 45 ms
  • Works with or without fail-safe biasing resistors
  • Data rate: up to 1 Mbps
  • Bus I/O protection:
    • ±16-kV HBM ESD
    • ±8-kV IEC 61000-4-2 contact discharge
    • ±8-kV IEC 61000-4-2 air-gap discharge
    • ±2-kV IEC 61000-4-4 fast transient burst
  • Open, short, and idle bus fail-safe
  • Large receiver hysteresis
    for noise rejection: 120 mV
  • Up to 256 nodes on a bus (1/8 unit load)
  • Extended ambient temperature
    range: -40°C to 125°C
  • Low power consumption
    • Standby supply current: < 1 µA
    • Operational supply current: < 1.1 mA
  • Glitch-free power-up / down for hot plug-in capability
  • Meets or exceeds the requirements of the TIA/EIA-485A standard and the State Grid Corporation of China (SGCC) Part 11 Serial Communication Protocol RS-485 standard
  • 4.5-V to 5.5-V supply voltage
  • Half-duplex RS-422 / RS-485
  • Bus polarity correction within 45 ms
  • Works with or without fail-safe biasing resistors
  • Data rate: up to 1 Mbps
  • Bus I/O protection:
    • ±16-kV HBM ESD
    • ±8-kV IEC 61000-4-2 contact discharge
    • ±8-kV IEC 61000-4-2 air-gap discharge
    • ±2-kV IEC 61000-4-4 fast transient burst
  • Open, short, and idle bus fail-safe
  • Large receiver hysteresis
    for noise rejection: 120 mV
  • Up to 256 nodes on a bus (1/8 unit load)
  • Extended ambient temperature
    range: -40°C to 125°C
  • Low power consumption
    • Standby supply current: < 1 µA
    • Operational supply current: < 1.1 mA
  • Glitch-free power-up / down for hot plug-in capability

The THVD1505 is a low-power RS-485 transceiver with automatic bus-polarity correction and transient protection. Upon hot plug-in, the device detects and corrects the bus polarity within the first 45 ms of bus idling. The bus pins are robust to electrostatic discharge (ESD) events, with high levels of protection to human-body model (HBM), IEC 61000-4-2 contact discharge and air-gap discharge specifications.

The device combines a differential driver and a differential receiver, which operate together from a single 5-V power supply. 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. The device features a wide common-mode voltage range making the device suitable for multi-point applications over long cable runs. The THVD1505 is available in an SOIC-8 package, and is characterized for free-air temperatures from –40°C to 125°C.

The THVD1505 is a low-power RS-485 transceiver with automatic bus-polarity correction and transient protection. Upon hot plug-in, the device detects and corrects the bus polarity within the first 45 ms of bus idling. The bus pins are robust to electrostatic discharge (ESD) events, with high levels of protection to human-body model (HBM), IEC 61000-4-2 contact discharge and air-gap discharge specifications.

The device combines a differential driver and a differential receiver, which operate together from a single 5-V power supply. 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. The device features a wide common-mode voltage range making the device suitable for multi-point applications over long cable runs. The THVD1505 is available in an SOIC-8 package, and is characterized for free-air temperatures from –40°C to 125°C.

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Type Title Date
* Data sheet THVD1505 Bus-Polarity Correcting RS-485 Transceiver With IEC-ESD Protection datasheet PDF | HTML 08 Jan 2018
Application note How to Properly Set Up THVD1505 and SN65HVD888 in Applications PDF | HTML 15 Dec 2021
Technical article How much loading can an auto-polarity RS-485 bus support? PDF | HTML 24 May 2018

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