THVD1505 Bus-polarity correcting RS-485 transceiver with IEC-ESD protection | TI.com

THVD1505
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Bus-polarity correcting RS-485 transceiver with IEC-ESD protection

 

Description

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.

Features

  • 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

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Parametrics

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Part number Order Supply voltage(s) (Nom) (V) Number of TX Number of RX Duplex Signaling rate (Max) (Mbps) IEC 61000-4-2 contact (+/- kV) HBM ESD (kV) Fault protection (V) Number of nodes Common mode range ICC (Max) (mA) Features Isolated Rating Operating temperature range (C) Package Group Approx. price (US$)
THVD1505 Order now 5     1     1     Half     1     8     16     -18 to 18     256     -15 to 15     1.1     Auto polarity
IEC ESD protection    
No     Catalog     -40 to 125     SOIC | 8     0.55 | 1ku    
SN65HVD888 Order now 5     1     1     Half     0.25     12     16     -18 to 18     256     -7 to 12     0.9     Auto polarity
IEC ESD protection    
No     Catalog     -40 to 85     SOIC | 8     0.80 | 1ku    
THVD1410 Order now 3.3
5    
1     1     Half     0.5     18     30     -18 to 18     256     -15 to 15     2.8     IEC ESD protection
Extended common mode    
No     Catalog     -40 to 125     SOIC | 8
VSSOP | 8    
0.99 | 1ku    
THVD1419 Order now 3.3
5    
1     1     Half     0.25     8     16     -15 to 15     256     -12 to 12     3     Surge protection
IEC ESD protection
Extended common mode    
No     Catalog     -40 to 125     SOIC | 8     1.30 | 1ku    
THVD1500 Order now 5     1     1     Half     0.5     8     16     -18 to 18     256     -7 to 12     0.66     IEC ESD protection     No     Catalog     -40 to 125     SOIC | 8     0.52 | 1ku    
THVD1510 Order now 5