1 Features
1• 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 I/O Protection
– ± 16 kV HBM ESD
– ± 8 kV IEC 61000-4-2 Contact Discharge
– ± 10 kV IEC 61000-4-2 Air Gap Discharge
– ± 2 kV IEC 61000-4-4 Fast Transient Burst
• Extended Industrial Temperature Range: -40°C to
125°C
• Large Receiver Hysteresis for Noise Rejection
• Low Power Consumption
– Low Standby Supply Current: < 1 μA
– Quiescent During Operation: < 660 μA
• Glitch-Free Power-Up/Down for Hot Plug-in
Capability
• Open, Short, and Idle Bus Failsafe
• 1/8 Unit Load Options (Up to 256 Bus Nodes)
• Low EMI 500 kbps

2 Applications
. Electricity Meters (E-Meters)
. Inverters
. HVAC Systems
. Video Surveillance Systems

3 Description
THVD1500 is a robust half-duplex RS-485 transceiver
for industrial applications. The bus pins are immune
to high levels of IEC Contact Discharge ESD events
eliminating need of additional system level protection
components.
The device operates from a single 5-V supply. The
wide common-mode voltage range and low input
leakage on bus pins make THVD1500 suitable for
multi-point applications over long cable runs.
THVD1500 is available in industry standard 8-pin
SOIC package for drop-in compatibility. The device is
characterized from .40°C to 125°C.