THVD1550 IC Chip

THVD1550 （5~V RS-485 Transceivers With +18-kV IEC ESD Protection）

Introduction

THVD15xx(THVD1550) is a family of noise-immune RS-485/RS-422 transceivers designed to operate in rugged industrial environments. The bus pins of these devices are robust to high levels of IEC electrical fast transients (EFT) and IEC electrostatic discharge(ESD) events, eliminating the need for additional system-level protection components.

Each of these devices operates from a single 5-V supply. The devices in this family feature an extended common-mode voltage range which makes them suitable for multi-point applications over long cable runs.

THVD15xx(THVD1550) family of devices is available in small VSSOP packages for space-constrained applications.These devices are characterized over ambient free-air temperatures from  -40°C to 125°C.

Features

• Meets or Exceeds the Requirements of the TIA/EIA- 485A Standard
• 4.5V to 5.5V Supply Voltage
• Integrated Bus I/O Protection
  –±30kVHBMESD
  –±18 kV IEC 61000-4-2 ESD Contact Discharge
  –±25kV IEC 61000-4-2 ESD Air-Gap Discharge
  –±4 kV IEC 61000-4- 4 Electrical Fast Transient
• Extended Operational Common-mode:±15 V
• Low EMI 500 kbps and 50 Mbps Data Rates
• Extended Temperature Range: -40°C to 125°C
• Large Receiver Hysteresis for Noise Rejection
• Low Power Consumption
  –Low Standby Supply Current: < 1 μA
  –Current During Operation: < 1 mA
• 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)
• Small-Size VSSOP Packages Save Board Space or SOIC for Drop-in Compatibility

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