SN65HVD1781 RS-485 Transceivers IC Chip

SN65HVD1781（ Fault-Protected RS-485 Transceivers With 3.3V to 5V Operation）

Introduction

The SN65HVD1781/1780/1782 devices are designed to survive overvoltage faults such as direct shorts to power supplies, mis-wiring faults, connector failures, cable crushes, and tool mis-applications.The devices are also robust to ESD events with high levels of protection to the human-body-model specification.

The SN65HVD1781/1780/1782 devices combine a differential driver and a differential receiver, which operate from a single power supply. In the SN65HVD1782,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. This port features a wide common-mode voltage range, making the devices suitable for multipoint applications over long cable runs.These devices characterize from -40°C to 125°C. They maintain pin compatibility with the industry-standard SN75176 transceiver, facilitating drop-in upgrades in most systems.

These devices are fully compliant with ANSI TIA/EIA 485-A with a 5V supply and can operate with a 3.3V supply with reduced driver output voltage for low-power applications.For applications requiring operation over an extended common-mode voltage range.

Feature 

• Bus-Pin Fault Protection to: 
  – > ±70 V (SN65HVD1780, SN65HVD1781)
  – > ±30 V (SN65HVD1782)
• Operation With 3.3V to 5V Supply Range
• ±16-kV HBM Protection on Bus Pins
• Reduced Unit Load for Up to 320 Nodes
• Failsafe Receiver for Open-Circuit, Short-Circuit and ldle-Bus Conditions
• Low Power Consumption
  – Low Standby Supply Current, 1 μA Maximum
  – Icc 4mA Quiescent Current During Operation
• Pin-Compatible With Industry-Standard SN75176
• Signaling Rates of 115 kbps, 1 Mbps, and up to 10 Mbps
• Create a Custom Design using the SN65HVD178x with the WEBENCH® Power Designer

Appearance