SN65HVD1780D Device Information

Overview

The SN65HVD1780D is a fault-protected RS-485 transceiver designed for robust communication in industrial and commercial applications. It features bus-pin fault protection up to ±70 V and operates within a 3.3-V to 5-V supply range. This device is suitable for half-duplex (two-wire bus) communication and is pin-compatible with the industry-standard SN75176.

Key Features

• Bus-Pin Fault Protection: Up to ±70 V
• Supply Voltage Range: 3.3 V to 5 V
• ESD Protection: ±16 kV HBM on bus pins
• Reduced Unit Load: Supports up to 320 nodes
• Failsafe Receiver: Ensures safe operation under open-circuit, short-circuit, and idle-bus conditions
• Low Power Consumption: 1 µA maximum standby supply current, 4 mA quiescent current during operation
• Signaling Rates: Up to 115 kbps
• Package Type: SOIC (8-pin)

Applications

• HVAC Networks
• Security Electronics
• Building Automation
• Telecommunication Equipment
• Motion Control
• Industrial Networks

Package and Ordering Information

• Package Type: SOIC (8-pin)
• Body Size: 4.90 mm × 3.91 mm
• Orderable Options:SN65HVD1780D: SOIC, 8-pinSN65HVD1780DG4: SOIC, 8-pin, GreenSN65HVD1780DR: SOIC, 8-pin, BulkSN65HVD1780DRG4: SOIC, 8-pin, Green, Bulk

Specifications

• Absolute Maximum Ratings:Supply Voltage (VCC): –0.5 V to 7 VBus Voltage (A, B pins): –70 V to 70 VInput Voltage at Logic Pins: –0.3 V to VCC + 0.3 VReceiver Output Current: ±24 mAJunction Temperature (TJ): 170 °CStorage Temperature (Tstg): –55 °C to 150 °C
• ESD Ratings:Human Body Model (HBM): ±16 kVMachine Model: ±400 VCharged Device Model (CDM): ±2 kV
• Operating Conditions:Supply Voltage (VCC): 3.15 V to 5.5 VInput Voltage at Bus Terminals (VI): –7 V to 12 VDifferential Input Voltage (VID): –12 V to 12 VSignaling Rate: Up to 115 kbpsOperating Temperature (TA): –40 °C to 105 °CJunction Temperature (TJ): –40 °C to 150 °C

Detailed Description

The SN65HVD1780D is designed to survive overvoltage faults and ESD events, making it suitable for harsh environments. It combines a differential driver and receiver, operating from a single power supply. The device is fully compliant with ANSI TIA/EIA 485-A and can operate with a 3.3-V supply for low-power applications.