TISN65HVD21MDREP

Overview

The SN65HVD21MDREP is a high-performance RS-485 transceiver designed for reliable operation in harsh environments, featuring a wide common-mode voltage range of -20V to 25V. Part of the Texas Instruments Enhanced Product (EP) line, it supports data rates up to 5Mbps and offers an extended operating temperature range from -55C to 125C. This half-duplex device includes internal protection against ESD strikes up to 16-kV HBM on the bus pins.

Why Choose This Part

The device offers a superior common-mode range that exceeds standard RS-485 requirements, ensuring communication stability during ground shifts. It features a low 1.5-uA maximum standby current for power-sensitive designs and includes integrated failsafe circuitry for open-circuit or idle-bus conditions. The 130 mV receiver hysteresis provides improved noise immunity in high-interference applications.

Applications

Getting Started

To evaluate this transceiver, designers can use standard SOIC-8 breakout boards for prototyping or integrate it into RS-485 test circuits using 5V logic. Ensure a 120-ohm termination resistor is placed at the ends of the bus, and use a 0.1-uF bypass capacitor located close to the VCC pin. For high-reliability applications, follow TI's layout guidelines regarding differential pair routing and ground planes.

SN65HVD21 Family

Comparing specs that differ across variants. The current part is highlighted.

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