Texas Instruments SN65HVD3082EDR – 5V Half-duplex RS-485 Transceiver ESD Protection 8-Pin SOIC

Texas Instruments SN65HVD3082EDR – 5V Half-duplex RS-485 Transceiver ESD Protection 8-Pin SOIC

The Texas InstrumentsSN65HVD3082EDR is a low-power, half-duplex RS-485 transceiver designed to operate reliably in harsh, electrically noisy industrial environments. It translates standard logic signals into the differential signaling required for the RS-485 and RS-422 protocols, allowing for data transmission over long cables (up to 1200+ meters). This specific “E” variant features enhanced 15kV ESD protection on the bus pins and integrated failsafe circuitry to ensure a stable logic state even if the bus is idle, open, or shorted. The SN65HVD3082EDR is an industry-standard choice for power-sensitive networks like utility meters and building automation.

Features

• Half-Duplex Communication: Optimized for 2-wire networks where nodes take turns transmitting and receiving data.

• Superior ESD Protection: Bus pins are rated for up to ±15kV (HBM), reducing the need for external protection components in most designs.

• Low Power Modes: Features an ultra-low 1nA shutdown mode and 0.3mA active quiescent current, making it ideal for battery-powered systems.

• High Node Count: 1/8 unit-load design allows for up to 256 nodes on a single shared communication bus.

• Failsafe Receiver: Internal circuitry ensures a logic-high output when inputs are open, shorted, or the bus is idle, preventing false data triggers.

Key Points

• It is a direct “drop-in” upgrade for the older, industry-standard SN75176 footprint but with significantly lower power consumption.

• The device includes thermal shutdown protection to prevent damage if a bus fault causes excessive current draw and heating.

• Designed with controlled transition times, it reduces EMI and minimizes reflections on long or improperly terminated cables.

• The “DR” suffix indicates the part is supplied in a Tape & Reel format, optimized for high-speed automated assembly.

Specifications