AZRS3072

Drivers, Receivers, Transceivers Overview

The AZRS3072 is a half-duplex RS-485 transceiver IC manufactured by Amazing Micro, designed for 3.3V power supply applications. It integrates one transmitter and one receiver compliant with EIA/TIA-485 standards. The device features ±15kV IEC 61000-4-2 contact discharge protection on bus terminals A and B, alongside ±8kV HBM and ±800V MM protection for all pins. It supports data rates up to 250 kbps with a typical supply current of 900 μA and shutdown current of 10 μA. The receiver input impedance is 96 kΩ (1/8 unit load), allowing up to 256 devices on the bus. Operating temperature ranges from -40°C to +85°C in an SOP-8 package.

Drivers, Receivers, Transceivers Feature Summary

• Integrated TVS protection provides ±15kV IEC 61000-4-2 contact discharge immunity on bus pins without external components.
• True fail-safe receiver design ensures logic high output during open, shorted, or idle differential input conditions.
• Slew-rate-limited transmitter minimizes electromagnetic interference (EMI) and signal reflections caused by improper cable termination.
• Hot-swap glitch-free protection maintains high-impedance states on control inputs during power-up to prevent system faults.

Drivers, Receivers, Transceivers Applications

• Telecommunications equipment
• Security systems
• Industrial control networks
• Building automation networks

Drivers, Receivers, Transceivers Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm the specific ordering suffix matches the required packaging format, such as tape and reel quantities. Ensure the revision date aligns with current production standards. Cross-reference datasheet electrical characteristics against system requirements before integration.

Drivers, Receivers, Transceivers Selection Notes

Select this component for 3.3V RS-485 networks requiring robust integrated ESD protection and true fail-safe functionality. The 1/8 unit load specification supports high node counts up to 256 devices. Verify that the 250 kbps data rate meets application timing constraints. Ensure the SOP-8 package footprint fits the PCB layout requirements.

Drivers, Receivers, Transceivers Part Context

The AZRS3072 belongs to the family of low-power, half-duplex RS-485 transceivers produced by Amazing Micro. It targets industrial environments where bus reliability and noise immunity are critical. The device differentiates itself through built-in transient voltage suppression and thermal shutdown capabilities, reducing the need for external protective circuitry.

Drivers, Receivers, Transceivers Replacement Considerations

Direct pin-compatible replacements may include other 3.3V RS-485 transceivers with similar ESD ratings and 1/8 unit load specifications. Verify that substitute parts maintain the same SOP-8 package dimensions and electrical thresholds. Check for equivalent fail-safe behavior and slew-rate limiting characteristics to ensure signal integrity compatibility.

Drivers, Receivers, Transceivers FAQ

What constitutes the 'true fail-safe' feature in the AZRS3072?

The true fail-safe feature guarantees a logic high receiver output when the differential inputs are open, shorted, or idle, eliminating the need for external pull-up/pull-down resistors typically required for basic fail-safe designs.

How does the AZRS3072 handle hot-swap conditions?

The device features hot-swap glitch-free protection that keeps the transmitter and receiver outputs in a high-impedance state during power-up until the supply voltage stabilizes, preventing short-circuit currents and bus glitches.

What is the maximum number of devices supported on the bus?

With a receiver input impedance of 96 kΩ (1/8 unit load), the AZRS3072 allows up to 256 transceivers to be connected in parallel on the RS-485 bus while maintaining compliance with the standard.