Diodes Incorporated AZ7031RTR-G1

Overview

AZ7031RTR-G1 from BCD Semiconductor Manufacturing Limited is a precision voltage detector IC with fixed 3.1 V detection threshold, open-collector output, and built-in 50 mV hysteresis. It monitors supply rails in embedded systems, delivers reset signals during brownout or power-up, and operates down to 0.8 V supply while consuming only 30 µA typical quiescent current at 5.25 V. Designed for CPU reset generation and low-battery indication in home appliances and industrial controllers.

For engineers reviewing the AZ7031RTR-G1 datasheet, AZ7031RTR-G1 pinout, AZ7031RTR-G1 application, or AZ7031RTR-G1 equivalent, this device serves as a low-power, temperature-stable (±0.01 %/°C) under-voltage supervisor with validated timing response (tpLH = 15 µs, tpHL = 10 µs), SOT-89 package compatibility, and green RoHS-compliant packaging.

Technical Context

The AZ7031RTR-G1 implements a precision bandgap voltage reference and comparator architecture to detect falling VCC below 3.1 V (VDET− = 2.95 V typ) and release above 3.15 V (VDET+ = 3.25 V typ), delivering hysteresis of 50 mV. Its open-collector output sinks up to 16 mA across −40 °C to +85 °C, enabling direct interface with microcontroller reset inputs via external pull-up.

It operates over 0.8 V to 18 V supply range, maintains valid output only when VCC ≥ VOPR (0.8 V), and exhibits stable detect voltage drift (±0.01 %/°C). The device requires no external components for basic supervision and supports immediate reset assertion upon power failure without latch or delay circuitry.

Key Specifications

Pinout & Package

AZ7031RTR-G1 is housed in a 3-pin SOT-89 surface-mount package (4.4 × 2.6 × 1.5 mm), optimized for thermal performance (θJC = 74 °C/W) and board space efficiency in compact power-supply monitoring circuits.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with TLV803EB31DBZR and MAX809SEUR+T, AZ7031RTR-G1 offers wider supply range (0.8–18 V), guaranteed 50 mV hysteresis, and robust 16 mA output drive-making it uniquely suited for industrial 12 V systems and battery-powered equipment where supply variability and noise immunity are critical.

Availability

AZ7031RTR-G1 is available at Aetrix Electronics and suitable for industrial control systems, smart home appliances, and portable medical devices requiring stable component supply, green RoHS compliance, and long-term lifecycle support.

Supply support for AZ7031RTR-G1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

BCD Semiconductor Manufacturing Limited is a Shanghai-based analog and mixed-signal IC designer and foundry partner, specializing in high-reliability power management and sensing solutions for industrial and consumer markets.

AZ7031RTR-G1 belongs to the AZ70XX series of voltage detectors-designed specifically for accurate, low-power supply monitoring in cost-sensitive embedded systems where precision threshold stability and noise immunity are essential.

FAQ

What is the exact detect voltage tolerance and temperature coefficient of AZ7031RTR-G1?

The AZ7031RTR-G1 has a detect voltage of 3.1 V with a min/max range of 2.95 V to 3.25 V at 25 °C, and a temperature coefficient of ±0.01 %/°C over −40 °C to +85 °C. This is verified per Electrical Characteristics Table on page 5 of the official datasheet, measured with RL = 200 Ω and VOL ≤ 0.4 V.

Can AZ7031RTR-G1 drive a microcontroller reset pin directly?

Yes-its open-collector output sinks up to 16 mA across the full temperature range and pulls low to ≤0.4 V at rated load, meeting standard CMOS/TTL reset input requirements. An external pull-up resistor (e.g., 10 kΩ to 3.3 V or 5 V) is required to define the inactive high state.

Is the SOT-89 package thermally adequate for continuous operation at 18 V input?

Yes-the SOT-89 package has θJC = 74 °C/W and a 500 mW power dissipation rating at 25 °C ambient. At 18 V and 300 µA max ICC, power dissipation is <5.4 mW, resulting in negligible junction temperature rise-well within safe operating limits.

Does AZ7031RTR-G1 require any external components to function as a reset generator?

No external components are required for basic reset functionality. The device integrates precision reference, comparator, and hysteresis. Only an external pull-up resistor on the OUT pin is needed to establish logic-high level; no capacitors, resistors, or diodes are necessary for core supervision operation.