Diodes Incorporated AZ7033RTR-G1

Overview

AZ7033RTR-G1 from BCD Semiconductor Manufacturing Limited is a precision voltage detector IC with 3.3V threshold, open-collector output, and ±0.01%/°C temperature coefficient, designed for reliable power-on reset and brown-out detection in microcontroller-based systems. It operates from 0.8V minimum supply, consumes only 30µA in standby, and features 50mV built-in hysteresis to suppress noise-induced false triggers in industrial power rails.

For engineers reviewing the AZ7033RTR-G1 datasheet, AZ7033RTR-G1 pinout, AZ7033RTR-G1 application, or AZ7033RTR-G1 equivalent, this device is selected for low-power reset generation where tight voltage tolerance (±0.15V), fast response (15µs rise delay), and SOT-89 thermal performance (74°C/W) are critical in battery-backed and embedded control designs.

Technical Context

The AZ7033RTR-G1 implements a precision bandgap reference and rail-to-rail comparator architecture to monitor VCC against a fixed 3.3V detection threshold (VDET− = 3.15V typ, VDET+ = 3.45V typ). Its hysteresis window (50mV typ) ensures stable output transitions during noisy supply ramp-up or sag events.

Output behavior follows defined timing: tpLH = 15µs (VCC rising above VDET+) and tpHL = 10µs (VCC falling below VDET−), with guaranteed low-level output voltage ≤0.4V at 20mA sink current and operation across −40°C to +85°C ambient.

Key Specifications

Pinout & Package

SOT-89 package: 3-pin surface-mount, thermally enhanced plastic case with exposed pad (θJC = 74°C/W), footprint compatible with JEDEC TO-243AA standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803DB33PDBZR and MAX809SEUR+T, the AZ7033RTR-G1 delivers tighter threshold accuracy (±4.5%), integrated hysteresis, and faster response-making it optimal for real-time power monitoring where supply stability is mission-critical.

Availability

AZ7033RTR-G1 is available at Aetrix Electronics and suitable for industrial automation controllers, battery-powered IoT endpoints, and automotive body electronics requiring stable component supply with RoHS-compliant green packaging and tape-and-reel delivery.

Supply support for AZ7033RTR-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 IC foundry and fabless designer specializing in high-reliability power management and signal conditioning products for industrial and automotive markets.

The AZ70XX series was developed specifically for cost-sensitive, high-volume voltage monitoring applications requiring precision, low power, and robust noise immunity in consumer and industrial power systems.

FAQ

What is the maximum supply voltage the AZ7033RTR-G1 can monitor?

The AZ7033RTR-G1 supports supply voltages up to 18V per absolute maximum ratings, enabling direct monitoring of unregulated 12V or 15V rails without external resistive dividers. This extends usability beyond typical 3.3V logic domains into broader power system supervision roles while maintaining accurate 3.3V threshold detection via internal scaling.

Does the AZ7033RTR-G1 require an external pull-up resistor on its output?

Yes-the AZ7033RTR-G1 features an open-collector output that must be pulled up externally to a logic-compatible voltage rail (e.g., 1.8V, 3.3V, or 5V). Typical pull-up values range from 10kΩ to 100kΩ depending on rise time requirements and bus loading; no internal pull-up is integrated.

How does the built-in hysteresis affect system reliability?

The 50mV typical hysteresis prevents output chatter during slow or noisy supply transitions near the 3.3V threshold-eliminating false resets caused by ripple, load transients, or EMI. This removes the need for external RC filters or Schmitt-trigger buffers, reducing BOM count and improving long-term field reliability in harsh electrical environments.

Can the AZ7033RTR-G1 operate at temperatures below −40°C?

No-the specified operating temperature range is −40°C to +85°C. Electrical characteristics including detect voltage accuracy, hysteresis, and delay times are only guaranteed within this range. Operation below −40°C may result in undefined output behavior or increased threshold drift beyond datasheet limits.