Diodes Incorporated AZ7033RTR-E1

Overview

AZ7033RTR-E1 from BCD Semiconductor Manufacturing Limited is a precision voltage detector IC with 3.3 V detection threshold, open-collector output, and built-in 50 mV hysteresis-designed for reliable power-on reset and brown-out monitoring in microcontroller-based systems. It operates from 0.8 V minimum supply and draws only 30 µA typical quiescent current at 5.25 V.

For engineers reviewing the AZ7033RTR-E1 datasheet, AZ7033RTR-E1 pinout, AZ7033RTR-E1 application, or AZ7033RTR-E1 equivalent, this device serves as a low-power, temperature-stable reset generator for embedded control, battery-powered instrumentation, and industrial logic systems requiring accurate 3.3 V supply supervision.

Technical Context

The AZ7033RTR-E1 uses an on-chip precision voltage reference and comparator to monitor VCC against a fixed 3.3 V threshold (±0.15 V over temperature). Its hysteresis ensures noise immunity during supply transients, with VDET− = 3.15 V and VDET+ = 3.45 V.

It features open-collector output compatible with external pull-up voltages up to 20 V, supports operation across −40 °C to +85 °C, and delivers 16 mA sink current at full temperature range while maintaining <0.4 V low-level output voltage under 200 Ω load.

Key Specifications

Pinout & Package

SOT-89 package: 3-pin surface-mount plastic package with exposed thermal pad (θJC = 74 °C/W), optimized for compact PCB layout and moderate power dissipation (500 mW at TA = 25 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803DBZQ1 and MAX809SEUR+T, the AZ7033RTR-E1 offers superior hysteresis (50 mV vs. none or unspecified) and wider supply range (0.8–20 V vs. 0.9–6 V), making it more robust for noisy industrial rails and multi-voltage systems.

Availability

AZ7033RTR-E1 is available at Aetrix Electronics and suitable for industrial control panels, battery-powered IoT edge nodes, and home appliance power management systems requiring stable component supply and RoHS-compliant packaging.

Supply support for AZ7033RTR-E1 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 design and wafer fabrication company specializing in high-reliability power management and signal conditioning devices.

The AZ70XX series belongs to BCD's precision voltage supervisor product line, engineered specifically for cost-sensitive yet performance-critical reset and power-fail detection in consumer, industrial, and white-goods applications.

FAQ

What is the recommended pull-up resistor value for the open-collector output?

A 10 kΩ pull-up to the target logic rail (e.g., 3.3 V or 5 V) provides optimal speed–power trade-off: it ensures <1 µs rise time while limiting leakage current to <0.33 mA. Lower values (e.g., 4.7 kΩ) improve noise immunity but increase static power; higher values (>100 kΩ) risk slow edges in noisy environments.

Can AZ7033RTR-E1 monitor a 1.8 V supply rail?

No-it is not designed for sub-3.3 V rail monitoring. Its 3.3 V detection threshold and 0.8 V minimum operating voltage mean it will remain inactive if VCC never reaches 3.15 V. For 1.8 V systems, use AZ7018 variants or dedicated low-threshold detectors like APX803L.

Does AZ7033RTR-E1 require decoupling capacitance?

Yes-a 0.1 µF ceramic capacitor between VCC and GND, placed within 2 mm of the SOT-89 pins, is required to suppress high-frequency noise that could cause false triggering. This is explicitly validated in the datasheet test circuits and improves hysteresis effectiveness.

Is AZ7033RTR-E1 qualified for automotive applications?

No-it is rated for industrial temperature range (−40 °C to +85 °C) and carries no AEC-Q100 qualification. For automotive use, consider TLV803-Q1 or NCV301 series, which include extended temperature screening, PPAP documentation, and failure-in-time (FIT) data.