Diodes Incorporated AZ7045ZTR-G1

Overview

AZ7045ZTR-G1 from BCD Semiconductor Manufacturing Limited is a precision voltage detector IC with 4.5 V detection threshold, open-collector output, and built-in 50 mV hysteresis. It monitors supply rails in low-power embedded systems, delivers reset signals during brownout events, and operates down to 0.8 V supply while consuming only 30 µA in standby mode.

For engineers reviewing the AZ7045ZTR-G1 datasheet, AZ7045ZTR-G1 pinout, AZ7045ZTR-G1 application, or AZ7045ZTR-G1 equivalent, this device serves as a cost-effective, temperature-stable (−40 to +85 °C) power-fail indicator and processor reset generator in battery-powered and industrial control applications where accurate undervoltage supervision is required.

Technical Context

The AZ7045ZTR-G1 uses an on-chip precision voltage reference and comparator to compare VCC against a fixed 4.5 V threshold (±0.15 V over temperature). Its hysteresis of 50 mV prevents chatter during slow-rising/falling supply transitions.

It features open-collector output compatible with external pull-up voltages up to 20 V, supports minimum operating voltage of 0.8 V, and provides defined logic-low output (≤0.4 V at 20 mA) only when VCC drops below VDET− (4.35 V typical), with 15 µs delay on power-up release (tpLH) and 10 µs delay on power-down assertion (tpHL).

Key Specifications

Pinout & Package

AZ7045ZTR-G1 is supplied in SOT-89 package (3-pin, surface-mount), with thermal resistance θJC = 74 °C/W and power dissipation rating of 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 TLV803EB33DBZR and MAX809SEUR+T, AZ7045ZTR-G1 offers tighter 4.5 V threshold matching (±0.15 V), higher hysteresis for noisy environments, and SOT-89 thermal performance - making it optimal for industrial 5 V rail supervision where reliability under EMI and thermal stress is prioritized over minimal IQ.

Availability

AZ7045ZTR-G1 is available at Aetrix Electronics and suitable for industrial control systems, battery-powered medical devices, smart home appliances, and embedded sensor nodes requiring stable component supply with RoHS-compliant green packaging.

Supply support for AZ7045ZTR-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 power IC design house specializing in high-reliability, cost-optimized semiconductor solutions for industrial, consumer, and automotive markets.

The AZ70XX series was developed specifically for robust, low-cost voltage monitoring in resource-constrained embedded systems - emphasizing precision threshold stability, wide supply tolerance, and noise-immune hysteresis over ultra-low power or advanced features.

FAQ

What is the exact detect voltage tolerance for AZ7045ZTR-G1 over temperature?

The AZ7045ZTR-G1 has a detect voltage of 4.5 V with ±0.15 V tolerance (min 4.35 V, max 4.65 V) across −40 to +85 °C, as specified in the Electrical Characteristics table under VDET parameter. Its temperature coefficient is ±0.01 %/°C, contributing less than 3 mV drift over the full range.

Can AZ7045ZTR-G1 monitor a 3.3 V supply directly?

No - AZ7045ZTR-G1 has a fixed 4.5 V detection threshold and cannot monitor 3.3 V rails directly. To supervise a 3.3 V supply, use a resistive voltage divider (e.g., 10 kΩ + 15 kΩ) to scale 3.3 V up to 4.5 V at VCC pin; ensure divider current stays within ICCL limits (≤500 µA).

Does AZ7045ZTR-G1 require an external pull-up resistor on the OUT pin?

Yes - the open-collector output requires an external pull-up resistor to a logic-compatible voltage (e.g., 3.3 V or 5 V). Typical values range from 10 kΩ to 100 kΩ; lower values improve rise time but increase static current. No internal pull-up exists.

Is AZ7045ZTR-G1 qualified for automotive applications?

No - AZ7045ZTR-G1 is rated for −40 to +85 °C industrial temperature range and is not AEC-Q100 qualified. It lacks automotive-specific reliability testing, extended temperature coverage (−40 to +125 °C), or PPAP documentation. Use only in commercial/industrial end equipment.