Diodes Incorporated AZ7027ZTR-E1

Overview

AZ7027ZTR-E1 from BCD Semiconductor Manufacturing Limited is a precision under-voltage detector IC with fixed 2.7 V detection threshold, open-collector output, and -40°C to +85°C operating range. It monitors power supply rails in microcontroller-based systems, delivers reset signals during brownout events, and features 50 mV typical hysteresis and 0.8 V minimum operating voltage for reliable low-V_CC operation.

For engineers reviewing the AZ7027ZTR-E1 datasheet, AZ7027ZTR-E1 pinout, AZ7027ZTR-E1 application, or AZ7027ZTR-E1 equivalent, this device serves as a low-power, temperature-stable reset generator for embedded logic systems requiring accurate supply monitoring at 2.7 V with noise immunity and fast response (10 µs tpHL).

Technical Context

The AZ7027ZTR-E1 integrates a precision on-chip voltage reference and comparator to compare V_CC against a trimmed 2.7 V threshold (±0.15 V tolerance). Its built-in 50 mV hysteresis prevents output oscillation during noisy or slowly varying supply conditions.

It operates with ultra-low quiescent current-30 µA typical at V_CC = 5.25 V (off-state) and 300 µA typical during detection (on-state)-and supports open-collector output sinking up to 16 mA across the full temperature range, enabling flexible pull-up configuration with external resistors.

Key Specifications

Pinout & Package

AZ7027ZTR-E1 is supplied in TO-92 package (ammo packing format), with 3-pin through-hole configuration and standard lead spacing (2.54 mm pitch). The package meets RoHS compliance per "E1" suffix and supports manual or automated insertion.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB27DPWR and MAX809SEUR+T, AZ7027ZTR-E1 offers balanced performance: lower cost than MAX809SEUR+T, superior hysteresis integration versus TLV803EB27DPWR, and TO-92 ammo packaging suited for high-volume through-hole assembly.

Availability

AZ7027ZTR-E1 is available at Aetrix Electronics and suitable for low-battery detection, processor reset generation, power fail indication, and battery backup control requiring stable component supply across consumer, industrial, and metering applications.

Supply support for AZ7027ZTR-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 China-based analog and mixed-signal IC manufacturer specializing in power management, protection, and sensing solutions for cost-sensitive high-volume applications.

AZ7027ZTR-E1 belongs to the AZ70XX series of voltage detectors-designed specifically for accurate, low-power supply monitoring in battery-powered and embedded logic systems with minimal external components.

FAQ

What is the function of the open-collector output in AZ7027ZTR-E1?

The open-collector output allows the AZ7027ZTR-E1 to sink current when V_CC falls below 2.7 V, pulling the output line low. An external pull-up resistor is required to define the high-state voltage level, enabling compatibility with multiple logic families (e.g., 3.3 V or 5 V systems) and wired-OR reset bus configurations commonly used in multi-processor designs.

Can AZ7027ZTR-E1 operate from a 1.2 V supply?

No. While the device asserts reset down to 0.8 V minimum operating voltage, it requires V_CC ≥ 1.8 V to guarantee correct internal reference and comparator operation per datasheet specifications. Below 1.8 V, output behavior is undefined-even if V_CC remains above 0.8 V-and functional reliability cannot be assured.

How does hysteresis improve system reliability in AZ7027ZTR-E1?

The 50 mV typical hysteresis creates a 2.7 V detection threshold (V_DET−) and a 2.75 V release threshold (V_DET+). This gap prevents rapid output toggling when V_CC lingers near 2.7 V due to ripple, noise, or slow recovery-ensuring clean, glitch-free reset signaling critical for microcontroller initialization and data integrity.

Is AZ7027ZTR-E1 pin-compatible with other AZ70XX variants?

Yes-all AZ70XX series devices in TO-92 (Z) or SOT-89 (R) packages share identical pinouts: Pin 1 = OUT, Pin 2 = GND, Pin 3 = V_CC. This allows direct substitution between AZ7023ZTR-E1, AZ7025ZTR-E1, AZ7027ZTR-E1, etc., provided the target detection voltage matches system requirements.