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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Diodes Incorporated AZ7033ZTR-E1

Name: AZ7033ZTR-E1
Brand: Diodes Incorporated
SKU: AZ7033ZTR-E1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AZ7033ZTR-E1

Manufacturer:: Diodes Incorporated

Category:: Supervisors

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: AZ7033ZTR-E1.pdf

Description:: IC SUPERVISOR 1 CHANNEL TO92

Quantity:: RFQ Add To RFQ list

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Inventory:4,955

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Product details

Overview

AZ7033ZTR-E1 from BCD Semiconductor Manufacturing Limited is a precision under-voltage detector IC with 3.3 V detection threshold, open-collector output, and built-in 50 mV hysteresis. It monitors power supply rails in CPU reset circuits and battery-backed systems, operating from 0.8 V minimum supply and consuming only 30 µA typical quiescent current at V_CC = 5.25 V.

For engineers reviewing the AZ7033ZTR-E1 datasheet, AZ7033ZTR-E1 pinout, AZ7033ZTR-E1 application, or AZ7033ZTR-E1 equivalent, this device serves as a low-power, temperature-stable reset generator for embedded microcontrollers, portable electronics, and industrial power monitoring where accurate 3.3 V rail supervision is required.

Technical Context

The AZ7033ZTR-E1 employs an on-chip precision voltage reference and comparator to detect falling V_CC below 3.15–3.45 V (typ. 3.3 V) and release upon rising V_CC above V_DET+ = V_DET− + V_HYS. Its open-collector output sinks up to 16 mA across −40°C to +85°C, with propagation delays of 10 µs (tp_HL) and 15 µs (tp_LH) into 1 kΩ/100 pF load.

Designed for direct integration into reset signal paths, it requires no external components beyond a pull-up resistor. The internal hysteresis prevents chatter during noisy or slowly ramping supply transitions, and its 0.8 V minimum operating voltage ensures valid output behavior even during deep brown-out conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Detect Voltage	3.15–3.45 V (typ. 3.3 V); defines precise reset assertion point for 3.3 V logic rails
Hysteresis Voltage	30–100 mV (typ. 50 mV); prevents false triggering during supply noise or slow transients
Quiescent Current	30 µA typ. at 5.25 V; enables multi-year battery operation in low-power monitoring
Min Operating Voltage	0.8 V typ.; guarantees functional output down to near-dead-battery conditions
Output Sink Current	16 mA min. over full temp range; drives standard TTL/CMOS reset inputs without buffering
Propagation Delay	10 µs (falling), 15 µs (rising); provides deterministic timing for synchronous system reset
Temp Coefficient	±0.01 %/°C; ensures < ±20 mV drift over −40°C to +85°C for stable long-term operation

Pinout & Package

AZ7033ZTR-E1 is supplied in TO-92 package (ammo packing), with 3-pin through-hole configuration. Pin 1 = OUT (open-collector), Pin 2 = GND, Pin 3 = V_CC. Mechanical dimensions conform to JEDEC TO-92 standard (12.5 mm height, 4.7 mm width, 3.7 mm depth).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (OUT)	Open-collector output	Sinks current when V_CC falls below V_DET−; requires external pull-up for logic-high state
Pin 2 (GND)	Ground reference	Return path for internal circuitry and output sink current; must be low-impedance
Pin 3 (V_CC)	Supply input	Monitored voltage rail; powers internal reference/comparator; operates down to 0.8 V

Key Features

Feature	Design Value
Ultra-low standby current	30 µA typical at 5.25 V enables >10-year coin-cell lifetime in battery backup applications
Guaranteed reset validity at low V_CC	Functional output down to 0.8 V ensures reliable reset assertion during deep brown-out
Integrated hysteresis	50 mV typical eliminates need for external RC feedback network in noisy environments
Wide temperature operation	−40°C to +85°C rating supports deployment in industrial and automotive under-hood locations
RoHS-compliant lead-free	"E1" suffix confirms compliance with EU RoHS Directive 2011/65/EU and JEDEC J-STD-020

Applications

Low Battery Voltage Detector

Processor Reset Generator

Use Scenario: Monitoring single-cell Li-ion or alkaline battery voltage in portable medical devices.

IC Role / Device Role / Timing Role: Voltage detector asserting active-low reset when battery drops below 3.3 V threshold.

Use Value: Prevents data corruption and unsafe operation by halting MCU execution before undervoltage lockout.

Use Scenario: Providing clean power-on reset signal to ARM Cortex-M0+ microcontroller in smart sensor node.

IC Role / Device Role / Timing Role: Supervisory IC generating synchronized reset pulse after V_CC stabilizes above 3.3 V.

Use Value: Eliminates need for RC-based reset circuits, improving startup reliability and reducing BOM count.

Power Fail Indicator

Battery Backup Control

Use Scenario: Detecting AC mains failure in UPS-enabled IoT gateway to trigger graceful shutdown.

IC Role / Device Role / Timing Role: Under-voltage monitor signaling imminent power loss via open-collector flag line.

Use Value: Enables 100+ ms warning window for EEPROM save operations before backup capacitor depletes.

Use Scenario: Enabling backup power path when main 3.3 V rail fails in real-time clock module.

IC Role / Device Role / Timing Role: Control signal generator enabling analog switch to connect coin cell to RTC V_DD.

Use Value: Ensures continuous timekeeping with <1 µA added quiescent load during main power outage.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV803EB33DBZR	3.3 V fixed threshold, SOT-23-3, 0.9 µA I_Q, 150 ms reset timeout	Includes built-in reset timer; unsuitable where immediate reset assertion is required	Select when guaranteed minimum reset pulse width is needed; not drop-in for instant-response designs
APX803S-33SA-7	3.3 V threshold, SOT-23-3, 1.6 µA I_Q, 240 ms delay, push-pull output	Push-pull output eliminates external pull-up; longer delay incompatible with fast-rail systems	Prefer for ultra-low-power battery apps needing no external resistor; avoid if tp_LH/tp_HL < 20 µs is critical

Compared with TLV803EB33DBZR and APX803S-33SA-7, AZ7033ZTR-E1 offers faster response (10/15 µs), lower minimum operating voltage (0.8 V vs. ≥1.2 V), and TO-92 compatibility-making it optimal for cost-sensitive, high-reliability reset generation where minimal propagation delay and deep brown-out support are essential.

Availability

AZ7033ZTR-E1 is available at Aetrix Electronics and suitable for CPU reset generation, battery voltage monitoring, and power fail detection requiring stable component supply across industrial automation, consumer electronics, and medical instrumentation programs.

Supply support for AZ7033ZTR-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 solutions for industrial and automotive markets.

AZ7033ZTR-E1 belongs to the AZ70XX series of precision voltage detectors-designed specifically for accurate, low-power supply rail supervision in resource-constrained embedded systems where predictable reset behavior is mission-critical.

FAQ

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

A 10 kΩ pull-up to 3.3 V is recommended, yielding ~0.33 mA static current and ensuring VOL ≤ 0.4 V at 16 mA sink. Values between 4.7 kΩ and 100 kΩ are acceptable depending on rise time and power trade-offs; lower values improve noise immunity but increase quiescent load.

Does AZ7033ZTR-E1 require external capacitors for stable operation?

No external capacitors are required. The device is internally compensated and functions reliably with direct connection to V_CC and GND. A 0.1 µF ceramic bypass capacitor near the V_CC pin is recommended for high-noise environments but not mandatory per datasheet test conditions.

Can AZ7033ZTR-E1 monitor voltages other than 3.3 V?

No-it is factory-trimmed to a fixed 3.3 V detection threshold (3.15–3.45 V range). For other thresholds, select AZ7023ZTR-E1 (2.3 V), AZ7027ZTR-E1 (2.7 V), or AZ7042ZTR-E1 (4.2 V) from the same product family; each has dedicated internal reference calibration.

Is AZ7033ZTR-E1 qualified for automotive applications?

No-its specified operating temperature range is −40°C to +85°C (industrial grade), and it lacks AEC-Q100 qualification. For automotive use, consider BCD's automotive-grade AZ7033ZTR-A1 variant (−40°C to +125°C, AEC-Q100 Grade 2), which shares identical electrical specs but undergoes extended reliability testing.

AZ7033ZTR-E1 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Packaging:: Tape & Box (TB)

Product Status:: Active

Programmable:: Not Verified

Type:: Voltage Detector

Number of Voltages Monitored:: 1

Voltage - Threshold:: 3.3V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: -

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92

AZ7033ZTR-E1 FAQ

1.How can I place an order for AZ7033ZTR-E1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AZ7033ZTR-E1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AZ7033ZTR-E1 reliable?

The price and inventory of AZ7033ZTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ7033ZTR-E1 is usually 5 days.

3.What payment methods are accepted for AZ7033ZTR-E1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ7033ZTR-E1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AZ7033ZTR-E1?

AZ7033ZTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AZ7033ZTR-E1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AZ7033ZTR-E1?

For technical support, including AZ7033ZTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ7033ZTR-E1 requirements.

6.How does Aetrix verify that AZ7033ZTR-E1 is sourced from the original manufacturer or authorized distributors?

All AZ7033ZTR-E1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AZ7033ZTR-E1 meets industry standards.

7.What is the process for return or replacement of AZ7033ZTR-E1?

All AZ7033ZTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ7033ZTR-E1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AZ7033ZTR-E1 part is unused and in its original packaging.

Return procedure for AZ7033ZTR-E1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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