Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated ZM33064CL

Name: ZM33064CL
Brand: Diodes Incorporated
SKU: ZM33064CL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ZM33064CL

Manufacturer:: Diodes Incorporated

Category:: Supervisors

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

Datasheet:: ZM33064CL.pdf

Description:: IC SUPERVISOR 1 CHANNEL TO92-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,308

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ZM33064CL from Zetex Semiconductors is a three-terminal under-voltage monitor IC designed for power-on reset and brownout detection in 5 V microprocessor systems. It features a precise 4.6 V threshold, 20 mV hysteresis, open-collector output sinking ≥10 mA, guaranteed operation from 1.0 V supply, and internal clamp diode for delay capacitor discharge.

For engineers reviewing the ZM33064CL datasheet, ZM33064CL pinout, ZM33064CL application, or ZM33064CL equivalent, key selection criteria include reset threshold accuracy, hysteresis stability over temperature, sink current capability at low V_CC, quiescent current (200 µA max), and TO92/SOT223/SO8 package compatibility with legacy and surface-mount designs.

Technical Context

The ZM33064CL integrates a precision bandgap voltage reference and comparator with built-in hysteresis to eliminate oscillation during supply ramp-up or brownout events. Its output remains low from power-on until V_CC exceeds 4.61 V (rising threshold), then stays high until V_CC drops below 4.59 V (falling threshold).

Operation is fully specified from −40 °C to +85 °C with propagation delay of 1.5 µs (R_L = 10 kΩ) and output saturation voltage ≤0.4 V at 2 mA sink. The internal clamp diode enables simple RC-based reset timing without external components beyond the pull-up resistor.

Key Specifications

Parameter	Value and Actual Design Meaning
Threshold Voltage	4.6 V nominal; ensures reliable reset assertion for standard 5 V logic systems before invalid operation begins.
Hysteresis	20 mV typical; prevents chatter during slow or noisy supply transitions near threshold.
Output Sink Current	10 mA min at V_CC = 4.0 V; drives standard TTL/CMOS reset inputs directly with single pull-up resistor.
Quiescent Current	200 µA max at 5 V; enables use in battery-powered equipment without significant standby drain.
Operating Voltage Range	1.0 V to 6.5 V; supports valid reset generation even during deep brownout or ultra-low-power wake-up sequences.
Propagation Delay	1.5 µs typical; provides fast response to supply collapse while avoiding false triggers from transient spikes.
Clamp Diode V_F	1.2 V typical at 10 mA; discharges external timing capacitor automatically, eliminating need for discrete discharge path.

Pinout & Package

Available in TO92 (suffix C), SOT223 (suffix G), and SO8 (suffix N8) packages. This entry refers to the TO92 variant (ZM33064CL), with lead configuration matching standard Zetex TO92 outline: Pin 1 = V_CC, Pin 2 = GND, Pin 3 = Output (open-collector).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Supply Input (V_CC)	Connects to monitored 5 V rail; device draws quiescent current here and compares against internal reference.
Pin 2	Ground (GND)	Reference node for comparator and output stage; must be low-impedance return path for sink current.
Pin 3	Open-Collector Output	Sinks current when V_CC < 4.59 V; requires external pull-up to host system's reset domain voltage (e.g., 3.3 V or 5 V).

Key Features

Feature	Design Value
Power-on reset generator	Guarantees low output from V_CC = 1.0 V upward until threshold is crossed-no external timing components needed for basic POR.
Automatic brownout reset	Reasserts reset whenever supply dips below 4.59 V after initial power-up, protecting MPU from undervoltage execution.
Low standby current	200 µA max at 5 V enables integration into always-on subsystems without compromising battery life.
Internal clamp diode	Discharges external RC timing capacitor automatically, simplifying delay circuit design and reducing BOM count.
Wide temperature range	Specified from −40 °C to +85 °C with <±5 mV threshold drift-suitable for automotive and industrial environments.

Applications

Microprocessor Power Monitoring

Industrial Control PLCs

Use Scenario: Monitoring 5 V supply rails in embedded microcontrollers where stable reset is required before code execution.

IC Role / Device Role / Timing Role: Under-voltage detector providing active-low reset signal synchronized to supply ramp and collapse events.

Use Value: Prevents CPU lockup or corrupted memory writes by ensuring reset remains asserted until V_CC stabilizes above 4.61 V and stays high until drop below 4.59 V.

Use Scenario: Supervising auxiliary 5 V logic supplies in programmable logic controllers operating in harsh factory environments.

IC Role / Device Role / Timing Role: Brownout protection element with hysteresis to reject noise-induced false resets on noisy 24 V DC-derived 5 V rails.

Use Value: Maintains deterministic system behavior across temperature extremes (−40 °C to +85 °C) with <±5 mV threshold variation.

Automotive Body Control Modules

Battery-Powered Data Loggers

Use Scenario: Reset supervision for microcontrollers in non-safety-critical body electronics (e.g., door modules, lighting controllers).

IC Role / Device Role / Timing Role: Low-quiescent-current voltage monitor enabling reliable startup after cold cranking (V_BAT dip to ~6 V → 5 V rail collapse).

Use Value: Operates down to 1.0 V input, allowing reset assertion even during severe brownout conditions common in 12 V automotive systems.

Use Scenario: Ensuring clean boot and shutdown sequencing in portable environmental sensors powered by Li-ion or alkaline cells.

IC Role / Device Role / Timing Role: Supply supervisor with integrated clamp diode for programmable reset delay via external RC network.

Use Value: Eliminates need for discrete discharge transistor, reducing PCB area and component count while supporting configurable timeout (e.g., 100 ms–2 s).

Equivalent & Alternatives

The following parts are listed as comparable options for similar under-voltage monitor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX809SEUR+T	4.63 V threshold, 140 µA I_Q, SOT23-3 package only, no internal clamp diode	Requires external discharge path for RC delay; tighter threshold tolerance (±1.5%) but narrower temp range (−40 °C to +85 °C same)	Preferred when minimal quiescent current and tight threshold tolerance outweigh need for integrated clamp diode.
TLV803EB33DBZR	3.3 V fixed threshold, 0.5 µA I_Q, SOT23-3, no hysteresis or clamp diode	Not suitable for 5 V systems without level-shifting; ultra-low I_Q ideal for multi-year battery life but lacks ZM33064CL's brownout recovery hysteresis	Select only for 3.3 V domains requiring nanoscale standby current; not a functional substitute for 5 V monitoring.

Compared with MAX809SEUR+T and TLV803EB33DBZR, the ZM33064CL uniquely combines 4.6 V threshold, integrated clamp diode, and 20 mV hysteresis in through-hole (TO92) and surface-mount packages-enabling robust, component-minimal reset circuits for 5 V microprocessor systems without redesigning timing networks.

Availability

ZM33064CL is available at Aetrix Electronics and suitable for microprocessor power monitoring, industrial control PLCs, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ZM33064CL 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

Zetex Semiconductors plc was a UK-based analog and mixed-signal semiconductor company specializing in high-performance, low-power protection and interface devices before its acquisition by Diodes Incorporated in 2008.

The ZM33064 belongs to Zetex's supply voltage monitor product line, engineered specifically for deterministic power-on and brownout reset generation in cost-sensitive, high-reliability 5 V embedded systems.

FAQ

What is the function of the internal clamp diode in the ZM33064CL?

The internal clamp diode connects between the output pin and V_CC, allowing automatic discharge of an external RC timing capacitor when the output goes high. This eliminates the need for an external transistor or diode in delayed-reset configurations, simplifying circuit design and improving reliability by removing a potential failure point.

Can the ZM33064CL be used with a 3.3 V microprocessor reset input?

Yes-the open-collector output can be pulled up to 3.3 V using an external resistor. The output sink capability (≥10 mA) and low saturation voltage (<0.4 V at 2 mA) ensure compatible logic levels. However, the 4.6 V threshold remains fixed, so it monitors the 5 V supply-not the 3.3 V rail-making it appropriate only when reset timing correlates to the higher-voltage domain.

How does hysteresis improve system reliability in the ZM33064CL?

Hysteresis creates a 20 mV gap between rising (4.61 V) and falling (4.59 V) thresholds, preventing rapid toggling of the reset signal during slow or noisy supply transitions near the trip point. This avoids unintended processor resets or repeated reboots that could occur with a single-threshold detector under marginal power conditions.

Is the ZM33064CL RoHS-compliant and halogen-free?

Yes-Zetex issued RoHS-compliant versions of the ZM33064 family prior to its acquisition. The TO92 (C), SOT223 (G), and SO8 (N8) variants meet EU RoHS Directive 2011/65/EU and are halogen-free per IEC 61249-2-21. Full compliance documentation is available upon request for Aetrix Electronics customers.

ZM33064CL Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.6V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 1.5µs Typical Propagation Delay

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92

ZM33064CL FAQ

1.How can I place an order for ZM33064CL through Aetrix?

Please submit a Request for Quotation (RFQ) for ZM33064CL 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 ZM33064CL reliable?

The price and inventory of ZM33064CL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZM33064CL is usually 5 days.

3.What payment methods are accepted for ZM33064CL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZM33064CL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZM33064CL?

ZM33064CL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZM33064CL 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 ZM33064CL?

For technical support, including ZM33064CL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZM33064CL requirements.

6.How does Aetrix verify that ZM33064CL is sourced from the original manufacturer or authorized distributors?

All ZM33064CL 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 ZM33064CL meets industry standards.

7.What is the process for return or replacement of ZM33064CL?

All ZM33064CL units undergo pre-shipment inspection (PSI). If there is an issue with ZM33064CL, 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 ZM33064CL part is unused and in its original packaging.

Return procedure for ZM33064CL:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…