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

STMicroelectronics STM1061N31WX6F

Name: STM1061N31WX6F
Brand: STMicroelectronics
SKU: STM1061N31WX6F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM1061N31WX6F

Manufacturer:: STMicroelectronics

Category:: Supervisors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: STM1061N31WX6F.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-3

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Product details

Overview

STM1061N31WX6F from STMicroelectronics is a low-power, factory-trimmed voltage detector IC with 3.1 V ±2% threshold, open-drain active-low output, 0.9 µA typical supply current at 3.0 V, and guaranteed operation down to VCC = 0.7 V. It monitors system supply rails in portable electronics, microcontroller reset circuits, and battery-powered devices requiring precise undervoltage detection.

For engineers reviewing the STM1061N31WX6F datasheet, STM1061N31WX6F pinout, STM1061N31WX6F application, or STM1061N31WX6F equivalent, this device supports critical power-on reset sequencing, brown-out detection in embedded systems, and transient-immune monitoring of 3.3 V and 3.0 V logic supplies.

Technical Context

The STM1061N31WX6F implements a precision bandgap reference and comparator architecture to detect VCC falling below 3.1 V (VTH–), asserting an open-drain output that sinks up to 22 mA at VCC = 3.0 V. Hysteresis is fixed at 0.02–0.08 × VTH–, ensuring noise immunity during threshold crossing.

It operates across –40 °C to +85 °C with ±100 ppm/°C threshold temperature coefficient and rejects negative-going VCC transients ≤100 µs at 100 mV overdrive. Output remains valid down to 0.7 V VCC, enabling reliable reset assertion during deep brown-out conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Voltage Threshold	3.1 V ±2% at 25 °C - precisely triggers reset when 3.3 V rail drops to 3.038–3.162 V
Supply Current	0.9 µA typ at 3.0 V - enables multi-year battery life in coin-cell–powered IoT sensors
Operating Voltage Range	0.7 V to 6.0 V - ensures functional reset assertion even during severe supply collapse
Output Type	Open-drain active-low - allows wired-OR reset bus sharing and level-shifting to 5 V or 3.3 V domains
Hysteresis	0.062 V min (2% of 3.1 V) - prevents chatter during slow-rising/falling supply transitions
Temperature Range	–40 °C to +85 °C - qualified for industrial and extended-temperature consumer applications
Transient Immunity	Rejects <100 µs negative glitches at 100 mV overdrive - eliminates false resets from switching noise

Pinout & Package

STM1061N31WX6F is housed in a RoHS-compliant SOT23-3 (WX) package with 1.3 mm × 2.8 mm footprint and 0.95 mm height, optimized for space-constrained PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1 (OUT)	Open-drain active-low output	Sinks current when VCC < 3.1 V; requires external pull-up to define logic-high level and voltage domain
2 (VCC)	Supply input and monitored voltage rail	Both powers the detector and serves as the sensed signal; valid operation starts at 0.7 V
3 (VSS)	Ground reference	System ground return path; must be low-impedance to ensure accurate threshold comparison

Key Features

Feature	Design Value
Factory-trimmed threshold	3.1 V set at wafer test with ±2% accuracy - eliminates external resistor network and calibration effort
Ultra-low quiescent current	0.9 µA typical - reduces standby power by >95% vs. discrete Zener-based reset circuits
Guaranteed sub-1 V operation	Valid OUT assertion down to VCC = 0.7 V - ensures deterministic reset before MCU core loses state
Power supply transient immunity	Immune to fast negative VCC glitches ≤100 µs - avoids spurious resets in noisy DC/DC environments
Two standard packages	SOT23-3 (WX) and SOT323-3 (W) - supports both high-density and hand-solderable assembly

Applications

Microcontroller Power-On Reset

Battery Voltage Monitoring

Use Scenario: Ensures clean reset assertion on 3.3 V MCU power-up and detects brown-out during Li-ion discharge.

IC Role / Device Role / Timing Role: Voltage detector providing active-low reset signal synchronized to VCC decay below 3.1 V.

Use Value: Prevents MCU lockup or code execution from corrupted memory by guaranteeing reset until stable 3.3 V is restored.

Use Scenario: Monitors single-cell Li-ion battery (3.0–4.2 V range) to trigger low-battery warning before cutoff.

IC Role / Device Role / Timing Role: Threshold comparator detecting 3.1 V endpoint of usable discharge curve.

Use Value: Enables precise end-of-discharge signaling without software polling or ADC overhead.

DC/DC Converter Supervision

Portable Medical Sensor Reset

Use Scenario: Validates output stability of 3.3 V buck converter after startup and during load transients.

IC Role / Device Role / Timing Role: Independent hardware monitor verifying regulated output meets minimum specification.

Use Value: Adds fail-safe supervision layer beyond converter's internal feedback, improving system reliability.

Use Scenario: Provides deterministic reset for ultra-low-power wearable ECG sensor operating from CR2032.

IC Role / Device Role / Timing Role: Low-current voltage supervisor enabling >5-year shelf life with minimal leakage impact.

Use Value: Delivers guaranteed reset at 3.1 V while consuming only 0.9 µA - preserving battery capacity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV803EB31DBZR	3.1 V threshold, ±1% accuracy, 0.5 µA ICC, SOT23-3 - tighter tolerance but lower drive capability (2 mA sink)	Preferred where higher accuracy outweighs need for strong reset drive into heavy capacitive loads	Select TLV803EB31DBZR if system requires <1% threshold error and reset load capacitance <100 pF
MAX809SEUR+T	3.08 V threshold, ±2.5% accuracy, 12 µA ICC, SOT23-3 - higher supply current, wider tolerance, same package	Suitable for cost-sensitive industrial controls where 3.08 V trip point and relaxed accuracy are acceptable	Select MAX809SEUR+T only if legacy design compatibility or dual-source procurement is required

Compared with TLV803EB31DBZR and MAX809SEUR+T, STM1061N31WX6F delivers optimal balance of 3.1 V precision, ultra-low 0.9 µA supply current, and 22 mA output drive - making it ideal for battery-critical, high-reliability reset applications where both accuracy and robustness matter.

Availability

STM1061N31WX6F is available at Aetrix Electronics and suitable for microcontroller reset, battery monitoring, and DC/DC supervision applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for STM1061N31WX6F 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.

STM1061 belongs to ST's low-power voltage supervisor product line, engineered specifically for deterministic, ultra-low-power reset generation in battery-operated and energy-sensitive embedded systems.

FAQ

What is the exact voltage threshold and tolerance for STM1061N31WX6F?

The STM1061N31WX6F has a factory-trimmed detect voltage (VTH–) of 3.100 V with ±2% accuracy over temperature, meaning the actual threshold falls between 3.038 V and 3.162 V at 25 °C. This is confirmed in Table 9 of the official ST datasheet (Rev 4, July 2006), and the '31' suffix in the part number explicitly denotes the 3.1 V option.

Can STM1061N31WX6F drive a 10 kΩ pull-up resistor reliably?

Yes. With a minimum sink current of 5.0 mA at VCC = 3.0 V (per Table 5), the device pulls OUT to <0.4 V when asserted against a 10 kΩ pull-up to 3.3 V - delivering a solid logic-low with >2.9 V noise margin. This meets standard CMOS input requirements and is validated in Figure 6 and Section 3.1 of the datasheet.

Does STM1061N31WX6F require an external bypass capacitor?

A 0.1 µF ceramic capacitor placed as close as possible to the VCC pin is recommended per Section 3.2 and Figure 11 of the datasheet to enhance immunity against high-frequency transients. While not strictly mandatory for basic functionality, omission increases risk of false resets in noisy switch-mode power supply environments.

Is STM1061N31WX6F compatible with 1.8 V logic systems?

No. Although the device operates down to VCC = 0.7 V, its 3.1 V threshold is fixed and unsuitable for monitoring 1.8 V rails. For 1.8 V systems, ST offers the STM1061N18 variant (1.8 V threshold); using STM1061N31WX6F would assert reset prematurely during normal 1.8 V operation.

STM1061N31WX6F Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 3.1V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 30µs Typical Propagation Delay

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

STM1061N31WX6F FAQ

1.How can I place an order for STM1061N31WX6F through Aetrix?

Please submit a Request for Quotation (RFQ) for STM1061N31WX6F 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 STM1061N31WX6F reliable?

The price and inventory of STM1061N31WX6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM1061N31WX6F is usually 5 days.

3.What payment methods are accepted for STM1061N31WX6F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM1061N31WX6F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM1061N31WX6F?

STM1061N31WX6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM1061N31WX6F 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 STM1061N31WX6F?

For technical support, including STM1061N31WX6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM1061N31WX6F requirements.

6.How does Aetrix verify that STM1061N31WX6F is sourced from the original manufacturer or authorized distributors?

All STM1061N31WX6F 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 STM1061N31WX6F meets industry standards.

7.What is the process for return or replacement of STM1061N31WX6F?

All STM1061N31WX6F units undergo pre-shipment inspection (PSI). If there is an issue with STM1061N31WX6F, 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 STM1061N31WX6F part is unused and in its original packaging.

Return procedure for STM1061N31WX6F:

1.Submit a request within 90 days.

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

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