STMicroelectronics STM1061N22WX6F

Overview

STM1061N22WX6F from STMicroelectronics is a low-power, factory-trimmed voltage detector IC with 2.2V ±2% threshold, open-drain active-low output, 0.9µA typical supply current, and guaranteed operation down to VCC = 0.7V. It monitors power rails in portable electronics, microcontroller reset circuits, and battery-powered systems where precision brownout detection and ultra-low quiescent current are critical.

For engineers reviewing the STM1061N22WX6F datasheet, STM1061N22WX6F pinout, STM1061N22WX6F application, or STM1061N22WX6F equivalent, this device delivers verified voltage supervision for 1.6–5.5V supply ranges, hysteresis-controlled release behavior, transient-immune operation, and SOT23-3 package compatibility with standard PCB layout practices.

Technical Context

The STM1061N22WX6F implements a precision bandgap reference and comparator architecture to detect falling VCC below its factory-set 2.2V threshold (VTH–), asserting an open-drain OUT signal until VCC rises above VTH+ = VTH– + VHYST (hysteresis 0.044V typ). Its internal N-channel output driver sinks up to 22mA at VCC = 3.0V and VDS = 0.5V.

Designed for immunity to fast negative-going transients, it tolerates glitches under the curve in Figure 11 (max transient duration vs. overdrive), and guarantees valid logic output down to 0.7V supply-enabling reliable reset assertion during deep brownout conditions common in Li-ion and coin-cell applications.

Key Specifications

Pinout & Package

SOT23-3 (WX) package: 3-pin surface-mount, 2.8mm × 2.1mm footprint, 1.12mm height, lead-free ECOPACK® compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB22DBZR and MAX809SEUR+T, the STM1061N22WX6F uniquely balances ±2% threshold accuracy, 0.9µA ICC, and guaranteed 0.7V operation-making it optimal for battery-critical designs where both precision and deep-undervoltage resilience are required.

Availability

STM1061N22WX6F is available at Aetrix Electronics and suitable for battery-powered microcontroller reset, low-voltage brownout protection, and DC/DC converter output monitoring requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for STM1061N22WX6F 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, digital, and mixed-signal ICs for industrial, automotive, and consumer markets.

The STM1061 series belongs to ST's precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy supply monitoring in space- and energy-constrained portable and embedded systems.

FAQ

What is the exact voltage threshold and tolerance for STM1061N22WX6F?

The STM1061N22WX6F has a factory-trimmed detect voltage (VTH–) of 2.200V with ±2% tolerance at 25°C, corresponding to a range of 2.156V to 2.244V. This is confirmed in Table 9 of the official datasheet (Rev 4, July 2006), and the hysteresis adds ~0.044V to define the release voltage (VTH+).

Can STM1061N22WX6F operate reliably below 1.0V supply?

Yes - the device is explicitly guaranteed to assert its open-drain output correctly down to VCC = 0.7V at 25°C, as stated in the "Features" section and Section 3.1 "Output". This enables robust reset generation even during final battery discharge stages in coin-cell or single-cell Li-ion applications.

What pull-up resistor value is recommended for the open-drain OUT pin?

A 10kΩ pull-up resistor to any supply ≤6V is sufficient in most applications, per Section 3.1. This value ensures logic-high recognition while limiting current draw; values between 4.7kΩ and 100kΩ are viable depending on bus capacitance and noise immunity requirements, but 10kΩ balances speed and power.

Is STM1061N22WX6F pin-compatible with other STM1061 variants?

Yes - all STM1061 variants in SOT23-3 (WX) or SOT323-3 (W) packages share identical pinout (OUT/VCC/VSS), as confirmed in Table 2 and Figures 3–4. Only the threshold voltage (suffix) and package code differ; no PCB redesign is needed when substituting within the same package family.