STMicroelectronics STM1061N26WX6F

Overview

STM1061N26WX6F from STMicroelectronics is a low-power, factory-trimmed voltage detector IC with 2.6V ±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 and battery-powered systems, asserting reset when supply voltage drops below threshold and maintaining assertion until hysteresis-released above VTH+.

For engineers reviewing the STM1061N26WX6F datasheet, STM1061N26WX6F pinout, STM1061N26WX6F application, or STM1061N26WX6F equivalent, this device supports precision brown-out detection in space-constrained embedded systems requiring ultra-low quiescent current, transient immunity, and reliable reset assertion across –40°C to 85°C.

Technical Context

The STM1061N26WX6F integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.6V detect threshold (VTH–), with 0.05×VTH– typical hysteresis (VHYST ≈ 130mV). Its N-channel open-drain output sinks up to 22mA at VCC = 3.0V and VDS = 0.5V, enabling direct interface with microcontroller reset inputs via external pull-up.

It features built-in immunity to negative-going VCC transients ≤100µs at 100mV overdrive, operates continuously from 0.7V to 6.0V supply, and maintains valid output logic state down to VCC = 0.7V - critical for deep-battery-discharge monitoring in wearables and IoT sensors.

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 TLV803EB26DBZR and MAX809SEUR+T, the STM1061N26WX6F uniquely guarantees functional reset assertion down to 0.7V while maintaining sub-µA quiescent current - making it irreplaceable in deep-discharge battery monitoring where other detectors lose output validity.

Availability

STM1061N26WX6F is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, smart home battery door locks, and automotive body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for STM1061N26WX6F 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 microcontrollers, analog ICs, power management, and sensing solutions 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 brown-out detection in battery-operated and energy-constrained embedded systems.

FAQ

What is the exact voltage threshold and tolerance for STM1061N26WX6F?

The STM1061N26WX6F has a factory-trimmed detect threshold (VTH–) of 2.600V with ±2% accuracy at 25°C, corresponding to a guaranteed range of 2.548V to 2.652V. This value is laser-trimmed during production and documented in Table 9 of the official ST datasheet (Rev 4, July 2006). Hysteresis is 0.05×VTH–, yielding ~130mV nominal separation between detect and release thresholds.

Can STM1061N26WX6F operate reliably below 1.0V supply?

Yes - the device is explicitly guaranteed to assert a valid logic-low output down to VCC = 0.7V at 25°C, as stated in the "Features" section and confirmed in Section 3.1 ("Operation"). This capability is validated across the full –40°C to +85°C temperature range per DC characteristics in Table 5, enabling use in deeply discharged battery scenarios where competing detectors fail.

Is an external pull-up resistor required for the OUT pin?

Yes - the OUT pin is an open-drain N-channel MOSFET output and must be pulled up externally to a logic-compatible voltage (≤6.0V). A 10kΩ resistor to 3.3V or 5V is recommended per Figure 6 and Section 3.1. Without pull-up, the output remains floating and cannot drive a defined high state, rendering reset signaling nonfunctional.

Does STM1061N26WX6F support wired-OR reset bus configurations?

Yes - its open-drain active-low output enables direct wired-OR connection with other open-drain reset sources (e.g., multiple voltage supervisors or manual reset buttons) on a shared reset line. This configuration is explicitly supported per Section 3.1 and Figure 6, allowing consolidated reset assertion from several system-level fault conditions without additional logic gates.