STMicroelectronics STM1061N28WX6F

Overview

STM1061N28WX6F from STMicroelectronics is a low-power, factory-trimmed voltage detector IC with 2.8V ±2% threshold, open-drain active-low output, 0.9µA typical supply current at 3.0V, guaranteed operation down to VCC = 0.7V, and –40°C to +85°C temperature range. It monitors battery or regulated supply rails in portable electronics to assert reset signals during undervoltage conditions.

For engineers reviewing the STM1061N28WX6F datasheet, STM1061N28WX6F pinout, STM1061N28WX6F application, or STM1061N28WX6F equivalent, this device serves as a precision, ultra-low-quiescent supervisor for microcontroller reset generation, power sequencing validation, and brown-out detection in space-constrained embedded systems.

Technical Context

The STM1061 employs an internal precision voltage reference and comparator to continuously monitor VCC against a fixed 2.8V detect threshold (VTH–), with hysteresis of 0.056V (2% of VTH–) ensuring noise immunity and clean release behavior. Its N-channel open-drain output sinks current only when asserted, requiring an external pull-up to any voltage ≤6V.

It features transient immunity against negative-going VCC glitches up to 100µs at 100mV overdrive, operates across 0.7–6.0V supply range, and maintains valid output logic state even as VCC collapses to 0.7V - enabling reliable reset assertion during deep brown-out events.

Key Specifications

Pinout & Package

STM1061N28WX6F is housed in a RoHS-compliant SOT23-3 (SC-59) package with gull-wing leads, 1.3mm body height, and 2.8mm × 2.1mm footprint - optimized for automated placement and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB28DBZR and MAX809SEUR+T, STM1061N28WX6F uniquely combines ultra-low IQ, guaranteed sub-1V reset assertion, and open-drain flexibility - making it optimal for battery-critical and multi-rail embedded systems where reliability under extreme voltage stress is non-negotiable.

Availability

STM1061N28WX6F is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, wireless sensor nodes, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM1061N28WX6F 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, power management ICs, sensors, and analog products for industrial, automotive, and consumer markets.

STM1061 belongs to ST's low-power voltage supervisor product line, engineered specifically for robust, zero-calibration power monitoring in battery-operated and harsh-environment embedded systems.

FAQ

What is the exact voltage threshold and tolerance for STM1061N28WX6F?

The STM1061N28WX6F has a factory-trimmed detect threshold (VTH–) of 2.800 V with ±2% accuracy over –40°C to +85°C, corresponding to a min/max range of 2.744 V to 2.856 V at 25°C per Table 9 of the datasheet. This tolerance is guaranteed across temperature and supply voltage variations.

Can STM1061N28WX6F drive a reset pin directly without external components?

No - its open-drain output requires an external pull-up resistor to a valid logic-high voltage (≤6V). A 10kΩ resistor to 3.3V is typical; value selection must ensure sufficient current for the target MCU's reset pin leakage and input capacitance while maintaining valid logic levels under worst-case sink conditions (≥1mA at VDS = 0.5V).

Does STM1061N28WX6F support operation during battery voltage collapse?

Yes - it guarantees correct output logic state down to VCC = 0.7V at 25°C, meaning the active-low reset signal remains asserted even as the supply collapses fully, preventing MCU lockup or undefined behavior during deep brown-out events common in primary battery applications.

Is STM1061N28WX6F pin-compatible with other ST voltage detectors?

Yes - all STM1061 variants (e.g., STM1061N26WX6F, STM1061N33WX6F) share identical SOT23-3 pinout (OUT/VCC/VSS), allowing drop-in replacement across threshold options without PCB redesign, provided the application's timing and hysteresis requirements remain satisfied.