STMicroelectronics STM1061N38WX6F

Overview

STM1061N38WX6F from STMicroelectronics is a low-power, factory-trimmed voltage detector IC with 3.8V ±2% detection threshold, open-drain active-low output, 0.9µA typical supply current at 3.0V, and guaranteed operation down to VCC = 0.7V. It monitors power rails in portable and battery-powered systems, asserting reset when supply drops below threshold and maintaining assertion through hysteresis (VHYST ≈ 0.076V) until VCC rises above release voltage (VTH+ = 3.876V).

For engineers reviewing the STM1061N38WX6F datasheet, STM1061N38WX6F pinout, STM1061N38WX6F application, or STM1061N38WX6F equivalent, this device serves as a precision, ultra-low-quiescent monitoring solution for microcontroller reset supervision, DC/DC converter enable control, and brown-out detection in space-constrained embedded designs.

Technical Context

The STM1061N38WX6F implements a precision bandgap reference and comparator architecture to detect VCC falling below 3.8V (VTH–), with hysteresis of 0.02–0.08×VTH– ensuring noise immunity. Its N-channel open-drain output sinks up to 30mA at VCC = 5.0V and VDS = 0.5V, and remains functional down to 0.7V supply.

It features transient immunity against negative-going VCC glitches - maximum allowable pulse width decreases as overdrive increases - and operates across –40°C to +85°C with ±100 ppm/°C threshold temperature coefficient. Detect delay (tPD) is 25µs typ, release delay (tPR) is 30–200µs depending on temperature and threshold.

Key Specifications

Pinout & Package

SOT23-3 package: 3-pin, surface-mount, lead-free ECOPACK® compliant, 2.9 mm × 1.3 mm × 1.0 mm body height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB38DBZR and MAX809SEUR+T, the STM1061N38WX6F uniquely balances 3.8V precision, sub-1µA ICC, and 30mA sink capability - making it optimal for battery-sensitive systems needing robust reset assertion without external buffering.

Availability

STM1061N38WX6F is available at Aetrix Electronics and suitable for microcontroller reset supervision, DC/DC enable control, and portable device power sequencing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for STM1061N38WX6F 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, microcontroller, power, and sensing solutions for industrial, automotive, and consumer markets.

The STM1061 series belongs to ST's precision voltage monitoring product line, engineered specifically for ultra-low-power, high-accuracy reset and enable functions in space-constrained, battery-operated, and industrial-grade embedded systems.

FAQ

What is the exact detection threshold voltage and its tolerance for STM1061N38WX6F?

The STM1061N38WX6F has a factory-trimmed detect threshold (VTH–) of 3.800 V with ±2% accuracy at 25°C, corresponding to a range of 3.724 V to 3.876 V. This is confirmed in Table 9 of the official ST datasheet (Rev 4, July 2006), where suffix "38" explicitly denotes the 3.8V option. The hysteresis adds ~0.076 V, yielding a release threshold (VTH+) of approximately 3.876 V.

Can STM1061N38WX6F drive a 10kΩ pull-up resistor to 5V while asserting reset?

Yes. With VCC = 3.0V and VDS = 0.5V, the device sinks 5.0–22 mA (Table 5), well above the 0.5 mA required for a 10kΩ pull-up to 5V. Even at VCC = 1.0V, it delivers 1.0–1.7 mA - sufficient to maintain a solid logic-low (<0.4V) on standard CMOS inputs. No external buffer is needed for typical MCU reset inputs.

Does STM1061N38WX6F remain functional during rapid VCC transients?

Yes. The device is designed to ignore negative-going VCC transients per Figure 11. For example, a 3.4V threshold part tolerates ≤100 µs glitches at 100 mV overdrive; the 3.8V variant exhibits comparable immunity. A 0.1 µF bypass capacitor placed near the VCC pin further enhances rejection of high-frequency noise and supply coupling.

Is the SOT23-3 package of STM1061N38WX6F lead-free and RoHS-compliant?

Yes. The "F" suffix in STM1061N38WX6F indicates ECOPACK® packaging - ST's lead-free, RoHS-compliant, halogen-free solution. Mechanical data in Table 6 and Section 7 confirm compliance with JEDEC JESD97, and the inner box label marks second-level interconnect as lead-free per environmental standards.