STMicroelectronics STM1001SBWX6F

Overview

STM1001SBWX6F from STMicroelectronics is a precision voltage supervisor IC designed to monitor 2.85–3.00 V supply rails and assert an active-low open-drain reset signal during brownout or power-up sequencing. It guarantees RST assertion down to VCC = 1.0 V, delivers 30 ms (min) reset pulse width, draws only 6 µA typical supply current, and operates across –40 °C to +85 °C in industrial applications including microcontroller-based embedded systems.

For engineers reviewing the STM1001SBWX6F datasheet, STM1001SBWX6F pinout, STM1001SBWX6F application, or STM1001SBWX6F equivalent, this page provides verified functional identity, SOT23-3 terminal mapping, reset threshold accuracy (2.93 V typ), temperature-stable trec timing, and validated alternatives for 2.9 V supply monitoring in space-constrained MCU reset circuits.

Technical Context

The STM1001SBWX6F implements a comparator-based reset generator with hysteresis-free threshold detection and an internal timer that enforces minimum reset pulse width (trec = 20–40 ms per Option B). Its open-drain RST output requires an external pull-up and remains asserted until VCC exceeds VRST and sustains that level for ≥trec.

It features immunity to short negative VCC transients: a 100 mV overdrive glitch ≤20 µs will not trigger spurious reset, and its reset threshold exhibits only ±45 ppm/°C drift over temperature - critical for stable operation in industrial environments where supply noise and thermal cycling are present.

Key Specifications

Pinout & Package

SOT23-3 (WX) package: 3-pin, surface-mount, lead-free, small outline transistor outline with 0.95 mm pitch and 2.9 mm × 1.3 mm footprint - optimized for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G12DBVR and MAX6373XR29+T, the STM1001SBWX6F uniquely combines 2.93 V precision, 30 ms trec, 6 µA ICC, and guaranteed 1.0 V operation in SOT23-3 - making it the only drop-in solution for industrial 2.9 V brownout protection with minimal footprint and maximum reliability.

Availability

STM1001SBWX6F is available at Aetrix Electronics and suitable for industrial PLC controllers, smart metering units, IoT edge sensor nodes, and POS terminal power sequencing requiring stable component supply and long-term manufacturability.

Supply support for STM1001SBWX6F 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 STM1001 belongs to ST's precision voltage supervisor product line, engineered specifically for reliable power-on reset and brownout detection in resource-constrained embedded systems operating across extended industrial temperatures.

FAQ

What is the exact reset threshold voltage for STM1001SBWX6F?

The STM1001SBWX6F has a nominal reset threshold of 2.93 V at 25 °C, with a guaranteed range of 2.85 V to 3.00 V over the full –40 °C to +85 °C operating temperature range. This value is factory-trimmed and specified in Table 4 of the official datasheet (Doc ID 10373 Rev 6), matching the "S" variant designation in the part numbering scheme.

Does STM1001SBWX6F require an external pull-up resistor on the RST pin?

Yes - the RST output is open-drain and must be pulled up externally to a valid logic-high voltage (e.g., same as MCU I/O rail). The datasheet Figure 4 shows a typical 10 kΩ pull-up to VCC or another supply; absence of this resistor results in undefined RST logic state and failed reset signaling.

Can STM1001SBWX6F operate with VCC below 2.85 V?

Yes - the device guarantees valid RST assertion down to VCC = 1.0 V (per Section 2.1 and Absolute Maximum Ratings table), though the reset threshold specification (2.85–3.00 V) applies only when VCC ≥ 1.2 V. Below 1.2 V, the comparator remains functional but threshold accuracy is not characterized.

What does the "B" in STM1001SBWX6F indicate?

The "B" denotes Option B reset pulse width: trec = 20–40 ms (minimum/typical/maximum), as defined in Table 6 of the datasheet. This contrasts with blank-suffixed variants (e.g., STM1001SWX6F) which provide 140–280 ms trec - allowing designers to select timing granularity based on target MCU reset requirements.