STMicroelectronics STM6710KWB6F

Overview

STM6710KWB6F from STMicroelectronics is a quad-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring V1IN = 1.8 V (–10% tolerance), V2IN as supply and monitored voltage, V3IN and V4IN as adjustable inputs with 0.62 V internal threshold (±1.5%), delivering 200 ms reset timeout, <35 µA quiescent current, and open-drain RESET output valid down to V1IN or V2IN = 1 V - used in multi-rail server power sequencing.

For engineers reviewing the STM6710KWB6F datasheet, STM6710KWB6F pinout, STM6710KWB6F application, or STM6710KWB6F equivalent, key selection criteria include triple/quad voltage monitoring flexibility, factory-trimmed 1.8 V (–10%) threshold accuracy, SOT23-6 footprint compatibility, reset timeout timing stability across –40 to +85 °C, and immunity to supply transients in telecom and computing systems.

Technical Context

The STM6710KWB6F operates as a quad-supply monitor where V1IN is factory-set to 1.8 V (–10% threshold = 1.53–1.62 V), V2IN serves as both power supply and monitored rail (1.2–5.5 V operating range), and V3IN/V4IN accept adjustable thresholds via external resistor dividers referenced to 0.62 V ±1.5%. It asserts active-low RESET when any input falls below its trip point.

RESET remains asserted for 140–280 ms (typ. 200 ms) after all voltages recover above thresholds; the open-drain output features a weak 10 µA internal pull-up to V2IN and supports external pull-up to up to 5.5 V without reverse current flow. Hysteresis is 0.3% of threshold voltage to suppress noise-induced oscillation.

Key Specifications

Pinout & Package

Package: SOT23-6 (WB), 2.8 × 1.5 mm footprint, RoHS-compliant, ECOPACK® tape-and-reel (3000 pcs/reel).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G18DBVR and MAX6816EUT+T, STM6710KWB6F uniquely integrates factory-trimmed 1.8 V (–10%) supervision with two fully adjustable inputs and quad-rail coordination in one SOT23-6 package - enabling compact, flexible, and cost-efficient multi-rail reset architecture.

Availability

STM6710KWB6F is available at Aetrix Electronics and suitable for server/workstation power sequencing, telecom line card supervision, and notebook platform reset applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM6710KWB6F 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, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.

The STM67xx series was developed specifically for high-accuracy, low-power multi-rail voltage supervision in space-constrained computing and communications equipment - emphasizing precision threshold matching, transient immunity, and SOT23-6 integration.

FAQ

What is the exact reset threshold voltage for V1IN on STM6710KWB6F?

The V1IN threshold is factory-set to 1.8 V with –10% tolerance, resulting in a guaranteed trip range of 1.53 V (min) to 1.62 V (max) at 25 °C, with ±0.05 V drift over –40 to +85 °C per datasheet Table 5. This applies exclusively to the K-suffix variant and is not user-adjustable.

Can V3IN and V4IN monitor the same voltage simultaneously?

Yes - V3IN and V4IN share the same 0.62 V internal reference and can be independently configured with identical or different resistor dividers. Each input drives its own comparator, so simultaneous monitoring of duplicate rails (e.g., dual 3.3 V domains) is supported without interaction.

Does STM6710KWB6F require an external pull-up resistor on RESET?

No external pull-up is required: the device includes a 10 µA internal weak pull-up to V2IN. An external pull-up may be added only if interfacing with a higher-voltage logic domain (e.g., 5 V MCU), and the internal circuitry prevents reverse current into V2IN per Figure 5 in the datasheet.

How does the 200 ms reset timeout behave if V2IN drops and recovers first?

The 200 ms timeout starts only after *all* monitored inputs (V1IN, V2IN, V3IN, V4IN) rise above their respective thresholds. If V2IN recovers early but V1IN remains below 1.53 V, RESET stays asserted until V1IN also stabilizes - ensuring full system readiness before release.