STMicroelectronics STM6510WCACDG6F

Overview

STM6510WCACDG6F from STMicroelectronics is a dual push-button Smart Reset™ IC with capacitor-adjustable reset setup delay (tSRC) and reset pulse duration (tREC), factory-programmable VCC threshold (2.925 V typ.), 1.4 µA supply current, and TDFN8 package. It provides active-low open-drain RST output and monitors VCC for undervoltage detection in portable electronics requiring robust, delayed-reset user interaction.

For engineers reviewing the STM6510WCACDG6F datasheet, STM6510WCACDG6F pinout, STM6510WCACDG6F application, or STM6510WCACDG6F equivalent, this page delivers verified timing parameters (tSRC up to 20 s, tREC up to 2.24 s), dual SR input logic behavior, VCC threshold options (S-option = 2.925 V), low-power operation down to 1.0 V, and TDFN8 mechanical compatibility data - all critical for handheld device power management design.

Technical Context

The STM6510 implements dual Smart Reset™ inputs (SR0/SR1) that require simultaneous low assertion for ≥tSRC to trigger RST, preventing spurious resets from brief button presses. Its internal comparator monitors VCC against a factory-set threshold (S option: 2.925 V ±2.5% over –40 °C to +85 °C) and asserts RST during undervoltage events.

Reset pulse width (tREC) and setup delay (tSRC) are independently programmed via external capacitors on TRECADJ and SRC pins, with linear scaling: tREC = 15,000 × CtREC (ms), tSRC = 15 × CSRC (s). Both counters require ≥10 ms discharge intervals between activations to maintain accuracy.

Key Specifications

Pinout & Package

TDFN8 package: 2 mm × 2 mm × 0.75 mm, 0.5 mm pitch, no thermal pad, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual push-button reset applications.

Compared with MAX6816EUS+T and TPS3808G18DBVR, the STM6510WCACDG6F uniquely integrates dual-button validation, field-tunable tSRC/tREC, and factory-set VCC threshold in one TDFN8 package - making it the sole solution for portable devices requiring intentional, user-controlled hard reset with power-fail protection.

Availability

STM6510WCACDG6F is available at Aetrix Electronics and suitable for mobile phones, e-books, and MP3 players requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging for global consumer electronics manufacturing.

Supply support for STM6510WCACDG6F 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, specializing in microcontrollers, power management, and analog ICs for automotive, industrial, and consumer markets.

The STM65xx Smart Reset™ product line targets portable electronics requiring robust, user-intent-validated reset functionality - specifically engineered to eliminate spurious resets while enabling deterministic recovery in battery-powered devices.

FAQ

What is the minimum external capacitor value for tSRC programming?

The datasheet specifies a recommended minimum CSRC of 0.01 µF to ensure timing accuracy and stability. Using smaller values increases sensitivity to leakage currents and PCB parasitics, potentially causing tSRC drift beyond ±25% tolerance. Ceramic or film capacitors with low DC bias and leakage characteristics are mandatory.

Can SR0 and SR1 be used independently for separate functions?

No - the STM6510 requires both SR0 and SR1 to be asserted low simultaneously for at least tSRC to trigger RST. The internal logic performs ANDed validation; using them separately will not generate a reset pulse. For independent button functions, external logic or a different IC (e.g., STM6513) is required.

How does the S-threshold option (2.925 V) behave during temperature variation?

The S-threshold has ±2.5% variation over –40 °C to +85 °C, meaning VRST ranges from 2.852 V to 2.998 V across temperature. At 25 °C, tolerance tightens to ±2.0% (2.867 V to 2.984 V), as confirmed in Table 7 of the datasheet - critical for systems operating near the MCU's brown-out threshold.

Is the NC pin electrically isolated or should it be grounded?

The NC pin is not bonded internally but must be connected to VSS (ground) per Section 1.3.2 and Figure 2 of the datasheet. Leaving it floating risks mechanical instability during reflow and degrades ESD performance; grounding ensures package integrity and meets ST's assembly recommendations.