STMicroelectronics STM6510SCACDG6F

Overview

STM6510SCACDG6F 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 (1.575–4.625 V), active-low open-drain RST output, and 1.4 µA supply current at 3.0 V. It operates from 1.0 V to 5.5 V across –40 °C to +85 °C and uses TDFN8 (2 mm × 2 mm) packaging for space-constrained portable electronics.

For engineers reviewing the STM6510SCACDG6F datasheet, STM6510SCACDG6F pinout, STM6510SCACDG6F application, or STM6510SCACDG6F equivalent, this device delivers precise dual-button reset arbitration with user-defined timing, undervoltage monitoring, and industrial-grade reliability in ultra-low-power mobile system management.

Technical Context

The STM6510 implements dual Smart Reset™ inputs (SR0/SR1) requiring simultaneous low assertion for ≥tSRC before triggering RST-preventing spurious resets from brief button presses. Its internal 65 kΩ pull-up resistors on SR0/SR1 eliminate external biasing components.

Reset pulse width tREC and setup delay tSRC are independently programmed via external capacitors on TRECADJ and SRC pins, respectively, with linear scaling (e.g., tREC = 10–20 ms per 0.001 µF). The device also monitors VCC against a factory-selected threshold (e.g., "S" option = 2.925 V ±2.5%) and asserts RST during undervoltage events plus full tREC recovery.

Key Specifications

Pinout & Package

TDFN8 package: 2 mm × 2 mm × 0.75 mm body, 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-pushbutton reset management applications.

Compared with MAX6326TUT+T and TPS3808G12DBVR, the STM6510SCACDG6F uniquely provides hardware-enforced dual-button validation with independent capacitor-programmed tSRC and tREC-enabling robust, zero-software reset arbitration ideal for consumer handhelds demanding fail-safe user recovery paths.

Availability

STM6510SCACDG6F is available at Aetrix Electronics and suitable for mobile phones, e-books, and portable navigation devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant TDFN packaging.

Supply support for STM6510SCACDG6F 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 specializing in microcontrollers, power management, and analog/mixed-signal ICs for automotive, industrial, and consumer markets.

The STM65xx Smart Reset™ product line targets portable electronics requiring glitch-immune, capacitor-programmable reset timing with dual-button arbitration-designed specifically to replace discrete RC networks and reduce MCU GPIO usage in battery-powered devices.

FAQ

What is the minimum recommended capacitor value for tSRC programming?

The datasheet specifies a minimum CSRC of 0.01 µF to ensure accurate tSRC timing. Using smaller values increases sensitivity to leakage current and PCB parasitics, potentially causing premature or inconsistent reset activation. Ceramic or film capacitors with low DC leakage are mandatory-electrolytic or high-ESR types will degrade timing precision.

Can SR0 and SR1 be used independently for separate functions?

No-SR0 and SR1 are logically ANDed internally; both must be held low simultaneously for ≥tSRC to assert RST. They cannot operate as independent reset inputs. However, the application note shows SR0/SR1 can be connected to MCU interrupt pins to provide early notification of button press before full tSRC elapses, enabling software-based soft-reset responses.

How does the VCC undervoltage reset interact with tREC timing?

When VCC falls below the selected VRST threshold, RST is immediately asserted and remains active for the full tREC duration after VCC rises back above VRST. This ensures the reset pulse persists through supply recovery transients-critical for preventing partial initialization in processors sensitive to voltage droop during power-up sequences.

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

The NC pin is not internally bonded and must be connected to VSS per ST's layout guidelines. Leaving it floating risks noise coupling into adjacent pins (especially SRC and TRECADJ), which may distort capacitor-based timing. Grounding NC improves thermal dissipation and maintains consistent TDFN8 package impedance characteristics.