STMicroelectronics STEVAL-IFR002V1

Overview

STEVAL-IFR002V1 from STMicroelectronics is an RTC calibration daughterboard built around the M41T83SQA6F real-time clock IC in QFN16 package, designed for precise timekeeping validation and temperature-compensated RTC characterization when paired with the STEVAL-IFS012V1 motherboard. It supports GUI-driven RTC selection among four supported devices and enables comparative evaluation of QFN-packaged RTC performance under thermal variation.

For engineers reviewing the STEVAL-IFR002V1 datasheet, STEVAL-IFR002V1 pinout, STEVAL-IFR002V1 application, or STEVAL-IFR002V1 equivalent, this board delivers traceable RTC calibration capability, interoperability with multi-sensor temperature demonstration platforms, and hardware-level access to M41T83SQA6F control and timing signals for lab-grade accuracy assessment.

Technical Context

The STEVAL-IFR002V1 implements a dedicated interface between the M41T83SQA6F RTC (QFN16) and the STEVAL-IFS012V1 motherboard via standardized interconnect headers. It provides direct access to VBAT, SQW/OUT, and I²C SDA/SCL pins without level-shifting or buffering, preserving signal integrity for calibration measurements.

Designed exclusively as a plug-in daughterboard, it contains no active regulation or microcontroller - only passive decoupling, pull-up resistors, and footprint-matched layout for the M41T83SQA6F. Its function is strictly mechanical and electrical interfacing: enabling accurate time drift measurement across temperature gradients using the host motherboard's sensor array and GUI.

Key Specifications

Availability

STEVAL-IFR002V1 is available at Aetrix Electronics and suitable for RTC calibration labs, embedded timekeeping validation, and multi-device timing comparison applications requiring stable component supply and documented reference hardware.

Supply support for STEVAL-IFR002V1 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, delivering silicon solutions for automotive, industrial, power, and sensing applications.

This board belongs to ST's STEVAL (ST Evaluation) series - purpose-built reference hardware enabling rapid validation of ST analog, timing, and sensor ICs in system-relevant configurations.

FAQ

Is STEVAL-IFR002V1 a standalone RTC module?

No. It is a daughterboard that requires the STEVAL-IFS012V1 motherboard to operate. It contains no onboard MCU, power supply, or GUI - only the M41T83SQA6F RTC and supporting passives. All control, display, and temperature correlation functions are handled by the host motherboard and its PC software interface.

What RTC IC does STEVAL-IFR002V1 use?

It uses the M41T83SQA6F - a 32.768 kHz I²C real-time clock with integrated crystal, battery-switchover circuitry, programmable square-wave output, and 56 bytes of NV SRAM. The "SQA6F" suffix denotes QFN16 packaging and industrial temperature grade (–40°C to +85°C).

Can STEVAL-IFR002V1 be used without STEVAL-IFS012V1?

No. It lacks power regulation, USB interface, firmware, and GUI stack. Its 0.1-inch male headers are mechanically and electrically designed only for mating with STEVAL-IFS012V1. No alternate host interface or standalone firmware is provided or supported.

Does STEVAL-IFR002V1 include calibration firmware or software?

No. Calibration is performed externally via the STEVAL-IFS012V1 GUI, which reads time drift data from the M41T83SQA6F over I²C and correlates it with on-board temperature sensor readings. The daughterboard itself contains no programmable memory or firmware.