Renesas R5F21258SNFP#V2

Overview

R5F21258SNFP#V2 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/25 Group, featuring 64 KB flash program memory, 3 KB RAM, and dual 1 KB data flash blocks for nonvolatile parameter storage. It integrates a 10-bit 12-channel ADC, UART0/UART1, I²C bus interface, hardware LIN module (using timer RA and UART0), and real-time clock (timer RE). It targets embedded control in consumer appliances and office equipment operating at 3.0–5.5 V.

For engineers reviewing the R5F21258SNFP#V2 datasheet, R5F21258SNFP#V2 pinout, R5F21258SNFP#V2 application, or R5F21258SNFP#V2 equivalent, key selection criteria include its 52-pin LQFP package (PLQP0052JA-A), -20°C to +85°C temperature grade (N version), on-chip high-speed oscillator with frequency adjustment, and support for wait/stop low-power modes down to 0.7 µA.

Technical Context

The R5F21258SNFP#V2 implements the R8C/Tiny Series CPU core with 89 fundamental instructions and executes at 50 ns minimum instruction time (20 MHz XIN, 3.0–5.5 V). Its memory architecture separates 64 KB flash program ROM from two independent 1 KB data flash blocks-enabling field-updatable calibration data without erasing application code.

Peripheral integration includes Timer RD (16-bit × 2 channels with input capture/output compare), Timer RE (real-time clock with compare match), and dual UARTs supporting LIN physical layer via UART0 and timer RA. The device uses three clock generation circuits: XIN (external crystal/resonator), XCIN (32 kHz RTC crystal), and on-chip high-/low-speed oscillators-with XIN oscillation stop detection for fail-safe operation.

Key Specifications

Pinout & Package

Package: 52-pin molded-plastic LQFP (PLQP0052JA-A), 0.65 mm pin pitch, 10 mm × 10 mm square body, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit MCU applications.

Compared with R5F21256SNFP, the R5F21258SNFP#V2 provides 32 KB additional program flash for feature-rich firmware; compared with R5F21258SDFP, it trades extended temperature range for lower cost in commercial-grade applications where -20°C minimum suffices.

Availability

R5F21258SNFP#V2 is available at Aetrix Electronics and suitable for home appliance control, office equipment interface, and audio system remote control requiring stable component supply over multi-year production cycles.

Supply support for R5F21258SNFP#V2 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

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and consumer markets.

The R8C/25 Group, including R5F21258SNFP#V2, was designed for cost-sensitive, low-power embedded control in consumer electronics-emphasizing integrated peripherals, flash flexibility, and robustness in commercial temperature environments.

FAQ

What is the maximum operating frequency of the R5F21258SNFP#V2?

The R5F21258SNFP#V2 supports a maximum external crystal frequency of 20 MHz on the XIN pin, achieving a 50 ns minimum instruction execution time at VCC = 3.0–5.5 V. Its on-chip high-speed oscillator is adjustable across 1–20 MHz and does not require external components, enabling flexible clock sourcing for the R5F21258SNFP#V2 in space-constrained designs.

Does the R5F21258SNFP#V2 include hardware support for LIN communication?

Yes, the R5F21258SNFP#V2 integrates a hardware LIN module compliant with LIN 2.0/2.1 specifications, implemented using UART0 and timer RA. This allows the R5F21258SNFP#V2 to serve as a LIN slave node without an external transceiver-reducing bill-of-materials cost and PCB area while maintaining precise timing for LIN frame synchronization.

How many data flash blocks does the R5F21258SNFP#V2 have, and what is their endurance?

The R5F21258SNFP#V2 contains two independent 1 KB data flash blocks, each rated for 10,000 write/erase cycles. This architecture allows one block to be updated while the other remains active-supporting robust firmware update mechanisms and persistent storage of calibration parameters in the R5F21258SNFP#V2 without compromising application code integrity.

What package type and pin count does the R5F21258SNFP#V2 use?

The R5F21258SNFP#V2 is packaged in a 52-pin LQFP (PLQP0052JA-A) with 0.65 mm pin pitch and a 10 mm × 10 mm body. This RoHS-compliant package provides full access to all I/O, analog, and peripheral signals-including 41 general-purpose I/O pins, 12 ADC inputs, and dedicated LIN/I²C/UART pins-making the R5F21258SNFP#V2 suitable for compact, high-integration consumer control boards.

What are the low-power operation modes supported by the R5F21258SNFP#V2?

The R5F21258SNFP#V2 supports wait mode (2.0 µA typical at 3.0 V with 32 kHz XCIN clock) and stop mode (0.7 µA typical at 3.0 V), both retaining RAM contents and allowing wake-up via external interrupt or RTC alarm. These modes make the R5F21258SNFP#V2 ideal for battery-powered remote controls, smart sensors, and other applications demanding extended operational lifetime between charges or replacements.