Renesas R5F21254SDFP#V2

Overview

R5F21254SDFP#V2 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller in the R8C/25 Group, featuring 16 KB flash program memory, 1 KB × 2 data flash blocks (1 KB total), and 1 KB RAM. It operates at up to 20 MHz (50 ns min. instruction time) across 2.2–5.5 V supply, with integrated 10-bit 12-channel ADC, dual UARTs, I²C, LIN, and real-time clock - deployed in industrial control panels requiring deterministic timing and firmware update capability.

For engineers reviewing the R5F21254SDFP#V2 datasheet, R5F21254SDFP#V2 pinout, R5F21254SDFP#V2 application, or R5F21254SDFP#V2 equivalent, key selection criteria include D-version industrial temperature range (−40°C to +85°C), 52-pin LQFP package (PLQP0052JA-A), on-chip data flash endurance (10,000 erase/write cycles), and hardware LIN compliance using UART0 and Timer RA.

Technical Context

This MCU implements the R8C/Tiny CPU core with 89 fundamental instructions and 1 Mbyte address space, supporting single-chip operation without external memory. Its clock system integrates three independent generation circuits: XIN-based (up to 20 MHz), high-speed on-chip oscillator (frequency-adjustable), and XCIN-based 32 kHz real-time clock source.

Peripheral integration includes Timer RD (16-bit × 2 channels with input capture/output compare), Timer RE (real-time clock with compare match), and dedicated LIN module leveraging UART0 and Timer RA - all operating under seven-level priority interrupt architecture with 11 internal, 5 external, and 4 software interrupt sources.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21254SDFP#V2, R5F21256SDFP#V2 offers scalable code density while maintaining identical timing and interface behavior, whereas R5F21244SDFP#V2 removes data flash to reduce cost - both retain full functional compatibility for control-loop execution and peripheral interfacing.

Availability

R5F21254SDFP#V2 is available at Aetrix Electronics and suitable for industrial motor control, smart HVAC systems, and programmable power supplies requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F21254SDFP#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 infrastructure markets.

The R8C/25 Group targets cost-optimized industrial control applications demanding integrated peripherals, data retention, and extended temperature operation - designed specifically for appliance, factory automation, and building management systems.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for R5F21254SDFP#V2?

R5F21254SDFP#V2 achieves a maximum operating frequency of 20 MHz at VCC = 3.0–5.5 V, with minimum instruction execution time of 50 ns. At lower frequencies (10 MHz, 5 MHz), it supports reduced supply voltages down to 2.2 V - enabling flexible power design for battery-powered or mixed-voltage systems.

Does R5F21254SDFP#V2 include on-chip debug capability, and how is it accessed?

Yes, R5F21254SDFP#V2 supports on-chip debugging via the single-wire debug interface. Debug entry is controlled by the MODE pin: pulling MODE low at reset activates debug mode, allowing breakpoint setting, register inspection, and flash programming through Renesas E1/E20 emulators.

How many A/D converter channels does R5F21254SDFP#V2 support, and what is their resolution?

R5F21254SDFP#V2 integrates a single 10-bit successive-approximation A/D converter with 12 analog input channels (AN0–AN11), mapped across P0 and P1 ports. Conversion time is 10 µs typical, supporting sampling rates up to 100 kSPS for sensor monitoring and closed-loop control.

What LIN protocol versions are supported by the hardware LIN module in R5F21254SDFP#V2?

The hardware LIN module in R5F21254SDFP#V2 implements LIN 2.1 and SAE J2602 physical layer compliance using UART0 and Timer RA. It supports automatic header detection, checksum calculation (classic/enhanced), and slave node response timing - eliminating software protocol stack overhead.

Is R5F21254SDFP#V2 pin-compatible with other members of the R8C/25 Group in the same package?

Yes, all R8C/25 Group devices in the PLQP0052JA-A (52-pin LQFP) package - including R5F21254SDFP#V2, R5F21255SDFP#V2, and R5F21256SDFP#V2 - share identical pin assignments, electrical characteristics, and peripheral mapping, enabling seamless capacity upgrades without PCB redesign.