Renesas R5F21274SNFP#V2

Overview

R5F21274SNFP#V2 from Renesas Electronics is a 16-bit R8C/27 Group single-chip microcontroller with 16 KB flash program memory, 1 KB × 2 on-chip data flash, 1 KB RAM, 10-bit 12-channel ADC, and integrated LIN module. It operates at up to 20 MHz (50 ns min instruction time), supports -20°C to +85°C ambient temperature (N version), and targets embedded control in consumer appliances and industrial equipment.

For engineers reviewing the R5F21274SNFP#V2 datasheet, R5F21274SNFP#V2 pinout, R5F21274SNFP#V2 application, or R5F21274SNFP#V2 equivalent, key selection criteria include its dual-block data flash endurance (10,000 erase/write cycles), hardware LIN bus support via UART0 and Timer RA, real-time clock capability (Timer RE), and 32-pin LQFP package with 25 general-purpose I/O pins.

Technical Context

The R5F21274SNFP#V2 implements the R8C CPU core with 89 fundamental instructions and a 1 Mbyte address space. Its memory subsystem includes separate program ROM and dual 1 KB data flash blocks-enabling reliable firmware updates and parameter storage without erasing application code.

Peripheral integration includes two UART channels (UART0/UART1), one I²C interface, one clock-synchronous serial I/O with chip select, four 8/16-bit timers (RA, RB, RC, RE), watchdog timer, and interrupt controller with 7 priority levels. The LIN module is implemented in hardware using UART0 and Timer RA, eliminating software protocol overhead.

Key Specifications

Pinout & Package

Package: 32-pin molded-plastic LQFP (PLQP0032GB-A), RoHS-compliant, surface-mountable with standard reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21274SNFP#V2, R5F21274SDFP offers wider temperature tolerance without changing PCB layout, while R5F21276SNFP provides scalable memory headroom-both retain identical pinout, peripheral register mapping, and toolchain compatibility.

Availability

R5F21274SNFP#V2 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, and office equipment requiring stable component supply and long-term production continuity.

Supply support for R5F21274SNFP#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 automotive, industrial, and IoT markets.

The R8C/27 Group, including R5F21274SNFP#V2, was designed for cost-sensitive, low-power embedded control applications demanding integrated analog peripherals, LIN connectivity, and robust flash memory architecture.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for R5F21274SNFP#V2?

R5F21274SNFP#V2 achieves a minimum instruction execution time of 50 ns at 20 MHz, requiring VCC = 3.0 to 5.5 V. At lower frequencies (10 MHz, 5 MHz), it supports down to 2.2 V, enabling ultra-low-voltage operation in battery-powered designs where R5F21274SNFP#V2 maintains full peripheral functionality.

Does R5F21274SNFP#V2 support hardware LIN communication, and how is it implemented?

Yes, R5F21274SNFP#V2 integrates a hardware LIN module using UART0 and Timer RA to meet LIN 2.0/2.1 physical layer specifications. This offloads LIN frame generation and timing from firmware, ensuring accurate baud rate (±1.5% tolerance) and reducing CPU utilization by eliminating bit-banged software implementations-critical for deterministic R5F21274SNFP#V2 real-time performance.

How many analog input channels does the 10-bit ADC in R5F21274SNFP#V2 support, and are they multiplexed with GPIO?

The R5F21274SNFP#V2 features a single 10-bit successive-approximation ADC with 12 dedicated analog input channels (AN0–AN11). These pins are shared with general-purpose I/O ports P0_0–P0_7, P1_0–P1_3, and P3_5, but function as analog inputs only when configured via the ADPC register-ensuring flexible pin reuse without signal contention in R5F21274SNFP#V2 system design.

What is the endurance rating of the data flash memory in R5F21274SNFP#V2, and how is it structured?

R5F21274SNFP#V2 contains two independent 1 KB data flash blocks, each rated for 10,000 erase/write cycles. This structure allows one block to be rewritten while the other executes code or stores active parameters-enabling safe firmware updates and nonvolatile data logging in R5F21274SNFP#V2 applications without halting system operation.

Which package type and footprint does R5F21274SNFP#V2 use, and is it compatible with standard reflow processes?

R5F21274SNFP#V2 uses the PLQP0032GB-A 32-pin LQFP package: 7 mm × 7 mm body, 0.8 mm lead pitch, exposed pad optional. It complies with JEDEC J-STD-020 moisture sensitivity level 3 and is qualified for standard Pb-free reflow profiles (peak 260°C), ensuring reliable R5F21274SNFP#V2 assembly in high-volume manufacturing environments.