Renesas R5F21274SDFP#V2

Overview

R5F21274SDFP#V2 from Renesas Electronics is a 16-bit R8C/27 Group single-chip microcontroller with 16 KB flash program memory, 1 KB × 2 blocks of on-chip data flash, 1 KB RAM, and 32-pin LQFP (PLQP0032GB-A) packaging. It integrates a 10-bit 12-channel ADC, dual UARTs, I²C interface, hardware LIN module, four 8-/16-bit timers, and operates across −40°C to +85°C for industrial-grade embedded control in appliance and automotive subsystems.

For engineers reviewing the R5F21274SDFP#V2 datasheet, R5F21274SDFP#V2 pinout, R5F21274SDFP#V2 application, or R5F21274SDFP#V2 equivalent, key selection considerations include its D-version temperature grade, dual UART + I²C + LIN connectivity, 1 KB × 2 data flash endurance (10,000 erase/write cycles), and 32-pin LQFP footprint compatibility within the R8C/27 family.

Technical Context

The R5F21274SDFP#V2 implements the R8C 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 16 KB program flash from two independent 1 KB data flash blocks-enabling simultaneous code execution and nonvolatile parameter storage without interrupting operation.

Peripheral integration includes Timer RE with real-time clock capability (D-version), XCIN/XCOUT 32 kHz crystal support, and hardware LIN bus compliance via UART0 and Timer RA. All I/O ports are CMOS-compatible with programmable pull-up resistors and LED drive capability on P1_0–P1_7.

Key Specifications

Pinout & Package

32-pin molded-plastic LQFP package (PLQP0032GB-A), 7 mm × 7 mm body, 0.8 mm lead pitch, exposed pad not present. Pin 1 marked by dot or bevelled corner per JEDEC standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21274SNFP, the R5F21274SDFP#V2 adds guaranteed −40°C startup and operation-critical for under-hood or outdoor equipment-while retaining full data flash and LIN capability. Against R5F21274JFP, it provides XCIN/XCOUT-based RTC support essential for time-stamped logging or scheduled wake-up, making it the optimal choice for industrial HMIs and smart appliance controllers requiring both ruggedness and timekeeping.

Availability

R5F21274SDFP#V2 is available at Aetrix Electronics and suitable for home appliance control, automotive body electronics, office equipment, and industrial HMI panels requiring stable component supply and long-term production continuity.

Supply support for R5F21274SDFP#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 R5F21274SDFP#V2-is designed for cost-sensitive, resource-constrained embedded control applications demanding integrated analog, communication, and nonvolatile data storage in a compact 32-pin package.

FAQ

What is the maximum operating frequency and supply voltage range for R5F21274SDFP#V2?

R5F21274SDFP#V2 supports a maximum XIN clock frequency of 20 MHz at VCC = 3.0–5.5 V. Its supply voltage range is 2.2–5.5 V for 5 MHz operation, scaling up to 3.0–5.5 V at 20 MHz. The D-version rating ensures stable function across −40°C to +85°C ambient conditions, with typical current draw of 10 mA at 5.0 V/20 MHz and 0.7 µA in stop mode.

Does R5F21274SDFP#V2 include hardware LIN support, and how is it implemented?

Yes, R5F21274SDFP#V2 implements hardware LIN 2.0/2.1 compliance using UART0 combined with Timer RA for accurate baud rate generation and sync field detection. This offloads LIN protocol handling from firmware, enabling deterministic response times and reducing CPU utilization-critical for real-time automotive body control nodes where R5F21274SDFP#V2 serves as a certified LIN slave device.

How many data flash blocks does R5F21274SDFP#V2 have, and what is their endurance rating?

R5F21274SDFP#V2 contains two independent 1 KB data flash blocks, each rated for 10,000 erase/write cycles. This architecture allows one block to remain active for parameter storage while the other is being rewritten-enabling robust field-updatable configuration storage, calibration data retention, and event logging without halting application execution.

What is the role of XCIN/XCOUT pins on R5F21274SDFP#V2, and are they available in all versions?

XCIN and XCOUT on R5F21274SDFP#V2 support a 32 kHz crystal for Timer RE's real-time clock function, enabling calendar timekeeping and periodic wake-up from low-power modes. These pins are exclusive to N- and D-versions per Renesas documentation; J- and K-versions omit XCIN/XCOUT and do not support hardware RTC, making R5F21274SDFP#V2 the only D-version variant with this capability.

Can R5F21274SDFP#V2 operate as an I²C master and slave simultaneously?

R5F21274SDFP#V2 supports I²C bus interface in both master and slave modes via shared SCL/SDA pins, with programmable clock speed up to 100 kbps (standard mode). Its I²C module includes arbitration logic and acknowledge control, allowing R5F21274SDFP#V2 to manage multiple slave devices while also responding to commands from a higher-level controller-ideal for hierarchical sensor networks in industrial HMIs.