Renesas R5F21272SNFP#X6

Overview

R5F21272SNFP#X6 from Renesas Electronics is a 16-bit R8C/27 Group single-chip microcontroller with 8 KB flash program memory, 1 KB × 2 on-chip data flash, 512 bytes RAM, and 32-pin LQFP (PLQP0032GB-A) packaging. It integrates an R8C CPU core, 12-channel 10-bit A/D converter, dual UARTs, I²C interface, hardware LIN module, and real-time clock timer (Timer RE), targeting embedded control in consumer and industrial appliances.

For engineers reviewing the R5F21272SNFP#X6 datasheet, R5F21272SNFP#X6 pinout, R5F21272SNFP#X6 application, or R5F21272SNFP#X6 equivalent, key selection criteria include its N-version temperature range (−20 to +85°C), 20 MHz max operating frequency at 3.0–5.5 V, low-power stop mode (0.7 µA), and dual-block data flash for reliable parameter storage in field-upgradable systems.

Technical Context

The R5F21272SNFP#X6 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 8 KB program flash from two independent 1 KB data flash blocks-enabling simultaneous code execution and nonvolatile parameter updates without halting operation.

Peripheral integration includes Timer RC (16-bit input capture/output compare), Timer RE (real-time clock with compare match), hardware LIN over UART0+Timer RA, and dual UARTs supporting full-duplex asynchronous communication. The 12-channel 10-bit A/D converter supports internal reference (VREF) and operates across the full supply range (2.2–5.5 V).

Key Specifications

Pinout & Package

Package: 32-pin molded-plastic LQFP (PLQP0032GB-A), 7 mm × 7 mm, 0.8 mm pitch, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21272SNFP#X6, R5F21274SNFP offers scalable code memory while retaining identical data flash and low-power features, whereas R5F21262SNFP sacrifices on-chip data persistence-requiring external storage for configuration retention and increasing system complexity.

Availability

R5F21272SNFP#X6 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, and automotive body electronics requiring stable component supply across extended production lifecycles.

Supply support for R5F21272SNFP#X6 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 enterprise applications.

The R8C/27 Group, including R5F21272SNFP#X6, was designed for cost-sensitive, low-power embedded control in consumer appliances and industrial equipment-emphasizing integrated peripherals, flash flexibility, and robust qualification across −20°C to +85°C.

FAQ

What is the maximum operating frequency and supply voltage range for R5F21272SNFP#X6?

R5F21272SNFP#X6 operates up to 20 MHz at a supply voltage of 3.0–5.5 V. It also supports lower frequencies down to 5 MHz at 2.2–5.5 V, enabling flexible power management in battery-powered or wide-input designs. The N-version rating confirms −20°C to +85°C ambient operation under these conditions. All electrical characteristics in the official Renesas datasheet REJ03B0168-0210 apply directly to R5F21272SNFP#X6.

Does R5F21272SNFP#X6 include on-chip data flash, and how is it structured?

Yes, R5F21272SNFP#X6 includes 1 KB × 2 on-chip data flash-two independent 1 KB blocks. This structure allows one block to be erased and rewritten while the other remains active for runtime parameter access, enabling wear-leveling and atomic updates. Data flash endurance is rated at 10,000 erase/write cycles per block, distinct from the 1,000-cycle limit of program flash. This capability is exclusive to the R8C/27 Group and not present in R8C/26 variants like R5F21262SNFP.

Can R5F21272SNFP#X6 operate as a LIN bus slave node without external transceivers?

R5F21272SNFP#X6 integrates a hardware LIN module that combines UART0 and Timer RA to implement LIN 2.1 physical layer signaling-however, it does not include the LIN bus driver/receiver circuitry. An external LIN transceiver (e.g., TJA1020) is required for bus-level compliance. The MCU handles protocol framing, checksum, and scheduling; the transceiver handles voltage level translation and fault protection. This split architecture balances integration and robustness.

What are the low-power modes supported by R5F21272SNFP#X6, and what is the typical current in stop mode?

R5F21272SNFP#X6 supports wait mode (2.0 µA typical at 3.0 V, f(XCIN) = 32 kHz) and stop mode (0.7 µA typical at 3.0 V). In stop mode, the CPU, clocks, and most peripherals halt while retaining RAM content and allowing wake-up via RESET, INT0–INT3, or Timer RE compare match. This ultra-low quiescent current enables multi-year operation on coin-cell batteries in sensor applications-verified in Renesas characterization data REJ03B0168-0210.

Is the R5F21272SNFP#X6 pin-compatible with other R8C/27 Group MCUs such as R5F21274SNFP?

Yes, R5F21272SNFP#X6 is fully pin-compatible with all R8C/27 Group members in the PLQP0032GB-A package-including R5F21274SNFP, R5F21275SNFP, and R5F21276SNFP. They share identical pin assignments, electrical characteristics, and peripheral mappings. Firmware developed for R5F21272SNFP#X6 runs unmodified on higher-memory variants, enabling seamless scalability during product development or volume ramp.