Renesas R5F21262SDFP#X6

Overview

R5F21262SDFP from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/26 Group, featuring an R8C CPU core, 8 KB flash program memory, 512 bytes RAM, and operating at up to 20 MHz (V_CC = 3.0–5.5 V). 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. It targets embedded control in industrial sensors and appliance motor drives.

For engineers reviewing the R5F21262SDFP datasheet, R5F21262SDFP pinout, R5F21262SDFP application, or R5F21262SDFP equivalent, key selection considerations include its D-version temperature grade (–40°C to +85°C), absence of on-chip data flash (distinguishing it from R8C/27 Group), LQFP-32 package compatibility, and support for LIN bus via timer RA and UART0.

Technical Context

The R5F21262SDFP implements the R8C CPU core with 89 fundamental instructions and executes at minimum 50 ns per instruction under 20 MHz XIN clock (V_CC = 3.0–5.5 V). Its memory map spans 1 Mbyte, with fixed interrupt vectors at 0FFDCh–0FFFFh and SFRs mapped to 00000h–002FFh.

Peripheral integration includes UART0/UART1 with clock-synchronous serial I/O capability, I²C bus interface (SCL/SDA), hardware LIN using timer RA and UART0, and a real-time clock function in timer RE - enabled only in N/D versions via XCIN/XCOUT (32 kHz crystal support).

Key Specifications

Pinout & Package

Package: 32-pin molded-plastic LQFP (PLQP0032GB-A, 7 mm × 7 mm, 0.8 mm pitch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21262SNFP, the R5F21262SDFP offers wider industrial temperature tolerance but same peripheral set; compared with R5F21272SDFP, it omits data flash - reducing cost and simplifying EEPROM emulation logic while retaining full program execution capability.

Availability

R5F21262SDFP is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance motor drives, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F21262SDFP 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, and power solutions for industrial, automotive, and IoT applications.

The R8C/26 Group, including R5F21262SDFP, was designed for cost-sensitive, low-power embedded control in appliances, sensors, and automotive sub-systems - emphasizing integrated peripherals, wide supply range, and industrial-grade reliability.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F21262SDFP?

The R5F21262SDFP operates at up to 20 MHz when supplied with V_CC = 3.0–5.5 V. At lower frequencies, it supports down to 2.2 V (5 MHz mode) - enabling flexible power architecture design. The D-version qualification ensures stable operation across –40°C to +85°C under these conditions. All timing parameters in the R5F21262SDFP datasheet are validated within these electrical and thermal boundaries.

Does the R5F21262SDFP include on-chip data flash memory?

No, the R5F21262SDFP belongs to the R8C/26 Group and contains only 8 KB of program flash memory with 100 write/erase cycles. It does not include the 2 × 1 KB data flash blocks found in the R8C/27 Group (e.g., R5F21272SDFP). Data retention between power cycles requires external EEPROM or careful use of program flash sectors with wear-leveling firmware.

Which pins support the hardware LIN interface on the R5F21262SDFP?

The R5F21262SDFP implements hardware LIN using UART0 (TXD0/RXD0) combined with timer RA output (TRAO) for baud rate generation and synchronization. Pin assignments are fixed: TXD0 on P1_4, RXD0 on P1_5, and TRAO on P3_7. No external transceiver is needed for basic LIN slave node functionality, though a level-shifter may be required for ISO 9141-2 compliance.

Can the R5F21262SDFP operate with a 32 kHz crystal for real-time clock functions?

Yes - the R5F21262SDFP supports 32 kHz crystal operation via XCIN/XCOUT pins (pins 4 and 6), but only in N and D versions. This enables low-power real-time clock (RTC) functionality in timer RE, allowing wake-up from stop mode with typical current draw of 0.7 µA. The crystal must be connected directly between XCIN and XCOUT with appropriate load capacitors.

What are the key differences between the R5F21262SDFP and R5F21262SNFP?

The R5F21262SDFP and R5F21262SNFP share identical memory (8 KB flash, 512 bytes RAM), peripherals, and pinout, differing only in operating temperature range: D version (–40°C to +85°C) vs. N version (–20°C to +85°C). Both use PLQP0032GB-A LQFP-32 packaging. The D version is qualified for harsher industrial and automotive cabin environments where sub-zero startup is required.