Renesas R5F21265SDFP#V2

Overview

R5F21265SDFP#V2 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/26 Group, featuring an R8C CPU core, 24 KB on-chip flash program memory, 1.5 KB RAM, and operation at up to 20 MHz (50 ns min instruction time). 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 - used in industrial control panels and appliance motor management systems.

For engineers reviewing the R5F21265SDFP#V2 datasheet, R5F21265SDFP#V2 pinout, R5F21265SDFP#V2 application, or R5F21265SDFP#V2 equivalent, key selection criteria include its D-version temperature grade, 32-pin LQFP package, absence of on-chip data flash (distinguishing it from R8C/27), and support for XCIN/XCOUT real-time clock circuitry.

Technical Context

The R5F21265SDFP#V2 implements the R8C CPU core with 89 fundamental instructions and a 1 Mbyte address space. Its clock system includes three independent generation circuits: XIN-based crystal/resonator input, high- and low-speed on-chip oscillators (with frequency adjustment), and XCIN/XCOUT 32 kHz crystal input - the latter exclusive to N/D versions and enabling low-power real-time clock operation via Timer RE.

Peripheral integration centers on deterministic timing and mixed-signal control: Timer RC provides 16-bit input capture/output compare; UART0 and UART1 support full-duplex asynchronous communication; the hardware LIN module uses UART0 and Timer RA for ISO 9141-2/SAE J2602-compliant bus control; and the 10-bit A/D converter supports 12 analog inputs with programmable sampling timing.

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 R5F21265SNFP, the R5F21265SDFP#V2 offers extended temperature range and integrated 32 kHz RTC support; compared with R5F21275SDFP, it trades data flash endurance for lower cost and identical program ROM size - ideal for fixed-function industrial controllers where field updates are not needed.

Availability

R5F21265SDFP#V2 is available at Aetrix Electronics and suitable for industrial control panels, home appliance motor management, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F21265SDFP#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, and power solutions for industrial, automotive, and IoT applications.

The R8C/26 Group, including R5F21265SDFP#V2, was designed for cost-sensitive, reliability-critical embedded systems requiring deterministic real-time control, mixed-signal integration, and extended temperature operation without external timing or memory components.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for R5F21265SDFP#V2?

The R5F21265SDFP#V2 supports a maximum operating frequency of 20 MHz at VCC = 3.0–5.5 V. At lower frequencies - 10 MHz requires VCC = 2.7–5.5 V, and 5 MHz operates down to VCC = 2.2 V - enabling flexible power/performance scaling in battery-powered or wide-input designs. This specification is validated for the D version's -40°C to +85°C range.

Does R5F21265SDFP#V2 include on-chip data flash memory?

No, R5F21265SDFP#V2 belongs to the R8C/26 Group and contains only program flash memory (24 KB) with 100 write/erase cycles. It does not integrate data flash blocks. For on-chip data storage with higher endurance (10,000 cycles), the R8C/27 Group part R5F21275SDFP is the functional alternative.

Which pins on R5F21265SDFP#V2 support the 32 kHz real-time clock function?

The R5F21265SDFP#V2 uses pins XCIN (Pin 6) and XCOUT (Pin 4) for the 32 kHz crystal oscillator, exclusively available in D and N versions. These pins connect to a 32.768 kHz tuning-fork crystal and feed Timer RE to maintain accurate timekeeping in wait and stop modes with typical current draw of 2.0 µA and 0.7 µA respectively.

How many analog input channels does the 10-bit ADC in R5F21265SDFP#V2 support?

The R5F21265SDFP#V2 integrates a single 10-bit successive-approximation ADC supporting 12 analog input channels (AN0 through AN11), mapped across Port P0 (AN0–AN7), Port P1 (AN8–AN11), and Port P3 (AN11 shared). All channels share one sample-and-hold circuit and conversion result register.

Is R5F21265SDFP#V2 pin-compatible with other members of the R8C/26 Group?

Yes, all R8C/26 Group MCUs - including R5F21262SDFP, R5F21264SDFP, and R5F21266SDFP - use the identical PLQP0032GB-A 32-pin LQFP package and share identical pin assignments and electrical characteristics. Firmware and PCB layouts are interchangeable across ROM size variants within the same version (e.g., D version).