Renesas R5F21264SNFP#V2

Overview

R5F21264SNFP#V2 from Renesas Electronics is a 16-bit R8C/26 Group single-chip microcontroller with 16 KB flash ROM, 1 KB RAM, 12-channel 10-bit A/D converter, dual UARTs, I²C interface, hardware LIN module, and real-time clock support via Timer RE - deployed in office equipment, audio systems, and consumer appliances requiring compact, low-power embedded control.

For engineers reviewing the R5F21264SNFP#V2 datasheet, R5F21264SNFP#V2 pinout, R5F21264SNFP#V2 application, or R5F21264SNFP#V2 equivalent, this page delivers verified technical context, validated pin functions, confirmed operating conditions (−20°C to +85°C, 2.2–5.5 V), and two field-validated alternative MCUs for design continuity and sourcing resilience.

Technical Context

The R5F21264SNFP#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). It integrates three independent clock generation circuits: XIN-based crystal/resonator oscillator, high-speed/low-speed on-chip oscillators (with frequency adjustment), and XCIN/XCOUT 32 kHz circuit (N/D version only).

Peripheral integration includes Timer RA/RB (8-bit × 2), Timer RC (16-bit input capture/output compare), Timer RE (real-time clock + compare match), 25 I/O pins + 3 dedicated inputs, 8 LED drive ports (N/D version), and dual UARTs supporting LIN physical layer via UART0 and Timer RA - all mapped within a unified 1 Mbyte address space.

Key Specifications

Pinout & Package

32-pin molded-plastic LQFP (PLQP0032GB-A) package with exposed pad not electrically connected; RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21264SNFP#V2, R5F21264SDFP extends temperature range without altering code or layout, while R5F21274SNFP adds data flash for robust firmware field updates - both retain full software compatibility and require no PCB revision.

Availability

R5F21264SNFP#V2 is available at Aetrix Electronics and suitable for office equipment, audio systems, and consumer appliance designs requiring stable component supply across long-lifecycle production programs.

Supply support for R5F21264SNFP#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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions for industrial and consumer markets.

The R8C/26 Group, including R5F21264SNFP#V2, was designed for cost-sensitive, low-power embedded control in appliances and peripherals - emphasizing integrated peripherals, small footprint, and broad voltage/temperature operation.

FAQ

What is the maximum operating frequency and supply voltage range for R5F21264SNFP#V2?

R5F21264SNFP#V2 operates at up to 20 MHz with a supply voltage range of 2.2 V to 5.5 V. At 20 MHz, the minimum valid VCC is 3.0 V; at 5 MHz, it supports down to 2.2 V. The N version is rated for −20°C to +85°C ambient temperature, and all electrical characteristics are specified within these bounds. R5F21264SNFP#V2 includes an on-chip voltage detection circuit and power-on reset to ensure reliable initialization across this range.

Does R5F21264SNFP#V2 include on-chip data flash memory?

No, R5F21264SNFP#V2 belongs to the R8C/26 Group and contains only program flash memory (16 KB) and RAM (1 KB), with no dedicated data flash. Data flash (1 KB × 2 blocks) is exclusive to the R8C/27 Group, such as R5F21274SNFP. R5F21264SNFP#V2 supports in-system programming of its main flash but lacks separate erase/write endurance specifications for data storage - use external EEPROM or FRAM if persistent parameter storage is required.

Which pins on R5F21264SNFP#V2 support hardware LIN communication?

R5F21264SNFP#V2 implements hardware LIN using UART0 (TXD0/RXD0 pins) synchronized with Timer RA for baud rate generation and break detection. This configuration meets LIN 2.0/2.1 physical layer requirements without external transceivers. Pins TXD0 (P1_4) and RXD0 (P1_5) are fixed for this function; no remapping is available. R5F21264SNFP#V2 does not support LIN on UART1 or alternate pin sets.

Can R5F21264SNFP#V2 operate with a 32 kHz crystal for real-time clock functionality?

Yes, but only in N and D versions - R5F21264SNFP#V2 (N version) supports 32 kHz crystal operation via XCIN/XCOUT pins (pins 4 and 6) to drive Timer RE as a real-time clock. The J and K versions omit XCIN/XCOUT functionality. When enabled, the 32 kHz oscillator powers Timer RE's calendar mode with typical accuracy of ±20 ppm over −20°C to +85°C, and R5F21264SNFP#V2 maintains RTC operation in stop mode with 0.7 µA current draw.

What are the key differences between R5F21264SNFP#V2 and R5F21264SDFP?

R5F21264SNFP#V2 and R5F21264SDFP share identical flash (16 KB), RAM (1 KB), peripherals, pinout, and electrical specs - differing only in operating temperature grade: R5F21264SNFP#V2 is rated −20°C to +85°C (N), while R5F21264SDFP is −40°C to +85°C (D). Both use the same PLQP0032GB-A package and are software- and hardware-compatible. R5F21264SNFP#V2 is optimized for commercial indoor applications; R5F21264SDFP suits industrial enclosures with wider thermal swings.