Renesas R5F21248SNFP#V2

Overview

R5F21248SNFP#V2 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller in a 52-pin LQFP package, featuring 64 KB flash program memory, 3 KB RAM, and operation across -20°C to +85°C ambient temperature. It integrates UART0/UART1, I²C bus interface, LIN hardware module, 12-channel 10-bit ADC, four 8-/16-bit timers (RA, RB, RD×2, RE), and real-time clock functionality - deployed in consumer appliance control systems requiring deterministic timing and low-power operation.

For engineers reviewing the R5F21248SNFP#V2 datasheet, R5F21248SNFP#V2 pinout, R5F21248SNFP#V2 application, or R5F21248SNFP#V2 equivalent, key selection criteria include its 52-pin PLQP0052JA-A package compatibility, N-version industrial temperature grade, absence of on-chip data flash (distinguishing it from R8C/25 Group), and verified support for LIN 2.0 physical layer via UART0+Timer RA.

Technical Context

The R5F21248SNFP#V2 implements the R8C/Tiny CPU core with 89 fundamental instructions and executes at 50 ns minimum instruction time (20 MHz XIN, 3.0–5.5 V). Its memory map spans 1 Mbyte address space, with flash memory programmed before shipment and no data flash block - confirming membership in the R8C/24 Group rather than R8C/25.

Peripheral integration includes dual UART channels supporting asynchronous and clock-synchronous serial I/O, hardware LIN transceiver logic tied to UART0 and Timer RA, and a 10-bit ADC with 12 analog inputs referenced to internal or external VREF. Clock generation uses three independent circuits: XIN-based (up to 20 MHz), high-speed on-chip oscillator (frequency-adjustable), and XCIN-based 32 kHz RTC source.

Key Specifications

Pinout & Package

Package: PLQP0052JA-A - 52-pin molded-plastic LQFP, 10 mm × 10 mm body, 0.65 mm pin pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21248SDFP, the R5F21248SNFP#V2 offers lower cost and sufficient thermal margin for indoor consumer use, while R5F21258SNFP adds data retention capability at higher unit cost and firmware adaptation effort.

Availability

R5F21248SNFP#V2 is available at Aetrix Electronics and suitable for home appliance control, office equipment motor management, and audio system remote interface applications requiring stable component supply and long-term industrial availability.

Supply support for R5F21248SNFP#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 industrial, automotive, and consumer markets.

The R8C/24 Group, including R5F21248SNFP#V2, was designed for cost-sensitive, low-power embedded control in white goods, audiovisual equipment, and human-interface devices - emphasizing integrated peripherals and robust industrial-grade operation.

FAQ

What is the maximum operating frequency of the R5F21248SNFP#V2?

The R5F21248SNFP#V2 supports a maximum XIN clock frequency of 20 MHz, achieving a minimum instruction execution time of 50 ns under 3.0–5.5 V supply conditions. Its high-speed on-chip oscillator is adjustable but does not exceed this system clock limit. The R5F21248SNFP#V2 does not support PLL multiplication; all timing derives directly from XIN, XCIN, or internal oscillators.

Does the R5F21248SNFP#V2 include on-chip data flash memory?

No, the R5F21248SNFP#V2 belongs to the R8C/24 Group and contains only program flash memory (64 KB) with no embedded data flash. Data flash functionality is exclusive to the R8C/25 Group (e.g., R5F21258SNFP). The R5F21248SNFP#V2 requires external EEPROM or FRAM for nonvolatile parameter storage.

Which package type does the R5F21248SNFP#V2 use?

The R5F21248SNFP#V2 uses the PLQP0052JA-A package: a 52-pin LQFP with 10 mm × 10 mm body size and 0.65 mm pin pitch. This is confirmed by the "FP" suffix in the part number and documented in Table 1.3 of the R8C/24 Group datasheet. It is not offered in the 64-pin FLGA (LG) variant.

What LIN protocol versions does the R5F21248SNFP#V2 support?

The R5F21248SNFP#V2 implements hardware-assisted LIN 2.0 physical layer communication using UART0 and Timer RA, as specified in the R8C/24 Group documentation. It does not support LIN 2.2A or LIN 2.2A+ features such as auto-synchronization or enhanced checksum; full protocol stack implementation remains in firmware.

How many analog input channels does the R5F21248SNFP#V2 ADC support?

The R5F21248SNFP#V2 integrates a single 10-bit successive-approximation ADC with 12 analog input channels (AN0 through AN11), mapped across P0 (AN0–AN7) and P1 (AN8–AN11) pins. All channels share one conversion unit and reference - simultaneous sampling is not supported.