Renesas R5F21258SDFP#V2

Overview

R5F21258SDFP#V2 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/25 Group, featuring an R8C/Tiny Series CPU core, 64 KB flash program memory, 3 KB RAM, and 2 × 1 KB data flash blocks. It operates from 2.2 V to 5.5 V, supports −40°C to +85°C ambient temperature (D version), and delivers 50 ns minimum instruction execution time at 20 MHz. It targets embedded control in consumer appliances and industrial HMI systems.

For engineers reviewing the R5F21258SDFP#V2 datasheet, R5F21258SDFP#V2 pinout, R5F21258SDFP#V2 application, or R5F21258SDFP#V2 equivalent, key selection criteria include its dual data flash blocks for EEPROM emulation, LIN bus hardware support via UART0+TimerRA, 12-channel 10-bit ADC, and 52-pin LQFP (PLQP0052JA-A) package with 0.65 mm pitch.

Technical Context

The R5F21258SDFP#V2 implements the R8C/Tiny CPU core with 89 fundamental instructions and 1 Mbyte address space. Its clock system integrates three independent generation circuits: XIN-based (up to 20 MHz), high-speed on-chip oscillator (frequency-adjustable), and XCIN-based 32 kHz real-time clock source.

Peripheral integration includes Timer RD (16-bit × 2 channels with input capture/output compare), Timer RE (real-time clock with compare match), two UARTs, one I²C interface, one clock-synchronous serial I/O with chip select, and hardware LIN module routed through UART0 and Timer RA.

Key Specifications

Pinout & Package

Package: 52-pin molded-plastic LQFP (PLQP0052JA-A), 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 R5F21258SNFP, the R5F21258SDFP#V2 adds guaranteed 10,000-cycle data flash endurance and −40°C operation; compared with R5F21248SDFP, it integrates data flash to eliminate external memory, reducing system complexity and failure points.

Availability

R5F21258SDFP#V2 is available at Aetrix Electronics and suitable for home appliance control, industrial HMI panels, and smart lighting nodes requiring stable component supply across long production lifecycles.

Supply support for R5F21258SDFP#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 automotive, industrial, and IoT markets.

The R8C/25 Group, including R5F21258SDFP#V2, was designed for cost-sensitive, low-power embedded control in consumer electronics and industrial equipment where integrated data flash and LIN support reduce system-level complexity.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for R5F21258SDFP#V2?

The R5F21258SDFP#V2 achieves a minimum instruction execution time of 50 ns at 20 MHz, requiring VCC = 3.0 V to 5.5 V. At 10 MHz, it operates from 2.7 V to 5.5 V; at 5 MHz, the lower limit drops to 2.2 V. These ranges are validated per Renesas Electrical Characteristics specifications and define the safe functional envelope for R5F21258SDFP#V2.

Does R5F21258SDFP#V2 include hardware support for LIN communication?

Yes, R5F21258SDFP#V2 integrates a hardware LIN module using UART0 and Timer RA, enabling full LIN 2.0/2.1 frame generation and reception without CPU intervention. This is confirmed in the R8C/25 Group specification tables and block diagram, and distinguishes R5F21258SDFP#V2 from basic UART-only MCUs.

How many data flash blocks does R5F21258SDFP#V2 have, and what is their endurance rating?

R5F21258SDFP#V2 includes two independent 1 KB data flash blocks, each rated for 10,000 erase/write cycles. This specification is explicitly stated in Table 1.2 (R8C/25 Group Functions and Specifications) and differentiates it from the R8C/24 Group, which lacks data flash entirely.

What package type and pin count does R5F21258SDFP#V2 use?

R5F21258SDFP#V2 uses the PLQP0052JA-A package: a 52-pin LQFP with 10 mm × 10 mm body and 0.65 mm pin pitch. This is confirmed in Table 1.4 (Product Information for R8C/25 Group) and Figure 1.4 (Pin Assignments), and matches the "FP" suffix in the part number.

What is the ADC resolution and channel count supported by R5F21258SDFP#V2?

R5F21258SDFP#V2 integrates a single 10-bit successive-approximation ADC with 12 analog input channels (AN0–AN11), as documented in Tables 1.1 and 1.2 under "A/D converter" and verified in the block diagram (Figure 1.1). No oversampling or dithering modes are specified in the base documentation.