Renesas R5F21245SNFP#V2

Overview

R5F21245SNFP#V2 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller in the R8C/24 Group, designed for embedded control in cost-sensitive consumer and industrial applications. It integrates 24 KB flash program memory, 2 KB RAM, a 10-bit 12-channel ADC, dual UARTs, I²C, LIN, four 8-/16-bit timers, and operates from 2.2 V to 5.5 V at up to 20 MHz (50 ns min instruction time). It targets appliance motor control and sensor interface functions.

For engineers reviewing the R5F21245SNFP#V2 datasheet, R5F21245SNFP#V2 pinout, R5F21245SNFP#V2 application, or R5F21245SNFP#V2 equivalent, key selection criteria include its 52-pin LQFP package (PLQP0052JA-A), -20°C to +85°C temperature grade (N version), absence of on-chip data flash (distinguishing it from R8C/25 Group), and support for hardware LIN via UART0 and Timer RA.

Technical Context

The R5F21245SNFP#V2 implements the R8C/Tiny CPU core with 89 fundamental instructions and a 1 Mbyte linear address space. Its clock system includes 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 centers on mixed-signal control: Timer RD provides two 16-bit channels with input capture/output compare; Timer RE delivers real-time clock and compare match; and the 10-bit ADC supports 12 analog inputs with internal reference voltage (VREF) input. All I/O ports are CMOS with programmable direction and pull-up capability.

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 microcontroller applications.

Compared with R5F21245SNFP#V2, R5F21246SNFP provides headroom for larger firmware while maintaining full pin and peripheral compatibility, whereas R5F21255SNFP introduces data flash functionality at the cost of higher unit price and no benefit for read-only program storage use cases.

Availability

R5F21245SNFP#V2 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, office equipment interfaces, and consumer audio systems requiring stable component supply and long-term production support.

Supply support for R5F21245SNFP#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/24 Group, including R5F21245SNFP#V2, was engineered for cost-optimized 16-bit embedded control in consumer electronics and industrial equipment - emphasizing integration, low power, and ease of certification.

FAQ

What is the maximum operating frequency of the R5F21245SNFP#V2?

The R5F21245SNFP#V2 supports a maximum external crystal frequency of 20 MHz at VCC = 3.0–5.5 V, achieving a minimum instruction execution time of 50 ns. Its on-chip high-speed oscillator is adjustable but rated for lower precision than crystal-based operation. The CPU executes instructions from flash with no wait states at this speed.

Does the R5F21245SNFP#V2 include on-chip data flash memory?

No, the R5F21245SNFP#V2 belongs to the R8C/24 Group and contains only program flash memory (24 KB). It does not include dedicated data flash blocks. For data flash functionality, the R8C/25 Group part R5F21255SNFP is the direct counterpart with 2 KB data flash (1 KB × 2 blocks).

What package type and pin count does the R5F21245SNFP#V2 use?

The R5F21245SNFP#V2 uses a 52-pin LQFP package designated PLQP0052JA-A: 10 mm × 10 mm body size, 0.65 mm pin pitch, and RoHS-compliant. This is confirmed in Table 1.3 of the R8C/24 Group datasheet and Figure 1.4 showing pin assignments.

Can the R5F21245SNFP#V2 operate in low-power modes, and what are the typical currents?

Yes, the R5F21245SNFP#V2 supports wait and stop modes. Typical current consumption is 2.0 µA in wait mode (VCC = 3.0 V, f(XCIN) = 32 kHz) and 0.7 µA in stop mode (VCC = 3.0 V). These values assume proper configuration of unused peripherals and I/O states to minimize leakage.

Is hardware LIN functionality available on the R5F21245SNFP#V2?

Yes, the R5F21245SNFP#V2 includes a hardware LIN module compliant with LIN 2.0/2.1 standards. It is implemented using UART0 and Timer RA, as documented in Section 1.2 of the R8C/24 Group datasheet - no software bit-banging is required for LIN frame generation or synchronization.