Renesas R5F21246SNFP#X6

Overview

R5F21246SNFP#X6 from Renesas Electronics is a 16-bit single-chip CMOS microcontroller in the R8C/24 Group, featuring 32 KB flash program memory, 2 KB RAM, and operating at up to 20 MHz (50 ns min instruction time). It integrates a 10-bit 12-channel ADC, dual UARTs, I²C, LIN hardware module, four 8/16-bit timers, and real-time clock functionality - deployed in consumer appliance control systems requiring compact, low-power embedded processing.

For engineers reviewing the R5F21246SNFP#X6 datasheet, R5F21246SNFP#X6 pinout, R5F21246SNFP#X6 application, or R5F21246SNFP#X6 equivalent, key selection criteria include its 52-pin LQFP (PLQP0052JA-A) package, -20°C to +85°C N-grade temperature rating, absence of on-chip data flash (distinguishing it from R8C/25 Group), and support for LIN bus communication via dedicated hardware timer+UART coupling.

Technical Context

The R5F21246SNFP#X6 implements the R8C/Tiny Series CPU core with 89 fundamental instructions and a 1 Mbyte 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 follows a tightly coupled architecture: Timer RA and RB (8-bit × 2) serve as general-purpose or LIN timing sources; Timer RD (16-bit × 2) provides input capture/output compare; Timer RE delivers RTC and compare-match functions; and the LIN module binds Timer RA and UART0 for ISO-9141/SAE J2602-compliant serial communication without software overhead.

Key Specifications

Pinout & Package

Package: 52-pin LQFP (PLQP0052JA-A), 10 mm × 10 mm body, 0.65 mm pitch - compatible with standard surface-mount assembly and reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21246SDFP, R5F21246SNFP#X6 trades extended temperature tolerance for lower cost and qualification scope; compared with R5F21256SNFP, it omits data flash to simplify firmware update architecture and reduce write-cycle wear concerns in static-configuration applications.

Availability

R5F21246SNFP#X6 is available at Aetrix Electronics and suitable for home appliance control, office equipment HMI, and audio remote systems requiring stable component supply across multi-year production cycles.

Supply support for R5F21246SNFP#X6 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 consumer markets.

The R8C/24 Group, including R5F21246SNFP#X6, was designed for cost-sensitive, low-power embedded control in white goods and human-interface devices - emphasizing integration, code efficiency, and qualification for commercial temperature ranges.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for R5F21246SNFP#X6?

R5F21246SNFP#X6 operates at up to 20 MHz with a supply voltage of 3.0 V to 5.5 V. At 10 MHz, it supports 2.7 V to 5.5 V; at 5 MHz, the range extends down to 2.2 V. These specifications are defined in the electrical characteristics section of the R8C/24 Group datasheet (Rev.3.00, Feb 2008), ensuring reliable timing across diverse power domains.

Does R5F21246SNFP#X6 include on-chip data flash memory?

No, R5F21246SNFP#X6 belongs to the R8C/24 Group and contains only program flash memory (32 KB). It does not integrate data flash - a feature reserved for the R8C/25 Group (e.g., R5F21256SNFP). This distinction is explicitly stated in the product overview and confirmed in Table 1.3 of the datasheet.

Which package type and pin count does R5F21246SNFP#X6 use?

R5F21246SNFP#X6 uses the PLQP0052JA-A package: a 52-pin LQFP with 0.65 mm pitch and 10 mm × 10 mm body size. This is verified in Table 1.3 (Product Information for R8C/24 Group) and Figure 1.4 (Pin Assignments) of the official Renesas documentation.

How is the LIN bus implemented on R5F21246SNFP#X6?

R5F21246SNFP#X6 implements LIN 2.1 via a hardware module that couples Timer RA and UART0 - no software bit-banging required. This configuration is documented in Section 1.2 (Peripheral Functions) and enables ISO-9141/SAE J2602-compliant communication with guaranteed timing accuracy and reduced CPU load.

What are the key differences between R5F21246SNFP#X6 and R5F21246SDFP?

The sole functional difference is operating temperature grade: R5F21246SNFP#X6 is rated for -20°C to +85°C (N grade), while R5F21246SDFP extends to -40°C to +85°C (D grade). All electrical, peripheral, and memory specifications are identical - making them drop-in replacements except where ambient thermal conditions demand D-grade qualification.