Renesas R5F10RJCAFA#10

Overview

R5F10RJCAFA#10 from Renesas is a 52-pin LQFP-packaged 16-bit RL78/L12 microcontroller with 32 KB flash, 2 KB data flash, 1.5 KB RAM, integrated LCD controller/driver (up to 35 seg × 8 com), and ultra-low-power operation (62.5 µA/MHz active, 0.64 µA in RTC+LVD halt mode). It targets battery-powered LCD display systems such as smart meters, thermostats, and portable medical devices.

For engineers reviewing the R5F10RJCAFA#10 datasheet, R5F10RJCAFA#10 pinout, R5F10RJCAFA#10 application, or R5F10RJCAFA#10 equivalent, key selection criteria include its 52-pin LQFP-0.65 mm package, 24 MHz max CPU frequency (31 DMIPS), on-chip LCD drive capability with capacitor-split and internal boost methods, and IEC/UL 60730 safety features including CRC, RAM parity, and clock detection.

Technical Context

The R5F10RJCAFA#10 implements the RL78 16-bit CISC Harvard architecture with 3-stage pipeline, delivering 31 DMIPS at 24 MHz. Its low-power design supports multiple sleep modes-Stop (0.23 µA RAM-retained), Halt (0.64 µA with RTC + LVD), and Snooze-with 1.6 V to 5.5 V single-supply operation.

It integrates a full-featured LCD controller supporting up to 35 segments × 8 commons via capacitor-split, internal voltage boost, or resistance-division methods; includes 10-channel 10-bit ADC (2.1 µs conversion), dual CSI interfaces (SPI-compatible), UART, I²C, LIN, and 8-channel timer array with RTC calendar/alarm and interval timer.

Key Specifications

Pinout & Package

Package: 52-pin LQFP (10 × 10 mm, 0.65 mm pitch), RoHS-compliant, consumer-grade (−40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RJAAFA#10, the R5F10RJCAFA#10 provides double flash capacity for feature-rich firmware and OTA updates; versus R5F10RLCAFA#10, it offers identical core functionality in a smaller 52-pin package-reducing board area and assembly cost where I/O count is sufficient.

Availability

R5F10RJCAFA#10 is available at Aetrix Electronics and suitable for smart energy meters, programmable thermostats, and portable medical monitors requiring stable component supply across industrial production lifecycles.

Supply support for R5F10RJCAFA#10 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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/L12 product line is designed specifically for ultra-low-power LCD-based applications-integrating display drivers, safety features, and extended temperature operation to replace discrete display controllers and reduce system complexity.

FAQ

What is the maximum operating frequency and performance of the R5F10RJCAFA#10?

The R5F10RJCAFA#10 operates at up to 24 MHz with its high-speed on-chip oscillator, delivering 31 DMIPS. Its RL78 CPU core executes 86% of instructions in just 1–2 clock cycles due to its 3-stage pipeline and CISC Harvard architecture. This performance level supports real-time control loops and responsive user interfaces in LCD-based devices without external acceleration.

Does the R5F10RJCAFA#10 support LCD driving with internal voltage boosting?

Yes, the R5F10RJCAFA#10 supports LCD operation using the internal voltage boost method, consuming only 0.63 µA at VDD = 3.0 V. It also supports capacitor-split and resistance-division methods, allowing flexible bias generation for various LCD types-including segment, character, and dot-matrix displays-without external charge pumps or resistors.

What safety certifications or features does the R5F10RJCAFA#10 include for industrial use?

The R5F10RJCAFA#10 includes hardware-level safety features compliant with IEC/UL 60730 Class B, including flash memory CRC calculation, RAM parity error checking, SFR write protection, illegal memory access detection, and clock frequency monitoring. These features enable certified functional safety in appliances, HVAC controls, and industrial HMIs without requiring external supervision circuitry.

How much memory does the R5F10RJCAFA#10 have, and what are its endurance characteristics?

The R5F10RJCAFA#10 contains 32 KB of code flash memory (organized in 1 KB blocks), 2 KB of data flash memory rated for 1 million erase cycles, and 1.5 KB of RAM with backup retention in all power modes. The data flash supports background operation, enabling concurrent program execution and nonvolatile data logging-critical for black-box recording in energy meters and medical devices.

What is the operating voltage range and low-power capability of the R5F10RJCAFA#10?

The R5F10RJCAFA#10 operates from 1.6 V to 5.5 V on a single supply, supporting wide battery chemistries including alkaline, lithium, and rechargeables. Its ultra-low-power design achieves 62.5 µA/MHz active current, 0.23 µA Stop mode (RAM retained), and 0.64 µA Halt mode with RTC and LVD active-enabling multi-year operation on coin cells in portable applications.