Renesas R5F10RLAAFA#X0

Overview

R5F10RLAAFA#X0 from Renesas is a 64-pin LQFP (12 × 12 mm, 0.65 mm pitch), 16 KB flash, 2 KB data flash, 1 KB RAM RL78/L12 microcontroller with integrated LCD controller/driver supporting up to 39 seg × 4 com or 35 seg × 8 com, 10-bit ADC (10 channels), RTC with calendar/alarm, and ultra-low-power operation (0.64 µA in Halt mode with RTC + LVD) for battery-powered LCD display systems.

For engineers reviewing the R5F10RLAAFA#X0 datasheet, R5F10RLAAFA#X0 pinout, R5F10RLAAFA#X0 application, or R5F10RLAAFA#X0 equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-ready procurement details - all grounded in Renesas R01DS0157EJ0223 Rev.2.23 documentation.

Technical Context

The R5F10RLAAFA#X0 implements the 16-bit RL78 CPU core delivering 31 DMIPS at 24 MHz, with Harvard architecture, 3-stage pipeline, and 86% of instructions executed in 1–2 clock cycles. It integrates a dedicated LCD controller supporting capacitor split, internal voltage boost, and resistance division methods, plus waveform A/B selection and 16-step contrast control.

Its timing subsystem includes a high-speed on-chip oscillator (24 MHz ±1% over −20°C to +85°C), low-speed on-chip oscillator (15 kHz), and external crystal support (X1/X2, XT1/XT2). Safety features include flash CRC, RAM parity check, SFR write protection, illegal memory access detection, and ADC self-test per IEC/UL 60730 compliance.

Key Specifications

Pinout & Package

Package: 64-pin plastic LQFP (12 × 12 mm, 0.65 mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RLCAFA#X0, the R5F10RLAAFA#X0 offers identical functionality at lower flash cost and smaller code footprint; compared with R5F10RJAAFA#X0, it provides 11 additional I/O pins and expanded LCD capability for complex display interfaces - making it optimal for mid-tier consumer and industrial HMI.

Availability

R5F10RLAAFA#X0 is available at Aetrix Electronics and suitable for smart utility meters, portable medical devices, home appliance control panels, and industrial HMI modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for R5F10RLAAFA#X0 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 targets ultra-low-power LCD-based applications such as energy meters, medical handhelds, and appliance interfaces - integrating LCD drivers, RTC, and safety features into compact, cost-optimized MCUs.

FAQ

What is the maximum operating frequency and power consumption of the R5F10RLAAFA#X0?

The R5F10RLAAFA#X0 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS. In active mode, it consumes 62.5 µA per MHz; in Halt mode with RTC and LVD enabled, it draws just 0.64 µA - enabling multi-year battery life in portable LCD applications. The device supports 1.6 V to 5.5 V supply voltage.

Does the R5F10RLAAFA#X0 support external crystal oscillators?

Yes, the R5F10RLAAFA#X0 supports two external crystal configurations: main system clock via X1/X2 pins (1–20 MHz) and subsystem clock via XT1/XT2 pins (32.768 kHz). These provide precise timing for RTC accuracy and system synchronization, complementing the ±1% 24 MHz on-chip oscillator.

How many LCD segments and commons does the R5F10RLAAFA#X0 drive?

The R5F10RLAAFA#X0 drives up to 39 segments and 8 commons, configurable as either 35 seg × 8 com or 39 seg × 4 com. It supports capacitor split, internal voltage boost, and resistance division LCD bias methods - eliminating need for external LCD bias ICs in most designs.

What safety features does the R5F10RLAAFA#X0 include for IEC 60730 compliance?

The R5F10RLAAFA#X0 includes flash memory CRC calculation, RAM parity error check, RAM/SFR write protection, illegal memory access detection, clock frequency detection, and ADC self-test - all documented in Renesas' functional safety documentation (R01DS0157EJ0223) to support Class B appliance certification.

Is the R5F10RLAAFA#X0 pin-compatible with other RL78/L12 variants?

Yes, the R5F10RLAAFA#X0 shares identical pinout and electrical characteristics with other 64-pin LQFP RL78/L12 variants including R5F10RLCAFA#X0 and R5F10RLAGFA#X0. Differences are limited to flash size (16 KB vs. 32 KB) and temperature grade (A: −40°C to +85°C), allowing drop-in replacement within the same package family.