Renesas R5F10RLAANB#U0

Overview

R5F10RLAANB#U0 from Renesas is an 8 KB flash, 1 KB RAM, 64-pin HWQFN (8 × 8 mm, 0.4 mm pitch) RL78/L12 microcontroller with integrated LCD controller/driver (up to 39 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). It targets battery-powered LCD display systems such as smart meters and portable medical devices.

For engineers reviewing the R5F10RLAANB#U0 datasheet, R5F10RLAANB#U0 pinout, R5F10RLAANB#U0 application, or R5F10RLAANB#U0 equivalent, key selection criteria include its 64-pin HWQFN package with dedicated LCD segment/com drivers, 1.6–5.5 V supply range, on-chip 24 MHz ±1% oscillator, and IEC/UL 60730 safety features for certified embedded control.

Technical Context

The R5F10RLAANB#U0 implements a 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 dual power domains (VDD/EVDD, VSS/EVSS) for noise-sensitive LCD applications and supports capacitor-split, internal-boost, and resistor-division LCD drive methods.

Its peripheral set includes one UART, two CSI (SPI-compatible) interfaces, one I²C interface, eight 16-bit timer channels, DMA controller (2 channels), and programmable key return (KR0–KR3) for keypad scanning - all operating under the same low-voltage, low-power constraints as the core.

Key Specifications

Pinout & Package

Package: HWQFN-64 (8 × 8 mm, 0.4 mm pitch) with exposed thermal pad. Requires separate VDD/EVDD and VSS/EVSS connections per Renesas layout guidelines; REGC must be decoupled to VSS with 0.47–1 µF capacitor.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RLAANB#U0, R5F10RLCANB#U0 offers 4× more flash for complex UI logic while sharing identical pinout and LCD capabilities; R5F10RLAGNB#U0 maintains the same memory and features but guarantees operation up to +105°C - critical for thermally demanding enclosures.

Availability

R5F10RLAANB#U0 is available at Aetrix Electronics and suitable for smart energy meters, portable medical displays, home appliance control panels, and industrial HMI modules requiring stable component supply across long production lifecycles.

Supply support for R5F10RLAANB#U0 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 high-resolution segment drivers, RTC, and safety features into compact packages for battery-operated consumer and industrial displays.

FAQ

What is the maximum operating frequency and core performance of the R5F10RLAANB#U0?

The R5F10RLAANB#U0 operates at up to 24 MHz using its on-chip high-speed oscillator, delivering 31 DMIPS. Its 16-bit RL78 CPU core executes 86% of instructions in just 1–2 clock cycles due to its 3-stage pipeline and CISC Harvard architecture - enabling responsive real-time control in LCD-driven systems.

Does the R5F10RLAANB#U0 support multiple LCD drive methods, and what are the segment/common limits?

Yes, the R5F10RLAANB#U0 supports capacitor split, internal voltage boost, and external resistance division LCD drive methods. It delivers up to 39 segment outputs (SEG0–SEG38) and 8 common outputs (COM0–COM7), enabling configurations such as 35 seg × 8 com or 39 seg × 4 com - verified in the RL78/L12 datasheet Rev.2.23.

What are the power consumption specifications for the R5F10RLAANB#U0 in low-power modes?

In Halt mode with RTC and LVD enabled, the R5F10RLAANB#U0 consumes 0.64 µA. Stop mode (RAM retained) draws 0.23 µA (0.31 µA with LVD enabled). Active operation is 62.5 µA/MHz, and LCD boost current is 0.63 µA at VDD = 3.0 V - all measured per R01DS0157EJ0223 Rev.2.23.

Which safety certifications does the R5F10RLAANB#U0 support for functional safety applications?

The R5F10RLAANB#U0 includes hardware-level safety features aligned with IEC/UL 60730 requirements: flash memory CRC calculation, RAM parity error checking, SFR write protection, illegal memory access detection, and clock frequency monitoring - enabling Class B compliance without external supervision circuits.

What is the package type and thermal pad configuration for the R5F10RLAANB#U0?

The R5F10RLAANB#U0 uses a 64-pin HWQFN package (8 × 8 mm, 0.4 mm pitch) with an exposed die pad. The EVSS and VSS pins must be at the same potential, and VDD and EVDD must also be tied together per Renesas layout guidance - the pad serves as both thermal and electrical ground reference.