Renesas R5F10RLAANB#20

Overview

R5F10RLAANB#20 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, thermostats, and portable medical devices.

For engineers reviewing the R5F10RLAANB#20 datasheet, R5F10RLAANB#20 pinout, R5F10RLAANB#20 application, or R5F10RLAANB#20 equivalent, key selection criteria include its 64-pin HWQFN package with dedicated LCD segment/com drivers, 1.6–5.5 V supply range, 24 MHz max CPU frequency delivering 31 DMIPS, and built-in safety features compliant with IEC/UL 60730.

Technical Context

The R5F10RLAANB#20 implements the 16-bit RL78 CPU core with Harvard architecture and 3-stage pipeline, enabling 86% of instructions in 1–2 clock cycles. Its on-chip voltage regulator supports single-supply operation, and the LCD controller offers three drive methods: capacitor split, internal voltage boost, and resistance division.

It integrates a high-speed on-chip oscillator (24 MHz ±1% over −20°C to +85°C), low-speed on-chip oscillator (15 kHz), and subsystem crystal oscillator input (XT1/XT2 for 32.768 kHz RTC). DMA, UART, I²C, two CSI interfaces, and eight 16-bit timer channels provide flexible peripheral control for real-time embedded functions.

Key Specifications

Pinout & Package

Package: 64-pin HWQFN (8 × 8 mm, 0.4 mm pitch), exposed die pad (EVSS/EVDD), rated for −40°C to +85°C (Consumer A-grade).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RLAANB#20, R5F10RLCANB#20 offers 4× more flash for complex firmware while maintaining full hardware compatibility, whereas R5F10RJAAFA#30 trades LCD capacity and package density for easier manufacturing - making each alternative optimal for distinct design constraints: scalability, display complexity, or production yield.

Availability

R5F10RLAANB#20 is available at Aetrix Electronics and suitable for smart energy meters, programmable thermostats, portable medical devices, and industrial panel displays requiring stable component supply across long product lifecycles.

Supply support for R5F10RLAANB#20 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 delivers true low-power performance (62.5 µA/MHz, 0.64 µA Halt) with integrated LCD control for cost-sensitive, battery-operated display applications - targeting consumer and industrial equipment where display functionality and energy efficiency are critical.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F10RLAANB#20?

The R5F10RLAANB#20 operates at a maximum frequency of 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS of processing performance. This benchmark is measured under standard conditions (VDD = 2.7–5.5 V, TA = −20°C to +85°C) and reflects the RL78 CPU core's efficient 3-stage pipeline and 86% single-cycle instruction execution rate. The R5F10RLAANB#20 maintains this performance across its full 1.6–5.5 V supply range.

Does the R5F10RLAANB#20 support RTC functionality with calendar and alarm features?

Yes, the R5F10RLAANB#20 integrates a full-featured real-time clock (RTC) module with calendar (year/month/day/hour/minute/second), alarm interrupt, and watch correction function. It uses the 32.768 kHz crystal connected to XT1/XT2 pins (P123/P124) for precision timing and supports RTC1HZ output on P31. The RTC remains operational in Halt mode consuming only 0.64 µA, making it ideal for time-stamped logging in battery-powered systems using the R5F10RLAANB#20.

What LCD drive methods does the R5F10RLAANB#20 support, and how many segments/commoms can it drive?

The R5F10RLAANB#20 supports three LCD drive methods: capacitor split, internal voltage boost, and external resistance division. It drives up to 39 segments and 8 commons (39 × 8 configuration), with dedicated pins SEG0–SEG38 and COM0–COM7. Contrast is adjustable in 16 steps, and blinking is supported per segment or group. These capabilities are implemented entirely in hardware, eliminating external LCD driver components in designs using the R5F10RLAANB#20.

Is the R5F10RLAANB#20 qualified for functional safety standards like IEC 60730?

Yes, the R5F10RLAANB#20 includes multiple hardware safety features required for Class B compliance with IEC 60730 and UL 60730, including flash memory CRC calculation, RAM parity error detection, SFR write protection, illegal memory access detection, clock frequency monitor, and ADC self-test. These are documented in the R01DS0157EJ0223 datasheet and enable developers to meet safety requirements without external supervision circuitry when using the R5F10RLAANB#20.

What is the package type and thermal specification for the R5F10RLAANB#20?

The R5F10RLAANB#20 uses a 64-pin HWQFN package (8 × 8 mm, 0.4 mm pitch) with an exposed die pad (EVSS/EVDD). It is rated for operation from −40°C to +85°C (Consumer A-grade). The package requires proper thermal vias under the exposed pad to achieve acceptable junction-to-ambient thermal resistance. The R5F10RLAANB#20 datasheet specifies solder reflow profile compliance with JEDEC J-STD-020, and the REGC pin must be decoupled with a 0.47–1 µF capacitor to VSS.