Renesas R5F10RLCAFB#X0

Overview

R5F10RLCAFB#X0 from Renesas is a 64-pin LFQFP-packaged 16-bit RL78/L12 microcontroller with 32 KB flash, 2 KB data flash, 1.5 KB RAM, integrated LCD controller/driver (up to 39 seg × 8 com), and ultra-low-power operation (0.64 µA in RTC+LVD halt mode). It targets battery-powered LCD display systems such as smart meters, thermostats, and portable medical devices requiring high integration and extended runtime.

For engineers reviewing the R5F10RLCAFB#X0 datasheet, R5F10RLCAFB#X0 pinout, R5F10RLCAFB#X0 application, or R5F10RLCAFB#X0 equivalent, key selection criteria include its 32 KB code flash density, 64-pin LFQFP (10 × 10 mm, 0.5 mm pitch) package, on-chip LCD drive capability with capacitor-split and internal-boost methods, and support for -40°C to +85°C consumer-grade operation.

Technical Context

The R5F10RLCAFB#X0 implements the 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 high-speed on-chip oscillator (24 MHz ±1% over voltage/temperature), low-speed subsystem clock (32.768 kHz crystal support), and 15 kHz watchdog timer with window function.

Its peripheral set includes an 8-channel 16-bit timer array, 10-bit ADC with 10 channels and 2.1 µs conversion time, UART/I²C/CSI interfaces, 2-channel DMA, real-time clock with calendar/alarm, and safety features compliant with IEC/UL 60730 including flash CRC, RAM parity, and illegal access detection.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, consumer-grade (A-spec).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RLCAFB#X0, R5F10RLAAFB#X0 reduces flash capacity while retaining identical packaging and peripherals, whereas R5F10RJCAFA#X0 trades pin count and LCD drive capability for smaller footprint-both serve distinct cost and integration constraints without altering core architecture.

Availability

R5F10RLCAFB#X0 is available at Aetrix Electronics and suitable for smart energy meters, programmable thermostats, and portable medical monitors requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for R5F10RLCAFB#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, and power management ICs for automotive, industrial, and IoT applications.

The RL78/L12 product line is engineered for ultra-low-power LCD-based systems, integrating high-efficiency processing, on-chip display driving, and functional safety features to minimize external components in cost-sensitive consumer and industrial devices.

FAQ

What is the maximum operating frequency and performance of the R5F10RLCAFB#X0?

The R5F10RLCAFB#X0 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS of processing performance. Its 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 applications.

Does the R5F10RLCAFB#X0 support external crystal oscillators for precise timing?

Yes, the R5F10RLCAFB#X0 supports dual crystal configurations: main system clock via X1/X2 pins (1–20 MHz range) and subsystem clock via XT1/XT2 pins (32.768 kHz for RTC accuracy). This allows simultaneous high-speed operation and precise timekeeping without external timing ICs.

How does the LCD controller in the R5F10RLCAFB#X0 reduce system-level design complexity?

The R5F10RLCAFB#X0 integrates a full LCD controller/driver supporting up to 39 segments × 8 commons, three bias methods (capacitor-split, internal-boost, resistor-division), and 16-step contrast control. This eliminates external LCD driver ICs, reduces PCB layers, and simplifies firmware by providing direct register-mapped segment control.

What safety features does the R5F10RLCAFB#X0 include for certified applications?

The R5F10RLCAFB#X0 includes flash memory CRC calculation, RAM parity error checking, SFR write protection, illegal memory access detection, clock frequency monitoring, and ADC self-test-all aligned with IEC/UL 60730 Class B requirements. These features enable certified operation in household appliances and medical devices without additional safety hardware.

What is the power consumption profile of the R5F10RLCAFB#X0 in low-power modes?

In halt mode with only RTC and LVD active, the R5F10RLCAFB#X0 consumes 0.64 µA. Stop mode draws 0.23 µA (RAM retained) or 0.31 µA (with LVD enabled). Operating current is 62.5 µA/MHz, and LCD-specific current is as low as 0.12 µA using the capacitor-split method-ideal for battery longevity.