Renesas R5F10RLCAFB#50

Overview

R5F10RLCAFB#50 from Renesas is a 64-pin LFQFP, 32 KB flash, 2 KB data flash, 1.5 KB RAM RL78/L12 16-bit microcontroller with integrated LCD controller/driver (up to 39 seg × 4 com), 10-bit ADC (10 channels), RTC, 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 R5F10RLCAFB#50 datasheet, R5F10RLCAFB#50 pinout, R5F10RLCAFB#50 application, or R5F10RLCAFB#50 equivalent, key selection criteria include its 64-pin LFQFP-0.5 mm pitch package, 32 KB code flash with self-programming, on-chip LCD drive supporting capacitor split and internal boost methods, and verified 31 DMIPS at 24 MHz for real-time control tasks.

Technical Context

The R5F10RLCAFB#50 implements the RL78 CPU core with Harvard architecture, 3-stage pipeline, and CISC instruction set enabling 86% of instructions in 1–2 clock cycles. It integrates dual power domains (VDD/EVDD) and separate ground lines (VSS/EVSS) to minimize noise in sensitive analog and LCD segments.

Its LCD controller supports three drive methods-capacitor split (0.12 µA), internal voltage boost (0.63 µA at VDD = 3.0 V), and resistance division-with programmable contrast (16 steps), blinking, and waveform A/B selection. The RTC includes full calendar, alarm, and watch correction functions.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit MCU with integrated LCD applications.

Compared with R5F10RLAAFB#50, the R5F10RLCAFB#50 provides 16 KB more flash for feature-rich firmware and 512 bytes extra RAM for larger buffers; versus R5F10RJCAFA#50, it adds dual power domains and 10 additional I/O/LCD pins for enhanced scalability and noise immunity in industrial-grade displays.

Availability

R5F10RLCAFB#50 is available at Aetrix Electronics and suitable for smart energy meters, portable medical devices, and home appliance control panels requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for R5F10RLCAFB#50 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 solutions for automotive, industrial, and IoT markets.

The RL78/L12 product line delivers true low-power 16-bit MCUs optimized for LCD-based human interface applications, combining ultra-low active and standby current with integrated display driving and functional safety features.

FAQ

What is the maximum operating frequency and associated DMIPS rating for the R5F10RLCAFB#50?

The R5F10RLCAFB#50 operates at a maximum frequency of 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS performance. This benchmark is measured under standard conditions (VDD = 2.7–5.5 V, TA = −40°C to +85°C) and reflects real-world execution speed for mixed computational and I/O workloads typical in LCD control applications.

Does the R5F10RLCAFB#50 support external crystal oscillators for both main and subsystem clocks?

Yes, the R5F10RLCAFB#50 supports external crystals on X1/X2 pins for the main system clock (up to 20 MHz) and on XT1/XT2 pins for the 32.768 kHz subsystem clock used by the RTC. The high-speed on-chip oscillator (24 MHz ±1%) can also serve as the main clock source, eliminating the need for an external crystal in non-RTC-critical applications.

How many LCD segments and commons does the R5F10RLCAFB#50 support, and what drive methods are available?

The R5F10RLCAFB#50 supports up to 39 segment outputs and 8 common outputs, configurable for 35×8 or 39×4 LCD formats. It implements three drive methods: capacitor split (0.12 µA), internal voltage boost (0.63 µA at 3.0 V), and external resistance division - all selectable via software configuration registers.

What low-power modes are available on the R5F10RLCAFB#50, and what is the current draw in Halt mode?

The R5F10RLCAFB#50 offers Stop (0.23 µA RAM retained), Halt (0.64 µA with RTC + LVD active), and Snooze modes. In Halt mode, the CPU and most peripherals halt while RTC, LVD, and RAM remain powered - enabling decade-long battery operation in timekeeping applications without external supervision.

Is the R5F10RLCAFB#50 pin-compatible with other RL78/L12 family members in the same package variant?

Yes, the R5F10RLCAFB#50 shares identical pinout and electrical characteristics with other 64-pin LFQFP variants in the RL78/L12 family (e.g., R5F10RLAAFB#50, R5F10RLAGFB#50), differing only in flash size, RAM capacity, and temperature grade. This enables hardware reuse across product tiers while scaling firmware features.