Renesas R5F10RG8AFB#50

Overview

R5F10RG8AFB#50 from Renesas is an 8 KB flash, 1.5 KB RAM, 48-pin LFQFP microcontroller in the RL78/L12 family, featuring integrated LCD controller/driver (up to 35 seg × 8 com), 10-bit ADC (10 channels), real-time clock with calendar, and ultra-low-power operation (62.5 µA/MHz active, 0.64 µA in RTC+LVD halt mode). It targets battery-powered LCD display systems such as smart meters and portable medical devices.

For engineers reviewing the R5F10RG8AFB#50 datasheet, R5F10RG8AFB#50 pinout, R5F10RG8AFB#50 application, or R5F10RG8AFB#50 equivalent, this page delivers verified electrical specs, confirmed LCD segment/com drive capability, validated low-power sleep modes, exact package footprint (7 mm × 7 mm, 0.5 mm pitch), and two functionally comparable alternatives for design continuity.

Technical Context

The R5F10RG8AFB#50 implements the 16-bit RL78 CPU core with Harvard architecture and 3-stage pipeline, delivering 31 DMIPS at 24 MHz using its high-speed on-chip oscillator (±1% accuracy from 1.8 V–5.5 V, −20°C to +85°C). It integrates a dedicated LCD controller supporting capacitor split, internal voltage boost, and resistance division methods with 16-step contrast control and blinking.

Its analog subsystem includes a 10-bit ADC with 2.1 µs conversion time, internal 1.45 V reference, and support down to 1.6 V supply; safety features include RAM parity check, flash CRC, SFR write protection, and illegal memory access detection compliant with IEC/UL 60730.

Key Specifications

Pinout & Package

48-pin plastic LFQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3. Pin functions follow Renesas RL78/L12 specification Rev.2.23 with peripheral I/O redirection register (PIOR) default settings.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RG8AFB#50, R5F10RGAAFB#50 offers headroom for firmware expansion within the same footprint, while R5F10RJ8AFA#50 trades compactness for increased I/O and ADC resources-making the former ideal for cost-optimized designs and the latter for feature-rich edge nodes.

Availability

R5F10RG8AFB#50 is available at Aetrix Electronics and suitable for smart energy meters, portable medical monitors, home appliance control panels, and industrial HMI modules requiring stable component supply across long product lifecycles.

Supply support for R5F10RG8AFB#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, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/L12 product line is engineered for ultra-low-power LCD-based applications, integrating display drivers, precision analog, and safety features to minimize system-level BOM and simplify certification for consumer and industrial equipment.

FAQ

What is the maximum operating frequency and power consumption of the R5F10RG8AFB#50?

The R5F10RG8AFB#50 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 only RTC and LVD enabled, it draws just 0.64 µA - enabling multi-year battery life in always-on LCD applications. The R5F10RG8AFB#50 achieves this via RL78's ultra-low-leakage process and dynamic clock gating.

Does the R5F10RG8AFB#50 support external crystals for both main and subsystem clocks?

Yes, the R5F10RG8AFB#50 supports dual crystal configurations: a main system crystal (X1/X2 pins, 1–20 MHz) for high-precision CPU timing and a 32.768 kHz crystal (XT1/XT2 pins) dedicated to the real-time clock and low-power subsystem. This separation ensures accurate timekeeping independent of CPU activity and enables reliable wake-up from deep sleep modes.

How many LCD segments and commons can the R5F10RG8AFB#50 drive, and what bias methods are supported?

The R5F10RG8AFB#50 drives up to 35 segments × 8 commons (or 39 × 4) using its integrated LCD controller. It supports three bias generation methods: capacitor split (lowest current), internal voltage boost (for higher VDD scenarios), and external resistance division (for flexibility). Contrast is adjustable in 16 steps, and blinking is hardware-supported - all configurable without CPU intervention.

What safety features does the R5F10RG8AFB#50 include for IEC/UL 60730 compliance?

The R5F10RG8AFB#50 includes flash memory CRC calculation, RAM parity error detection, RAM and SFR write protection, illegal memory access detection, clock frequency monitoring, and ADC self-test - all required for Class B compliance in household and industrial appliances. These features are implemented in hardware and require minimal software overhead to validate during startup and runtime.

Is the R5F10RG8AFB#50 pin-compatible with other RL78/L12 variants in the 48-pin LFQFP package?

Yes, all RL78/L12 48-pin LFQFP variants - including R5F10RG8AFB#50, R5F10RGAAFB#50, and R5F10RGCAFB#50 - share identical pinouts, electrical characteristics, and peripheral mappings. Firmware and PCB layouts are interchangeable across these parts; only flash size (8 KB vs. 16 KB vs. 32 KB) and data flash configuration differ - enabling scalable design reuse.