Renesas R5F10RB8AFP#70

Overview

R5F10RB8AFP#70 from Renesas is an 8 KB flash, 1 KB RAM, 32-pin LQFP RL78/L12 microcontroller with integrated LCD controller/driver (up to 35 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 applications such as smart meters, thermostats, and portable medical devices.

For engineers reviewing the R5F10RB8AFP#70 datasheet, R5F10RB8AFP#70 pinout, R5F10RB8AFP#70 application, or R5F10RB8AFP#70 equivalent, key selection criteria include its 32-pin LQFP-0.8 mm pitch package, 1.6–5.5 V supply range, on-chip LCD drive capability, and support for capacitor-split LCD biasing without external components.

Technical Context

The R5F10RB8AFP#70 implements the 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 a dedicated LCD controller supporting waveform types A/B, 16-step contrast adjustment, and blinking control.

Its power management includes POR, 14-level LVD, and multiple low-power modes: Stop (0.23 µA RAM-retained), Halt (0.64 µA with RTC + LVD), and operating current of 62.5 µA/MHz. The high-speed on-chip oscillator provides ±1% accuracy from 1.8–5.5 V and −20°C to +85°C.

Key Specifications

Pinout & Package

Package: 32-pin plastic LQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, JEDEC standard PLQP0032GB-A footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RB8AFP#70, R5F10RBAAFP#70 offers double flash capacity with zero layout change, while R5F10RF8AFP#70 trades compactness for expanded I/O and LCD drive - making the former ideal for scalable firmware, the latter for display-rich industrial interfaces.

Availability

R5F10RB8AFP#70 is available at Aetrix Electronics and suitable for smart meter displays, programmable thermostats, and portable medical devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R5F10RB8AFP#70 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 for LCD-based human-interface applications, integrating optimized LCD drivers, ultra-low-power modes, and robust peripheral sets for cost-sensitive, battery-operated instrumentation.

FAQ

What is the maximum operating frequency and core performance of the R5F10RB8AFP#70?

The R5F10RB8AFP#70 operates at up to 24 MHz using its high-speed on-chip oscillator and delivers 31 DMIPS. Its 16-bit RL78 CPU core uses a Harvard architecture with a 3-stage pipeline, enabling 86% of instructions to execute in just 1–2 clock cycles - providing deterministic real-time response for display and sensor tasks.

Does the R5F10RB8AFP#70 support external crystals, and what clock options are available?

Yes, the R5F10RB8AFP#70 supports external crystals on X1/X2 pins (main system clock) and XT1/XT2 pins (subsystem clock). It also features a factory-trimmed high-speed on-chip oscillator (24 MHz ±1%) and a low-speed on-chip oscillator (15 kHz), eliminating crystal cost unless precision timing beyond ±1% is required.

How many LCD segments and commons can the R5F10RB8AFP#70 drive, and what bias methods are supported?

The R5F10RB8AFP#70 drives up to 35 segments × 4 commons or 39 segments × 4 commons. It supports three LCD bias methods: capacitor-split (no external components), internal voltage boost (integrated charge pump), and external resistance division - giving designers flexibility for contrast, power, and bill-of-materials trade-offs.

What low-power modes does the R5F10RB8AFP#70 offer, and what functions remain active in each?

The R5F10RB8AFP#70 offers Stop mode (0.23 µA, RAM retained), Halt mode (0.64 µA, RTC + LVD active), and Snooze mode (ultra-low wake-up latency). In Halt mode, the RTC continues counting, LVD monitors supply, and wake-up occurs via interrupt - enabling precise timekeeping and event detection during extended sleep periods.

Is the R5F10RB8AFP#70 pin-compatible with other RL78/L12 variants like R5F10RBAAFP#70?

Yes, the R5F10RB8AFP#70 and R5F10RBAAFP#70 share identical 32-pin LQFP-0.8 mm pitch packages, pin assignments, and peripheral mappings. The only difference is flash size (8 KB vs. 16 KB), making R5F10RBAAFP#70 a drop-in upgrade for firmware scalability without PCB revision.