Renesas R5F100LEGFA#50

Overview

R5F100LEGFA#50 from Renesas is a 64-pin LQFP-0.65mm MCU in the RL78/G13 family, featuring 128 KB flash, 8 KB data flash, 12 KB RAM, 32 MHz max CPU speed (41 DMIPS), and ultra-low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD mode). It integrates 16-bit timers, 10-bit ADC (26 channels), UART/SPI/I²C interfaces, RTC with calendar, and operates from 1.6–5.5 V across –40°C to +105°C for industrial control and sensor node applications.

For engineers reviewing the R5F100LEGFA#50 datasheet, R5F100LEGFA#50 pinout, R5F100LEGFA#50 application, or R5F100LEGFA#50 equivalent, key selection considerations include its industrial-grade temperature range (–40°C to +105°C), integrated data flash with 1M rewrite cycles, background operation during program execution, and support for low-power SNOOZE/HALT/STOP modes in resource-constrained embedded systems.

Technical Context

The R5F100LEGFA#50 implements the RL78 CPU core-a CISC architecture with 3-stage pipeline-supporting instruction execution times from 0.03125 μs (32 MHz high-speed mode) to 30.5 μs (32.768 kHz subsystem clock). It includes on-chip power-on-reset (POR), voltage detector (LVD) with 14 selectable levels, and DMA controller with up to 4 channels enabling efficient memory-to-peripheral transfers in 2 clocks per 8/16-bit transfer.

Its mixed-signal integration includes a 10-bit A/D converter with internal 1.45 V reference and temperature sensor, real-time clock with alarm/calendar functions, and multiple serial interfaces: up to 8 CSI (SPI-compatible), 4 UART/LIN channels, and 10 I²C/Simplified I²C channels-all configurable for flexible peripheral connectivity in industrial automation and metering designs.

Key Specifications

Pinout & Package

Package: 64-pin LQFP, 12 × 12 mm, 0.65-mm pitch (PLQP0064JA-A), lead-free, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LEGFA#50, the R5F100LEGFB#50 offers identical functionality in a smaller-pitch package-requiring layout adaptation but enabling higher board density-while the R5F101LEGFA#50 removes data flash entirely, reducing cost and complexity at the expense of runtime configuration persistence and secure firmware updates.

Availability

R5F100LEGFA#50 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, and building automation sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for R5F100LEGFA#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/G13 product line delivers true low-power embedded control with optimized energy efficiency, integrated analog peripherals, and robust industrial qualification-designed specifically for cost-sensitive, battery-operated, and thermally demanding applications.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F100LEGFA#50?

The R5F100LEGFA#50 operates at up to 32 MHz with a measured performance of 41 DMIPS. This benchmark reflects its RL78 CPU core's efficiency in executing instructions per cycle, validated under standard test conditions with compiler-optimized code. The high-speed on-chip oscillator supports this frequency with ±1.0% accuracy across the full industrial temperature range (–40°C to +105°C).

Does the R5F100LEGFA#50 support in-system programming and secure firmware updates?

Yes, the R5F100LEGFA#50 supports full in-system programming via its on-chip debug interface and includes flash shield window functionality to restrict access to designated memory regions during updates. It also implements boot swap capability, allowing safe dual-bank firmware upgrades without risk of bricking the device-critical for remote or safety-critical deployments of R5F100LEGFA#50.

How many analog input channels does the R5F100LEGFA#50 support, and what is the ADC resolution?

The R5F100LEGFA#50 features a 10-bit successive-approximation ADC with up to 26 analog input channels. It includes an internal 1.45 V reference voltage and integrated temperature sensor-both accessible via dedicated pins (P20/AVREFP, P21/AVREFM, and ANI20). Resolution and linearity are specified across the full 1.6–5.5 V supply range, ensuring consistent accuracy in varying power conditions.

What low-power modes are available on the R5F100LEGFA#50, and what is the lowest achievable current draw?

The R5F100LEGFA#50 offers HALT, STOP, and SNOOZE modes. In STOP mode with only RTC and LVD active, it draws just 0.57 μA (typical) at 3.3 V and 25°C. This ultra-low quiescent current enables multi-year operation on primary lithium batteries-making R5F100LEGFA#50 ideal for maintenance-free sensor endpoints and portable instrumentation.

Is the R5F100LEGFA#50 pin-compatible with other RL78/G13 variants in the same package?

Yes, all RL78/G13 devices in the 64-pin LQFP-0.65 mm package (e.g., R5F100LExxx#50 series) share identical pinouts and electrical characteristics. This allows seamless migration between memory configurations (e.g., 96 KB → 128 KB flash) or feature sets (e.g., data flash inclusion) without PCB redesign-provided the target variant maintains the same G-grade temperature rating and package code (FA).