Renesas R5F100MJGFB#X0

Overview

R5F100MJGFB#X0 from Renesas is a 80-pin LFQFP, 0.5-mm pitch, industrial-grade RL78/G13 16-bit microcontroller with 256 KB flash, 8 KB data flash, 20 KB RAM, and operation up to +105°C. It integrates a 32-MHz RL78 CPU core (41 DMIPS), 16-bit timers (12 channels), 10-bit ADC (16 channels), UART/SPI/I²C interfaces, RTC, and ultra-low-power modes (0.57 μA in STOP with RTC+LVD).

For engineers reviewing the R5F100MJGFB#X0 datasheet, R5F100MJGFB#X0 pinout, R5F100MJGFB#X0 application, or R5F100MJGFB#X0 equivalent, key selection criteria include industrial temperature support (+105°C), integrated data flash for parameter storage, low-power real-time clock operation, and LFQFP-80 package compatibility with high I/O count and mixed-signal peripheral integration.

Technical Context

The R5F100MJGFB#X0 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, supporting instruction execution times from 0.03125 μs (32 MHz) to 30.5 μs (32.768 kHz). It features dual-clock domains: high-speed on-chip oscillator (±1.0% accuracy, 1–32 MHz selectable) and subsystem clock for RTC/LVD.

Its memory subsystem includes 256 KB code flash (1 KB block size, security-protected erase), 8 KB background-operable data flash (1M rewrite cycles), and 20 KB SRAM - with dedicated RAM regions reserved for flash self-programming (start address FAF00H). Power management supports HALT, STOP, and SNOOZE modes with configurable voltage detector (14-level LVD) and POR.

Key Specifications

Pinout & Package

Package: 80-pin LFQFP (12 × 12 mm, 0.5-mm pitch), RoHS-compliant, industrial-grade (G-suffix), embossed tape packaging (#X0).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F100MJGFB#X0, R5F101MJGFB#X0 removes data flash to reduce cost and silicon area but retains all timing/peripheral functionality, while R5F100MLGFB#X0 scales memory upward without changing footprint or thermal envelope - enabling seamless migration paths within the same PCB layout.

Availability

R5F100MJGFB#X0 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and portable medical devices requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R5F100MJGFB#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, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G13 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and thermally demanding industrial control and sensing applications.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F100MJGFB#X0?

The R5F100MJGFB#X0 operates at up to 32 MHz using its high-accuracy on-chip oscillator (±1.0% over −40°C to +85°C). At this frequency, it delivers 41 DMIPS of computational throughput. Its minimum instruction execution time is 0.03125 μs, and the core supports dynamic clock switching down to 32.768 kHz for ultra-low-power RTC operation - all confirmed in the R01DS0131EJ0380 datasheet Section 1.1.

Does the R5F100MJGFB#X0 include an integrated RTC, and what calendar functionality does it support?

Yes, the R5F100MJGFB#X0 includes a fully integrated real-time clock with calendar function supporting dates up to 99 years, alarm generation, and hardware clock correction. The RTC operates independently in STOP mode with only 0.57 μA current draw when powered by VDD, and it uses the 32.768 kHz subsystem clock - verified in Section 1.1 "Features" and Section 2.3 "Real-Time Clock" of the R01DS0131EJ0380 datasheet.

What is the data flash endurance and voltage range for reprogramming the R5F100MJGFB#X0?

The R5F100MJGFB#X0 provides 8 KB of data flash rated for 1,000,000 write/erase cycles (typical) with operation supported across the full VDD range of 1.8 V to 5.5 V. Background operation (BGO) allows CPU code execution from program memory during data flash rewriting - specifications confirmed in Section 1.1 "Data Flash Memory" of the R01DS0131EJ0380 datasheet.

Which package and pin count does the R5F100MJGFB#X0 use, and what does the #X0 suffix indicate?

The R5F100MJGFB#X0 uses an 80-pin LFQFP package with 0.5-mm pitch (Renesas code PLQP0080KE-A). The #X0 suffix denotes embossed tape packaging - consistent with Renesas' standard ordering nomenclature defined in Figure 1-1 and Table 1-1 of the R01DS0131EJ0380 datasheet, where #X0 applies to LFQFP/LQFP/TSSOP/LSSOP packages.

How does the R5F100MJGFB#X0 support functional safety requirements in industrial applications?

The R5F100MJGFB#X0 supports functional safety through integrated hardware features including a windowed watchdog timer (operable on dedicated low-speed oscillator), voltage detector with 14-level interrupt/reset selection, power-on-reset circuit, and flash memory security functions (block erase prohibition, flash shield window). These capabilities align with IEC 61508 SIL-2 development guidance for MCU-based controllers - detailed in Sections 1.1 and 2.10 of the R01DS0131EJ0380 datasheet.