Renesas R5F104MLGFB#30

Overview

R5F104MLGFB#30 from Renesas is an RL78/G14 8-bit microcontroller featuring 384 KB flash, 32 KB RAM, and 80-pin LFQFP (0.5 mm pitch) packaging. It delivers 44 DMIPS at 32 MHz, operates from 1.6–5.5 V, achieves 66 μA/MHz active current and 0.60 μA RTC+LVD standby, and targets industrial control systems requiring extended temperature support (−40°C to +105°C).

For engineers reviewing the R5F104MLGFB#30 datasheet, R5F104MLGFB#30 pinout, R5F104MLGFB#30 application, or R5F104MLGFB#30 equivalent, key selection criteria include its G-grade industrial temp rating, integrated RTC with calendar/alarm, dual D/A converters, 20-channel 10-bit ADC with internal reference, and hardware event linking via ELC for deterministic peripheral coordination.

Technical Context

The R5F104MLGFB#30 implements the RL78 CPU core with a 3-stage pipeline, supporting instruction execution times from 0.03125 µs (32 MHz high-speed mode) to 30.5 µs (32.768 kHz ultra-low-power mode), plus multiply/divide/accumulate instructions and 1 MB address space. Its power architecture includes HALT, STOP, and SNOOZE modes, with on-chip LVD (14-level selectable) and POR.

Peripheral integration includes 12-channel 16-bit Timer Array Unit (TAU), 1-channel 12-bit interval timer, 1-channel real-time clock with calendar and clock correction, 1-channel watchdog timer, 4–10 channel I²C/Simplified I²C, 3–4 channel UART/LIN, and 3–8 channel CSI (SPI-compatible serial interface), all coordinated via the Event Link Controller (ELC) for zero-cycle latency triggering.

Key Specifications

Pinout & Package

Package: 80-pin LFQFP, 12 × 12 mm body, 0.5 mm pitch, exposed thermal pad (recommended to connect to VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104MLGFB#30, R5F104PLGFB#30 offers headroom for future firmware expansion and additional peripherals, while R5F104LLGFB#30 reduces cost and flash overhead for fixed-function implementations - both retain identical G-grade temp rating, ELC, and low-power architecture.

Availability

R5F104MLGFB#30 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, building automation sensor nodes, and portable medical monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F104MLGFB#30 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/G14 family is engineered for ultra-low-power general-purpose embedded control, emphasizing energy efficiency, integrated analog peripherals, and robust industrial qualification - specifically targeting cost-sensitive yet reliability-critical applications.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F104MLGFB#30?

The R5F104MLGFB#30 operates up to 32 MHz using its high-speed on-chip oscillator, delivering 44 DMIPS of processing performance. Its RL78 CPU core supports variable instruction timing - from 0.03125 µs per instruction at 32 MHz down to 30.5 µs at 32.768 kHz - enabling dynamic trade-offs between speed and ultra-low-power operation. This makes the R5F104MLGFB#30 suitable for both responsive control loops and battery-constrained sensing tasks.

Does the R5F104MLGFB#30 support simultaneous operation of its data flash and program execution?

Yes, the R5F104MLGFB#30 supports Background Operation (BGO) for its 8 KB data flash memory. This allows the CPU to execute instructions from code flash while concurrently rewriting data flash - essential for reliable over-the-air updates, parameter logging, or calibration storage without system interruption. The data flash endurance is rated at 1,000,000 write/erase cycles under specified VDD conditions.

How does the Event Link Controller (ELC) enhance real-time responsiveness in the R5F104MLGFB#30?

The ELC in the R5F104MLGFB#30 enables direct hardware-level linking of 19–26 peripheral events (e.g., ADC conversion complete, timer overflow, UART receive) to target functions (e.g., trigger DAC update, start next ADC channel, increment counter) without CPU involvement or interrupt latency. This provides deterministic, zero-cycle response - critical for time-critical control such as motor commutation or synchronized sensor sampling - and reduces CPU load during high-throughput peripheral operations.

What are the analog capabilities of the R5F104MLGFB#30 relevant to sensor interfacing?

The R5F104MLGFB#30 integrates a 20-channel 10-bit ADC with selectable internal 1.45 V reference and on-die temperature sensor, plus two independent 8-bit DACs with rail-to-rail 0–VDD output. These features support direct interfacing with resistive sensors, thermistors, current shunts, and analog transducers - eliminating need for external references or DACs. The ADC supports scan mode and hardware averaging, while DACs support real-time output for biasing or feedback control loops.

Is the R5F104MLGFB#30 qualified for industrial temperature operation, and what does that entail?

Yes, the R5F104MLGFB#30 carries the 'G' suffix, certifying it for industrial ambient operation from −40°C to +105°C. This qualification includes extended testing across voltage, frequency, and temperature corners, guaranteed parametric performance (e.g., ADC accuracy, oscillator stability, flash retention), and validated reliability under thermal cycling and long-term bias stress. It is intended for deployment in harsh environments such as factory floors, outdoor utility equipment, and automotive under-hood auxiliary systems.