Renesas R5F104MFAFA#X0

Overview

R5F104MFAFA#X0 from Renesas is a 80-pin LQFP-0.65 mm pitch, 32-bit RL78/G14 microcontroller with 96 KB flash, 12 KB RAM, and 1.6–5.5 V operation. It delivers 44 DMIPS at 32 MHz, features ultra-low-power HALT/STOP/SNOOZE modes (66 μA/MHz active, 0.60 μA RTC+LVD), and integrates 10-bit ADC (16 channels), UART/LIN, I²C, SPI, RTC, and on-chip debug. Used in industrial sensor nodes and battery-powered control modules.

For engineers reviewing the R5F104MFAFA#X0 datasheet, R5F104MFAFA#X0 pinout, R5F104MFAFA#X0 application, or R5F104MFAFA#X0 equivalent, key selection criteria include its 80-pin LQFP package, -40 to +85°C industrial temperature grade (D), integrated data flash (4 KB), real-time clock with calendar/alarm, and support for background data flash rewriting (BGO) without CPU stall.

Technical Context

The R5F104MFAFA#X0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 µs (32 MHz high-speed oscillator) to 30.5 µs (32.768 kHz subsystem clock). It includes a Data Transfer Controller (DTC) with chain transfer and an Event Link Controller (ELC) enabling direct peripheral-to-peripheral event routing without CPU intervention.

Its power management integrates on-chip POR, 14-level LVD with interrupt/reset options, and multiple low-power modes. The 10-bit A/D converter operates across full VDD range (1.6–5.5 V) with internal 1.45 V reference and temperature sensor, while the 8-bit D/A converter supports real-time output with 0–VDD range.

Key Specifications

Pinout & Package

Package: 80-pin LQFP, 14 × 14 mm, 0.65 mm pitch, RoHS-compliant, industrial-grade (TA = –40 to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104MFAFA#X0, R5F104MGAFB#X0 reduces board area but sacrifices I/O flexibility, while R5F104LEAFA#X0 increases memory headroom and pin count at the cost of larger footprint-both retain identical low-power behavior, peripheral sets, and toolchain compatibility.

Availability

R5F104MFAFA#X0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, and home appliance control systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for R5F104MFAFA#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 industrial, automotive, and IoT markets.

The RL78/G14 product line targets cost-sensitive, ultra-low-power general-purpose embedded applications-designed to replace legacy 8/16-bit MCUs while delivering 32-bit performance with minimal power and bill-of-materials overhead.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104MFAFA#X0?

The R5F104MFAFA#X0 achieves a maximum operating frequency of 32 MHz using its high-speed on-chip oscillator, delivering 44 DMIPS of processing performance. This metric is measured under standard conditions (VDD = 1.8–5.5 V, TA = –40 to +85°C) and reflects the RL78 core's optimized 3-stage pipeline efficiency. The R5F104MFAFA#X0 also supports lower-frequency operation down to 32.768 kHz for ultra-low-power RTC functions.

Does the R5F104MFAFA#X0 support background data flash rewriting (BGO), and what is the endurance specification?

Yes, the R5F104MFAFA#X0 supports Background Operation (BGO) for data flash rewriting, allowing the CPU to execute code from program memory while simultaneously erasing or programming the 4 KB data flash. Its data flash endurance is rated at 1,000,000 write/erase cycles (typical), with operation supported across the full VDD range of 1.8–5.5 V. This capability is essential for reliable parameter storage and over-the-air firmware updates in the R5F104MFAFA#X0.

What are the analog input capabilities of the R5F104MFAFA#X0, including resolution, channel count, and reference options?

The R5F104MFAFA#X0 integrates a 10-bit successive-approximation A/D converter with 16 analog input channels. It operates across the full supply range (1.6–5.5 V) and supports both external reference inputs and an internal 1.45 V reference voltage. Additionally, it includes an on-chip temperature sensor usable for ambient or die-temperature monitoring. These features make the R5F104MFAFA#X0 suitable for precision analog sensing in industrial and consumer applications.

How does the R5F104MFAFA#X0 implement low-power operation, and what are the key current consumption figures?

The R5F104MFAFA#X0 implements three primary low-power modes: HALT (CPU stopped, peripherals active), STOP (all clocks halted except RTC/LVD), and SNOOZE (selected peripherals active while CPU sleeps). Its active-mode current is 66 μA/MHz, and STOP-mode current drops to 0.60 μA when only RTC and LVD remain operational. These values are specified at VDD = 1.8–5.5 V and TA = –40 to +85°C, making the R5F104MFAFA#X0 ideal for battery-powered industrial devices.

Is the R5F104MFAFA#X0 pin-compatible with other RL78/G14 variants, and what package type does it use?

The R5F104MFAFA#X0 uses an 80-pin LQFP package with 0.65 mm pitch (RENESAS code PLQP0080JB-E) and is not pin-compatible with smaller-footprint RL78/G14 variants such as the 48-pin or 64-pin versions. Pin compatibility is limited to other 80-pin LQFP members of the RL78/G14 family sharing the same pin count and package variant (e.g., R5F104MGAFA#X0). The R5F104MFAFA#X0's specific pinout must be verified against the official RL78/G14 datasheet Figure 1-12.