Renesas R5F104MFAFB#X0

Overview

R5F104MFAFB#X0 from Renesas is a 80-pin LFQFP (12 × 12 mm, 0.5 mm pitch), industrial-grade RL78/G14 16-bit microcontroller with 256 KB flash, 24 KB RAM, and 8 KB data flash. It operates from 1.6–5.5 V, achieves 44 DMIPS at 32 MHz, and supports ultra-low-power modes (66 μA/MHz active, 0.60 μA RTC+LVD). It targets battery-powered industrial control and sensor interface applications requiring mixed-signal integration and secure firmware updates.

For engineers reviewing the R5F104MFAFB#X0 datasheet, R5F104MFAFB#X0 pinout, R5F104MFAFB#X0 application, or R5F104MFAFB#X0 equivalent, key selection criteria include its 80-pin LFQFP-0.5mm package, 256 KB/24 KB/8 KB memory configuration, integrated 10-bit ADC (20-channel), dual UART/LIN support, and industrial temperature range (−40 to +105°C).

Technical Context

The R5F104MFAFB#X0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 μs (32 MHz) to 30.5 μs (32.768 kHz). It integrates a Data Transfer Controller (DTC) for autonomous peripheral-to-memory transfers and an Event Link Controller (ELC) enabling hardware-triggered peripheral chaining without CPU intervention.

Its power management includes HALT, STOP, and SNOOZE low-power modes, on-chip POR and LVD (14-level selectable), and a dedicated low-speed oscillator for watchdog operation. The high-accuracy on-chip oscillator delivers ±1.0% stability across 1.8–5.5 V and −20 to +85°C, eliminating external crystal dependency for many timing-critical functions.

Key Specifications

Pinout & Package

Package: 80-pin LFQFP (12 × 12 mm, 0.5 mm pitch), RoHS-compliant, industrial temperature grade (G).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104MGAFB#X0 and R5F104MHAFB#X0, the R5F104MFAFB#X0 provides the largest flash/RAM allocation in the 80-pin LFQFP G-grade family, enabling complex protocol stacks (e.g., Modbus TCP + security), larger data buffers for logging, and future firmware scalability without PCB redesign.

Availability

R5F104MFAFB#X0 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, wireless sensor networks, and home appliance control requiring stable component supply across extended product lifecycles.

Supply support for R5F104MFAFB#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 enterprise markets.

The RL78/G14 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive industrial and consumer applications requiring robust mixed-signal integration, secure firmware, and long-term supply assurance.

FAQ

What is the operating temperature range for the R5F104MFAFB#X0?

The R5F104MFAFB#X0 is rated for industrial applications with an operating ambient temperature range of −40 to +105°C (G-grade). This specification is validated per Renesas' qualification standards and applies across the full 1.6–5.5 V supply range and all supported clock configurations.

Does the R5F104MFAFB#X0 include an integrated debugger interface?

Yes, the R5F104MFAFB#X0 integrates a full on-chip debug circuit compatible with Renesas E2 studio and standard SWD/JTAG tools. Pins P50 (TOOLRxD) and P51 (TOOLTxD) provide dedicated debug serial interface, enabling flash programming, breakpoint setting, and real-time variable inspection without external debug probes.

How much data flash endurance does the R5F104MFAFB#X0 support?

The R5F104MFAFB#X0 includes 8 KB of data flash memory rated for 1,000,000 write/erase cycles (typical) at VDD = 1.8–5.5 V. Background operation (BGO) allows CPU code execution from program memory during data flash rewrites, ensuring uninterrupted real-time task scheduling.

Can the R5F104MFAFB#X0 operate without an external crystal?

Yes, the R5F104MFAFB#X0 features a high-accuracy on-chip oscillator (±1.0% over −20 to +85°C, 1.8–5.5 V) supporting frequencies from 1 to 64 MHz. This eliminates the need for external crystals in most applications, though X1/X2 pins remain available for precision timing or RTC operation using a 32.768 kHz crystal.

What serial communication interfaces are available on the R5F104MFAFB#X0?

The R5F104MFAFB#X0 provides three UART/LIN channels, four to ten I²C/simplified I²C channels, and three to eight CSI (SPI-compatible) channels. All interfaces support multiplexing via peripheral I/O redirection registers (PIOR0/1), allowing flexible pin assignment without hardware changes.