Renesas R5F104MGAFA#V0

Overview

R5F104MGAFA#V0 from Renesas is a 80-pin LQFP-0.65mm-pitch, industrial-grade (TA = −40 to +85°C) RL78/G14 16-bit MCU with 256 KB flash, 8 KB data flash, 24 KB RAM, 48 MHz max CPU speed, and integrated peripherals including 10-bit ADC (20 ch), UART/LIN (4 ch), I²C (10 ch), SPI (8 ch), RTC, and ultra-low-power HALT/STOP/SNOOZE modes - deployed in smart metering and industrial HMI control systems.

For engineers reviewing the R5F104MGAFA#V0 datasheet, R5F104MGAFA#V0 pinout, R5F104MGAFA#V0 application, or R5F104MGAFA#V0 equivalent, key selection criteria include its 24 KB on-chip RAM allocation for real-time firmware execution, 20-channel 10-bit ADC with internal temperature sensor and 1.45 V reference, and dual UART/LIN support enabling concurrent host communication and fieldbus diagnostics.

Technical Context

The R5F104MGAFA#V0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 µs (32 MHz high-speed mode) to 30.5 µs (32.768 kHz ultra-low-speed mode). It integrates a programmable Event Link Controller (ELC) that routes 26 event sources directly to peripheral functions without CPU intervention.

Its power management includes a dedicated low-speed on-chip oscillator for watchdog timer operation, on-chip voltage detector (LVD) with 14 selectable reset/interrupt thresholds, and background operation (BGO) for data flash rewriting while executing code from program memory - enabling seamless firmware updates in field-deployed devices.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LGAFA#V0, the R5F104MGAFA#V0 provides 64 KB additional flash and 4 KB more RAM for complex protocol stacks or larger UI assets; versus R5F104MJAFA#V0, it trades extended temperature rating for lower unit cost in standard industrial deployments.

Availability

R5F104MGAFA#V0 is available at Aetrix Electronics and suitable for smart metering, industrial HMI panels, and building automation controllers requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for R5F104MGAFA#V0 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 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and thermally constrained industrial control applications - balancing performance, integration, and energy efficiency.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F104MGAFA#V0?

The R5F104MGAFA#V0 operates at up to 48 MHz, delivering 44 DMIPS performance. This speed is achieved using the high-speed on-chip oscillator with ±1.0% accuracy across 1.8–5.5 V and −40 to +85°C. The RL78 core's 3-stage pipeline enables deterministic instruction timing critical for real-time control tasks executed by the R5F104MGAFA#V0.

Does the R5F104MGAFA#V0 support LIN bus communication, and how is it implemented?

Yes, the R5F104MGAFA#V0 supports LIN 2.2A bus communication through two dedicated UART modules configured for LIN physical layer modulation. Each UART can operate in LIN master or slave mode with automatic sync-break detection and checksum generation - enabling direct integration into automotive body electronics or industrial sub-networks without external transceivers. This capability is natively supported in the R5F104MGAFA#V0's hardware peripherals.

What are the power consumption characteristics of the R5F104MGAFA#V0 in low-power modes?

The R5F104MGAFA#V0 achieves 0.60 μA in STOP mode with only RTC and LVD active, and 66 μA/MHz in active mode at 32 MHz. These values are measured at VDD = 1.8–5.5 V and TA = −40 to +85°C. The ultra-low STOP current enables multi-year battery operation in metering and sensor applications - a key differentiator confirmed in the R5F104MGAFA#V0 datasheet Rev. 3.70.

How many analog input channels does the R5F104MGAFA#V0 ADC support, and what reference options are available?

The R5F104MGAFA#V0 integrates a 10-bit successive-approximation ADC with up to 20 analog input channels (ANI0–ANI19). It supports both external reference voltage and internal 1.45 V reference, plus an integrated temperature sensor. This eliminates need for external reference ICs in thermal monitoring or precision sensing applications - a verified feature of the R5F104MGAFA#V0 per its functional specification.

Is the R5F104MGAFA#V0 pin-compatible with other RL78/G14 variants in the same package?

Yes, the R5F104MGAFA#V0 is pin-compatible with all 80-pin LQFP RL78/G14 variants sharing the FA suffix (e.g., R5F104LGAFA#V0, R5F104MJAFA#V0), as confirmed by identical pin configuration diagrams and shared RENESAS Code Part Number PLQP0080JB-E. This allows direct substitution within the same PCB footprint when memory or temperature grade requirements change - a documented mechanical and electrical compatibility of the R5F104MGAFA#V0 family.