Renesas R5F104MJGFB#30

Overview

R5F104MJGFB#30 from Renesas is a 80-pin LFQFP, 0.5 mm pitch, industrial-grade (−40°C to +105°C) RL78/G14 16-bit MCU with 192 KB flash, 8 KB data flash, 20 KB RAM, and integrated RTC, 10-bit ADC (16 channels), UART/LIN, I²C, and SPI interfaces. It targets low-power industrial control, sensor nodes, and smart appliances requiring robust timing and mixed-signal integration.

For engineers reviewing the R5F104MJGFB#30 datasheet, R5F104MJGFB#30 pinout, R5F104MJGFB#30 application, or R5F104MJGFB#30 equivalent, key selection criteria include its 192 KB code flash size, 80-pin LFQFP-0.5 mm package, −40°C to +105°C operating range, integrated LIN-capable UARTs, and real-time clock with calendar function.

Technical Context

The R5F104MJGFB#30 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and variable instruction execution time (0.03125 µs at 32 MHz to 30.5 µs at 32.768 kHz). It integrates a 192 KB code flash memory with 1 KB block erase, 8 KB data flash supporting background operation (BGO), and on-chip debug with flash shield window.

Peripheral subsystems include an Event Link Controller (ELC) for hardware-triggered peripheral chaining, Data Transfer Controller (DTC) with chain transfer, and dual 16-bit timer arrays (TAU) plus dedicated RTC, watchdog, and interval timers - enabling deterministic real-time response without CPU intervention for time-critical events.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104MLGFB#30, the R5F104MJGFB#30 trades 32 KB flash capacity for identical package and cost profile; versus R5F104MJGFP#30, it offers superior thermal dissipation and finer-pitch layout density at the expense of retooling for LFQFP-0.5 mm.

Availability

R5F104MJGFB#30 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, home appliance UIs, energy metering interfaces, and LIN-based automotive subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F104MJGFB#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 industrial, automotive, and infrastructure markets.

The RL78/G14 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and thermally constrained industrial and consumer applications requiring high integration and long-term reliability.

FAQ

What is the maximum operating frequency and corresponding current consumption of the R5F104MJGFB#30?

The R5F104MJGFB#30 operates up to 32 MHz using its high-speed on-chip oscillator (±1.0% accuracy). At this frequency, active current consumption is 66 μA per MHz - resulting in approximately 2.1 mA total at 32 MHz with typical peripherals enabled. In STOP mode with only RTC and LVD active, it draws just 0.60 μA, enabling multi-year battery life in intermittent-sensing applications.

Does the R5F104MJGFB#30 support LIN communication, and which UART channels implement it?

Yes, the R5F104MJGFB#30 supports LIN 2.2/SAE J2602 via its UART peripherals. Specifically, UART0, UART1, and UART2 all include LIN break-detection and sync-field generation logic. The LIN physical layer compliance is verified per ISO 17987-4, allowing direct connection to standard LIN transceivers without external signal conditioning.

What is the purpose of the REGC pin on the R5F104MJGFB#30, and what capacitor value is required?

The REGC pin on the R5F104MJGFB#30 is the bypass terminal for the internal voltage regulator. It must be connected to VSS via a ceramic capacitor of 0.47 µF to 1.0 µF to ensure stable core voltage regulation and low-noise operation. Failure to populate this capacitor may cause erratic reset behavior, flash programming failures, or degraded ADC accuracy under dynamic load conditions.

How many analog input channels does the R5F104MJGFB#30 support, and what reference options are available for the ADC?

The R5F104MJGFB#30 features a 10-bit successive-approximation ADC with up to 16 analog input channels (ANI0–ANI19, excluding reserved pins). Reference voltage options include external AVREFP/AVREFM differential pair, internal 1.45 V bandgap reference, or VDD. The internal reference enables ratiometric measurements independent of supply variation, critical for precision sensor interfacing.

Is the R5F104MJGFB#30 pin-compatible with other RL78/G14 variants in the same package, such as R5F104MLGFB#30?

Yes, the R5F104MJGFB#30 is fully pin-compatible with other 80-pin LFQFP-0.5 mm RL78/G14 variants including R5F104MLGFB#30 and R5F104MHGFB#30. All share identical pin count, pitch, mechanical outline (PLQP0080KB-B), and electrical pin functions. Firmware and PCB layouts are interchangeable - only flash/RAM capacities and minor peripheral enablement differ between variants.