Renesas R5F104GJGFB#30

Overview

R5F104GJGFB#30 from Renesas is a 48-pin LFQFP-packaged 16-bit RL78/G14 microcontroller with 192 KB flash, 20 KB RAM, and 8 KB data flash, operating from 1.6 V to 5.5 V across -40°C to +105°C industrial temperature range. It delivers 44 DMIPS at 32 MHz, integrates RTC, 10-bit ADC (20 channels), UART/SPI/I²C interfaces, and ultra-low-power HALT/STOP/SNOOZE modes - deployed in motor control subsystems of HVAC actuators.

For engineers reviewing the R5F104GJGFB#30 datasheet, R5F104GJGFB#30 pinout, R5F104GJGFB#30 application, or R5F104GJGFB#30 equivalent, key selection criteria include its 48-pin LFQFP-0.5 mm pitch package, 192 KB code flash with self-programming support, 10-bit ADC with internal reference and temperature sensor, and dual UART/LIN capability for embedded control nodes requiring extended thermal reliability and low active current (66 μA/MHz).

Technical Context

The RL78 CPU core implements a 3-stage CISC pipeline with configurable instruction timing (0.03125 µs min @ 32 MHz to 30.5 µs @ 32.768 kHz), supporting multiply/divide/accumulate instructions and 1 MB address space. It includes on-chip debug, boot swapping, and flash shield window for secure firmware updates.

Peripheral integration includes Timer Array Unit (TAU) with up to 8 channels, Real-time Clock with calendar/alarm/correction, 12-bit interval timer, watchdog timer, and Event Link Controller (ELC) enabling hardware-triggered peripheral chaining without CPU intervention - critical for deterministic real-time response in closed-loop systems.

Key Specifications

Pinout & Package

Package: 48-pin LFQFP, 7 × 7 mm, 0.5 mm pitch (Renesas code FB), lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104GJGFB#30, R5F104GHGFB#30 reduces flash/RAM by 50% for cost-sensitive volume production, while R5F104LGFB#30 doubles flash and triples RAM to accommodate safety-certified middleware and dual-bank secure boot - all retaining identical timing, I/O, and thermal specs.

Availability

R5F104GJGFB#30 is available at Aetrix Electronics and suitable for HVAC actuator control, industrial sensor nodes, smart power outlets, and factory I/O modules requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for R5F104GJGFB#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 targets general-purpose industrial and consumer applications demanding ultra-low power, robust operation across -40°C to +105°C, and rich analog/mixed-signal integration - designed to replace legacy 8/16-bit MCUs with minimal firmware porting effort.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104GJGFB#30?

The R5F104GJGFB#30 operates at up to 32 MHz and delivers 44 DMIPS performance per the RL78/G14 datasheet Rev. 3.70. This metric reflects integer instruction throughput measured using the EEMBC CoreMark benchmark under typical conditions (VDD = 3.3 V, TA = 25°C). The R5F104GJGFB#30 achieves this with its 3-stage pipeline and optimized CISC architecture, enabling deterministic real-time execution in motor control loops.

Does the R5F104GJGFB#30 support LIN bus communication, and how is it implemented?

Yes, the R5F104GJGFB#30 supports LIN 2.2 and SAE J2602 protocols through its UART peripherals. Implementation requires software configuration of break detection, sync field generation, and checksum calculation - no dedicated LIN transceiver is integrated, but the UART's timing precision and interrupt-driven frame handling make it fully compliant when paired with an external LIN PHY such as the TJA1020. The R5F104GJGFB#30's 32 MHz clock ensures accurate bit timing across all LIN baud rates.

What are the memory resources allocated to the R5F104GJGFB#30, and how is data flash utilized?

The R5F104GJGFB#30 includes 192 KB of code flash, 20 KB of RAM, and 8 KB of data flash. The data flash supports background operation (BGO), allowing program execution from main flash while simultaneously rewriting nonvolatile parameters - critical for field-updatable calibration coefficients or device configuration. Its 1,000,000-cycle endurance (typical) and 1.8–5.5 V rewrite voltage range ensure reliability in battery-backed or wide-input industrial systems using the R5F104GJGFB#30.

How does the R5F104GJGFB#30 achieve ultra-low power consumption, and what are the key low-power modes?

The R5F104GJGFB#30 achieves ultra-low power via multiple hardware-optimized modes: HALT (66 μA/MHz), STOP (0.60 μA with RTC + LVD active), and SNOOZE (selective peripheral wake-up). These modes leverage the RL78 core's clock gating, peripheral clock control, and independent voltage regulation. The R5F104GJGFB#30 maintains full register retention and RTC operation in STOP mode, enabling sub-second wake-up latency - ideal for periodic sensor sampling in energy-constrained deployments.

What is the function of the REGC pin on the R5F104GJGFB#30, and what external component is required?

The REGC pin on the R5F104GJGFB#30 connects to the internal LDO regulator's stabilization capacitor. A 0.47 µF to 1.0 µF ceramic capacitor must be placed between REGC and VSS to ensure stable internal voltage regulation and reliable reset behavior across temperature and load transients. Omitting this capacitor or using insufficient capacitance may cause erratic resets or flash programming failures - this requirement is explicitly mandated in the R5F104GJGFB#30 datasheet Section 1.3.6.