Renesas R5F104LFGFB#30

Overview

R5F104LFGFB#30 from Renesas is a 64-pin LFQFP (10 × 10 mm, 0.5 mm pitch), industrial-grade RL78/G14 16-bit MCU with 512 KB flash, 48 KB RAM, and 8 KB data flash, operating from 1.6 V to 5.5 V at -40°C to +105°C. It delivers 44 DMIPS at 32 MHz, features ultra-low power consumption (66 μA/MHz active, 0.60 μA RTC+LVD mode), and integrates 16-bit TAU timers, 10-bit ADC (20 channels), UART/LIN, I²C, CSI, RTC, and on-chip debug.

For engineers reviewing the R5F104LFGFB#30 datasheet, R5F104LFGFB#30 pinout, R5F104LFGFB#30 application, or R5F104LFGFB#30 equivalent, this page provides verified technical context, package mapping, real-world use cases, and validated alternative options for industrial control, sensor hubs, and low-power embedded systems requiring extended temperature operation and flash-based firmware flexibility.

Technical Context

The R5F104LFGFB#30 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and configurable instruction timing (0.03125 µs @ 32 MHz to 30.5 µs @ 32.768 kHz). It supports multiply/divide/accumulate instructions and a 1 MB address space with four register banks.

Its peripheral set includes 12-channel 16-bit Timer Array Unit (TAU), 1-channel 12-bit interval timer, calendar RTC with alarm/correction, 1-channel watchdog timer, 20-channel 10-bit ADC with internal 1.45 V reference and temperature sensor, and dual DTC/ELC for efficient event-driven data movement without CPU intervention.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP (10 × 10 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 R5F104LFGFB#30, R5F104LGFB#30 offers reduced memory at lower cost for less complex firmware, while R5F104LJGFB#30 maintains full memory but relaxes temperature qualification - enabling trade-offs between thermal robustness, memory headroom, and BOM cost without changing footprint or toolchain.

Availability

R5F104LFGFB#30 is available at Aetrix Electronics and suitable for industrial motor control, smart utility metering, automotive body electronics, and industrial sensor hub applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F104LFGFB#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 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and thermally demanding embedded systems - balancing performance, energy efficiency, and peripheral integration.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F104LFGFB#30?

The R5F104LFGFB#30 operates at up to 32 MHz, delivering 44 DMIPS of processing performance. This speed is achieved using the high-speed on-chip oscillator with ±1.0% accuracy across 1.8–5.5 V and -20°C to +85°C, enabling deterministic real-time control in applications like motor commutation and sensor fusion. The R5F104LFGFB#30 supports dynamic clock switching to balance speed and power.

Does the R5F104LFGFB#30 support LIN bus communication, and how is it implemented?

Yes, the R5F104LFGFB#30 supports LIN 2.2 protocol via its UART peripherals, which include dedicated LIN break detection, sync field handling, and checksum generation. No external transceiver is required for basic LIN node functionality - the R5F104LFGFB#30 drives the bus directly through configured GPIO pins with appropriate external resistors, simplifying automotive body electronics design.

What are the memory resources available on the R5F104LFGFB#30, and how are they allocated?

The R5F104LFGFB#30 integrates 512 KB of code flash, 48 KB of RAM, and 8 KB of data flash. Code flash stores executable firmware and supports block erase (1 KB), security lock, and self-programming with boot swapping. Data flash provides 1,000,000 write cycles with background operation (BGO), ideal for calibration data and event logs. RAM is used for stack, heap, and peripheral buffers - all mapped within the RL78's 1 MB address space.

How does the R5F104LFGFB#30 achieve ultra-low power consumption in STOP mode?

The R5F104LFGFB#30 achieves 0.60 μA STOP mode current by retaining only RTC operation and low-voltage detector (LVD) functionality while powering down the CPU, flash, RAM, and most peripherals. The 32.768 kHz crystal oscillator remains active for calendar timekeeping, and wake-up can occur via INTP0–INTP9 pins or RTC alarm - making the R5F104LFGFB#30 ideal for decade-long battery deployments in utility meters and remote sensors.

What package and pin count does the R5F104LFGFB#30 use, and what are key layout considerations?

The R5F104LFGFB#30 uses a 64-pin LFQFP package (10 × 10 mm, 0.5 mm pitch) with industrial temperature rating (-40°C to +105°C). Key layout considerations include placing a 0.47–1 µF capacitor between REGC and VSS for internal regulator stability, separating analog/digital ground planes, and routing X1/X2 crystal traces short and symmetric. The R5F104LFGFB#30 requires no external reset IC due to integrated POR and LVD.