Renesas R5F104LJGFA#V0

Overview

R5F104LJGFA#V0 from Renesas is a 64-pin LFQFP, 512 KB flash, 20 KB RAM RL78/G14 16-bit MCU operating from 1.6–5.5 V, delivering 44 DMIPS at 32 MHz with ultra-low power consumption (66 μA/MHz active, 0.60 μA RTC+LVD mode), used in industrial control panels requiring extended battery life and real-time sensor interfacing.

For engineers reviewing the R5F104LJGFA#V0 datasheet, R5F104LJGFA#V0 pinout, R5F104LJGFA#V0 application, or R5F104LJGFA#V0 equivalent, this page provides verified package mapping, confirmed peripheral configuration (12-channel 16-bit TAU, 20-channel 10-bit ADC, dual UART/LIN, I²C, SPI), industrial-grade temperature support (−40 to +105°C), and direct alternative part guidance for migration and second-sourcing.

Technical Context

The R5F104LJGFA#V0 implements the RL78 CPU core with 3-stage CISC pipeline, supporting instruction execution times from 0.03125 µs (32 MHz high-speed on-chip oscillator) to 30.5 µs (32.768 kHz subsystem clock), and includes multiply/divide/accumulate instructions within a 1 MB address space.

It integrates event-driven peripherals including the Event Link Controller (ELC) for hardware-triggered peripheral chaining, Data Transfer Controller (DTC) with block/repeat/normal transfer modes, and background operation (BGO) for concurrent data flash rewriting while executing program code.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, industrial-grade thermal performance (θ_JA = 40°C/W typical).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LJGFA#V0, R5F104LGFA#V0 reduces memory capacity and analog channel count for lower unit cost, while R5F104LJGFB#V0 maintains full functionality in a mechanically distinct but functionally identical LQFP package - enabling layout reuse or procurement flexibility without firmware modification.

Availability

R5F104LJGFA#V0 is available at Aetrix Electronics and suitable for smart metering, industrial HMI, factory sensor nodes, and portable medical devices requiring stable component supply across long product lifecycles.

Supply support for R5F104LJGFA#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 industrial and consumer applications demanding extended battery life, robust real-time performance, and integrated analog/mixed-signal peripherals.

FAQ

What is the maximum operating frequency and associated DMIPS rating for the R5F104LJGFA#V0?

The R5F104LJGFA#V0 operates at a maximum frequency of 32 MHz, achieving 44 DMIPS (Dhrystone MIPS) under benchmark conditions. This performance is enabled by the RL78 CPU core's 3-stage pipeline and high-accuracy on-chip oscillator (±1.0% over −40°C to +85°C). The R5F104LJGFA#V0 sustains this speed across its full 1.6–5.5 V supply range without derating.

Does the R5F104LJGFA#V0 support background data flash rewriting while executing application code?

Yes, the R5F104LJGFA#V0 supports Background Operation (BGO) for data flash. It can rewrite its 8 KB data flash memory while simultaneously executing program code from main flash - essential for seamless firmware updates and parameter logging. The R5F104LJGFA#V0 guarantees 1,000,000 write/erase cycles at VDD = 1.8–5.5 V, with no CPU stall or interrupt latency impact during BGO.

What are the key differences between the R5F104LJGFA#V0 and R5F104LJGFB#V0?

The R5F104LJGFA#V0 and R5F104LJGFB#V0 share identical electrical specifications, memory (512 KB flash, 20 KB RAM), peripherals, and firmware compatibility. Their sole difference is packaging: R5F104LJGFA#V0 uses 64-pin LFQFP (0.5 mm pitch), while R5F104LJGFB#V0 uses 64-pin LQFP (0.65 mm pitch). The R5F104LJGFA#V0 requires tighter layout tolerances but offers better thermal dissipation.

Which analog features are integrated into the R5F104LJGFA#V0 for sensor interfacing?

The R5F104LJGFA#V0 integrates a 20-channel 10-bit ADC with selectable internal 1.45 V reference or AVDD reference, an on-chip temperature sensor, and two 8-bit DACs with rail-to-rail output (0 V to VDD). It also supports comparator functions (up to two channels) with window and low-power modes - enabling direct connection to thermistors, strain gauges, and current-sense amplifiers without external signal conditioning.

Is the R5F104LJGFA#V0 qualified for industrial temperature operation, and what is its rated range?

Yes, the R5F104LJGFA#V0 carries the 'G' grade designation, qualifying it for industrial ambient temperatures from −40°C to +105°C. This rating is validated per JEDEC JESD22-A108 and applies to all specified DC/AC electrical characteristics, ensuring reliable operation in harsh environments such as factory floors, outdoor meters, and enclosed industrial enclosures without forced cooling.