Renesas R5F104LJGFB#X0

Overview

R5F104LJGFB#X0 from Renesas is a 64-pin LFQFP (10 × 10 mm, 0.5 mm pitch), industrial-grade RL78/G14 16-bit microcontroller with 192 KB flash, 20 KB RAM, and 8 KB data flash. It operates from 1.6–5.5 V, delivers 44 DMIPS at 32 MHz, and supports ultra-low-power modes (66 μA/MHz active, 0.60 μA RTC+LVD). It targets battery-powered industrial sensors and motor control interfaces requiring integrated analog peripherals and deterministic real-time response.

For engineers reviewing the R5F104LJGFB#X0 datasheet, R5F104LJGFB#X0 pinout, R5F104LJGFB#X0 application, or R5F104LJGFB#X0 equivalent, key selection criteria include its 64-pin LFQFP-0.5mm package, 192 KB/8 KB/20 KB memory configuration, dual ADC (10-bit, 20-channel), RTC with calendar/alarm, and support for LIN-capable UARTs and hardware DTC/ELC for low-CPU-load peripheral coordination.

Technical Context

The R5F104LJGFB#X0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 μs (32 MHz) to 30.5 μs (32.768 kHz). Its power management includes HALT, STOP, and SNOOZE modes, plus on-chip LVD with 14 selectable voltage thresholds and POR circuitry.

Peripheral integration includes Timer Array Unit (TAU) with up to 8 channels, 12-bit interval timer, real-time clock with 99-year calendar, watchdog timer, and Event Link Controller (ELC) enabling direct hardware linking of 19–26 event sources to peripheral functions without CPU intervention.

Key Specifications

Pinout & Package

Package: LFQFP-64 (10 × 10 mm, 0.5 mm pitch), industrial-grade (G-temp: −40°C to +105°C), lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LGAFB#X0, the R5F104LJGFB#X0 provides 100 KB more flash and 8 KB more RAM for feature-rich firmware and real-time data buffering; compared with R5F104LJGFP#X0, it offers identical functionality in a smaller 10 × 10 mm footprint with finer 0.5 mm pitch for higher-density industrial layouts.

Availability

R5F104LJGFB#X0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, energy metering interfaces, and factory automation I/O modules requiring stable component supply across extended product lifecycles.

Supply support for R5F104LJGFB#X0 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, reliability-critical industrial and consumer applications requiring rich analog integration and deterministic real-time performance.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104LJGFB#X0?

The R5F104LJGFB#X0 operates at up to 32 MHz and delivers 44 DMIPS (Dhrystone MIPS) under those conditions. This performance level is achieved using the on-chip high-speed oscillator with ±1.0% accuracy across 1.8–5.5 V and −40°C to +105°C. The RL78 CPU core's 3-stage pipeline enables consistent throughput for real-time control algorithms in the R5F104LJGFB#X0.

Does the R5F104LJGFB#X0 support hardware-based UART communication with LIN protocol compliance?

Yes, the R5F104LJGFB#X0 integrates UART peripherals explicitly supporting LIN-bus communication. Its UART modules include break detection, sync field generation, and checksum calculation features required for LIN 2.x compliance. These capabilities are implemented in hardware, reducing CPU load and ensuring timing accuracy-key for automotive body electronics and industrial sub-networks using the R5F104LJGFB#X0.

How much data flash endurance does the R5F104LJGFB#X0 provide, and what voltage range supports rewriting?

The R5F104LJGFB#X0 includes 8 KB of data flash rated for 1,000,000 write/erase cycles (typical). Rewriting is supported across the full operating voltage range of VDD = 1.8 V to 5.5 V, enabling reliable parameter storage and firmware logging even during brownout conditions. Background operation (BGO) allows code execution from program memory while data flash is being rewritten-a critical capability for uninterrupted operation in the R5F104LJGFB#X0.

What are the key low-power modes available on the R5F104LJGFB#X0, and what is the current draw in each?

The R5F104LJGFB#X0 supports HALT, STOP, and SNOOZE modes. HALT stops the CPU while preserving RAM and register contents; STOP disables all clocks except RTC/LVD; SNOOZE allows selected peripherals (e.g., ADC, UART) to operate while CPU sleeps. Active current is 66 μA/MHz; STOP mode draws 0.60 μA with only RTC and LVD active-verified at VDD = 3.0 V, TA = 25°C. These values are specified in the R5F104LJGFB#X0 datasheet Rev. 3.40.

Can the R5F104LJGFB#X0 perform simultaneous analog-to-digital conversions on multiple channels, and how many ADC inputs does it support?

Yes, the R5F104LJGFB#X0 supports up to 20 analog input channels (ANI0–ANI19) with its 10-bit successive-approximation ADC. While not truly simultaneous, it enables rapid sequential sampling with hardware-triggered start (e.g., via TAU or ELC) and configurable scan sequences. Internal 1.45 V reference and temperature sensor allow self-calibrated measurements-essential for precision sensing applications using the R5F104LJGFB#X0.