Renesas R5F104LJAFA#V0

Overview

R5F104LJAFA#V0 from Renesas is a 64-pin LQFP-0.65 mm pitch, 512 KB flash, 20 KB RAM RL78/G14 16-bit microcontroller 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 sensor nodes and battery-powered control modules.

For engineers reviewing the R5F104LJAFA#V0 datasheet, R5F104LJAFA#V0 pinout, R5F104LJAFA#V0 application, or R5F104LJAFA#V0 equivalent, key selection criteria include its 64-pin LQFP package, 512 KB code flash with data flash shield window, integrated RTC + LVD + 10-bit ADC (20 ch), and support for LIN-capable UARTs in -40°C to +85°C industrial environments.

Technical Context

The R5F104LJAFA#V0 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 integrates a 19-channel Event Link Controller (ELC) for peripheral event chaining and a Data Transfer Controller (DTC) supporting block, repeat, and chain transfers triggered by interrupts.

It features dual-clock domain operation: high-speed on-chip oscillator (selectable 1–64 MHz, ±1.0% accuracy) and subsystem clock (32.768 kHz), enabling independent low-power RTC operation while main CPU remains halted. The device supports background operation (BGO) during data flash rewriting and includes hardware-based flash security (block erase prohibition).

Key Specifications

Pinout & Package

Package: 64-pin LQFP, 12 × 12 mm body, 0.65 mm pitch, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LGAFA#V0, the R5F104LJAFA#V0 adds 256 KB flash capacity and full calendar RTC for long-term timestamped logging; versus R5F104LJAFB#V0, it trades pin density for higher I/O count and simplified thermal management in larger industrial enclosures.

Availability

R5F104LJAFA#V0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, and programmable logic relays requiring stable component supply, extended temperature support (-40°C to +85°C), and long-term production continuity.

Supply support for R5F104LJAFA#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 control applications, balancing performance, energy efficiency, and integration of analog/mixed-signal peripherals.

FAQ

What is the maximum operating frequency and core performance of the R5F104LJAFA#V0?

The R5F104LJAFA#V0 operates at up to 32 MHz, delivering 44 DMIPS. Its RL78 CPU core supports configurable instruction timing - from 0.03125 μs (high-speed mode) to 30.5 μs (ultra-low-speed mode) - enabling dynamic trade-offs between throughput and power. The R5F104LJAFA#V0 achieves this with a 3-stage pipeline and built-in multiply/divide instructions.

Does the R5F104LJAFA#V0 support LIN bus communication, and how is it implemented?

Yes, the R5F104LJAFA#V0 supports LIN bus communication via its UART peripherals, which include LIN-specific features such as automatic sync field detection, checksum calculation (classic/enhanced), and break field generation. Up to four UART channels (e.g., UART2, UART0) can be configured for LIN 2.2A compliance, and the ELC enables hardware-triggered frame transmission without CPU involvement.

What are the flash memory configuration and security features of the R5F104LJAFA#V0?

The R5F104LJAFA#V0 integrates 512 KB of code flash memory organized in 1 KB blocks, plus 8 KB of data flash. Security features include flash shield window (user-definable protected region), block erase prohibition, and on-chip debug lock. These prevent unauthorized readout, firmware overwrite, or debugger access - critical for certified industrial firmware deployments.

How does the R5F104LJAFA#V0 achieve ultra-low power consumption in STOP mode?

The R5F104LJAFA#V0 achieves 0.60 μA STOP mode current by powering down the CPU, flash, and most peripherals while retaining operation of the real-time clock (RTC), low-voltage detector (LVD), and RAM retention. This mode uses the dedicated 32.768 kHz subsystem clock and supports wake-up via 14 interrupt sources including RTC alarm, LVD threshold crossing, or external pin events.

What analog peripherals are integrated into the R5F104LJAFA#V0, and what are their key specifications?

The R5F104LJAFA#V0 integrates a 10-bit successive-approximation ADC with up to 20 input channels, internal 1.45 V reference voltage, and integrated temperature sensor. It also includes an 8-bit DAC with up to two output channels (0–VDD range) and real-time update capability. Both peripherals operate across the full 1.6–5.5 V supply range, eliminating need for external references or buffers in many sensor interfaces.