Renesas R5F104JJAFA#50

Overview

R5F104JJAFA#50 from Renesas is a 52-pin LQFP-0.65mm MCU in the RL78/G14 family, featuring 256 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 control and sensor interface applications requiring integrated analog peripherals and robust timing.

For engineers reviewing the R5F104JJAFA#50 datasheet, R5F104JJAFA#50 pinout, R5F104JJAFA#50 application, or R5F104JJAFA#50 equivalent, key selection criteria include its 52-pin LQFP package, 256 KB code flash with self-programming, 10-bit 20-channel ADC, dual 8-bit DACs, real-time clock with calendar, and support for LIN/UART/SPI/I²C interfaces in extended temperature range (−40°C to +105°C).

Technical Context

The R5F104JJAFA#50 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 Event Link Controller (ELC) for hardware-triggered peripheral chaining and Data Transfer Controller (DTC) supporting block, repeat, and chain transfers activated by interrupts.

Its analog subsystem includes an 8/10-bit ADC with internal 1.45 V reference and temperature sensor, two 8-bit DACs with real-time output, and up to two comparators with window/high-speed/low-speed modes. Clocking uses a high-accuracy ±1.0% on-chip oscillator (1–64 MHz selectable) plus external crystal support (X1/X2, XT1/XT2).

Key Specifications

Pinout & Package

Package: 52-pin LQFP, 10 × 10 mm body, 0.65 mm pitch, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104JGAFA#50 and R5F104JHAFA#50, the R5F104JJAFA#50 provides 64 KB more flash and 4 KB more RAM - enabling larger RTOS deployments, cryptographic libraries, or future firmware enhancements without hardware revision.

Availability

R5F104JJAFA#50 is available at Aetrix Electronics and suitable for smart metering, industrial motor control, building automation sensor nodes, and portable medical monitoring requiring stable component supply across long product lifecycles.

Supply support for R5F104JJAFA#50 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 performance for general-purpose embedded applications, combining energy efficiency, rich analog integration, and industrial-grade reliability in compact packages.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F104JJAFA#50?

The R5F104JJAFA#50 operates at up to 32 MHz with a high-speed on-chip oscillator, delivering 44 DMIPS. Its minimum instruction execution time is 0.03125 µs at 32 MHz, and it supports dynamic clock scaling down to 32.768 kHz for ultra-low-power RTC operation. This dual-speed capability allows the R5F104JJAFA#50 to balance computational throughput and energy efficiency across diverse workload phases.

Does the R5F104JJAFA#50 support in-system programming and secure firmware updates?

Yes, the R5F104JJAFA#50 supports full in-system programming via its on-chip debug function and self-programming capability. It implements boot swapping and flash shield window protection to prevent unauthorized access during firmware updates. The R5F104JJAFA#50 also includes block-erase prohibition and security lock features, ensuring robust firmware integrity and IP protection in deployed devices.

What analog peripherals are integrated into the R5F104JJAFA#50 and how are they configured?

The R5F104JJAFA#50 integrates a 10-bit 20-channel ADC with internal 1.45 V reference and temperature sensor, two 8-bit DACs with 0–VDD output range, and up to two comparators with window/high-speed/low-speed modes. All analog blocks share common AVREFP/AVREFM pins and support software-selectable reference sources. The R5F104JJAFA#50's ADC supports scan mode and hardware-triggered conversions via ELC, enabling synchronized sampling without CPU intervention.

How does the R5F104JJAFA#50 manage power in battery-operated applications?

The R5F104JJAFA#50 achieves industry-leading low-power operation with 66 μA/MHz active current and 0.60 μA in RTC+LVD-only mode. It offers HALT, STOP, and SNOOZE modes with configurable peripheral retention. Voltage detector (LVD) provides 14 programmable threshold levels for brown-out detection and reset. These features let the R5F104JJAFA#50 extend battery life in portable and remote applications while maintaining precise timekeeping and system safety.

What communication interfaces does the R5F104JJAFA#50 support and which are available on the 52-pin LQFP package?

The R5F104JJAFA#50 supports up to 4 UART/LIN channels, 3–8 CSI (SPI-compatible) channels, and 4–10 I²C channels. On the 52-pin LQFP package (R5F104JJAFA#50), all interfaces are fully accessible: UART0–UART3, CSI0–CSI7, and I²C0–I²C9 are mapped to dedicated pins or multiplexed I/O with peripheral I/O redirection (PIOR0/1). This enables concurrent use of multiple protocols - for example, UART for host communication, I²C for sensor readout, and CSI for display interface - within a single R5F104JJAFA#50 design.