Renesas R5F104LJAFA#30

Overview

R5F104LJAFA#30 from Renesas is a 64-pin LQFP-0.65mm MCU in the RL78/G14 family, featuring 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 achieves ultra-low power consumption (66 μA/MHz active, 0.60 μA in RTC+LVD mode), targeting battery-powered industrial control and sensor nodes.

For engineers reviewing the R5F104LJAFA#30 datasheet, R5F104LJAFA#30 pinout, R5F104LJAFA#30 application, or R5F104LJAFA#30 equivalent, key selection considerations include its 64-pin LQFP-0.65mm package, integrated RTC with calendar/alarm, 10-bit 20-channel ADC, dual UART/LIN support, and hardware DTC/ELC for deterministic peripheral event handling.

Technical Context

The R5F104LJAFA#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 integrates a high-accuracy ±1.0% on-chip oscillator (selectable from 1–64 MHz) and supports HALT/STOP/SNOOZE low-power modes with fast wake-up.

Peripheral integration includes Timer Array Unit (TAU) with 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 peripherals-eliminating CPU overhead for time-critical signal routing.

Key Specifications

Pinout & Package

Package: 64-pin LQFP, 12 × 12 mm body, 0.65 mm pitch, plastic, surface-mount. RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LHAFA#30, the R5F104LJAFA#30 provides 64 KB more flash and 4 KB more RAM for enhanced feature sets, while R5F104LKAFA#30 doubles flash and adds 12 KB RAM - all share identical 64-pin LQFP-0.65mm mechanical and electrical interface.

Availability

R5F104LJAFA#30 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, and home appliance control systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for R5F104LJAFA#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 industrial, automotive, and IoT markets.

The RL78/G14 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications requiring high integration and long-term reliability.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F104LJAFA#30?

The R5F104LJAFA#30 operates up to 32 MHz, delivering 44 DMIPS of processing performance. Its RL78 CPU core supports configurable instruction timing - from 0.03125 µs per instruction at full speed to 30.5 µs at 32.768 kHz - enabling precise trade-offs between throughput and ultra-low-power RTC operation. This flexibility makes the R5F104LJAFA#30 suitable for both responsive control loops and decades-long battery deployments.

Does the R5F104LJAFA#30 support hardware-based peripheral event chaining without CPU involvement?

Yes, the R5F104LJAFA#30 integrates an Event Link Controller (ELC) that enables direct hardware linking of up to 26 peripheral event sources (e.g., ADC end-of-conversion, timer overflow, UART receive complete) to target functions like DMA trigger, timer start, or interrupt request - all without CPU execution or latency. This capability is confirmed in the RL78/G14 datasheet Section 1.1 and is fully implemented in the R5F104LJAFA#30 silicon.

What analog peripherals are integrated into the R5F104LJAFA#30, and how are they calibrated?

The R5F104LJAFA#30 integrates a 10-bit, 20-channel ADC with selectable internal 1.45 V reference voltage and on-die temperature sensor, plus two 8-bit DAC channels with 0–VDD output range. ADC offset/gain calibration is supported via dedicated registers, and the temperature sensor is factory-trimmed for ±2°C accuracy across –40°C to +85°C - verified in the RL78/G14 Electrical Characteristics table (Section 23.3).

Is the R5F104LJAFA#30 pin-compatible with other RL78/G14 variants in the same 64-pin LQFP package?

Yes, the R5F104LJAFA#30 shares identical pinout, electrical characteristics, and package dimensions (64-pin LQFP, 12×12 mm, 0.65 mm pitch) with all other RL78/G14 devices using the "AFA" suffix and same pin count - including R5F104LHAFA#30 and R5F104LKAFA#30. This allows direct PCB reuse across memory variants without layout changes.

What debug and programming interfaces does the R5F104LJAFA#30 support?

The R5F104LJAFA#30 supports standard Renesas E1/E20 on-chip debug interfaces via dedicated SWD/JTAG pins (P00/P01/TRST/RESET), enabling full read/write memory access, breakpoint setting, and real-time variable monitoring. It also supports self-programming via on-chip bootloader using UART or CSI - documented in the RL78/G14 Flash Self-Programming Library manual (R20UT2944).