Renesas R5F104LKALA#U0

Overview

R5F104LKALA#U0 from Renesas is a 64-pin FLGA-packaged RL78/G14 16-bit MCU with 256 KB flash, 8 KB data flash, 24 KB RAM, and ultra-low-power operation (66 μA/MHz active, 0.60 μA RTC+LVD). It integrates UART, I²C, SPI, 16-bit timers, 10-bit ADC (20 channels), RTC, and operates from 1.6–5.5 V across –40 to +105°C for industrial motor control and sensor node applications.

For engineers reviewing the R5F104LKALA#U0 datasheet, R5F104LKALA#U0 pinout, R5F104LKALA#U0 application, or R5F104LKALA#U0 equivalent, key selection criteria include its FLGA-64 package footprint, industrial-grade temperature range (–40 to +105°C), integrated data flash with 1M rewrite cycles, and hardware event linking via ELC for deterministic peripheral coordination.

Technical Context

The R5F104LKALA#U0 implements the RL78 CPU core with 3-stage pipeline, supporting instruction execution times from 0.03125 µs (32 MHz) to 30.5 µs (32.768 kHz), and includes multiply/divide/accumulate instructions. Its memory subsystem comprises 256 KB code flash (1 KB blocks), 8 KB data flash with background operation (BGO), and 24 KB SRAM.

Peripheral integration includes Event Link Controller (ELC) for direct hardware-triggered peripheral activation, Data Transfer Controller (DTC) with chain transfer, and dual-voltage I/O supporting 1.8/2.5/3.0 V interfaces. The high-accuracy ±1.0% on-chip oscillator (64–1 MHz selectable) eliminates external crystal requirements in many designs.

Key Specifications

Pinout & Package

Package: 64-pin FLGA (5 × 5 mm, 0.5 mm pitch), wettable flank, RoHS-compliant, designed for automated optical inspection (AOI) and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LKALA#U0, R5F104LLALA#U0 provides headroom for future firmware expansion without layout change, while R5F104LKAFB#30 trades FLGA's space efficiency for easier soldering and thermal management-both retain full functional and register-level compatibility.

Availability

R5F104LKALA#U0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and factory automation I/O modules requiring stable component supply, long-term lifecycle assurance, and G-grade temperature compliance.

Supply support for R5F104LKALA#U0 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 performance for cost-sensitive industrial and consumer applications, emphasizing energy efficiency, peripheral integration, and rapid time-to-market with comprehensive toolchain support.

FAQ

What is the maximum operating frequency and corresponding power consumption of the R5F104LKALA#U0?

The R5F104LKALA#U0 operates up to 32 MHz with a typical active current of 66 μA per MHz at VDD = 3.3 V and TA = 25°C. At full speed, this yields ~2.1 mA total active current. Its ultra-low-power STOP mode draws only 0.60 μA while maintaining RTC and LVD functionality-critical for battery-backed applications.

Does the R5F104LKALA#U0 support in-system programming and secure firmware updates?

Yes, the R5F104LKALA#U0 supports full in-system programming via on-chip debug interface and boot swapping. Its flash shield window and block-erase prohibition provide hardware-enforced security. Data flash BGO allows concurrent code execution and firmware parameter updates without halting real-time operations.

What are the analog capabilities of the R5F104LKALA#U0, and how is accuracy maintained?

The R5F104LKALA#U0 features a 10-bit ADC with 20 input channels, internal 1.45 V reference voltage, and integrated temperature sensor. Accuracy is maintained through AVREFP/AVREFM differential reference inputs, programmable sample-and-hold timing, and calibration registers accessible via the flash library-enabling <±2 LSB INL across –40 to +105°C.

How does the Event Link Controller (ELC) improve real-time performance in the R5F104LKALA#U0?

The ELC in the R5F104LKALA#U0 eliminates CPU polling and ISR latency by directly routing 19–26 peripheral events (e.g., timer overflow, ADC end-of-conversion) to target functions like DTC activation or PWM reload. This enables sub-microsecond deterministic response-essential for motor commutation or synchronized sensor sampling.

What package-specific considerations apply to the R5F104LKALA#U0's FLGA-64 footprint?

The R5F104LKALA#U0 uses a 5 × 5 mm FLGA package with 0.5 mm pitch and wettable flanks. Its compact size demands precise stencil design and reflow profiling; AOI is recommended due to hidden solder joints. Thermal vias under the exposed die pad (connected to VSS) are essential for reliable operation above 60°C ambient.