Renesas R5F104LEALA#U0

Overview

R5F104LEALA#U0 from Renesas is a 64-pin WFLGA-packaged RL78/G14 16-bit microcontroller with 48 KB flash, 5.5 KB RAM, and 4 KB data flash, operating from 1.6–5.5 V at -40 to +105°C (industrial G-grade), featuring ultra-low power consumption (66 μA/MHz active, 0.60 μA RTC+LVD), 16-bit Timer Array Unit, 10-bit ADC (16 channels), and integrated UART/I²C/CSI interfaces for embedded control in HVAC, motor drives, and industrial sensors.

For engineers reviewing the R5F104LEALA#U0 datasheet, R5F104LEALA#U0 pinout, R5F104LEALA#U0 application, or R5F104LEALA#U0 equivalent, key selection criteria include its 64-pin WFLGA (5 × 5 mm, 0.5 mm pitch) package, industrial temperature rating, on-chip RTC with calendar function, background data flash rewriting capability, and support for LIN-bus via UART.

Technical Context

The R5F104LEALA#U0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 µs (32 MHz high-speed mode) to 30.5 µs (32.768 kHz ultra-low-speed mode). It integrates Event Link Controller (ELC) for hardware-triggered peripheral chaining and Data Transfer Controller (DTC) with block/chain transfer modes to offload CPU during memory-to-peripheral operations.

Its mixed-signal subsystem includes a 10-bit A/D converter with internal 1.45 V reference and temperature sensor, dual 8-bit D/A outputs (0–VDD range), and two analog comparators with selectable internal/external reference. Power management features HALT, STOP, and SNOOZE low-power modes, plus on-chip LVD with 14 interrupt/reset levels and POR circuitry.

Key Specifications

Pinout & Package

Package: 64-pin WFLGA (5 × 5 mm, 0.5 mm pitch), moisture sensitivity level MSL3, 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 R5F104LGALA#U0, the R5F104LEALA#U0 trades flash capacity for lower cost and smaller footprint, while versus R5F104LEAFB#30 it offers identical functionality in a space-constrained WFLGA package ideal for compact industrial modules.

Availability

R5F104LEALA#U0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and home appliance control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F104LEALA#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 MCUs optimized for cost-sensitive industrial and consumer applications demanding robustness, integrated peripherals, and long-term supply assurance.

FAQ

What is the maximum operating frequency and corresponding power consumption of the R5F104LEALA#U0?

The R5F104LEALA#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 32 MHz operation, total active current is approximately 2.1 mA. Its ultra-low-power STOP mode draws only 0.60 μA while maintaining RTC and LVD functionality - critical for battery-backed applications. These values are measured under specified test conditions in the official R01DS0053EJ0370 datasheet.

Does the R5F104LEALA#U0 support LIN bus communication, and how is it implemented?

Yes, the R5F104LEALA#U0 supports LIN bus communication via its UART peripheral channels (e.g., UART2 on P13/P14), which include built-in LIN break detection and sync field generation. The UART hardware handles LIN frame formatting, allowing software to manage only payload data and checksum calculation. This implementation eliminates need for external LIN transceivers in basic slave-node designs and is validated in Renesas application note R01AN1415.

What are the memory configuration details - specifically flash, RAM, and data flash - for the R5F104LEALA#U0?

The R5F104LEALA#U0 contains 48 KB of code flash memory (organized in 1 KB blocks), 5.5 KB of on-chip RAM, and 4 KB of dedicated data flash memory. The data flash supports background operation (BGO), enabling program execution from main flash while simultaneously rewriting data flash - essential for logging or parameter storage. The flash library uses RAM starting at address FE900H, as documented in R20UT2944.

How does the Event Link Controller (ELC) enhance real-time performance in the R5F104LEALA#U0?

The ELC in the R5F104LEALA#U0 enables hardware-level linking of up to 26 peripheral events (e.g., timer overflow → ADC start → DTC transfer completion) without CPU intervention or interrupt latency. This allows deterministic sub-microsecond response between chained operations - such as triggering an ADC conversion upon PWM edge, then automatically transferring result to RAM - significantly reducing ISR overhead and jitter in time-critical control loops.

What package type and pin count does the R5F104LEALA#U0 use, and what are its key mechanical characteristics?

The R5F104LEALA#U0 uses a 64-pin WFLGA (Wafer-Level Glass Array) package measuring 5 × 5 mm with 0.5 mm pitch, qualified to MSL3 moisture sensitivity level. It features an exposed die pad recommended to be connected to VSS for thermal and electrical stability. This ultra-compact, lead-free, RoHS-compliant package supports high-density PCB layouts in space-constrained industrial modules and sensor nodes.