Renesas R5F104LDALA#U0

Overview

R5F104LDALA#U0 from Renesas is a 64-pin WFLGA-packaged RL78/G14 16-bit microcontroller with 32 KB flash, 4 KB data flash, and 4 KB RAM, operating from 1.6–5.5 V at -40 to +105°C (industrial G-grade). It delivers 44 DMIPS at 32 MHz, features ultra-low-power HALT/STOP/SNOOZE modes (0.60 μA RTC+LVD), and integrates UART, I²C, SPI, 10-bit ADC (16 channels), RTC, and watchdog timer for embedded control in space-constrained industrial sensors.

For engineers reviewing the R5F104LDALA#U0 datasheet, R5F104LDALA#U0 pinout, R5F104LDALA#U0 application, or R5F104LDALA#U0 equivalent, key selection criteria include its 5×5 mm WFLGA-64 package, G-grade temperature rating, integrated data flash with 1M rewrite cycles, real-time clock with calendar/alarm, and hardware event linking via ELC for deterministic peripheral coordination.

Technical Context

The R5F104LDALA#U0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, 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 32 KB code flash (1 KB blocks), 4 KB data flash with background operation (BGO), and 4 KB SRAM.

Peripheral integration centers on low-power operation: the Event Link Controller (ELC) enables direct hardware-triggered peripheral activation without CPU intervention, while the Data Transfer Controller (DTC) supports block/repeat transfers activated by 19–26 event sources. The high-accuracy ±1.0% on-chip oscillator (1–64 MHz selectable) eliminates external crystal dependency in cost-sensitive designs.

Key Specifications

Pinout & Package

64-pin WFLGA (Wafer-Level Chip-Scale Package), 5 × 5 mm body, 0.5 mm pitch, bottom-exposed thermal pad. Pin functions follow RL78/G14 standard mapping for 64-pin FLGA variants as defined in R01DS0053EJ0370 Rev. 3.70.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LDALA#U0, R5F104LGALA#U0 provides 4× more flash and double RAM for complex connectivity stacks, while R5F104LEALA#U0 offers 50% more flash and 38% more RAM at minimal cost increase - both retain identical pinout, peripherals, and G-grade temperature rating.

Availability

R5F104LDALA#U0 is available at Aetrix Electronics and suitable for industrial temperature sensing, utility metering, PLC I/O modules, and motor drive monitoring requiring stable component supply across extended product lifecycles.

Supply support for R5F104LDALA#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 family targets cost-sensitive, ultra-low-power industrial control applications where long battery life, robust operation at 105°C, and integrated analog/peripheral functionality reduce system BOM and PCB area.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F104LDALA#U0?

The R5F104LDALA#U0 operates up to 32 MHz with a peak performance of 44 DMIPS. Its RL78 CPU core achieves this using a 3-stage pipeline and supports instruction execution times ranging from 0.03125 µs (at 32 MHz with high-speed oscillator) to 30.5 µs (at 32.768 kHz for ultra-low-power RTC operation). This dual-speed capability allows dynamic trade-offs between throughput and power consumption.

Does the R5F104LDALA#U0 include a built-in data flash memory, and what are its endurance specifications?

Yes, the R5F104LDALA#U0 includes 4 KB of on-chip data flash memory rated for 1,000,000 write/erase cycles (typical) across the full 1.8–5.5 V supply range. It supports background operation (BGO), enabling concurrent program execution and data flash rewriting - essential for reliable firmware updates and secure data logging in industrial applications.

What package type and thermal characteristics does the R5F104LDALA#U0 use?

The R5F104LDALA#U0 uses a 64-pin WFLGA (Wafer-Level Chip-Scale Package) measuring 5 × 5 mm with 0.5 mm pitch and an exposed thermal pad on the bottom. This package supports industrial temperature operation from -40 to +105°C (G-grade) and requires connection of the REGC pin to VSS via a 0.47–1 µF capacitor for stable internal regulator operation.

How does the Event Link Controller (ELC) enhance real-time responsiveness in the R5F104LDALA#U0?

The ELC in the R5F104LDALA#U0 enables hardware-level linking of 19–26 peripheral events (e.g., timer overflow, ADC conversion complete, UART receive) directly to target functions (e.g., trigger DMA transfer, start ADC scan, toggle GPIO) without CPU involvement. This reduces interrupt latency to sub-microsecond levels and frees the CPU for higher-layer tasks - critical for deterministic control in PLCs and motor drives.

Can the R5F104LDALA#U0 operate without an external crystal, and what are the timing accuracy implications?

Yes, the R5F104LDALA#U0 can operate entirely from its on-chip high-speed oscillator, selectable from 1–64 MHz with ±1.0% accuracy over -20 to +85°C at 1.8–5.5 V. For RTC functionality, however, an external 32.768 kHz crystal (X1/X2) is required to maintain calendar accuracy. The internal oscillator eliminates BOM cost and board space for non-RTC applications like sensor polling or simple I/O control.