Renesas R5F101LDAFA#50

Overview

R5F101LDAFA#50 from Renesas is a 64-pin LQFP-0.65mm, industrial-grade (–40°C to +85°C) RL78/G13 16-bit microcontroller with 128 KB flash, 12 KB RAM, and no data flash memory. It delivers 41 DMIPS at 32 MHz, operates from 1.6 V to 5.5 V, and features ultra-low power consumption (66 μA/MHz active, 0.57 μA RTC+LVD mode), making it suitable for battery-powered industrial sensors and smart metering endpoints.

For engineers reviewing the R5F101LDAFA#50 datasheet, R5F101LDAFA#50 pinout, R5F101LDAFA#50 application, or R5F101LDAFA#50 equivalent, key selection criteria include its 64-pin LQFP package, absence of on-chip data flash, industrial temperature rating, integrated 10-bit ADC (26 channels), real-time clock with calendar, and support for UART/LIN, I²C, and CSI serial interfaces in resource-constrained embedded control designs.

Technical Context

The R5F101LDAFA#50 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, enabling configurable instruction execution time from 0.03125 μs (32 MHz high-speed mode) to 30.5 μs (32.768 kHz ultra-low-speed mode). Its memory map includes 1 MB address space, 128 KB code flash organized in 1 KB blocks, and 12 KB on-chip RAM.

Power management integrates HALT, STOP, and SNOOZE low-power modes, an on-chip POR circuit, and a 14-level voltage detector (LVD) with interrupt/reset options. Peripheral set includes eight 16-bit timers, one 12-bit interval timer, one real-time clock with alarm/calendar, one watchdog timer, and DMA controller with four channels supporting 2-clock transfers between SFR and RAM.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LDAFA#50 and R5F101LDGFA#50, the R5F101LDAFA#50 offers optimal cost/performance balance for industrial control where data flash is unnecessary and ambient temperature stays ≤+85°C - eliminating redundant memory overhead while retaining full peripheral compatibility and debug infrastructure.

Availability

R5F101LDAFA#50 is available at Aetrix Electronics and suitable for smart energy metering, industrial sensor nodes, home appliance control, building automation panels, and factory HMI terminals requiring stable component supply across multi-year production cycles.

Supply support for R5F101LDAFA#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 industrial, automotive, and enterprise applications.

The RL78/G13 product line targets cost-sensitive, ultra-low-power general-purpose embedded systems - emphasizing energy efficiency, integrated peripherals, and seamless toolchain support for rapid development of industrial controls and consumer electronics.

FAQ

What is the maximum operating frequency and performance of the R5F101LDAFA#50?

The R5F101LDAFA#50 operates at up to 32 MHz and delivers 41 DMIPS of processing performance. This is achieved using the RL78 CPU core's 3-stage pipeline and high-speed on-chip oscillator with ±1.0% accuracy across 1.8–5.5 V and –40°C to +85°C. The R5F101LDAFA#50 sustains this performance while maintaining ultra-low active current (66 μA/MHz), making it ideal for responsive yet power-conscious applications like portable test equipment and battery-operated controllers.

Does the R5F101LDAFA#50 include on-chip data flash memory?

No, the R5F101LDAFA#50 does not include on-chip data flash memory. Per Renesas part numbering convention, the "101" prefix indicates no data flash, distinguishing it from "100"-series variants (e.g., R5F100LDAFA#50) that integrate 8 KB of data flash. This omission reduces cost and simplifies flash programming workflows where nonvolatile parameter storage or firmware update rollback is not required - a deliberate design choice for fixed-function industrial controllers.

What package type and pin count does the R5F101LDAFA#50 use?

The R5F101LDAFA#50 uses a 64-pin LQFP package with 0.65-mm pitch (12 × 12 mm body), designated by the "FA" suffix in its part number. This package is RoHS-compliant and moisture sensitivity level 3. It provides 54 usable I/O pins (including analog, serial, timer, and interrupt-capable functions), supporting complex peripheral integration without requiring external glue logic in applications such as HVAC control panels and programmable logic relays.

Which serial communication interfaces are supported by the R5F101LDAFA#50?

The R5F101LDAFA#50 supports three major serial protocols: UART/LIN (up to 4 channels), I²C/Simplified I²C (up to 10 channels), and CSI (Simplified SPI, up to 8 channels). Each interface can be mapped to multiple pin combinations via register configuration. This flexibility allows concurrent operation - for example, using UART for host communication, I²C for EEPROM/sensor access, and CSI for display or ADC interface - all within a single R5F101LDAFA#50 device in space-constrained designs.

What low-power modes are available on the R5F101LDAFA#50, and what is the lowest current draw?

The R5F101LDAFA#50 supports HALT, STOP, and SNOOZE low-power modes. In STOP mode with only the real-time clock (RTC) and low-voltage detector (LVD) active, it draws just 0.57 μA typical. This enables decade-scale battery operation in always-on monitoring applications. Wake-up sources include external interrupts, RTC alarms, and LVD events - all configurable without exiting STOP mode, preserving system state and minimizing restart latency. The R5F101LDAFA#50 achieves this while maintaining full pin state retention and RAM contents.