Renesas Electronics America Inc R5F101LJAFA#50

Mfr. Part

R5F101LJAFA#50

Manufacturer

Renesas Electronics Corporation

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Detailed Description

16-bit RL78/G13 microcontroller, optimized for low power and high reliability

256KB on-chip flash program memory and 20KB RAM

32MHz max operating frequency for responsive real-time control

64-pin LQFP package (12x12 mm), surface-mount

48 general-purpose I/O for flexible peripheral mapping

Wide supply voltage 1.6V to 5.5V for battery and mains-powered designs

Robust operating temperature -40°C to +85°C (TA)

Integrated peripherals include DMA, LVD, POR, PWM, WDT, multiple timers

On-chip communications interfaces CSI (SPI-like), I2C, LINbus, UART/USART

On-chip ADC with up to 12 channels and up to 10-bit resolution

Internal oscillator for simple clocking without external crystal

RoHS3 compliant and supplied in Tape & Reel for automated assembly

Key Features

RL78 16-bit CPU core with efficient C program execution and deterministic interrupt handling

256KB flash for complex applications and OTA/style field updates

20KB RAM for buffers, stacks, and real-time tasks

32MHz clock for fast control loops and communications

48 GPIO on 64-pin LQFP for rich I/O and external device control

DMA for low-CPU-overhead data movement

LVD and POR for safe startup and brownout protection

PWM and multi-channel timers for motor control and power conversion

Hardware watchdog timer for system safety

CSI, I2C, LINbus, UART/USART for broad peripheral and bus connectivity

12-channel ADC up to 10-bit for sensor and analog input

Internal oscillator for reduced BOM and simplified design

Wide voltage range 1.6V to 5.5V supports 1-cell battery to 5V systems

Industrial temperature range -40°C to +85°C

Key Advantages

Ultra-low-power RL78 architecture extends battery life and reduces heat

Wide voltage support simplifies power supply design across many use cases

Rich peripheral set reduces external components and saves PCB space

Internal oscillator and robust reset/voltage monitoring improve reliability

Scalable RL78/G13 family eases migration across memory, package, and pin counts

Strong Renesas ecosystem with free tools, examples, and long-term availability

RoHS3 compliance supports global environmental standards

Tape & Reel packaging streamlines SMT production

Packaging

Type 64-LQFP, quad flat package, gull-wing leads, surface-mount

Material Molded epoxy plastic body, copper leadframe, lead-free matte tin plating, RoHS3 compliant

Size Body 12 x 12 mm; typical package height approximately 1.4 mm (refer to datasheet for exact dimensions); lead pitch commonly 0.5 mm for 64-LQFP

Pin configuration 64 pins arranged 16 per side; 48 pins usable as GPIO depending on peripheral assignment; corner index mark for pin 1 orientation

Thermal characteristics Operating temperature -40°C to +85°C (TA); thermal performance depends on PCB design, copper area, and airflow; follow Renesas layout guidelines for heat dissipation; reflow soldering per JEDEC J-STD-020

Electrical properties Supply voltage 1.6V to 5.5V; ESD handling required; observe absolute maximum ratings; MSL typically for LQFP devices (check datasheet for exact MSL level); compatibility with standard SMT processes

Shipment packaging Tape & Reel (TR) for automated pick-and-place; carrier tape per EIA standards; protective antistatic packing; factory-sealed for moisture control (follow J-STD-033 handling)

Lifecycle

Status Active and in production based on RL78/G13 platform

Not nearing discontinuation under normal market conditions

Equivalent or alternative models

- RL78/G13 family variants with different memory sizes and I/O counts, same core and peripherals, available in 64-pin LQFP and other packages

- RL78/G14 family for applications needing more advanced timers and features while keeping similar development flow

- RL78/G1x family members for lower-cost or smaller package options where fewer peripherals are needed

- Pin-for-pin and memory-scale options exist within the RL78/G13 64-pin lineup; selection depends on required flash/RAM, ADC channels, and peripherals

For exact part-number cross references and pin-compatible replacements, contact Y-IC via our website. Our sales team will match your requirements, availability, and lead time.

Key Application Areas

Industrial control, PLC modules, smart sensors, and IO expansion

Motor control and drivers with PWM and timers

Home appliances, HVAC, and white goods

Automotive body electronics and LIN bus nodes (use external LIN transceiver)

Power tools and battery-powered devices leveraging low-power modes

Metering front-ends, data loggers, and instrumentation with ADC inputs

Building automation, security panels, and access control

Consumer electronics, small displays, and UI controllers

General embedded systems requiring reliable 16-bit performance

Datasheet

Our website hosts the most authoritative and up-to-date datasheet for R5F101LJAFA#50. Download the datasheet on this page to get exact electrical limits, pinouts, timing, thermal data, and design guidelines.

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