Renesas R5F101LJDFA#V0

Overview

R5F101LJDFA#V0 from Renesas is a 64-pin LQFP-0.65mm, 128 KB flash, no data flash, industrial-grade (−40°C to +85°C) RL78/G13 16-bit MCU with 12 KB RAM, 32 MHz max CPU speed, and ultra-low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD mode). It integrates 16-bit timers, 10-bit ADC (26 channels), UART/SPI/I²C interfaces, and real-time clock - deployed in battery-powered industrial sensors and motor control edge nodes.

For engineers reviewing the R5F101LJDFA#V0 datasheet, R5F101LJDFA#V0 pinout, R5F101LJDFA#V0 application, or R5F101LJDFA#V0 equivalent, key selection criteria include its 64-pin LQFP package, absence of on-chip data flash, industrial temperature rating, and RL78/G13 core's low-power peripheral activation sequencing for energy-constrained embedded designs.

Technical Context

The R5F101LJDFA#V0 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). Its memory map spans 1 MB address space with banked 8-bit general-purpose registers.

Power management includes HALT, STOP, and SNOOZE modes; the on-chip voltage detector offers 14 selectable LVD levels with interrupt/reset options. DMA supports 4 channels with 2-clock transfers between SFR and RAM, enabling efficient peripheral-to-memory data movement without CPU intervention.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (12 × 12 mm, 0.65-mm pitch), RoHS-compliant, tray-packaged (#V0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F101LJDFA#V0, the #X0 variant offers identical functionality in tape-and-reel format for pick-and-place efficiency, while the #V0's 0.65-mm-pitch LQFP ensures broader PCB fabrication compatibility and easier rework versus the 0.5-mm-pitch #V0 LFQFP alternative.

Availability

R5F101LJDFA#V0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, programmable logic relays, and energy meter front-ends requiring stable component supply across extended product lifecycles.

Supply support for R5F101LJDFA#V0 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/G13 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated industrial and consumer devices requiring robust peripheral integration and long-term supply stability.

FAQ

What is the flash memory configuration of the R5F101LJDFA#V0?

The R5F101LJDFA#V0 contains 128 KB of on-chip code flash memory and no integrated data flash. This configuration targets applications where firmware storage is primary and nonvolatile parameter storage is handled externally - such as via SPI EEPROM or FRAM. The flash supports block erase (1 KB), self-programming, and boot swap functionality, enabling field firmware updates without external programmers.

Does the R5F101LJDFA#V0 support hardware debugging?

Yes, the R5F101LJDFA#V0 includes full on-chip debug functionality compliant with Renesas E1/E20 emulators. Pins P50 (TOOLRST) and P11 (TOOLRxD) provide dedicated debug reset and serial communication paths. Debug access remains available even in HALT and STOP modes, allowing breakpoint insertion and register inspection during ultra-low-power operation - essential for validating power management logic in the R5F101LJDFA#V0.

What are the key power-saving features enabled in the R5F101LJDFA#V0?

The R5F101LJDFA#V0 implements three low-power states: HALT (CPU stopped, peripherals active), STOP (all clocks halted except RTC/LVD), and SNOOZE (selected peripherals operate while CPU sleeps). With 66 μA/MHz active current and 0.57 μA in STOP mode with RTC + LVD active, it achieves industry-leading efficiency. The high-accuracy ±1.0% on-chip oscillator eliminates need for external crystals in many timing-critical applications, further reducing system BOM and power.

Can the R5F101LJDFA#V0 interface directly with 1.8 V logic devices?

Yes, the R5F101LJDFA#V0 supports different-potential I/O operation, allowing direct connection to 1.8 V, 2.5 V, and 3 V devices without external level shifters. Its I/O pins tolerate voltages up to 6 V (N-ch open drain) or VDD (standard), and internal pull-up resistors can be enabled per pin. This capability simplifies mixed-voltage system design - for example, interfacing the R5F101LJDFA#V0's UART with a 1.8 V BLE transceiver while maintaining 3.3 V supply for analog peripherals.

How many analog input channels does the R5F101LJDFA#V0 support?

The R5F101LJDFA#V0 integrates a 10-bit successive-approximation ADC with up to 26 analog input channels. Inputs include dedicated ANI0–ANI25 pins plus internal sources like temperature sensor and 1.45 V reference. The ADC operates across the full 1.6–5.5 V supply range and supports scan mode, hardware trigger (e.g., timer overflow), and result buffering - making it suitable for concurrent monitoring of multiple sensors in industrial automation applications using the R5F101LJDFA#V0.