Renesas R5F100LJDFB#50

Overview

R5F100LJDFB#50 from Renesas is a 64-pin LFQFP (10 × 10 mm, 0.5-mm pitch), industrial-grade RL78/G13 16-bit MCU with 256 KB flash, 8 KB data flash, 20 KB RAM, 32 MHz max CPU speed, and ultra-low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD mode). It targets battery-powered industrial sensors, smart meters, and motor control interfaces requiring robust timing, analog sensing, and LIN/UART communication.

For engineers reviewing the R5F100LJDFB#50 datasheet, R5F100LJDFB#50 pinout, R5F100LJDFB#50 application, or R5F100LJDFB#50 equivalent, key selection considerations include its 64-pin LFQFP-0.5mm package, integrated 10-bit 26-channel ADC, real-time clock with calendar/alarm, and support for STOP/HALT/SNOOZE low-power modes in -40°C to +105°C environments.

Technical Context

The R5F100LJDFB#50 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and configurable instruction execution time (0.03125 μs at 32 MHz to 30.5 μs at 32.768 kHz). It integrates dual-clock domains: high-speed on-chip oscillator (±1.0% accuracy, 1–32 MHz selectable) and dedicated low-speed oscillator for watchdog and RTC.

Its peripheral set includes up to 16× 16-bit timers, 3–10× I²C channels, 2–4× UART/LIN interfaces, 2–8× CSI (SPI-compatible) channels, and DMA controller with 4 channels supporting 2-clock transfers between SFR and RAM - enabling deterministic real-time response in resource-constrained embedded systems.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP (10 × 10 mm, 0.5-mm pitch), RoHS-compliant, moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LJDFB#50, R5F101LJDFB#50 removes data flash but retains identical power/performance specs - ideal for fixed-function deployments; RA2A1GBGFP#AA0 offers higher compute density and security features but requires toolchain migration and has no SNOOZE mode equivalent.

Availability

R5F100LJDFB#50 is available at Aetrix Electronics and suitable for industrial automation, smart energy metering, and motor control applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R5F100LJDFB#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 automotive, industrial, and IoT markets.

The RL78/G13 family is designed for cost-sensitive, ultra-low-power general-purpose embedded applications - balancing performance, integration, and energy efficiency in industrial and consumer equipment.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F100LJDFB#50?

The R5F100LJDFB#50 operates at up to 32 MHz using its high-speed on-chip oscillator, delivering 41 DMIPS of processing performance. Its minimum instruction execution time is 0.03125 μs under these conditions, enabling deterministic real-time response for motor control and sensor fusion algorithms within the R5F100LJDFB#50's embedded system architecture.

Does the R5F100LJDFB#50 support hardware LIN bus communication?

Yes, the R5F100LJDFB#50 supports LIN 2.2 protocol through its UART peripherals, which include dedicated LIN break detection, sync field generation, and checksum calculation. This capability is implemented in hardware without CPU overhead, making the R5F100LJDFB#50 suitable for automotive body electronics and industrial sub-networks requiring LIN compliance.

What low-power modes are available on the R5F100LJDFB#50, and what is the lowest achievable current draw?

The R5F100LJDFB#50 supports HALT, STOP, and SNOOZE modes. In STOP mode with only RTC and LVD active, it achieves 0.57 μA typical current consumption. This ultra-low quiescent current is critical for battery-backed applications like utility meters and remote sensors where the R5F100LJDFB#50 must maintain timekeeping and voltage monitoring for years without recharge.

Can the R5F100LJDFB#50 perform background data flash writes while executing application code?

Yes, the R5F100LJDFB#50 supports Background Operation (BGO) for data flash, allowing the CPU to execute instructions from program flash memory while simultaneously rewriting the 8 KB data flash. This feature enables seamless firmware updates, event logging, and parameter storage in the R5F100LJDFB#50 without halting real-time operations or requiring external non-volatile memory.

What is the ADC resolution, channel count, and reference voltage capability of the R5F100LJDFB#50?

The R5F100LJDFB#50 integrates a 10-bit successive-approximation ADC with up to 26 input channels. It supports both external reference voltages on AVREFP/AVREFM and an internal 1.45 V reference. The ADC operates across the full 1.6–5.5 V supply range, and the integrated temperature sensor provides factory-calibrated readings usable directly by the R5F100LJDFB#50's firmware without external components.