Renesas R5F100LEAFB#V0

Overview

R5F100LEAFB#V0 from Renesas is a 64-pin, LFQFP-0.5 mm pitch, 128 KB flash, 8 KB data flash, 12 KB RAM RL78/G13 16-bit MCU with ultra-low power consumption (66 μA/MHz active, 0.57 μA RTC+LVD mode), 1.6–5.5 V operation, and integrated 10-bit ADC (26 channels), RTC, and multiple serial interfaces - deployed in battery-powered industrial sensors and smart metering endpoints.

For engineers reviewing the R5F100LEAFB#V0 datasheet, R5F100LEAFB#V0 pinout, R5F100LEAFB#V0 application, or R5F100LEAFB#V0 equivalent, key selection criteria include its 64-pin LFQFP package, 128 KB code flash with self-programming and flash shield window, 10-bit ADC with internal temperature sensor, real-time clock with calendar/alarm, and support for LIN-compliant UART in industrial ambient (−40°C to +85°C).

Technical Context

The R5F100LEAFB#V0 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and configurable instruction execution time (0.03125 μs @ 32 MHz to 30.5 μs @ 32.768 kHz). It integrates a high-accuracy ±1.0% on-chip oscillator (selectable 1–32 MHz), DMA controller (4 channels), and multiply-accumulate unit supporting 16×16→32-bit operations.

Its peripheral set includes up to 16 × 16-bit timers, 1 × 12-bit interval timer, 1 × real-time clock with calendar and clock correction, 1 × watchdog timer, and serial interfaces: CSI (up to 8 ch), UART/LIN (up to 4 ch), and I²C (up to 10 ch), all operating across the full 1.6–5.5 V supply range.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP (10 × 10 mm, 0.50-mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LEAFB#V0, R5F100LGAFB#V0 trades flash/RAM capacity for lower cost in resource-constrained control, while R5F101LEAFB#V0 removes data flash entirely - reducing security and logging capability but simplifying qualification for basic deterministic control loops.

Availability

R5F100LEAFB#V0 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, home appliance control, and building automation panels requiring stable component supply, long-term lifecycle assurance, and industrial-grade temperature performance (−40°C to +85°C).

Supply support for R5F100LEAFB#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 industrial, automotive, and enterprise markets.

The RL78/G13 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications - combining ultra-low active/standby current with rich analog and communication peripherals in compact packages.

FAQ

What is the maximum operating frequency and corresponding power consumption of the R5F100LEAFB#V0?

The R5F100LEAFB#V0 operates up to 32 MHz using its high-accuracy on-chip oscillator (±1.0% over −20°C to +85°C). At this frequency, active current is 66 μA per MHz - resulting in approximately 2.1 mA typical at 32 MHz/3.3 V. In STOP mode with only RTC and LVD enabled, it draws just 0.57 μA, enabling multi-year battery operation in intermittent-sensing applications.

Does the R5F100LEAFB#V0 support LIN bus communication, and how is it implemented?

Yes, the R5F100LEAFB#V0 supports LIN 2.2-compliant communication via its UART peripheral. The UART module includes break-detection, sync-field handling, and checksum calculation - all required for LIN master/slave operation. No external transceiver is needed for basic point-to-point or slave-node use; however, an external LIN transceiver (e.g., TJA1020) is required for bus compliance in multi-node automotive or industrial networks.

How does the flash shield window function protect firmware on the R5F100LEAFB#V0?

The flash shield window on the R5F100LEAFB#V0 allows selective read/write protection of defined flash memory regions - preventing unauthorized access to bootloader or cryptographic keys while permitting runtime updates to application sections. This feature is configured via special function registers and enforced by hardware, ensuring that protected areas remain inaccessible even during debug sessions or under fault conditions.

Can the R5F100LEAFB#V0's ADC measure temperature internally, and what is its accuracy?

Yes, the R5F100LEAFB#V0 integrates a factory-calibrated temperature sensor accessible via ANI18 (P147). When used with the internal 1.45 V reference, it provides ±3°C accuracy across −40°C to +85°C - sufficient for thermal derating, ambient monitoring, and self-compensation in precision analog signal chains without adding external sensors.

What packaging and lead finish does the R5F100LEAFB#V0 use, and is it RoHS compliant?

The R5F100LEAFB#V0 uses a 64-pin LFQFP package (10 × 10 mm, 0.50-mm pitch) with matte tin lead finish. It is fully RoHS compliant (Pb-free, halogen-free), rated MSL Level 3, and qualified for industrial temperature operation (−40°C to +85°C). The #V0 suffix indicates tray packaging - compatible with standard SMT pick-and-place equipment.