Renesas R5F101LFAFB#V0

Overview

R5F101LFAFB#V0 from Renesas is a 64-pin LFQFP, 0.5-mm pitch, 128 KB flash, 8 KB RAM, 12-bit A/D, RTC-equipped RL78/G13 16-bit microcontroller operating from 1.6 V to 5.5 V with ultra-low-power STOP mode (0.57 μA) and 41 DMIPS at 32 MHz - deployed in industrial motor control interfaces requiring deterministic timing and low standby consumption.

For engineers reviewing the R5F101LFAFB#V0 datasheet, R5F101LFAFB#V0 pinout, R5F101LFAFB#V0 application, or R5F101LFAFB#V0 equivalent, this page delivers verified package mapping, validated peripheral configuration, confirmed memory partitioning, real-world power-mode trade-offs, and direct alternative part comparisons for rapid BOM validation and embedded firmware architecture decisions.

Technical Context

The R5F101LFAFB#V0 implements the RL78 CPU core with 3-stage CISC pipeline, supporting instruction execution times from 0.03125 μs (32 MHz high-speed on-chip oscillator) to 30.5 μs (32.768 kHz subsystem clock), and features 1 MB address space with four register banks of eight 8-bit registers each. It integrates a 12-bit interval timer, calendar-based real-time clock with alarm and correction, and watchdog timer driven by dedicated low-speed oscillator.

Peripheral integration includes up to 16 channels of 16-bit timer, 3–10 channels of I²C/Simplified I²C, 2–4 UART/LIN channels, 2–8 CSI (SPI-compatible) channels, and DMA controller with 4 channels supporting 2-clock transfers between SFR and RAM - all operating within the same 1.6–5.5 V supply range and -40°C to +85°C ambient temperature grade (D-grade).

Key Specifications

Pinout & Package

Package: 64-pin LFQFP (10 × 10 mm, 0.5-mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LFAFB#V0, the R5F101LFAFB#V0 trades data flash capability for simplified firmware update architecture and reduced test complexity, while the RL78/G14 alternative provides scalable memory and peripherals at the cost of layout compatibility - making R5F101LFAFB#V0 optimal for cost-sensitive, fixed-function industrial controllers where external NV memory is acceptable.

Availability

R5F101LFAFB#V0 is available at Aetrix Electronics and suitable for industrial motor control interfaces, smart building HVAC controllers, factory automation I/O modules, medical infusion pump controllers, and battery-backed sensor nodes requiring stable component supply across extended production lifecycles.

Supply support for R5F101LFAFB#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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for automotive, industrial, and IoT markets.

The RL78/G13 product line targets cost-optimized, ultra-low-power general-purpose embedded applications - designed to replace legacy 8-bit MCUs while delivering 16-bit performance, integrated analog, and robust industrial-grade reliability.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F101LFAFB#V0?

The R5F101LFAFB#V0 achieves a maximum operating frequency of 32 MHz using its high-speed on-chip oscillator, delivering 41 DMIPS of processing performance. This benchmark reflects the RL78 CPU core's efficiency in executing compiled C code under typical conditions, and is validated across the full -40°C to +85°C temperature range specified for the D-grade industrial version of the R5F101LFAFB#V0.

Does the R5F101LFAFB#V0 include on-chip data flash memory?

No, the R5F101LFAFB#V0 does not include on-chip data flash memory. The "101" in the part number explicitly denotes absence of data flash, distinguishing it from the "100" series (e.g., R5F100LFAFB#V0) which integrates 4 KB of data flash. Designers must implement external nonvolatile storage (e.g., I²C EEPROM or SPI FRAM) for calibration data, device configuration, or event logs when using the R5F101LFAFB#V0.

What package type and pin pitch does the R5F101LFAFB#V0 use?

The R5F101LFAFB#V0 uses a 64-pin LFQFP (Low-profile Fine-pitch Quad Flat Package) with 10 mm × 10 mm body size and 0.5-mm pin pitch. The "FB" suffix in the part number confirms the LFQFP package, and the "#V0" suffix indicates tray packaging - consistent with Renesas' standard ordering nomenclature for industrial-grade QFP devices.

What are the key low-power modes supported by the R5F101LFAFB#V0 and their typical current draw?

The R5F101LFAFB#V0 supports HALT mode (66 μA/MHz), STOP mode (0.57 μA with RTC and LVD active), and SNOOZE mode (selective peripheral wake-up). These modes are fully characterized over the -40°C to +85°C industrial temperature range. STOP mode current is measured with only the real-time clock and low-voltage detector enabled - enabling decade-long battery operation in metering and remote monitoring applications.

Which communication interfaces are available on the R5F101LFAFB#V0 and how many channels does each support?

The R5F101LFAFB#V0 integrates up to 3 I²C/Simplified I²C channels, 2 UART/LIN channels, and 2 CSI (SPI-compatible) channels. All interfaces operate within the same 1.6–5.5 V supply range and share multiplexed pins - for example, P10 serves as both SCK00 (SPI clock) and SCL00 (I²C clock), allowing flexible peripheral assignment based on system-level signal routing constraints.