Renesas R5F101LCAFB#V0

Overview

R5F101LCAFB#V0 from Renesas is a 64-pin LFQFP-packaged RL78/G13 16-bit microcontroller with 128 KB flash memory, 12 KB RAM, and no data flash, designed for ultra-low-power embedded control in industrial temperature range (–40°C to +85°C). It delivers 41 DMIPS at 32 MHz, supports 1.6–5.5 V operation, and integrates RTC, 10-bit ADC (26 channels), UART/SPI/I²C interfaces, and multiple low-power modes including STOP and SNOOZE.

For engineers reviewing the R5F101LCAFB#V0 datasheet, R5F101LCAFB#V0 pinout, R5F101LCAFB#V0 application, or R5F101LCAFB#V0 equivalent, key selection criteria include its 64-pin LFQFP-0.5mm pitch package, absence of on-chip data flash, industrial-grade operating temperature, and compatibility with Renesas' RL78 toolchain and IAR/CC-RL compilers.

Technical Context

The R5F101LCAFB#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 subsystem clock). Its memory map includes 1 MB address space, with flash configured in 1 KB blocks and security features prohibiting unauthorized block erase.

Power management includes on-chip POR and LVD with 14 selectable voltage detection levels, DMA controller (4 channels), and peripheral clock gating. Real-time clock functionality provides calendar support up to 99 years, alarm, and clock correction-operable independently during STOP mode with dedicated low-speed oscillator.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP, 10 mm × 10 mm, 0.5 mm pitch, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F101LCAFB#V0, R5F101LCDFB#V0 adds 4 KB data flash for runtime parameter storage without external components, while R5F100LCAFB#V0 provides double the data flash (8 KB) and retains full code flash capacity - both maintain identical pinout, power, and peripheral compatibility.

Availability

R5F101LCAFB#V0 is available at Aetrix Electronics and suitable for smart energy meters, industrial I/O modules, home appliance controllers, and portable medical devices requiring stable component supply across extended production lifecycles.

Supply support for R5F101LCAFB#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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G13 product line targets cost-sensitive, ultra-low-power general-purpose embedded applications - emphasizing energy efficiency, integrated peripherals, and seamless toolchain support for rapid development.

FAQ

What is the maximum operating frequency and performance rating of the R5F101LCAFB#V0?

The R5F101LCAFB#V0 operates at up to 32 MHz and delivers 41 DMIPS of processing performance. Its high-accuracy on-chip oscillator maintains ±1.0% tolerance across –20°C to +85°C ambient, eliminating the need for external crystals in many timing-critical applications. This performance level supports real-time control loops, communication protocol stacks, and sensor fusion tasks within the R5F101LCAFB#V0's power envelope.

Does the R5F101LCAFB#V0 include on-chip data flash memory?

No, the R5F101LCAFB#V0 does not include on-chip data flash memory. It features 128 KB of code flash and 12 KB of RAM only. The "101" in the part number explicitly denotes absence of data flash, distinguishing it from "100" variants like R5F100LCAFB#V0 which integrate 8 KB data flash. For applications requiring nonvolatile parameter storage, R5F101LCDFB#V0 (4 KB data flash) or R5F100LCAFB#V0 is recommended instead of R5F101LCAFB#V0.

What package type and pin count does the R5F101LCAFB#V0 use?

The R5F101LCAFB#V0 uses a 64-pin LFQFP (Low-profile Fine-pitch Quad Flat Package) with 0.5 mm pitch, measuring 10 mm × 10 mm. The "FB" suffix in the part number confirms the LFQFP package, and "#V0" indicates tray packaging. This package is RoHS-compliant, lead-free, and compatible with standard surface-mount assembly processes used in industrial and consumer electronics manufacturing.

What are the supported low-power modes on the R5F101LCAFB#V0, and what is the lowest current consumption?

The R5F101LCAFB#V0 supports HALT, STOP, and SNOOZE low-power modes. In STOP mode with only RTC and LVD active, it consumes just 0.57 μA - enabling multi-year battery operation in metering and sensor applications. HALT mode draws 66 μA/MHz, and SNOOZE allows selective peripheral operation (e.g., UART receive) while keeping CPU halted. All modes retain RAM content and support fast wake-up via interrupt or external event, critical for responsive R5F101LCAFB#V0-based designs.

Which communication interfaces are integrated into the R5F101LCAFB#V0?

The R5F101LCAFB#V0 integrates multiple hardware serial interfaces: up to 10 channels of simplified I²C, 2–4 channels of UART (with LIN-bus support), and 2–8 channels of CSI (Renesas' SPI-compatible interface). These are mapped across P0–P2 port groups and support simultaneous operation. No external transceivers are needed for basic UART or I²C communication, and CSI eliminates bit-banging overhead for SPI-like protocols - enhancing real-time determinism in R5F101LCAFB#V0 applications.