Renesas R5F101LEAFB#V0

Overview

R5F101LEAFB#V0 from Renesas is a 64-pin LFQFP-0.5mm, 16 KB flash, no data flash, industrial-grade (−40°C to +85°C) RL78/G13 16-bit MCU with 4 KB RAM, 32 MHz max CPU speed, and ultra-low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD). It targets battery-powered sensor nodes and smart metering interfaces requiring deterministic real-time control.

For engineers reviewing the R5F101LEAFB#V0 datasheet, R5F101LEAFB#V0 pinout, R5F101LEAFB#V0 application, or R5F101LEAFB#V0 equivalent, key selection criteria include its 64-pin LFQFP package, absence of on-chip data flash, −40°C to +85°C industrial temperature rating, and support for UART/LIN, I²C, and 16-bit timers in compact embedded control designs.

Technical Context

The R5F101LEAFB#V0 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, enabling instruction execution times from 0.03125 μs (32 MHz HS mode) to 30.5 μs (32.768 kHz subsystem clock). It integrates a 12-bit interval timer, calendar-capable real-time clock (RTC), and watchdog timer driven by a dedicated low-speed on-chip oscillator.

Its peripheral set includes up to 16 channels of 16-bit timer, 3–10 I²C/Simplified I²C channels, 2–4 UART/LIN interfaces, and an 8/10-bit A/D converter with up to 26 analog inputs and internal 1.45 V reference-configured without data flash for cost-sensitive firmware-only applications.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LEAFB#V0, the R5F101LEAFB#V0 reduces BOM cost by omitting data flash while retaining full peripheral and timing capability; versus R5F101LDFAFA#V0, it offers finer 0.5-mm pitch for higher-density layouts but requires tighter assembly tolerances.

Availability

R5F101LEAFB#V0 is available at Aetrix Electronics and suitable for smart energy meters, industrial sensor nodes, home appliance control, building automation controllers, and battery-powered IoT edge devices requiring stable component supply across multi-year production cycles.

Supply support for R5F101LEAFB#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 family delivers true low-power 16-bit performance for general-purpose embedded control, targeting cost-sensitive applications where energy efficiency, integration, and qualification for industrial environments are critical.

FAQ

What is the maximum operating frequency of the R5F101LEAFB#V0?

The R5F101LEAFB#V0 supports a maximum CPU operating frequency of 32 MHz using the high-speed on-chip oscillator, delivering 41 DMIPS of processing performance. This frequency is achievable across the full 1.6 V to 5.5 V supply range and −40°C to +85°C temperature range, with oscillator accuracy maintained at ±1.0% under specified conditions. The R5F101LEAFB#V0 also supports lower-frequency subsystem clocks down to 32.768 kHz for ultra-low-power RTC operation.

Does the R5F101LEAFB#V0 include on-chip data flash memory?

No, the R5F101LEAFB#V0 does not include on-chip data flash memory. As indicated by the "101" in its part number (per Renesas RL78/G13 documentation), this variant provides only 16 KB of code flash memory and 4 KB of RAM, with no dedicated data flash block. This distinguishes it from the "100" series (e.g., R5F100LEAFB#V0), which includes 4 KB of data flash. The R5F101LEAFB#V0 is optimized for applications where firmware storage suffices and data logging or field-updatable parameters are handled externally.

What package type and pin count does the R5F101LEAFB#V0 use?

The R5F101LEAFB#V0 uses a 64-pin LFQFP (Low-profile Fine-pitch Quad Flat Package) with 0.50-mm pitch, measuring 10 mm × 10 mm. The "FB" suffix in the part number explicitly denotes the LFQFP-0.5mm package per Renesas' ordering convention, and the "#V0" indicates tray packaging. This package provides 52 usable GPIOs plus power, ground, reset, and clock pins, and is RoHS-compliant with moisture sensitivity level 3.

What is the operating temperature range for the R5F101LEAFB#V0?

The R5F101LEAFB#V0 is rated for industrial operation from −40°C to +85°C. This temperature grade is confirmed by the "D" suffix in its full Renesas ordering designation (R5F101LEADFB#V0), which corresponds to the industrial temperature range per RL78/G13 documentation. It is not rated for the extended −40°C to +105°C range (denoted by "G") nor the consumer −40°C to +85°C range with different qualification testing (denoted by "A").

Which communication interfaces are supported by the R5F101LEAFB#V0?

The R5F101LEAFB#V0 supports multiple serial interfaces: up to 4 channels of UART/LIN (with LIN bus protocol support), 3 to 10 channels of I²C/Simplified I²C, and 2 to 8 channels of CSI (Renesas' SPI-compatible interface). These are implemented in hardware with independent registers and interrupt vectors. The exact channel count depends on pin multiplexing configuration; the 64-pin LFQFP package enables full utilization of these interfaces, including simultaneous UART + I²C + CSI operation for multi-protocol gateway applications.