Renesas R5F104LEAFB#V0

Overview

R5F104LEAFB#V0 from Renesas is a 64-pin LFQFP, 0.5 mm pitch, 48 KB flash, 5.5 KB RAM, 32 MHz RL78/G14 16-bit microcontroller operating from 1.6–5.5 V, delivering 44 DMIPS and ultra-low power consumption (66 μA/MHz active, 0.60 μA RTC+LVD mode), designed for battery-powered industrial sensor nodes and smart metering interfaces.

For engineers reviewing the R5F104LEAFB#V0 datasheet, R5F104LEAFB#V0 pinout, R5F104LEAFB#V0 application, or R5F104LEAFB#V0 equivalent, key selection criteria include its 64-pin LFQFP-0.5 mm package, integrated 10-bit 20-channel ADC with temperature sensor, dual UART/LIN support, and hardware DTC/ELC for deterministic low-power peripheral coordination.

Technical Context

The R5F104LEAFB#V0 implements the RL78 CPU core with 3-stage pipeline, supporting instruction execution times from 0.03125 μs (32 MHz) to 30.5 μs (32.768 kHz), and includes on-chip debug, self-programming with boot swap, and background data flash rewriting (BGO).

It integrates a 19–26-event Event Link Controller (ELC) for direct peripheral triggering without CPU intervention, plus a Data Transfer Controller (DTC) supporting normal, repeat, block, and chain transfer modes activated by interrupt sources - enabling deterministic real-time response in resource-constrained embedded systems.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP, 10 mm × 10 mm, 0.5 mm pitch, exposed pad not applicable (non-HWQFN). Compliant with JEDEC MO-220 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LGAFB#V0 and R5F104LEAFP#V0, the R5F104LEAFB#V0 provides optimal cost-performance balance for mid-complexity industrial controls where 48 KB flash suffices and 0.5 mm pitch enables higher board density.

Availability

R5F104LEAFB#V0 is available at Aetrix Electronics and suitable for smart utility metering, industrial sensor nodes, home appliance motor control, and building automation controllers requiring stable component supply across long product lifecycles.

Supply support for R5F104LEAFB#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 infrastructure markets.

The RL78/G14 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications requiring high integration and long-term reliability.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104LEAFB#V0?

The R5F104LEAFB#V0 operates up to 32 MHz with a measured performance of 44 DMIPS. This value is derived from the RL78 CPU core's 3-stage pipeline architecture and confirmed in Renesas' benchmark testing under typical conditions (VDD = 3.3 V, TA = 25°C). The R5F104LEAFB#V0 achieves this performance while maintaining ultra-low active current (66 μA/MHz), making it suitable for compute-constrained yet power-sensitive applications.

Does the R5F104LEAFB#V0 support hardware LIN bus communication, and which pins implement it?

Yes, the R5F104LEAFB#V0 supports LIN bus communication via its UART peripherals with dedicated LIN features including break detection, sync field generation, and checksum calculation per ISO 17987-4. Pins P13 (TxD2), P14 (RxD2), and P15 (SCK20/SCL20) can be configured for LIN master/slave operation. The R5F104LEAFB#V0 does not require external transceivers for basic LIN physical layer interfacing when used with appropriate external driver circuitry.

What are the flash memory organization and write endurance specifications for the R5F104LEAFB#V0?

The R5F104LEAFB#V0 contains 48 KB of code flash memory organized in 1 KB blocks, and 4 KB of data flash memory. Code flash supports erase/write cycles ≥100,000 times, while data flash guarantees ≥1,000,000 write cycles (typical) at VDD = 1.8–5.5 V. Both memories support self-programming with boot swap and flash shield window functions, and the R5F104LEAFB#V0 includes hardware BGO to execute code during data flash rewriting.

How many analog input channels and what ADC resolution does the R5F104LEAFB#V0 provide?

The R5F104LEAFB#V0 integrates a 10-bit successive-approximation ADC with up to 20 analog input channels (ANI0–ANI19), including dedicated AVREFP/AVREFM pins for precision referencing. It also includes an internal 1.45 V reference and calibrated temperature sensor channel. The ADC supports single- or continuous-conversion modes, programmable sample-and-hold timing, and conversion results can be automatically transferred via DTC - all features confirmed for the R5F104LEAFB#V0 in the RL78/G14 datasheet Rev. 3.40.

Is the R5F104LEAFB#V0 pin-compatible with other RL78/G14 variants in the same package, and what is the recommended decoupling for REGC?

The R5F104LEAFB#V0 is pin-compatible with all RL78/G14 64-pin LFQFP-0.5 mm variants (e.g., R5F104LGAFB#V0, R5F104LHAFB#V0) sharing the same pin count and package type. For REGC, Renesas specifies a 0.47–1.0 μF ceramic capacitor connected directly to VSS, placed as close as possible to the pin - this ensures stable internal voltage regulation during transient load changes and is mandatory per the R5F104LEAFB#V0 hardware design guidelines.