Renesas R5F104LEAFB#50

Overview

R5F104LEAFB#50 from Renesas is a 64-pin LFQFP (0.5 mm pitch), 48 KB flash, 4 KB data flash, 5.5 KB RAM RL78/G14 16-bit microcontroller operating from 1.6–5.5 V, delivering 44 DMIPS at 32 MHz with ultra-low-power HALT/STOP/SNOOZE modes - deployed in industrial motor control and sensor interface modules requiring RTC, analog sensing, and LIN-compliant UART.

For engineers reviewing the R5F104LEAFB#50 datasheet, R5F104LEAFB#50 pinout, R5F104LEAFB#50 application, or R5F104LEAFB#50 equivalent, this page delivers verified package mapping, confirmed 64-pin LFQFP pin functions, real-world timing and power specs, and two validated alternative parts for design continuity.

Technical Context

The R5F104LEAFB#50 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 12-bit interval timer, calendar-based real-time clock with alarm/correction, and watchdog timer driven by dedicated low-speed oscillator.

Peripheral integration includes up to 20-channel 8/10-bit ADC with internal 1.45 V reference and temperature sensor, dual 8-bit DAC outputs (0–VDD), two comparators with window/high-speed/low-speed modes, and flexible serial interfaces: 3–4 UART/LIN channels, 4–10 I²C channels, and 3–8 CSI (SPI-compatible) channels - all routed via Event Link Controller (ELC) for hardware-triggered event chaining.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP, 10 × 10 mm body, 0.5 mm pitch, lead-free, RoHS compliant (Renesas code PLQP0064KF-A).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LEAFB#50, R5F104LHAFB#50 provides scalable memory headroom without altering PCB layout, while R5F104LEGFB#50 maintains identical functionality under harsher thermal conditions - both preserve full toolchain and middleware compatibility.

Availability

R5F104LEAFB#50 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, home appliance UI panels, energy metering interfaces, and LIN-based diagnostic modules requiring stable component supply across long production lifecycles.

Supply support for R5F104LEAFB#50 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/G14 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and thermally constrained applications - combining ultra-low active/standby current with rich analog and communication peripherals.

FAQ

What is the maximum operating frequency and associated performance of the R5F104LEAFB#50?

The R5F104LEAFB#50 operates up to 32 MHz with a measured performance of 44 DMIPS. This is achieved using the high-speed on-chip oscillator, which supports ±1.0% accuracy across 1.8–5.5 V and -40 to +85°C. The RL78 core's 3-stage pipeline and optimized instruction set enable deterministic real-time response critical for motor control and sensor acquisition in the R5F104LEAFB#50.

Does the R5F104LEAFB#50 support LIN bus communication, and how is it implemented?

Yes, the R5F104LEAFB#50 supports LIN bus communication through its UART peripherals - specifically UART0, UART1, UART2, and UART3 - all of which include LIN-break-detection and sync-field generation features per LIN 2.x specifications. The R5F104LEAFB#50 requires no external transceiver for basic LIN node functionality when paired with a compliant physical layer driver.

What are the data retention and endurance specifications for the data flash memory in the R5F104LEAFB#50?

The R5F104LEAFB#50 integrates 4 KB of on-chip data flash memory rated for 1,000,000 write/erase cycles (typical) with data retention guaranteed for 20 years at 85°C. Rewrites operate across the full VDD range (1.8–5.5 V), and background operation (BGO) allows concurrent program execution - a key capability confirmed in the R5F104LEAFB#50 datasheet for robust firmware and parameter updates.

How does the R5F104LEAFB#50 achieve ultra-low-power operation, and what are the lowest achievable current states?

The R5F104LEAFB#50 achieves ultra-low-power operation via multiple low-power modes: HALT (1.2 μA), STOP (0.60 μA with RTC + LVD active), and SNOOZE (selective peripheral wake-up). These modes leverage the RL78's segmented power gating and clock gating architecture. The 0.60 μA STOP current - verified at VDD = 3.0 V, TA = 25°C - makes the R5F104LEAFB#50 suitable for decade-long battery deployments in wireless sensor nodes.

Is the R5F104LEAFB#50 pin-compatible with other RL78/G14 variants in the same 64-pin LFQFP package?

Yes, the R5F104LEAFB#50 is fully pin-compatible with all other RL78/G14 devices in the 64-pin LFQFP package (e.g., R5F104LHAFB#50, R5F104LEGFB#50), sharing identical pin count, pitch, mechanical footprint (PLQP0064KF-A), and signal assignment. This enables direct substitution within the same hardware design when scaling memory, temperature grade, or flash configuration - a verified characteristic of the RL78/G14 family architecture.