Renesas R5F104LFAFA#V0

Overview

R5F104LFAFA#V0 from Renesas is a 64-pin LQFP-0.65mm 16-bit RL78/G14 microcontroller with 512 KB flash, 48 KB RAM, and 8 KB data flash, operating at 32 MHz (44 DMIPS), supporting ultra-low-power modes (0.60 μA RTC+LVD), 10-bit ADC (20 channels), dual DAC, and integrated real-time clock for industrial control and sensor interface applications.

For engineers reviewing the R5F104LFAFA#V0 datasheet, R5F104LFAFA#V0 pinout, R5F104LFAFA#V0 application, or R5F104LFAFA#V0 equivalent, key selection criteria include its 64-pin LQFP-0.65 mm package, -40°C to +85°C industrial temperature grade (A-field), 1.6–5.5 V supply range, and support for background data flash rewriting with 1M-cycle endurance.

Technical Context

The R5F104LFAFA#V0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, enabling instruction execution times from 0.03125 μs (32 MHz) to 30.5 μs (32.768 kHz), and includes multiply/divide/accumulate instructions. It integrates an Event Link Controller (ELC) for hardware-triggered peripheral chaining and a Data Transfer Controller (DTC) supporting block, repeat, and chain transfers activated by interrupts.

Its timing subsystem combines a high-accuracy ±1.0% on-chip oscillator (selectable 1–64 MHz), dedicated low-speed oscillator for watchdog, and calendar-mode real-time clock with alarm and correction functions. Power management includes HALT, STOP, and SNOOZE modes, plus on-chip POR and 14-level LVD with interrupt/reset options.

Key Specifications

Pinout & Package

Package: 64-pin LQFP, 12 × 12 mm body, 0.65 mm pitch, exposed pad not applicable (plastic package).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LFAFA#V0, the R5F104LGAFP#V0 reduces flash/RAM capacity for lower unit cost without altering pinout or peripheral set, while the R5F104LHAFP#V0 maintains identical memory and features but qualifies for +105°C operation-enabling drop-in use in thermally demanding deployments.

Availability

R5F104LFAFA#V0 is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor nodes, energy metering modules, and home appliance motor control systems requiring stable component supply across long production lifecycles.

Supply support for R5F104LFAFA#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/G14 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive industrial and consumer applications requiring robust peripheral integration, long battery life, and seamless toolchain support with e² studio and CS+.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F104LFAFA#V0?

The R5F104LFAFA#V0 operates at up to 32 MHz, delivering 44 DMIPS. Its high-accuracy on-chip oscillator supports frequencies from 1 MHz to 64 MHz with ±1.0% tolerance across 1.8–5.5 V and -20°C to +85°C. At 32 MHz, minimum instruction time is 0.03125 μs; at 32.768 kHz, it extends to 30.5 μs for ultra-low-power RTC operation. The R5F104LFAFA#V0 achieves this performance within its 1.6–5.5 V supply range and 64-pin LQFP package.

Does the R5F104LFAFA#V0 support in-system programming and secure firmware updates?

Yes, the R5F104LFAFA#V0 supports full in-system programming via its on-chip debug interface and includes a flash shield window function to prevent unauthorized readout. It implements self-programming with boot swap capability, allowing atomic firmware updates by switching between two independent flash banks. This ensures zero-downtime field upgrades and protects against corruption during power loss. The R5F104LFAFA#V0 also supports block-erase prohibition for secure code regions.

How does the R5F104LFAFA#V0 manage power in battery-operated applications?

The R5F104LFAFA#V0 provides three ultra-low-power modes: HALT (66 μA/MHz), STOP (0.60 μA with RTC + LVD active), and SNOOZE (low-latency wake from peripheral events). Its on-chip voltage detector offers 14 programmable threshold levels for brown-out detection with interrupt or reset options. Combined with 1.6 V minimum operating voltage and internal POR, the R5F104LFAFA#V0 sustains reliable operation across wide battery discharge curves in portable and remote sensor applications.

What analog peripherals are integrated into the R5F104LFAFA#V0 and how are they calibrated?

The R5F104LFAFA#V0 integrates a 10-bit SAR ADC with 20 input channels, dual 8-bit DACs (0–VDD output), two comparators, and an on-chip temperature sensor with 1.45 V internal reference voltage. ADC offset/gain calibration is supported via dedicated registers, and the temperature sensor is factory-trimmed for ±2°C accuracy from -40°C to +85°C. The R5F104LFAFA#V0 uses these resources for precision sensor signal conditioning without external components.

Can the R5F104LFAFA#V0 replace older RL78/G13 devices in existing designs?

The R5F104LFAFA#V0 is not a direct pin-compatible replacement for RL78/G13 due to differences in peripheral register mapping, pin function allocation (e.g., enhanced ELC/ELC2, additional DAC channels), and memory layout. While both share the RL78 core and toolchain compatibility, migration requires firmware adaptation and PCB review-particularly for REGC capacitor placement, crystal load capacitance, and I/O redirection register usage. The R5F104LFAFA#V0 offers higher integration and lower power but is not a drop-in substitute.