Renesas R5F104LCAFA#V0

Overview

R5F104LCAFA#V0 from Renesas is a 64-pin LQFP-0.65mm 16-bit RL78/G14 microcontroller with 192 KB flash, 20 KB RAM, and 8 KB data flash, operating from 1.6–5.5 V at -40°C to +85°C (A-grade). It delivers 44 DMIPS at 32 MHz, features ultra-low power consumption (66 μA/MHz active, 0.60 μA in RTC+LVD mode), and integrates 12-bit ADC (20 channels), UART/SCI/I²C interfaces, and real-time clock for embedded control.

For engineers reviewing the R5F104LCAFA#V0 datasheet, R5F104LCAFA#V0 pinout, R5F104LCAFA#V0 application, or R5F104LCAFA#V0 equivalent, this page provides verified technical context, package mapping, functional pin roles, low-power design trade-offs, and direct alternative options for industrial sensor nodes, battery-powered HMI, and motor control subsystems.

Technical Context

The R5F104LCAFA#V0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 μs (32 MHz) to 30.5 μs (32.768 kHz). It includes on-chip high-accuracy ±1.0% oscillator (1–64 MHz selectable), event link controller (ELC) for peripheral signal chaining, and data transfer controller (DTC) with block/repeat/chain transfer modes.

Power management includes HALT, STOP, and SNOOZE modes; reset functions integrate POR and 14-level LVD with interrupt/reset selection; memory subsystem supports self-programming with boot swap and flash shield window, plus background operation (BGO) for data flash rewriting while executing code from program memory.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (12 × 12 mm, 0.65 mm pitch), RoHS-compliant, JEDEC standard footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LCAFA#V0, R5F104LDAFA#V0 offers 33% more flash and 20% more RAM for enhanced firmware scalability, while R5F104LEAFA#V0 doubles flash and increases RAM by 60% to host full protocol stacks - all retain identical pinout, timing, and low-power behavior for drop-in migration.

Availability

R5F104LCAFA#V0 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy metering systems, and battery-powered sensor nodes requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F104LCAFA#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/G14 product line delivers true low-power performance for general-purpose embedded control, targeting cost-sensitive industrial automation, home appliances, and metering applications where energy efficiency and code density are critical.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104LCAFA#V0?

The R5F104LCAFA#V0 operates at up to 32 MHz and delivers 44 DMIPS performance. This metric reflects its RL78 CPU core's deterministic execution speed under typical conditions, enabling real-time control tasks such as motor commutation and sensor fusion without external acceleration. The R5F104LCAFA#V0 achieves this while maintaining ultra-low power consumption, making it suitable for both performance- and energy-critical designs.

Does the R5F104LCAFA#V0 support background data flash rewriting while executing application code?

Yes, the R5F104LCAFA#V0 supports Background Operation (BGO) for data flash memory. This allows the device to execute instructions from program memory while simultaneously rewriting the 8 KB data flash - critical for logging, calibration storage, or firmware parameter updates without interrupting real-time control. The R5F104LCAFA#V0 guarantees 1,000,000 rewrite cycles at VDD = 1.8–5.5 V, validated across its full operating temperature range.

What are the supported oscillator options and accuracy specifications for the R5F104LCAFA#V0?

The R5F104LCAFA#V0 integrates a high-accuracy on-chip oscillator with ±1.0% tolerance across VDD = 1.8–5.5 V and TA = -20°C to +85°C, supporting frequencies from 1 MHz to 64 MHz in discrete steps. It also accepts external crystals (e.g., 32.768 kHz for RTC or 1–20 MHz for main clock) via X1/X2 pins. The R5F104LCAFA#V0 does not require external timing components for most applications, reducing BOM cost and board area.

How many analog input channels and what ADC resolution does the R5F104LCAFA#V0 provide?

The R5F104LCAFA#V0 integrates a 12-bit successive approximation register (SAR) ADC with up to 20 analog input channels (ANI0–ANI19), supporting single-ended and differential measurements. It includes internal reference voltage (1.45 V) and temperature sensor, and operates across the full 1.6–5.5 V supply range. This ADC capability enables high-fidelity sensing in applications like smart metering and industrial monitoring where the R5F104LCAFA#V0 serves as the primary analog front-end controller.

What low-power modes are available on the R5F104LCAFA#V0, and what is the minimum current draw?

The R5F104LCAFA#V0 supports HALT, STOP, and SNOOZE low-power modes. In STOP mode with only RTC and LVD active, it draws just 0.60 μA - enabling multi-year operation on coin-cell batteries. HALT mode reduces active current to 66 μA/MHz, and SNOOZE allows selected peripherals to remain operational while CPU sleeps. These modes are fully configurable via software, and the R5F104LCAFA#V0 retains full register state and RAM contents across transitions.