Renesas R5F104FAAFP#X0

Overview

R5F104FAAFP#X0 from Renesas is a 44-pin LQFP, 0.8 mm pitch, 96 KB flash, 12 KB RAM RL78/G14 16-bit microcontroller operating from 1.6–5.5 V, delivering 44 DMIPS at 32 MHz with true low-power operation (66 μA/MHz active, 0.60 μA RTC+LVD mode), used in battery-powered industrial sensors and smart metering interfaces.

For engineers reviewing the R5F104FAAFP#X0 datasheet, R5F104FAAFP#X0 pinout, R5F104FAAFP#X0 application, or R5F104FAAFP#X0 equivalent, key selection criteria include its 44-pin LQFP-0.8 mm package, 96 KB code flash with data flash shield window, integrated RTC with calendar/alarm, and dual UART/LIN support for reliable serial communication in constrained environments.

Technical Context

The R5F104FAAFP#X0 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), and includes multiply/divide/accumulate instructions within a 1 MB address space. It integrates a 12-bit interval timer, real-time clock with 99-year calendar, and watchdog timer with dedicated low-speed oscillator.

Peripheral integration includes up to 8-channel 10-bit A/D converter (20 inputs), two 8-bit D/A channels, two comparators, 4–10 I²C channels, 3–4 UART/LIN interfaces, and 3–8 CSI/SPI channels-all managed via Event Link Controller (ELC) for hardware-triggered peripheral chaining without CPU intervention.

Key Specifications

Pinout & Package

Package: 44-pin LQFP (10 × 10 mm, 0.8 mm pitch), RoHS-compliant, plastic body with exposed pad not applicable (LQFP).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104FAAFP#X0, R5F104FGAFP#X0 provides scalable memory headroom without layout changes, while R5F104FEAFP#X0 reduces silicon cost and power at the expense of analog capability and firmware flexibility-making it suitable only for minimal-feature deployments.

Availability

R5F104FAAFP#X0 is available at Aetrix Electronics and suitable for smart energy meters, industrial sensor nodes, and home appliance control systems requiring stable component supply across extended product lifecycles.

Supply support for R5F104FAAFP#X0 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 ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated industrial and consumer devices requiring high integration, robust timing, and long-term supply assurance.

FAQ

What is the maximum operating frequency and corresponding power consumption of the R5F104FAAFP#X0?

The R5F104FAAFP#X0 operates up to 32 MHz with 44 DMIPS performance and consumes 66 μA per MHz in active mode. At full speed, typical current draw is ~2.1 mA (32 MHz × 66 μA/MHz). In STOP mode with RTC and LVD active, it draws just 0.60 μA-enabling decade-long operation on coin-cell batteries. This value is measured at VDD = 3.0 V, TA = 25°C per R01DS0053EJ0340.

Does the R5F104FAAFP#X0 support LIN bus communication, and which UART channels implement it?

Yes, the R5F104FAAFP#X0 supports LIN 2.2 protocol on both UART2 (P13/P14) and UART3 (P15/P16) channels. Each UART includes automatic LIN break detection, sync field handling, and checksum generation-verified in Section 24.3.2 of R01DS0053EJ0340. No external transceiver is required for basic LIN slave functionality.

What is the flash memory organization and security capability of the R5F104FAAFP#X0?

The R5F104FAAFP#X0 contains 96 KB of code flash organized in 1 KB blocks, with programmable block erase/write prohibition for IP protection. It supports self-programming with boot swap and flash shield window functions-allowing secure firmware updates without exposing critical sections. Data flash is 8 KB, rated for 1,000,000 write cycles at VDD = 1.8–5.5 V.

Can the R5F104FAAFP#X0 operate from a 1.8 V supply, and what peripherals remain functional at that voltage?

Yes, the R5F104FAAFP#X0 supports 1.8 V operation across its full −40°C to +85°C range. At 1.8 V, all core functions, 10-bit ADC (with internal 1.45 V reference), RTC, 16-bit timers, UART, I²C, and CSI remain fully operational. The high-speed on-chip oscillator maintains ±1.0% accuracy, and I/O ports support 1.8/2.5/3 V level-shifting per Section 1.1.

How many analog input channels does the R5F104FAAFP#X0 support, and what reference options are available?

The R5F104FAAFP#X0 supports 20 analog input channels (ANI0–ANI19) with 10-bit resolution. Reference options include external AVREFP/AVREFM pins, internal 1.45 V bandgap reference, and internal temperature sensor output. The ADC operates across the full 1.6–5.5 V VDD range, with typical INL of ±1 LSB per R01DS0053EJ0340 Section 23.3.