Renesas R5F104BFAFP#X0

Overview

R5F104BFAFP#X0 from Renesas is a 32-pin LQFP-0.8 mm pitch, 96 KB flash, 12 KB RAM RL78/G14 16-bit microcontroller with ultra-low power consumption (66 μA/MHz), integrated 10-bit A/D converter (16 channels), real-time clock, and dual UART/SPI/I²C interfaces. It targets battery-powered industrial sensor nodes and smart metering endpoints requiring long runtime and mixed-signal control.

For engineers reviewing the R5F104BFAFP#X0 datasheet, R5F104BFAFP#X0 pinout, R5F104BFAFP#X0 application, or R5F104BFAFP#X0 equivalent, key selection criteria include its 96 KB code flash with data flash shield window, 1.6–5.5 V single-supply operation, STOP/HALT/SNOOZE low-power modes, and support for LIN-bus communication via UART.

Technical Context

The R5F104BFAFP#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). It integrates a Data Transfer Controller (DTC) for autonomous memory transfers triggered by peripherals and an Event Link Controller (ELC) enabling direct hardware-to-hardware signal routing without CPU intervention.

Its analog subsystem includes a 10-bit A/D converter with internal 1.45 V reference and temperature sensor, plus two comparator channels with selectable high/low-speed and window modes. The on-chip high-accuracy ±1.0% oscillator supports 12 frequency options from 1 to 64 MHz, eliminating external crystal dependency in cost-sensitive designs.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, JEDEC standard PLQP0032GB-A footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104BFAFP#X0, the R5F104GFAFP#X0 provides 160 KB additional flash for complex protocol stacks or GUI assets, while the R5F104BFASP#V0 trades 2 GPIOs and thermal performance for 35% smaller board area - both retain identical low-power behavior and peripheral compatibility.

Availability

R5F104BFAFP#X0 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and home appliance control requiring stable component supply, long-term lifecycle assurance, and industrial-temperature grade reliability.

Supply support for R5F104BFAFP#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, and power 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 industrial and consumer devices requiring rich analog integration and robust real-time control.

FAQ

What is the maximum operating frequency of the R5F104BFAFP#X0?

The R5F104BFAFP#X0 supports up to 32 MHz operation using the high-speed on-chip oscillator. Its minimum instruction execution time is 0.03125 μs at this frequency, delivering 44 DMIPS performance. The oscillator accuracy is ±1.0% across the full 1.8–5.5 V supply and -40°C to +85°C temperature range, eliminating need for external crystals in many applications.

Does the R5F104BFAFP#X0 support LIN bus communication?

Yes, the R5F104BFAFP#X0 supports LIN bus communication through its UART peripheral. One of its three UART channels includes LIN-bus protocol support, enabling direct connection to LIN transceivers for automotive body electronics or industrial sub-networks. The UART's built-in break detection, sync byte handling, and checksum generation simplify LIN slave node implementation without software overhead.

How much data flash memory does the R5F104BFAFP#X0 include?

The R5F104BFAFP#X0 includes 4 KB of data flash memory. This memory supports background operation (BGO), allowing CPU code execution from program flash while rewriting data flash. It is rated for 1,000,000 write/erase cycles at VDD = 1.8–5.5 V and is protected by flash shield window and block erase prohibition features for secure parameter storage.

What low-power modes are available on the R5F104BFAFP#X0?

The R5F104BFAFP#X0 offers HALT, STOP, and SNOOZE low-power modes. In STOP mode with only RTC and LVD active, current consumption is 0.60 μA - enabling multi-year battery life in metering applications. HALT mode draws 0.23 μA, and SNOOZE enables fast wake-up (< 3.5 μs) from peripheral events like UART reception or A/D completion, balancing responsiveness and energy savings.

Is the R5F104BFAFP#X0 pin-compatible with other RL78/G14 variants in the same package?

Yes, all RL78/G14 devices in the 32-pin LQFP (PLQP0032GB-A) package - including R5F104BFAFP#X0, R5F104GFAFP#X0, and R5F104LFAFP#X0 - share identical pinouts and electrical characteristics. This allows hardware design reuse across memory variants, simplifying BOM management and enabling firmware scalability without PCB revision.