Renesas R5F104BAANA#40

Overview

R5F104BAANA#40 from Renesas is a 32-pin HWQFN-packaged RL78/G14 16-bit microcontroller with 16 KB flash, 2.5 KB RAM, and ultra-low-power operation (66 μA/MHz active, 0.60 μA RTC+LVD mode) for consumer-grade embedded control in battery-powered sensors, home appliances, and industrial HMI panels.

For engineers reviewing the R5F104BAANA#40 datasheet, R5F104BAANA#40 pinout, R5F104BAANA#40 application, or R5F104BAANA#40 equivalent, key selection criteria include its 1.6–5.5 V supply range, 32 MHz max CPU speed, integrated 10-bit ADC (16 channels), UART/SPI/I²C interfaces, and hardware real-time clock with calendar support.

Technical Context

The R5F104BAANA#40 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 µs (32 MHz high-speed oscillator) to 30.5 µs (32.768 kHz subsystem clock). It integrates a Data Transfer Controller (DTC) for autonomous memory transfers and an Event Link Controller (ELC) enabling direct peripheral-to-peripheral event routing without CPU intervention.

Its power management includes HALT, STOP, and SNOOZE modes, plus on-chip LVD with 14 selectable voltage thresholds and POR circuitry. The device supports background data flash rewriting (BGO) with 1M-cycle endurance and operates across −40°C to +85°C (consumer A-grade specification).

Key Specifications

Pinout & Package

Package: 32-pin HWQFN (5 × 5 mm, 0.5 mm pitch) with exposed die pad recommended to be connected to VSS for thermal and electrical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104BAANA#40, R5F104BCANA#40 offers double flash capacity for feature-rich firmware, while R5F104BDANA#40 adds protocol flexibility-both retain identical low-power behavior and pin compatibility, enabling scalable design reuse.

Availability

R5F104BAANA#40 is available at Aetrix Electronics and suitable for smart home sensors, white goods control boards, and industrial HMI panels requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R5F104BAANA#40 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 safety-aware embedded applications requiring rich analog integration and robust real-time performance.

FAQ

What is the maximum operating frequency of the R5F104BAANA#40?

The R5F104BAANA#40 supports a maximum CPU clock frequency of 32 MHz using the on-chip high-speed oscillator. At this speed, it delivers 44 DMIPS performance while maintaining 66 μA/MHz active current consumption. The device also supports lower-frequency operation down to 32.768 kHz for ultra-low-power RTC and LVD monitoring, with instruction execution time scaling accordingly.

Does the R5F104BAANA#40 include an integrated real-time clock (RTC)?

Yes, the R5F104BAANA#40 includes a hardware RTC with calendar function supporting dates up to 99 years, alarm generation, and automatic clock correction. It operates independently in STOP mode using the 32.768 kHz subsystem clock, consuming only 0.60 μA total with LVD enabled-making it ideal for time-stamped logging and scheduled wake-up in battery-powered systems.

How much flash and RAM does the R5F104BAANA#40 provide?

The R5F104BAANA#40 integrates 16 KB of code flash memory and 4 KB of data flash memory, along with 2.5 KB of on-chip RAM. The code flash supports block erase (1 KB), security lock bits, and self-programming with boot swapping. The data flash enables background rewriting (BGO) with 1,000,000 write cycles and operates across the full 1.8–5.5 V supply range.

What communication interfaces are available on the R5F104BAANA#40?

The R5F104BAANA#40 provides three UART channels (one supporting LIN bus), up to eight CSI/SPI channels, and four to ten I²C/simplified I²C channels depending on configuration. All serial interfaces are accessible via programmable I/O redirection registers (PIOR0/1), allowing flexible pin assignment without hardware changes-critical for layout optimization and variant management.

Is the R5F104BAANA#40 pin-compatible with other RL78/G14 variants in the same package?

Yes, the R5F104BAANA#40 is fully pin-compatible with all other 32-pin HWQFN RL78/G14 devices-including R5F104BCANA#40, R5F104BDANA#40, and R5F104BEANA#40-sharing identical pin count, pitch, footprint, and signal mapping. This enables seamless firmware and PCB reuse across memory and peripheral variants within the same package family.