Renesas R5F104BAANA#U0

Overview

R5F104BAANA#U0 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). It integrates an RL78 CPU core, 10-bit ADC (8 channels), UART/SPI/I²C interfaces, and real-time clock-targeting battery-powered sensor nodes and industrial control panels.

For engineers reviewing the R5F104BAANA#U0 datasheet, R5F104BAANA#U0 pinout, R5F104BAANA#U0 application, or R5F104BAANA#U0 equivalent, key selection criteria include its 32-pin 5×5 mm HWQFN package, -40°C to +85°C A-grade temperature range, 1.6–5.5 V supply, and support for SNOOZE mode power management in energy-constrained embedded designs.

Technical Context

The R5F104BAANA#U0 implements the RL78 CISC CPU core with 3-stage pipeline, supporting instruction execution times from 0.03125 μs (32 MHz) to 30.5 μs (32.768 kHz). It features on-chip high-accuracy oscillator (±1.0% over -20 to +85°C) and dual-clock domain architecture enabling independent subsystem clocking for RTC and low-power peripherals.

Its peripheral set includes Timer Array Unit (TAU) with up to 8 channels, 1-channel 12-bit interval timer, 1-channel real-time clock with calendar and alarm, and Event Link Controller (ELC) for hardware-triggered peripheral chaining-enabling deterministic timing without CPU intervention in motor control and metering applications.

Key Specifications

Pinout & Package

Package: 32-pin HWQFN (5 × 5 mm, 0.5 mm pitch), exposed die pad recommended to be connected to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104BAANA#U0, R5F104BCANA#U0 provides headroom for feature-rich firmware updates, while R5F104BDANA#U0 delivers extra peripheral concurrency-both retain identical low-power behavior and A-grade temperature rating for drop-in compatibility in layout-constrained designs.

Availability

R5F104BAANA#U0 is available at Aetrix Electronics and suitable for smart energy meters, industrial sensor nodes, and home appliance control panels requiring stable component supply across production lifecycles.

Supply support for R5F104BAANA#U0 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 management solutions for automotive, industrial, and IoT markets.

The RL78/G14 product line delivers true low-power embedded control with integrated analog peripherals and flexible clocking-designed specifically for cost-sensitive, battery-operated, and thermally constrained applications in consumer and industrial equipment.

FAQ

What is the maximum operating frequency of the R5F104BAANA#U0?

The R5F104BAANA#U0 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, and it also supports ultra-low-speed operation down to 32.768 kHz for RTC and low-power modes. The oscillator accuracy is ±1.0% across 1.8–5.5 V and -20 to +85°C, eliminating need for external crystals in many applications. This specification applies directly to the R5F104BAANA#U0 variant.

Does the R5F104BAANA#U0 include a hardware debug interface?

Yes, the R5F104BAANA#U0 includes an on-chip debug function compliant with Renesas E1/E20 emulators. It supports full-speed debugging, flash programming, and real-time trace via the TOOL0/TOOLRxD/TOOLTxD pins (P40, P50, P51). No external debug probe components are required-debug access is enabled by default and secured via flash lock bits. This capability is confirmed for the R5F104BAANA#U0 in the RL78/G14 datasheet Rev. 3.40.

How many analog input channels does the R5F104BAANA#U0 support?

The R5F104BAANA#U0 supports 8 analog input channels (ANI0–ANI7) with 10-bit resolution and programmable sampling time. It includes internal reference voltage (1.45 V) and an integrated temperature sensor for calibration. Channel mapping is fixed per pin assignment-e.g., ANI0 on P20, ANI1 on P21-and no external multiplexer is needed for basic 8-channel acquisition. This configuration is explicitly defined for the R5F104BAANA#U0 in the RL78/G14 family datasheet.

Is the R5F104BAANA#U0 pin-compatible with other RL78/G14 variants in 32-pin HWQFN?

Yes, all RL78/G14 32-pin HWQFN variants-including R5F104BAANA#U0, R5F104BCANA#U0, and R5F104BDANA#U0-share identical pin count, pitch (0.5 mm), footprint (5 × 5 mm), and pin function mapping. Differences are limited to flash/RAM capacity and peripheral enablement flags in firmware; no PCB redesign is required when upgrading within this package group. This pin-compatibility is guaranteed by Renesas' package standardization across the R5F104xANA series.

What power modes does the R5F104BAANA#U0 support for ultra-low-power operation?

The R5F104BAANA#U0 supports HALT, STOP, and SNOOZE modes. In STOP mode with only RTC and LVD active, it draws 0.60 μA; in active mode at 32 MHz, it consumes 66 μA/MHz. SNOOZE mode allows selected peripherals (e.g., UART, ADC) to operate while CPU sleeps-enabling event-driven wake-up without continuous polling. These modes are implemented in silicon and verified for the R5F104BAANA#U0 in the RL78/G14 datasheet Section 1.1.