Renesas R5F121BAANA#60

Overview

R5F121BAANA#60 from Renesas Electronics is a 32-pin, 16-bit RL78/G16 microcontroller with 16 KB code flash memory, 2 KB RAM, and industrial-grade operation up to +125°C. It integrates an 8/10-bit ADC (11-channel), capacitive touch sensing unit (15-channel), real-time clock with calendar, and low-power HALT/STOP modes - deployed in smart appliance control panels requiring robust HMI and sensor fusion.

For engineers reviewing the R5F121BAANA#60 datasheet, R5F121BAANA#60 pinout, R5F121BAANA#60 application, or R5F121BAANA#60 equivalent, this page delivers verified package mapping (32-pin HWQFN, 5 × 5 mm, 0.5-mm pitch), confirmed peripheral allocation (3× UART, 3× simplified SPI, 3× simplified I²C), and validated alternative selection guidance for industrial embedded designs.

Technical Context

The R5F121BAANA#60 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, supporting instruction execution times from 0.0625 μs (@16 MHz high-speed on-chip oscillator) to 30.5 μs (@32.768 kHz subsystem clock). Its memory subsystem includes 16 KB code flash (1 KB block size), 1 KB data flash (512 B block, 1M rewrite cycles), and 2 KB SRAM.

Peripherals include eight 16-bit timers, one 12-bit interval timer, one watchdog timer, one real-time clock (99-year calendar), one 8/10-bit ADC (up to 11 analog inputs), two comparators, and a dedicated 15-channel capacitive touch sensing unit (CTSU) supporting self- and mutual-capacitance configurations - all operating from a single 2.4–5.5 V supply.

Key Specifications

Pinout & Package

Package: 32-pin HWQFN (5.0 × 5.0 mm, 0.5-mm pitch) with exposed die pad - requires soldering to a non-electrical PCB thermal pad for thermal management and EMI reduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F121BAANA#60, R5F121BCANA#60 offers double flash capacity with zero hardware changes, while R5F121BAMFP#70 trades compactness for assembly flexibility - both retain identical peripheral sets, timing behavior, and industrial temperature compliance.

Availability

R5F121BAANA#60 is available at Aetrix Electronics and suitable for industrial motor drives, smart appliance control panels, and programmable power supply monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F121BAANA#60 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/G16 product line delivers true low-power performance (61 μA/MHz) with integrated HMI features - designed specifically for cost-sensitive, thermally demanding industrial and consumer control applications.

FAQ

What is the maximum operating frequency and oscillator accuracy of the R5F121BAANA#60?

The R5F121BAANA#60 supports a high-speed on-chip oscillator selectable from 16 MHz, 8 MHz, 4 MHz, 2 MHz, or 1 MHz. At 16 MHz operation with VDD = 2.4–5.5 V and TA = −40°C to +125°C (M-grade), frequency accuracy is ±1.5%. This eliminates external crystals in many industrial applications while maintaining timing integrity.

Does the R5F121BAANA#60 support background data flash rewriting while executing code from main flash?

No. The R5F121BAANA#60 does not support Background Operation (BGO) for data flash. During data flash rewriting, instruction execution from code flash memory is halted. This requires careful firmware sequencing - typically using STOP mode or HALT mode during write operations to avoid bus conflicts and ensure data integrity.

How many capacitive touch channels does the R5F121BAANA#60 support, and what configuration options exist?

The R5F121BAANA#60 integrates a dedicated Capacitive Touch Sensing Unit (CTSU) with 15 physical channels. It supports self-capacitance mode (one key per pin, up to 15 keys) and mutual-capacitance matrix mode (transmit/receive pin pairing from the same 15 pins, enabling up to 16 keys). Both modes operate without external components.

What is the ADC resolution, input count, and reference voltage capability of the R5F121BAANA#60?

The R5F121BAANA#60 features an 8/10-bit successive-approximation ADC with up to 11 analog input channels (ANI0–ANI10). It supports internal reference voltage (0.815 V typical), external reference, temperature sensor, and touch voltage (TSCAP) as selectable references - enabling calibrated sensing across voltage, thermal, and HMI domains within a single device.

Is the R5F121BAANA#60 pin-compatible with other RL78/G16 variants in the same package?

Yes. The R5F121BAANA#60 shares identical pinout and electrical characteristics with all other 32-pin HWQFN RL78/G16 devices (e.g., R5F121BCANA#60, R5F121BAGNA#60), including identical function mapping per pin. Memory size (16 KB vs. 32 KB) and temperature grade (M vs. G/A) differ, but PCB layout and firmware initialization remain fully compatible across the NA-package family.