Renesas R5F10279ANA#25

Overview

R5F10279ANA#25 from Renesas Electronics is a 24-pin HWQFN-packaged RL78/G12 16-bit microcontroller with 12 KB code flash, 2 KB data flash, 1.5 KB RAM, and ultra-low-power operation (63 μA/MHz). It integrates a 10-bit 11-channel ADC, dual CSI/I²C serial interfaces, UART, 4-channel TAU timer, DMA controller, and operates across 1.8–5.5 V at –40°C to +85°C for consumer-grade embedded control.

For engineers reviewing the R5F10279ANA#25 datasheet, R5F10279ANA#25 pinout, R5F10279ANA#25 application, or R5F10279ANA#25 equivalent, this page delivers verified technical context, package-validated pin functions, real-world use scenarios in battery-powered sensing and industrial HMI, and two confirmed alternative parts with documented functional differences.

Technical Context

The R5F10279ANA#25 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.04167 µs (@24 MHz high-speed on-chip oscillator) to 1 µs (@1 MHz), and features a 1 MB address space with four banks of 8-bit general-purpose registers. Its memory subsystem includes 12 KB code flash (1 KB block size), 2 KB data flash with background operation (BGO), and 1.5 KB on-chip RAM.

Peripheral integration includes two CSI channels (SPI-compatible), two simplified I²C channels, one UART channel, four 16-bit timer channels, a 12-bit interval timer, window watchdog timer, CRC calculation unit, and key interrupt support - all enabled under HS mode with high-speed on-chip oscillator accuracy of ±1.0% over –20°C to +85°C.

Key Specifications

Pinout & Package

Package: 24-pin HWQFN (4 × 4 mm, 0.5-mm pitch), exposed die pad (to be connected to VSS), compliant with PWQN0024KE-A and PWQN0024KF-A mechanical outlines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10279ANA#25, R5F10278ANA#25 reduces code and RAM capacity but retains identical low-power features and data flash, while R5F10379ANA#25 removes data flash, DMA, CRC, and tight oscillator tolerance-making it appropriate only for simpler, less demanding applications.

Availability

R5F10279ANA#25 is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial HMI panels, white goods motor controllers, and energy meter data loggers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for R5F10279ANA#25 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 Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with over 40 years of microcontroller innovation.

The RL78/G12 product line targets cost-sensitive, ultra-low-power general-purpose applications-including battery-operated sensors, appliance controls, and industrial HMIs-by balancing performance, integration, and energy efficiency in compact packages.

FAQ

What is the maximum operating frequency of the R5F10279ANA#25?

The R5F10279ANA#25 supports a maximum high-speed on-chip oscillator frequency of 24 MHz, delivering 31 DMIPS performance. When using an external crystal (X1/X2), the maximum main system clock frequency is 20 MHz at VDD ≥ 2.7 V or 16 MHz at VDD ≥ 2.4 V. The minimum instruction execution time is 0.04167 µs at 24 MHz operation, confirmed in the R01DS0193EJ0250 datasheet Rev. 2.50.

Does the R5F10279ANA#25 include data flash memory, and what is its endurance?

Yes, the R5F10279ANA#25 includes 2 KB of on-chip data flash memory with background operation (BGO) support. Its rated endurance is 1,000,000 write/erase cycles (typical), and it operates across the full VDD range of 1.8 V to 5.5 V. This enables reliable non-volatile storage of calibration data, configuration parameters, or firmware update staging without halting application execution.

What are the key low-power modes supported by the R5F10279ANA#25?

The R5F10279ANA#25 supports HALT, STOP, and SNOOZE modes. HALT stops the CPU while keeping peripherals active; STOP disables both CPU and most peripherals, drawing <0.23 µA typical; SNOOZE allows selected peripherals (e.g., UART, ADC) to operate while CPU remains halted. All modes retain RAM content and support wake-up via interrupts, timers, or key return inputs-critical for battery longevity in portable designs.

Can the R5F10279ANA#25 interface directly with 1.8 V and 3.3 V peripherals?

Yes, the R5F10279ANA#25 supports true multi-voltage I/O operation from 1.8 V to 5.5 V. Its port pins can be configured with TTL input buffers and on-chip pull-up resistors, and specific pins (e.g., P60/P61) tolerate up to 6 V. This eliminates external level shifters when interfacing with 1.8 V sensors, 3.3 V BLE modules, or 5 V actuators-reducing BOM cost and board area.

How many serial communication interfaces does the R5F10279ANA#25 provide?

The R5F10279ANA#25 provides three serial interface types: two Simplified SPI (CSI) channels, two Simplified I²C channels, and one UART channel. These are implemented via shared pins (e.g., P10–P12, P41–P42) with flexible assignment through the Peripheral I/O Redirection Register (PIOR), enabling concurrent use of multiple protocols without pin conflict in space-constrained 24-pin HWQFN layouts.