Renesas R5F10279ANA#U0

Overview

R5F10279ANA#U0 from Renesas Electronics is a 24-pin HWQFN-packaged 16-bit RL78/G12 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/SPI interfaces, UART, I²C, 4-channel 16-bit TAU timer, and operates from 1.8 V to 5.5 V across –40°C to +85°C for consumer-grade embedded control in battery-powered sensors and smart peripherals.

For engineers reviewing the R5F10279ANA#U0 datasheet, R5F10279ANA#U0 pinout, R5F10279ANA#U0 application, or R5F10279ANA#U0 equivalent, this page delivers verified technical context, exact package mapping (HWQFN-24, 4 × 4 mm, 0.5-mm pitch), confirmed peripheral counts (2 CSI, 2 simplified I²C, 1 UART), real-time power modes (HALT/STOP/SNOOZE), and validated alternative part selection guidance.

Technical Context

The R5F10279ANA#U0 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, delivering 31 DMIPS at 24 MHz using its high-accuracy ±1.0% on-chip oscillator (1–24 MHz selectable). Its memory subsystem includes 12 KB code flash (1 KB block size), 2 KB data flash supporting background operation (BGO) and 1M rewrite cycles, and 1.5 KB on-chip RAM.

Peripheral integration centers on low-power mixed-signal control: 11-channel 10-bit ADC with internal 1.45 V reference and temperature sensor; 4-channel 16-bit timer (TAU0) with PWM capability; 2-channel DMA; CRC engine; and safety features including RAM/SFR guard. All operate within the 1.8–5.5 V supply range and –40°C to +85°C ambient.

Key Specifications

Pinout & Package

Package: HWQFN-24, 4 × 4 mm body, 0.5-mm pitch, exposed die pad (to be connected to VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10279ANA#U0, R5F10278ANA#U0 offers identical low-power operation and peripheral set at reduced flash/RAM-ideal for stable, compact firmware-while R5F10379ANA#U0 sacrifices data flash, safety guards, and oscillator accuracy to lower unit cost, making it suitable only for static, non-upgradable control tasks.

Availability

R5F10279ANA#U0 is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial remote I/O modules, portable medical monitors, and white goods control panels requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for R5F10279ANA#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 Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets.

The RL78/G12 product line delivers true low-power 16-bit MCU performance for cost-sensitive, battery-operated, and general-purpose embedded control applications requiring integrated analog, communication, and safety features.

FAQ

What is the maximum operating frequency and instruction throughput of the R5F10279ANA#U0?

The R5F10279ANA#U0 achieves a maximum system clock of 24 MHz using its high-accuracy on-chip oscillator, delivering 31 DMIPS of processing throughput. Its RL78 CPU core executes instructions in as little as 0.04167 µs at 24 MHz, enabling responsive real-time control in resource-constrained applications without external clock sources.

Does the R5F10279ANA#U0 include data flash memory, and what are its key characteristics?

Yes, the R5F10279ANA#U0 includes 2 KB of data flash memory. It supports background operation (BGO), allowing program execution from code flash while rewriting data flash. Rated for 1,000,000 rewrite cycles at VDD = 1.8–5.5 V, it enables reliable field-updatable parameter storage without external EEPROM-critical for calibration, usage logs, or configuration persistence in the R5F10279ANA#U0.

What are the supported low-power modes on the R5F10279ANA#U0, and how do they impact current draw?

The R5F10279ANA#U0 supports HALT, STOP, and SNOOZE modes. In HALT mode, CPU stops but peripherals remain active; STOP mode disables all clocks except LSI; SNOOZE enables selective peripheral operation during low-power sleep. Its benchmarked 63 μA/MHz active current drops to sub-μA levels in STOP, extending battery life significantly-verified across –40°C to +85°C for the R5F10279ANA#U0.

Can the R5F10279ANA#U0 operate from a single 1.8 V supply, and what analog features remain functional at that voltage?

Yes, the R5F10279ANA#U0 operates across 1.8 V to 5.5 V. At 1.8 V, its 10-bit 11-channel ADC remains fully functional with internal 1.45 V reference and integrated temperature sensor. Analog inputs ANI0–ANI3 and ANI16–ANI22 retain specified accuracy, and the high-speed on-chip oscillator maintains ±1.0% accuracy-ensuring consistent mixed-signal performance across the full voltage range of the R5F10279ANA#U0.

What safety and reliability features are integrated into the R5F10279ANA#U0 for industrial use?

The R5F10279ANA#U0 integrates CRC calculation hardware, RAM guard, and SFR guard to detect memory corruption and unauthorized register access-features explicitly documented for R5F102-series devices. Combined with its –40°C to +85°C operating range, 1.8–5.5 V supply tolerance, and voltage detector with 12-level reset/interrupt selection, these capabilities support robust operation in demanding industrial environments for the R5F10279ANA#U0.