Renesas R5F10379DNA#U0

Overview

R5F10379DNA#U0 from Renesas Electronics is a 24-pin RL78/G12 16-bit microcontroller designed for ultra-low-power embedded control in industrial applications. It operates from 1.8 V to 5.5 V, delivers 31 DMIPS at 24 MHz, integrates 12 KB code flash and 768 B RAM, and supports -40°C to +85°C ambient operation (D-grade). It serves as the main system controller in battery-powered sensors and smart actuators requiring deterministic timing and low active current.

For engineers reviewing the R5F10379DNA#U0 datasheet, R5F10379DNA#U0 pinout, R5F10379DNA#U0 application, or R5F10379DNA#U0 equivalent, this page provides verified technical context, package-validated pin functions, real-world use scenarios, and two confirmed alternative parts with documented functional trade-offs - all aligned to the RL78/G12 Rev.2.50 specification.

Technical Context

The R5F10379DNA#U0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, 1 MB address space, and configurable instruction execution time (0.04167 µs at 24 MHz). It uses a high-speed on-chip oscillator (±5.0% accuracy from -40°C to +85°C) and includes a 15 kHz low-speed on-chip oscillator for watchdog and interval timing.

It features a 10-bit A/D converter with 8 input channels, four 16-bit timer channels (TAU0), one 12-bit interval timer, one window watchdog timer, and a single UART channel. Unlike R5F102 variants, it omits data flash memory, DMA, CRC, and simplified I²C - confirming its role as a cost-optimized, low-peripheral-count variant for deterministic control tasks.

Key Specifications

Pinout & Package

Package: HWQFN-24 (4 × 4 mm, 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 R5F10379DNA#U0, R5F1037ADNA#U0 offers headroom for future feature expansion, while R5F10279DNA#U0 adds data integrity and timing precision at the cost of higher unit price and marginally increased power in active mode.

Availability

R5F10379DNA#U0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC actuators, programmable power monitors, and embedded keypad interfaces requiring stable component supply across multi-year production cycles.

Supply support for R5F10379DNA#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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G12 product line targets cost-sensitive, ultra-low-power general-purpose embedded control applications - emphasizing energy efficiency, integrated analog peripherals, and robust industrial qualification without sacrificing code density or real-time determinism.

FAQ

What is the maximum operating frequency of the R5F10379DNA#U0?

The R5F10379DNA#U0 supports a maximum operating frequency of 24 MHz using its high-speed on-chip oscillator. This yields 31 DMIPS performance and enables real-time execution of control algorithms in applications such as motor drives and sensor fusion. The oscillator accuracy is ±5.0% over the full -40°C to +85°C industrial temperature range, as specified in the RL78/G12 datasheet Rev.2.50.

Does the R5F10379DNA#U0 include data flash memory?

No, the R5F10379DNA#U0 does not include data flash memory. As confirmed in Section 1.3.1 of the RL78/G12 datasheet, R5F103 products (including R5F10379DNA#U0) omit the 2 KB data flash present in R5F102 variants. This simplifies the memory subsystem and reduces cost for applications that store configuration or logs externally or in code flash with wear-leveling software.

What package type and pin count does the R5F10379DNA#U0 use?

The R5F10379DNA#U0 uses a 24-pin HWQFN package (4 × 4 mm, 0.5 mm pitch) with an exposed die pad. This is explicitly defined in Figure 1-1 and Table 1-1 of the RL78/G12 datasheet, where "7" in the part number denotes 24-pin configuration and "NA" indicates HWQFN packaging. The #U0 suffix confirms tray packaging per Renesas' ordering conventions.

Which serial interfaces are supported on the R5F10379DNA#U0?

The R5F10379DNA#U0 supports one UART channel (RxD0/TxD0), one simplified SPI (CSI00), and no simplified I²C - as confirmed in Table 1-1 and Section 1.3.3 of the RL78/G12 datasheet. Unlike R5F1027x parts, R5F1037x devices omit the second CSI channel and all simplified I²C functionality, making UART+CSI the only on-chip serial options.

What is the A/D converter resolution and channel count for the R5F10379DNA#U0?

The R5F10379DNA#U0 integrates an 8-channel, 10-bit successive-approximation A/D converter with internal 1.45 V reference voltage and on-die temperature sensor. This is specified in Section 1.1 Features and confirmed in Table 1-1 of the RL78/G12 datasheet, where R5F1037x devices list "8" under A/D channels - distinct from the 11-channel capability of 20-pin R5F1026x and R5F1036x variants.