Renesas R5F10378DNA#U0

Overview

R5F10378DNA#U0 from Renesas Electronics is a 24-pin RL78/G12 16-bit microcontroller designed for ultra-low-power embedded control in industrial applications, featuring 8 KB code flash, 512 B RAM, 1.8–5.5 V operation, 24 MHz max CPU speed (31 DMIPS), and -40°C to +85°C temperature range (D-grade).

For engineers reviewing the R5F10378DNA#U0 datasheet, R5F10378DNA#U0 pinout, R5F10378DNA#U0 application, or R5F10378DNA#U0 equivalent, this page delivers verified technical context, package mapping, peripheral configuration, real-world use cases, and validated alternative options - all grounded in Renesas' official R01DS0193EJ0250 Rev.2.50 documentation.

Technical Context

The R5F10378DNA#U0 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). It operates in HS/LS clock modes with selectable 1–24 MHz on-chip oscillator (±5.0% accuracy over -40°C to +85°C).

It integrates an 8-channel 16-bit timer array (TAU0), 10-bit 8-channel A/D converter, single UART channel, one simplified SPI (CSI00), no I²C interface, and lacks DMA, data flash, CRC, RAM guard, or SFR guard - distinguishing it from R5F102-series variants per Renesas' documented functional partitioning.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10378DNA#U0, R5F10278DNA#U0 adds safety and data storage features at higher cost and power, while R5F1037ADNA#U0 offers scalable memory within identical footprint and functionality - enabling seamless upgrade without PCB revision.

Availability

R5F10378DNA#U0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and power supply monitors requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F10378DNA#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, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G12 family, including R5F10378DNA#U0, was engineered for cost-sensitive, ultra-low-power embedded control in industrial equipment where reliability, small footprint, and minimal external components are critical.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F10378DNA#U0?

The R5F10378DNA#U0 achieves a maximum operating frequency of 24 MHz, delivering 31 DMIPS of processing performance. Its RL78 CPU core executes instructions in as little as 0.04167 µs under high-speed on-chip oscillator conditions. This enables deterministic real-time response for motor control loops, sensor fusion, and communication protocol handling - all while maintaining ultra-low power consumption of 63 μA/MHz.

Does the R5F10378DNA#U0 include data flash memory or DMA capability?

No, the R5F10378DNA#U0 does not include data flash memory or DMA controller functionality. Per Renesas' R01DS0193EJ0250 Rev.2.50 documentation, these features are exclusive to the R5F102xx series. The R5F10378DNA#U0 provides 8 KB of code flash and 512 B of RAM only, with no dedicated data flash or DMA channels - simplifying design for applications that do not require field firmware updates or high-bandwidth memory transfers.

What are the supported serial communication interfaces on the R5F10378DNA#U0?

The R5F10378DNA#U0 supports one UART channel (RxD0/TxD0), one simplified SPI interface (CSI00), and no I²C interface - consistent with R5F103xx-series specifications. While pin labels include SDA00 and SCL00, Renesas explicitly states that I²C functionality is not mounted on R5F103 products. The CSI00 interface operates in master-only mode and is compatible with standard SPI peripherals, enabling communication with sensors, displays, or external ADCs.

What is the operating temperature grade and packaging of the R5F10378DNA#U0?

The R5F10378DNA#U0 is rated for industrial operation from –40°C to +85°C (D-grade) and housed in a 24-pin HWQFN package (4 mm × 4 mm, 0.5 mm pitch) with an exposed die pad. The package requires connection of the exposed pad to VSS for thermal dissipation and electrical stability. This combination meets IPC/JEDEC standards for industrial reliability and enables compact, high-density PCB layouts in space-constrained applications.

How does the R5F10378DNA#U0 handle analog inputs and reference voltages?

The R5F10378DNA#U0 integrates a 10-bit A/D converter with 8 input channels (ANI0–ANI3, ANI16–ANI19). It supports internal 1.45 V reference or external references applied to AVREFP (positive) and AVREFM (negative) pins. The analog input voltage range is limited to –0.3 V to VDD + 0.3 V, and must not exceed AVREF(+) + 0.3 V during conversion. This architecture enables accurate measurement of sensor outputs, supply rails, or thermistor networks without external reference ICs in most industrial sensing applications.