Renesas R5F103A7DSP#V0

Overview

R5F103A7DSP#V0 from Renesas Electronics is a 30-pin LSSOP packaged RL78/G12 16-bit microcontroller designed for ultra-low-power embedded control in consumer-grade applications (–40°C to +85°C). It integrates 2 KB code flash, 256 B RAM, 10-bit 8-channel ADC, single UART, one simplified SPI (CSI), and operates from 1.8 V to 5.5 V with true low-power consumption (63 μA/MHz). It is used in battery-powered sensor nodes and smart home peripherals requiring deterministic real-time response.

For engineers reviewing the R5F103A7DSP#V0 datasheet, R5F103A7DSP#V0 pinout, R5F103A7DSP#V0 application, or R5F103A7DSP#V0 equivalent, key selection criteria include its 30-pin LSSOP package, absence of data flash memory, limited serial interface count (1 UART, 1 CSI, no I²C), lack of DMA, and suitability for cost-sensitive, low-complexity control tasks where full RL78/G12 peripheral feature set is not required.

Technical Context

The R5F103A7DSP#V0 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, supporting minimum instruction execution time of 0.04167 µs at 24 MHz using the high-speed on-chip oscillator. Its clock system includes selectable high-speed on-chip oscillator frequencies (1–24 MHz) with ±5.0% accuracy over –40°C to +85°C and a dedicated 15 kHz low-speed on-chip oscillator for watchdog and interval timing.

It features an 8-channel 10-bit A/D converter with internal reference voltage (1.45 V) and temperature sensor, four 16-bit timer channels (TAU0), one 12-bit interval timer, and one window watchdog timer. The device lacks data flash memory, DMA controller, CRC unit, RAM guard, and SFR guard-features present in the R5F102 series but omitted in the R5F103 family per official documentation.

Key Specifications

Pinout & Package

Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), RoHS-compliant, tray packaging (#V0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F102A7DSP#V0, the R5F103A7DSP#V0 trades data flash, DMA, and tighter oscillator tolerance for lower cost and reduced feature set; compared with R5F103AAASP#V0, it offers identical peripheral count but significantly less memory-making it optimal for minimal-footprint, fixed-function control tasks.

Availability

R5F103A7DSP#V0 is available at Aetrix Electronics and suitable for smart thermostat interfaces, wireless sensor nodes, appliance control panels, and industrial panel meter front-ends requiring stable component supply across production lifecycles.

Supply support for R5F103A7DSP#V0 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 Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G12 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and general-purpose embedded control applications requiring high integration and long-term reliability.

FAQ

What is the maximum operating frequency of the R5F103A7DSP#V0?

The R5F103A7DSP#V0 supports a maximum system clock frequency of 24 MHz using its high-speed on-chip oscillator. When driven by an external crystal, the maximum main system clock is 20 MHz (1.8–5.5 V operation). Instruction execution time is as fast as 0.04167 µs at 24 MHz, enabling responsive real-time control in the R5F103A7DSP#V0.

Does the R5F103A7DSP#V0 include data flash memory?

No, the R5F103A7DSP#V0 does not include data flash memory. Per Renesas documentation, all R5F103-series devices omit the 2 KB data flash present in the R5F102 series. This means the R5F103A7DSP#V0 cannot perform background data logging or field-upgradable parameter storage without external EEPROM or FRAM. Code flash remains available for program storage only.

What serial communication interfaces are supported by the R5F103A7DSP#V0?

The R5F103A7DSP#V0 supports exactly one UART channel, one simplified SPI (CSI) channel, and zero I²C channels. Although some pin labels (e.g., SDA00, SCL00) appear in the pinout, the I²C functionality is explicitly disabled in the R5F103 family. This makes the R5F103A7DSP#V0 suitable for point-to-point UART links or simple SPI sensor interfaces-but not for multi-drop I²C bus systems.

What is the operating temperature range for the R5F103A7DSP#V0?

As indicated by the "A" suffix in its part number, the R5F103A7DSP#V0 is rated for consumer applications with an operating ambient temperature range of –40°C to +85°C. It is not qualified for extended industrial temperatures (–40°C to +105°C), which require "G"-suffixed variants. This rating aligns with typical indoor electronic equipment environments.

Is the R5F103A7DSP#V0 pin-compatible with other RL78/G12 devices in the same package?

The R5F103A7DSP#V0 shares the same 30-pin LSSOP package and pinout configuration with other R5F103Ax and R5F102Ax devices (e.g., R5F103AAASP#V0, R5F102A7DSP#V0), but functional pin assignments differ due to peripheral enablement. For example, pins designated for I²C or DMA in R5F102 devices are repurposed or unused in the R5F103A7DSP#V0. Therefore, while physical pinout matches, firmware and schematic design must account for missing peripherals in the R5F103A7DSP#V0.