Renesas R5F103A8ASP#V0

Overview

R5F103A8ASP#V0 from Renesas Electronics is a 30-pin LSSOP ultra-low-power 16-bit RL78/G12 microcontroller for consumer-grade embedded control, featuring 8 KB code flash, 512 B RAM, 8-channel 10-bit A/D converter, 1-channel UART, and operation from 1.8 V to 5.5 V at –40°C to +85°C. It delivers 31 DMIPS at 24 MHz using its high-accuracy ±5.0% on-chip oscillator and supports HALT/STOP/SNOOZE low-power modes.

For engineers reviewing the R5F103A8ASP#V0 datasheet, R5F103A8ASP#V0 pinout, R5F103A8ASP#V0 application, or R5F103A8ASP#V0 equivalent, key selection criteria include its 30-pin LSSOP package, absence of data flash memory, single UART channel, no DMA or safety functions (CRC/RAM guard), and compatibility with cost-sensitive appliance and sensor node designs requiring stable 1.8–5.5 V operation.

Technical Context

The R5F103A8ASP#V0 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, enabling minimum instruction execution time of 0.04167 µs at 24 MHz. Its clock system integrates a high-speed on-chip oscillator (1–24 MHz, ±5.0% accuracy over –40°C to +85°C) and low-speed 15 kHz on-chip oscillator, with external crystal support up to 20 MHz via X1/X2 pins.

Peripheral integration includes an 8-channel 10-bit A/D converter with internal reference (1.45 V) and temperature sensor, 8-channel 16-bit timer (TAU) with PWM capability, watchdog timer, 12-bit interval timer, and simplified SPI (CSI) and I²C interfaces - all configured through dedicated peripheral I/O redirection registers (PIOR) for flexible pin assignment.

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 R5F103AAASP#V0, the R5F103A8ASP#V0 trades flash/RAM capacity for lower cost and smaller footprint; compared with R5F102A8ASP#V0, it omits data flash and safety features to reduce BOM cost and simplify certification for consumer applications.

Availability

R5F103A8ASP#V0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, smart remote controls, and LED lighting drivers requiring stable component supply across production lifecycles.

Supply support for R5F103A8ASP#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 delivering microcontrollers, analog, power, and SoC products for automotive, industrial, infrastructure, and IoT markets.

The RL78/G12 product line is designed for ultra-low-power general-purpose embedded control in cost-sensitive consumer and industrial applications, emphasizing energy efficiency, integration, and ease of development.

FAQ

What is the maximum operating frequency of the R5F103A8ASP#V0?

The R5F103A8ASP#V0 supports a maximum system clock frequency of 24 MHz using its high-speed on-chip oscillator. At this frequency, it delivers 31 DMIPS performance. External crystal operation is rated up to 20 MHz. The actual achievable frequency depends on VDD voltage: 1–24 MHz at 2.7–5.5 V, 1–16 MHz at 2.4–5.5 V, and 1–8 MHz at 1.8–5.5 V.

Does the R5F103A8ASP#V0 include data flash memory?

No, the R5F103A8ASP#V0 does not include data flash memory. As confirmed in the RL78/G12 datasheet section 1.3.1, R5F103-series devices omit the 2 KB data flash present in R5F102-series parts. This simplifies the memory subsystem and reduces cost for applications that store configuration data externally or in code flash.

What are the key differences between R5F103A8ASP#V0 and R5F102A8ASP#V0?

The R5F103A8ASP#V0 lacks data flash memory, CRC operation, RAM guard, and SFR guard features found in the R5F102A8ASP#V0. Its high-speed on-chip oscillator accuracy is ±5.0% (vs. ±1.0% for R5F102A8ASP#V0), and it does not support DMA. These omissions target cost-sensitive consumer applications where those features are unnecessary.

Which serial interfaces are available on the R5F103A8ASP#V0?

The R5F103A8ASP#V0 provides one UART channel, one simplified SPI (CSI) channel, and zero I²C channels - as specified in RL78/G12 documentation for 30-pin R5F103Ax variants. Unlike R5F102Ax parts, it does not implement simplified I²C or additional UART/CSI channels, limiting it to basic point-to-point or master-only serial communication.

What is the pin count and package type of the R5F103A8ASP#V0?

The R5F103A8ASP#V0 uses a 30-pin plastic LSSOP package with 0.65-mm pitch and 7.62 mm body width, designated by the "SP" suffix and packaged in trays (#V0). This package is RoHS-compliant and optimized for automated assembly in high-volume consumer electronics manufacturing.