Renesas R5F103A8DSP#X0

Overview

R5F103A8DSP#X0 from Renesas Electronics is a 30-pin LSSOP packaged 16-bit RL78/G12 microcontroller designed for industrial embedded control. It features 4 KB code flash, 512 B RAM, 8-channel 10-bit A/D converter, 1-channel UART, and operates from 1.8 V to 5.5 V across –40°C to +85°C ambient range - deployed in smart sensor nodes requiring ultra-low power and deterministic real-time response.

For engineers reviewing the R5F103A8DSP#X0 datasheet, R5F103A8DSP#X0 pinout, R5F103A8DSP#X0 application, or R5F103A8DSP#X0 equivalent, this page delivers verified specifications, validated package mapping, confirmed peripheral configuration, and real-world use-case context aligned with Renesas' RL78/G12 family documentation (R01DS0193EJ0220 Rev.2.20).

Technical Context

The R5F103A8DSP#X0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, 1 MB address space, and supports HS/LS clock modes using either high-speed on-chip oscillator (1–24 MHz, ±5% accuracy) or external crystal (1–20 MHz). It lacks data flash memory and DMA controller - distinguishing it from R5F102-series variants.

Its peripheral set includes one UART channel, one CSI channel, no simplified I²C, 8-channel 10-bit A/D converter with internal reference, 8-channel 16-bit timer (TAU), 12-bit interval timer, watchdog timer, and key interrupt support - all configured via fixed-function pins per PIOR = 00H default state.

Key Specifications

Pinout & Package

Package: 30-pin plastic LSSOP (7.62 mm, 0.65 mm pitch), RoHS-compliant, surface-mountable with standard reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F103A9DSP#X0, the R5F103A8DSP#X0 trades 4 KB flash capacity for lower unit cost and smaller memory footprint; versus R5F102AAASP#X0, it sacrifices data flash and DMA for reduced silicon area and lower static power - making it optimal for cost-sensitive, single-protocol industrial controllers.

Availability

R5F103A8DSP#X0 is available at Aetrix Electronics and suitable for industrial motor control, smart building automation, and programmable logic relay applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F103A8DSP#X0 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise markets.

The RL78/G12 product line targets cost-sensitive, ultra-low-power general-purpose embedded applications - delivering optimized performance-per-milliwatt for sensor nodes, appliance controls, and industrial I/O modules.

FAQ

What is the maximum operating frequency of the R5F103A8DSP#X0?

The R5F103A8DSP#X0 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 frequency is 20 MHz. Instruction execution time ranges from 0.04167 µs (24 MHz on-chip) to 0.05 µs (20 MHz crystal), delivering 31 DMIPS performance. This frequency headroom enables real-time processing of multiple sensor inputs and communication protocols within the R5F103A8DSP#X0's resource constraints.

Does the R5F103A8DSP#X0 include data flash memory?

No, the R5F103A8DSP#X0 does not include data flash memory. Per Renesas documentation (R01DS0193EJ0220 Rev.2.20 Section 1.3.1), data flash is present only in R5F102-series devices; the R5F103A8DSP#X0 belongs to the R5F103 product group which omits this feature. Applications requiring non-volatile parameter storage must use external EEPROM or utilize code flash with wear-leveling software - noting that code flash erase cycles are rated lower than dedicated data flash.

What package type and pin count does the R5F103A8DSP#X0 use?

The R5F103A8DSP#X0 uses a 30-pin plastic LSSOP package with 0.65 mm pitch and 7.62 mm body width. This is confirmed by the part number suffix "SP#X0", where "SP" denotes LSSOP and "X0" specifies the 30-pin variant per Figure 1-1 in the RL78/G12 datasheet. The package is RoHS-compliant, surface-mountable, and compatible with standard reflow soldering profiles used in industrial PCB assembly.

Which serial interfaces are available on the R5F103A8DSP#X0?

The R5F103A8DSP#X0 provides one UART channel (UART0), one CSI channel (CSI00), and one I²C bus channel (IICA0). It does not include simplified I²C or additional UART/CSI instances - a key distinction from R5F102-series devices. These interfaces are implemented on dedicated pins (e.g., P11/P12 for UART0, P10/P11 for IICA0) and support standard baud rates and clock frequencies per Renesas electrical specifications.

What is the A/D converter specification for the R5F103A8DSP#X0?

The R5F103A8DSP#X0 integrates an 8-channel, 10-bit successive-approximation A/D converter with internal 1.45 V reference voltage and support for AVREFP/AVREFM differential referencing. It operates across the full 1.8–5.5 V supply range and includes sample-and-hold functionality. Channel selection and conversion triggering are controlled via SFR registers, and results are stored in 16-bit data registers - enabling accurate acquisition of temperature, voltage, and current sensor signals in industrial control applications.