Renesas R5F103A9DSP#V0

Overview

R5F103A9DSP#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 8 KB code flash, 768 B RAM, 10-bit 8-channel ADC, UART, CSI, and TAU timer with 8 channels - enabling compact sensor interface and motor control in battery-powered appliances.

For engineers reviewing the R5F103A9DSP#V0 datasheet, R5F103A9DSP#V0 pinout, R5F103A9DSP#V0 application, or R5F103A9DSP#V0 equivalent, key selection criteria include its 1.8–5.5 V operation, absence of data flash memory, 5.0% high-speed on-chip oscillator accuracy, and lack of DMA or safety features compared to R5F102 variants.

Technical Context

The R5F103A9DSP#V0 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, delivering 31 DMIPS at 24 MHz. Its clock system supports high-speed on-chip oscillator (1–24 MHz) with ±5.0% accuracy over –40°C to +85°C and external crystal input (1–20 MHz).

It provides 26 I/O pins including 9 N-ch open-drain I/Os (VDD-tolerant), programmable key interrupt, and peripheral I/O redirection via PIOR register. Unlike R5F102 series, it omits data flash, DMA, CRC, RAM/SFR guard, and simplified I²C - confirming its role as a cost-optimized, low-feature variant within the RL78/G12 family.

Key Specifications

Pinout & Package

Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), JEDEC standard PLSP0030JB-B footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F102A9DSP#V0, the R5F103A9DSP#V0 trades data flash and safety features for lower cost and reduced power; versus R5F103AAASP#V0, it offers identical pinout with less memory and ADC channels - optimizing BOM cost for volume production.

Availability

R5F103A9DSP#V0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, white goods motor control, and consumer IoT hubs requiring stable component supply across long product lifecycles.

Supply support for R5F103A9DSP#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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power management ICs for automotive, industrial, and consumer markets.

The RL78/G12 product line delivers true low-power 16-bit MCU performance for cost-sensitive general-purpose applications, emphasizing energy efficiency, integrated peripherals, and rapid time-to-market for embedded control systems.

FAQ

What is the maximum operating frequency of the R5F103A9DSP#V0?

The R5F103A9DSP#V0 supports up to 24 MHz operation using its high-speed on-chip oscillator. At this frequency, it delivers 31 DMIPS performance with a minimum instruction execution time of 0.04167 µs. External crystal operation is rated up to 20 MHz. The device maintains full functionality across its 1.8–5.5 V supply range at these speeds.

Does the R5F103A9DSP#V0 include data flash memory?

No, the R5F103A9DSP#V0 does not include data flash memory. This is a defining distinction from the R5F102 series. All R5F103 products - including R5F103A9DSP#V0 - omit the 2 KB data flash found in R5F102 variants, making them suitable for applications where parameter storage is handled externally or via code flash emulation.

What package type and pin count does the R5F103A9DSP#V0 use?

The R5F103A9DSP#V0 uses a 30-pin plastic LSSOP package with 0.65-mm pitch and JEDEC-standard footprint PLSP0030JB-B. Its 30-pin configuration provides 26 usable I/O lines, including dedicated analog inputs, UART, CSI, and timer resources - optimized for compact, high-integration embedded designs.

What are the key differences between R5F103A9DSP#V0 and R5F102A9DSP#V0?

The R5F103A9DSP#V0 lacks data flash memory, DMA controller, CRC calculation unit, and RAM/SFR guard features present in R5F102A9DSP#V0. Its high-speed on-chip oscillator has ±5.0% accuracy (vs. ±1.0% in R5F102), and it omits simplified I²C support. These omissions reduce cost and power while targeting less demanding applications.

Can the R5F103A9DSP#V0 operate from a 1.8 V supply?

Yes, the R5F103A9DSP#V0 is fully specified to operate from 1.8 V to 5.5 V. At 1.8 V, it supports low-speed main mode (up to 8 MHz) and maintains all core functions including 10-bit ADC, UART, and TAU timers. This enables direct integration with energy-harvesting sources and single-cell Li-ion or alkaline battery systems.