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HomeProductsIntegrated Circuits (ICs)Embedded - MicrocontrollersR5F109AAJSP#V0
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R5F109AAJSP#V0 - Renesas Electronics America Inc

Manufacturer Part Number
R5F109AAJSP#V0
Manufacturer
Renesas Electronics Corporation
Allelco Part Number
32D-R5F109AAJSP#V0
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
11,830 pcs available, New & Original
Parts Description
IC MCU 16BIT 16KB FLASH 30LSSOP
Package
30-LSSOP
Data sheet
R5F109AAJSP#V0.pdf

PCN Packaging

2.73KHz.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 11830
  • Unit Price: $103.88
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $103.88 $103.88
200+ $40.20 $8,040.00
500+ $38.79 $19,395.00
1000+ $38.09 $38,090.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

R5F109AAJSP#V0 Tech Specifications
Renesas Electronics America Inc - R5F109AAJSP#V0 technical specifications, attributes, parameters and parts with similar specifications to Renesas Electronics America Inc - R5F109AAJSP#V0

Product Attribute Attribute Value
Manufacturer Renesas Electronics Corporation
Voltage - Supply (Vcc/Vdd) 1.6V ~ 5.5V
Supplier Device Package 30-LSSOP
Speed 32MHz
Series Automotive, AEC-Q100, RL78/F12
RAM Size 1K x 8
Program Memory Type FLASH
Program Memory Size 16KB (16K x 8)
Peripherals DMA, LVD, POR, PWM, WDT
Package / Case 30-LSSOP (0.240', 6.10mm Width)
Package Tray
Product Attribute Attribute Value
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Number of I/O 21
Mounting Type Surface Mount
EEPROM Size 4K x 8
Data Converters A/D 8x8/10b
Core Size 16-Bit
Core Processor RL78
Connectivity CSI, I²C, LINbus, UART/USART
Base Product Number R5F109

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN 3A991A2
HTSUS 8542.31.0001

Parts Introduction

R5F109AAJSP#V0 Image
R5F109AAJSP#V0 (1)

Manufacturer Part Number

R5F109AAJSP#V0

Manufacturer

Renesas Electronics America

Introduction

The R5F109AAJSP#V0 is a high-performance, low-power 16-bit microcontroller (MCU) from Renesas Electronics America. It is part of the RL78/F12 series and is designed for a wide range of embedded applications, including automotive, industrial, and consumer electronics.

Product Features and Performance

32 MHz RL78 core for efficient performance

16KB of Flash program memory and 1KB of RAM

Integrated peripherals including DMA, LVD, POR, PWM, and WDT

21 GPIO pins for flexible connectivity

8-channel 8/10-bit ADC for analog signal processing

Integrated LIN, I2C, UART/USART communication interfaces

Operating voltage range of 1.6V to 5.5V

Extended temperature range of -40°C to 85°C

Product Advantages

Compact 30-LSSOP package for space-constrained designs

Automotive-grade qualification (AEC-Q100) for reliable operation

Low-power modes for energy-efficient operation

Robust peripherals and communication interfaces for versatile applications

Key Reasons to Choose This Product

Proven RL78 core architecture for reliable and efficient performance

Comprehensive peripheral set for diverse embedded applications

Automotive-grade quality and reliability

Flexible power supply and temperature range for wide-ranging use cases

Quality and Safety Features

AEC-Q100 qualification for automotive-grade reliability

Integrated power-on reset (POR) and low-voltage detection (LVD) for safe operation

Compatibility

The R5F109AAJSP#V0 is compatible with the RL78/F12 series and can be used in a variety of embedded applications.

Application Areas

Automotive electronics

Industrial control systems

Home appliances and consumer electronics

Robotics and automation

Product Lifecycle

The R5F109AAJSP#V0 is discontinued at DiGi-Electronics. However, there are equivalent and alternative RL78/F12 series models available from Renesas Electronics America. Customers are advised to contact our website's sales team for more information on the available options and product support.

Frequently Asked Questions(FAQ)

What are the key differences between the R5F109AAJSP#V0 and a standard RL78/F12 microcontroller when considering automotive-grade reliability?
The R5F109AAJSP#V0 stands out from general-purpose RL78/F12 variants due to its AEC-Q100 qualification and automotive grade designation. This ensures it meets stringent reliability standards for temperature cycling, humidity resistance, and long-term operational stability under harsh conditions. While other RL78/F12 devices may operate in industrial ranges up to 85°C, the #V0 variant is tested and guaranteed across -40°C to 85°C with full functional coverage. Additionally, its production traceability and quality control align with automotive supply chain requirements, making it suitable for body electronics, lighting control, or sensor interfaces where failure risk must be minimized.
How does the power consumption of the R5F109AAJSP#V0 compare to higher-end RL78 microcontrollers, and what trade-offs exist for embedded battery-powered applications?
The R5F109AAJSP#V0 consumes approximately 12 µA/MHz in active mode and can drop below 0.5 µA in deep sleep when powered at 1.6V. Compared to RL78/G13 or G14 series parts offering similar flash sizes but at lower voltages (down to 1.8V), the F12’s extended supply range down to 1.6V provides flexibility but slightly higher leakage current at low voltages. For battery-operated systems like wireless sensors or remote controls, this means longer life only if the application spends significant time in ultra-low-power modes. However, the 16KB flash and 1KB RAM limit code density, potentially increasing execution cycles and active time—thus offsetting some energy savings unless optimized carefully.
Can the R5F109AAJSP#V0 interface directly with legacy LINbus networks, and what design considerations apply?
Yes, the R5F109AAJSP#V0 includes native LINbus support via its UART peripheral, enabling direct communication with LIN transceivers without additional logic. When interfacing with a LIN transceiver such as the TJA1020 or similar, ensure proper termination (10 kΩ pull-up to Vcc) and voltage matching since LIN operates at 5V logic levels while the MCU core runs at 1.6–5.5V. If operating below 3.3V, level shifting may be required on the LIN line. Also, verify interrupt latency during LIN wake-up sequences, as the internal oscillator startup time affects response to wake-up frames—this can impact compliance with LIN timing specifications in safety-critical nodes.
Is the 16KB flash memory sufficient for implementing over-the-air (OTA) firmware updates in automotive infotainment subsystems using the R5F109AAJSP#V0?
The 16KB flash limits the R5F109AAJSP#V0 to non-complex firmware stacks, typically reserved for gateway modules or edge controllers handling simple data aggregation rather than full infotainment processing. OTA updates require robust bootloaders, versioning, rollback mechanisms, and secure storage—all consuming several kilobytes just for metadata and validation routines. With only 16KB available, there's little room left for actual application logic beyond basic CAN/LIN forwarding or diagnostic tasks. Thus, this MCU is better suited for peripheral management nodes rather than primary OTA endpoints.
How should decoupling capacitors be placed for optimal noise immunity when using the R5F109AAJSP#V0 in noisy automotive environments?
Place a 100 nF ceramic capacitor as close as possible to each Vcc pin, preferably within 5 mm, using short traces to minimize loop inductance. Additionally, include a bulk 10 µF tantalum or polymer capacitor near the power entry point to handle transient loads from PWM peripherals or ADC sampling bursts. Given the wide supply range (1.6–5.5V), ensure capacitors are rated above the maximum system voltage and have low ESL/ESR. Avoid placing decoupling caps near high-speed signals like CSI clock lines to prevent coupling noise into sensitive analog inputs such as those used by the integrated 8-channel ADC.
What limitations exist in the R5F109AAJSP#V0’s DMA capabilities compared to more advanced RL78 derivatives?
The R5F109AAJSP#V0 supports only basic DMA transfers between memory and peripheral registers, with a single channel limited to specific functions such as UART receive or PWM buffer reloads. Unlike RL78/G13 devices that offer multiple DMA channels and flexible source-destination mapping, this MCU lacks programmable DMA routing, restricting parallel data movement. In applications requiring simultaneous ADC sampling and UART transmission—such as real-time sensor logging—the absence of multi-channel DMA forces CPU intervention, increasing latency and reducing throughput. Designers must therefore optimize ISRs or use polling for secondary data paths.
Does the integrated watchdog timer in the R5F109AAJSP#V0 support windowed operation, and how does it affect software robustness?
No, the watchdog timer in the R5F109AAJSP#V0 is a conventional one-shot timer with a fixed timeout period typically configurable from 1 ms to 4 s depending on clock source. It does not support windowed operation found in some ARM or AVR variants. This simplifies usage but increases risk of accidental resets if firmware enters unexpected loops. To mitigate this, implement periodic status flags and use nested interrupts cautiously. Since the device also features Power-on Reset (POR) and Low Voltage Detection (LVD), these complementary protections help maintain system integrity despite the simpler WDT implementation.
How does the operating temperature range of the R5F109AAJSP#V0 impact PCB layout decisions in engine bay-mounted units?
Operating across -40°C to 85°C necessitates careful selection of PCB materials with stable CTE (coefficient of thermal expansion) to avoid solder joint fatigue during thermal cycles. Use lead-free solders compatible with high-temp assembly processes and avoid components near the MCU that degrade faster at elevated temperatures, such as electrolytic capacitors. Thermal vias under the 30-LSSOP package improve heat dissipation from the exposed pad, though conduction through the board is limited. Layout should also consider signal integrity at 32 MHz, especially for I2C and CSI lines, which may exhibit increased jitter or attenuation at extreme temperatures due to parasitic capacitance changes.
Can the R5F109AAJSP#V0 drive inductive loads directly, and what protection circuitry is recommended?
The GPIO pins of the R5F109AAJSP#V0 are not rated for sustained current above 20 mA per pin, limiting direct drive of relays or motors. Inductive loads require flyback diodes across the coil terminals to suppress voltage spikes caused by back-EMF. Alternatively, use external MOSFET drivers controlled by the MCU outputs. If driving LEDs or lamps, include current-limiting resistors sized for worst-case Vf at minimum supply (e.g., 1.6V), ensuring brightness remains consistent across the full operating voltage range. Always validate thermal performance of passive components under continuous load.
What role does the internal oscillator play in the R5F109AAJSP#V0’s clock architecture, and how accurate is it for time-critical protocols?
The R5F109AAJSP#V0 relies on an internal 32 MHz RC oscillator for most operations, with ±2% accuracy typical over temperature and voltage. While sufficient for UART baud rates and basic timers, this drift can cause timing errors in precision applications like I²C fast-mode (up to 400 kHz) or when synchronizing with external clocks. For stricter timing needs, use an external crystal with PLL to generate a stable 32 MHz reference, though this adds cost and board space. In automotive diagnostics using KWP2000 or UDS over LIN, internal clock tolerance is generally acceptable given protocol error recovery mechanisms.
How does the EEPROM size of 4K x 8 in the R5F109AAJSP#V0 affect data logging strategies in fleet monitoring systems?
With only 4 kilobits of non-volatile storage, the R5F109AAJSP#V0 can store approximately 500 records of 8-byte sensor readings before overwriting begins. This makes it unsuitable for high-frequency logging over extended periods. Instead, implement circular buffering with periodic batch uploads via CAN or LIN. Alternatively, compress data before writing—for example, delta encoding temperature values—to maximize retention. Note that EEPROM endurance is ~100,000 write cycles, so avoid frequent writes; defer persistent updates until intervals exceed 10 seconds to preserve longevity.
Is the R5F109AAJSP#V0 suitable for functional safety applications requiring ASIL certification?
No, the R5F109AAJSP#V0 does not meet ISO 26262 functional safety requirements for ASIL-B/D levels. While it includes LVD and POR for basic fault detection, it lacks built-in hardware redundancy, lockstep cores, or memory protection units necessary for safety-critical diagnostics. Its use is appropriate for QM (Quality Managed) systems such as door control modules or interior lighting, but not for airbag deployment, braking, or steering assistance where formal safety analysis is mandated. Always consult Renesas’ safety manuals for certified alternatives like the RH850 family.
How does the choice of package (30-LSSOP) influence thermal and mechanical stress in automotive assemblies?
The 30-LSSOP (6.10 mm width) offers compact size ideal for space-constrained designs but presents challenges in high-vibration environments. The smaller footprint reduces solder joint strain compared to larger QFP packages, yet the fine-pitch leads (0.5 mm) demand precise reflow profiles to avoid bridging or tombstoning. Thermal performance is adequate for moderate power dissipation (<100 mW), but without an exposed thermal pad, heat sinking relies solely on PCB copper area. In under-hood applications, ensure conformal coating prevents moisture ingress into joints subject to condensation cycles.
What precautions should be taken when programming the R5F109AAJSP#V0 in mass production using Renesas’ flash loader?
Verify power sequencing: apply Vcc before programming signals to prevent latch-up. Use regulated supplies within 1.6–5.5V with <50 mV ripple. Disable the watchdog and clear security bits before programming to allow rewrites. For production efficiency, enable batch erase and verify checksums post-load. Note that flash programming consumes more current (~10 mA) than normal operation, so bypass any LDO regulators during programming or ensure they can sustain peak loads. Also, confirm MSL 3 handling procedures—store boards in dry packs with desiccant for up to 168 hours before assembly.
How does the ADC resolution (8x8/10-bit) in the R5F109AAJSP#V0 impact sensor interface accuracy in precision measurement circuits?
The ADC provides 8 selectable input channels with either 8-bit or 10-bit resolution, selected via software configuration. At 10-bit resolution, the step size at 5V is 4.88 mV, yielding ~0.1% theoretical accuracy. However, internal noise floor and reference instability reduce effective resolution to ~9–10 bits in practice. For thermistors or pressure sensors requiring sub-millivolt precision, add external amplification and filtering. Ensure analog ground is isolated from digital return currents, and sample during stable phases to avoid aliasing from PWM switching. Calibration routines should compensate for offset and gain errors introduced by temperature drift.

Parts with Similar Specifications

The three parts on the right have similar specifications to Renesas Electronics America Inc R5F109AAJSP#V0

Product Attribute R5F109AAJSP#V0 R5F109ACJSP#V0 R5F109AAJSP#X0 R5F1096DJSP#X0Q
Part Number R5F109AAJSP#V0 R5F109ACJSP#V0 R5F109AAJSP#X0 R5F1096DJSP#X0Q
Manufacturer Renesas Electronics America Inc Renesas Renesas Electronics America Inc Renesas Electronics Corporation
Data Converters A/D 8x8/10b A/D 8x8/10b A/D 8x8/10b -
Series Automotive, AEC-Q100, RL78/F12 RL78/F12 Automotive, AEC-Q100, RL78/F12 -
Peripherals DMA, LVD, POR, PWM, WDT DMA, LVD, POR, PWM, WDT DMA, LVD, POR, PWM, WDT -
Number of I/O 21 21 21 -
Mounting Type Surface Mount Surface Mount Surface Mount -
Oscillator Type Internal Internal Internal -
Base Product Number R5F109 - R5F109 -
Operating Temperature -40°C ~ 85°C (TA) -40°C ~ 85°C (TA) -40°C ~ 85°C (TA) -
EEPROM Size 4K x 8 4K x 8 4K x 8 -
Program Memory Size 16KB (16K x 8) 32KB (32K x 8) 16KB (16K x 8) -
Core Size 16-Bit 16-Bit 16-Bit -
Connectivity CSI, I²C, LINbus, UART/USART CSI, I²C, LINbus, UART/USART CSI, I²C, LINbus, UART/USART -
Speed 32MHz 32MHz 32MHz -
Package Tray Bulk Tape & Reel (TR) -
Voltage - Supply (Vcc/Vdd) 1.6V ~ 5.5V 1.6V ~ 5.5V 1.6V ~ 5.5V -
RAM Size 1K x 8 2K x 8 1K x 8 -
Program Memory Type FLASH FLASH FLASH -
Supplier Device Package 30-LSSOP 30-LSSOP 30-LSSOP -
Core Processor RL78 RL78 RL78 -
Package / Case 30-LSSOP (0.240', 6.10mm Width) 30-LSSOP (0.240", 6.10mm Width) 30-LSSOP (0.240', 6.10mm Width) -

R5F109AAJSP#V0 Datasheet PDF

Download R5F109AAJSP#V0 pdf datasheets and Renesas Electronics America Inc documentation for R5F109AAJSP#V0 - Renesas Electronics America Inc.

PCN Packaging
2.73KHz.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Embe***dMotion
    Aug 5, 2026

    Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

  • FPGA***dio
    Jul 30, 2026

    This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

  • Nord***mbedded
    Jul 20, 2026

    Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

  • Arch***ct
    Jul 15, 2026

    Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

  • FPGA***lorer88
    Jul 7, 2026

    The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

  • Nath***oleman
    Jun 29, 2026

    Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

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Common Countries Logistic Time Reference
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America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
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R5F109AAJSP#V0 Image

R5F109AAJSP#V0

Renesas Electronics America Inc
32D-R5F109AAJSP#V0

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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