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Renesas R5F103A9ASP#V0
- Part No.:
- R5F103A9ASP#V0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 30-LSSOP (0.240", 6.10mm Width)
- Datasheet:
-
R5F103A9ASP#V0.pdf
- Description:
- IC MCU 16BIT 12KB FLASH 30LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,228
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Product details
Overview
R5F103A9ASP#V0 from Renesas Electronics is a 30-pin LSSOP-packaged RL78/G12 16-bit microcontroller designed for ultra-low-power general-purpose embedded control. It features 8 KB code flash, 768 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 temperature - deployed in battery-powered sensor nodes and industrial HMI panels.
For engineers reviewing the R5F103A9ASP#V0 datasheet, R5F103A9ASP#V0 pinout, R5F103A9ASP#V0 application, or R5F103A9ASP#V0 equivalent, key selection criteria include its absence of data flash memory, reduced serial interface count (no Simplified I²C), lack of DMA, and ±5.0% high-speed on-chip oscillator accuracy at industrial temperature range - all critical for deterministic timing and firmware update architecture decisions.
Technical Context
The R5F103A9ASP#V0 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and 1 MB address space. It supports HALT, STOP, and SNOOZE low-power modes, achieving 63 μA/MHz active current consumption at 24 MHz operation using the high-speed on-chip oscillator.
Its peripheral set 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, and voltage detector with 12 selectable reset/IRQ thresholds - all configured via dedicated SFRs without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC with 3-stage pipeline; enables deterministic 0.04167 µs min instruction time at 24 MHz |
| Memory Configuration | 8 KB code flash (1 KB block size), 768 B RAM, no data flash - limits field firmware updates requiring external storage |
| Operating Voltage | 1.8 V to 5.5 V single supply - supports direct interfacing with 1.8 V, 3.3 V, and 5 V logic domains |
| A/D Converter | 10-bit resolution, 8 input channels, internal 1.45 V reference, and integrated temperature sensor - enables standalone thermal monitoring without external references |
| Serial Interfaces | 1 UART channel only; no Simplified I²C or CSI beyond CSI00 - restricts multi-sensor bus topology options |
| Timer Resources | 8-channel 16-bit TAU with PWM output capability and 1-channel 12-bit interval timer - sufficient for motor control timing and periodic wake-up scheduling |
| Oscillator Accuracy | ±5.0% over –40°C to +85°C for high-speed on-chip oscillator - requires calibration or external crystal for time-critical comms |
Pinout & Package
Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), JEDEC MS-013AC compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P10/SCK00/SCL00 | Serial clock I/O | Configurable as SPI clock or I²C clock; shared function requires software mode selection |
| P11/SI00/RxD0/SDA00 | Serial data input / UART receive / I²C data | Primary UART RX path; also serves as SPI input or I²C bidirectional data line |
| P12/SO00/TxD0/TOOLTxD | Serial data output / UART transmit / debug TX | Dual-use pin for application UART TX and on-chip debug communication |
| P20/ANI0/AVREFP | Analog input / A/D reference positive | Primary analog input channel and selectable A/D reference voltage source |
| P21/ANI1/AVREFM | Analog input / A/D reference negative | Second analog input and optional A/D reference ground reference point |
| RESET | Active-low reset input | Asynchronous hardware reset; accepts 1.8–5.5 V logic levels; internal pull-up enabled |
| VDD / VSS | Power supply / Ground | Single 1.8–5.5 V supply rail; decoupling capacitor required per datasheet layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power operation | 63 μA/MHz active current enables >1-year battery life in 10-second wakeup sensor nodes |
| SNOOZE mode | Permits UART reception while CPU remains halted - reduces average system power by >90% during idle listening |
| On-chip voltage detector | 12 programmable threshold levels support brown-out detection and graceful shutdown at 1.88–4.06 V |
| Programmable clock/buzzer output | PCLBUZ0 generates precise 2.44 kHz–10 MHz square waves for buzzer drive or clock distribution without timers |
| Key interrupt function | Hardware scan of up to 10 KR pins eliminates polling overhead in keypad-based HMI designs |
Applications
| Smart Home Sensor Node | Industrial Panel Controller |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data every 30 seconds via UART to gateway. IC Role / Device Role / Timing Role: Main system controller executing sensor read, ADC conversion, UART transmission, and low-power state management. Use Value: 63 μA/MHz active current and SNOOZE mode extend CR2032 battery life beyond 18 months without compromising measurement frequency. |
Use Scenario: Front-panel controller managing LED indicators, push-button inputs, and status display via GPIO and UART. IC Role / Device Role / Timing Role: Dedicated UI processor handling real-time button debouncing, LED PWM dimming, and host communication. Use Value: Integrated key interrupt and programmable buzzer output eliminate external debounce ICs and audio drivers, reducing BOM count by 3 components. |
| Energy Meter Interface Module | Appliance Motor Control Subsystem |
Use Scenario: Isolated metering interface collecting pulse outputs from kWh meters and relaying via UART to main MCU. IC Role / Device Role / Timing Role: Standalone pulse counter and protocol translator with precise timing for pulse width measurement. Use Value: 8-channel 10-bit ADC and 12-bit interval timer enable simultaneous voltage monitoring and accurate pulse edge capture at <1 µs resolution. |
Use Scenario: Fan speed controller using PWM output to drive MOSFET gate and ADC to monitor current feedback. IC Role / Device Role / Timing Role: Real-time motor actuator with closed-loop current sensing and thermal protection. Use Value: On-chip temperature sensor and 8-channel TAU allow full motor control loop execution without external thermal diodes or PWM generators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F102AAASP#V0 | Includes 2 KB data flash, ±1.0% oscillator accuracy, DMA, CRC, and RAM guard - adds 2 KB nonvolatile parameter storage and safety features | Required where field firmware updates or secure boot verification are mandated | Select when data logging, secure configuration storage, or functional safety compliance (IEC 61508 SIL-2) is needed |
| R5F103AAASP#V0 | Same package and pinout; differs only in memory: 16 KB code flash vs. 8 KB - no change to peripherals or timing specs | Preferred for applications needing larger firmware image or future feature expansion headroom | Choose when bootloader complexity, OTA update partitioning, or dual-bank firmware is planned |
Compared with R5F102AAASP#V0, R5F103A9ASP#V0 trades data flash and oscillator precision for lower cost and reduced qualification effort; versus R5F103AAASP#V0, it offers identical functionality at lower memory cost - making it optimal for cost-sensitive, fixed-function embedded controllers.
Availability
R5F103A9ASP#V0 is available at Aetrix Electronics and suitable for smart home sensors, industrial HMI panels, energy meter interfaces, and appliance motor control subsystems requiring stable component supply and long-term production continuity.
Supply support for R5F103A9ASP#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 Tokyo, 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 industrial control applications - emphasizing energy efficiency, integrated analog, and simplified development.
FAQ
What is the maximum operating frequency of the R5F103A9ASP#V0?
The R5F103A9ASP#V0 supports a maximum high-speed on-chip oscillator frequency of 24 MHz, delivering 31 DMIPS performance. External crystal operation is limited to 20 MHz in HS mode (VDD ≥ 2.7 V) or 8 MHz in LS mode (VDD ≥ 1.8 V). The actual achievable frequency depends on supply voltage and oscillator configuration - always verify timing margins using the AC characteristics table in the R01DS0193EJ0250 datasheet.
Does the R5F103A9ASP#V0 include data flash memory?
No, the R5F103A9ASP#V0 does not include data flash memory. Per Renesas documentation, R5F103-series devices omit the 2 KB data flash found in R5F102-series counterparts. This means nonvolatile parameter storage must be implemented externally (e.g., EEPROM or external SPI flash), and self-programming of runtime parameters is not supported on-chip.
How many UART channels does the R5F103A9ASP#V0 support?
The R5F103A9ASP#V0 supports exactly one UART channel (UART0). Unlike higher-pin-count R5F102 variants, it does not implement UART1 or UART2. This single UART is multiplexed on P11 (RxD0) and P12 (TxD0), and may be used concurrently with SNOOZE mode for low-power receive operations.
What is the A/D converter resolution and channel count on the R5F103A9ASP#V0?
The R5F103A9ASP#V0 integrates an 8-channel, 10-bit successive-approximation A/D converter with internal 1.45 V reference voltage and integrated temperature sensor. Input channels include ANI0–ANI3 and ANI16–ANI19. Conversion time is 1.15 µs per sample at fADCLK = 12 MHz, supporting up to 870 kSPS aggregate throughput.
Is the R5F103A9ASP#V0 pin-compatible with other RL78/G12 30-pin variants?
Yes, the R5F103A9ASP#V0 shares identical 30-pin LSSOP package dimensions and pinout with all other RL78/G12 30-pin devices including R5F102AAASP#V0 and R5F103AAASP#V0. Function allocation per pin is consistent across the family, enabling hardware reuse when migrating between memory or feature variants - though peripheral enablement (e.g., DMA, data flash) must be verified in software.
R5F103A9ASP#V0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 30-LSSOP (0.240", 6.10mm Width)
- Series:
- RL78/G12
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 24MHz
- Connectivity:
- CSI, I2C, UART/USART
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 23
- Program Memory Size:
- 12KB (12K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 8x8/10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F103A9ASP#V0 FAQ
1.How can I place an order for R5F103A9ASP#V0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F103A9ASP#V0 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for R5F103A9ASP#V0 reliable?
The price and inventory of R5F103A9ASP#V0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F103A9ASP#V0 is usually 5 days.
3.What payment methods are accepted for R5F103A9ASP#V0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F103A9ASP#V0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F103A9ASP#V0?
R5F103A9ASP#V0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F103A9ASP#V0 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for R5F103A9ASP#V0?
For technical support, including R5F103A9ASP#V0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F103A9ASP#V0 requirements.
6.How does Aetrix verify that R5F103A9ASP#V0 is sourced from the original manufacturer or authorized distributors?
All R5F103A9ASP#V0 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that R5F103A9ASP#V0 meets industry standards.
7.What is the process for return or replacement of R5F103A9ASP#V0?
All R5F103A9ASP#V0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F103A9ASP#V0, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The R5F103A9ASP#V0 part is unused and in its original packaging.
Return procedure for R5F103A9ASP#V0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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