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Renesas R5F103A9ASP#50
- Part No.:
- R5F103A9ASP#50
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 30-LSSOP (0.240", 6.10mm Width)
- Datasheet:
-
R5F103A9ASP#50.pdf
- Description:
- IC MCU 16BIT 12KB FLASH 30LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,388
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Product details
Overview
R5F103A9ASP#50 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, 768 B RAM, 8-channel 10-bit ADC, 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 R5F103A9ASP#50 datasheet, R5F103A9ASP#50 pinout, R5F103A9ASP#50 application, or R5F103A9ASP#50 equivalent, key selection criteria include its 30-pin LSSOP package, absence of data flash memory, single UART channel, lack of DMA and safety functions (CRC/RAM guard), and suitability for cost-sensitive, battery-powered consumer control systems requiring minimal peripheral count and verified thermal stability up to +85°C.
Technical Context
The R5F103A9ASP#50 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, supporting 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 no external crystal oscillator support in default configuration.
Peripheral integration includes one 16-bit timer array (TAU) with 8 channels, one 12-bit interval timer, one window watchdog timer, and simplified serial interfaces limited to one UART and one CSI (Simplified SPI) channel - omitting I²C, DMA, and safety peripherals present in R5F102 variants. The device uses a fixed 30-pin LSSOP package with REGC pin requiring 0.47–1 µF decoupling to VSS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC CPU with 3-stage pipeline, 1 MB address space |
| Operating Voltage | 1.8 V to 5.5 V - enables direct interface with 1.8/2.5/3.3/5 V logic without level shifters |
| Flash / RAM | 8 KB code flash (1 KB block size), 768 B RAM - sufficient for compact firmware with real-time control loops |
| ADC | 8-channel 10-bit A/D converter with internal 1.45 V reference - supports sensor monitoring without external reference |
| Timers | 8-channel 16-bit TAU, 1-channel 12-bit interval timer, 1-channel window watchdog - enables multi-output PWM and precise timing intervals |
| Serial Interfaces | 1 UART channel, 1 CSI (Simplified SPI) channel - adequate for basic host communication and sensor interfacing |
| Power Modes | HALT, STOP, SNOOZE - achieves 63 μA/MHz active current and sub-μA standby consumption |
Pinout & Package
Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P20/ANI0/AVREFP | Analog input / positive reference | Primary analog reference input; must be decoupled for stable ADC operation |
| P21/ANI1/AVREFM | Analog input / negative reference | Differential reference pair with P20; defines ADC common-mode range |
| P10/SCK00/SCL00 | Serial clock output/input | Shared CSI clock or I²C clock - configured via PIOR register |
| P11/SI00/RxD0/TOOLRxD | Serial data input / UART receive | Primary UART RX path; also supports tool interface for debugging |
| P12/SO00/TxD0/TOOLTxD | Serial data output / UART transmit | Primary UART TX path; dual-use for on-chip debug communication |
| P31/TI03/TO03/INTP4/PCLBUZ0 | Timer input/output / interrupt / buzzer clock | Multi-function pin supporting PWM generation, external event capture, and audible feedback |
| REGC | Voltage regulator capacitor terminal | Requires 0.47–1 µF capacitor to VSS; omission causes unstable internal voltage regulation |
| RESET | Active-low reset input | Asynchronous reset pin; accepts standard push-button or supervisor IC assertion |
| VDD / VSS | Power supply / ground | Dual power pins ensure low-noise analog/digital separation; decoupling required near package |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 63 μA/MHz active current enables >1-year battery life in coin-cell-powered devices |
| No data flash memory | Eliminates write endurance management overhead and simplifies firmware update architecture |
| Consumer-grade temperature range | –40°C to +85°C rating targets white goods, remote controls, and portable consumer electronics |
| On-chip debug support | Enables in-circuit programming and real-time trace without external JTAG adapter |
| Programmable clock/buzzer output | PCLBUZ0 pin generates precise 2.44 kHz–10 MHz tones or clocks for displays or audio feedback |
Applications
| Home Appliance Control | Smart Remote Systems |
|---|---|
Use Scenario: Microcontroller in washing machine main board managing motor sequencing, water valve actuation, and user interface polling. IC Role / Device Role / Timing Role: Central real-time controller executing deterministic state machines with 8-channel ADC monitoring thermistors and current sensors. Use Value: 63 μA/MHz active current extends standby duration between cycles; 8 KB flash accommodates full motor control algorithm and UI logic. | Use Scenario: IR remote control unit with button matrix scanning, IR modulation, and low-battery detection. IC Role / Device Role / Timing Role: Low-power system-on-chip handling key scan interrupts, UART-based firmware updates, and precise 38 kHz carrier generation. Use Value: SNOOZE mode reduces average current to <10 μA during idle; PCLBUZ0 provides audible feedback without external driver. |
| Portable Medical Monitors | Industrial Sensor Nodes |
Use Scenario: Battery-powered pulse oximeter acquiring analog SpO₂ signals and driving OLED display via SPI. IC Role / Device Role / Timing Role: Signal acquisition controller performing 10-bit ADC sampling, digital filtering, and display refresh synchronization. Use Value: 1.8 V minimum operating voltage allows direct use of single Li-ion cell; 8-channel ADC supports dual-sensor simultaneous sampling. | Use Scenario: DIN-rail mounted temperature/humidity node transmitting data via UART to gateway over RS-485. IC Role / Device Role / Timing Role: Edge intelligence node executing local threshold alarms and UART packet framing before transmission. Use Value: –40°C to +85°C rating ensures reliability in unconditioned enclosures; 30-pin LSSOP provides robust PCB mounting for vibration-prone environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F102AAASP#50 | Includes 2 KB data flash, CRC/RAM guard, DMA, and ±1.0% oscillator accuracy | Required for field-upgradable firmware or safety-critical logging where data retention is mandatory | Select when data flash endurance (1M writes) and enhanced oscillator stability justify higher BOM cost |
| R5F103AAASP#50 | Same package and core but with 16 KB code flash and identical peripheral set | Suitable for larger firmware images requiring bootloader, USB stack, or advanced UI rendering | Choose when application firmware exceeds 8 KB and no data flash or safety features are needed |
Compared with R5F102AAASP#50, R5F103A9ASP#50 trades data flash, DMA, and tighter oscillator tolerance for lower unit cost and reduced firmware complexity; versus R5F103AAASP#50, it offers identical functionality at lower memory density - making it optimal for cost-constrained, fixed-function consumer devices.
Availability
R5F103A9ASP#50 is available at Aetrix Electronics and suitable for home appliance control, smart remote systems, portable medical monitors, and industrial sensor nodes requiring stable component supply across production lifecycles.
Supply support for R5F103A9ASP#50 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 devices for automotive, industrial, and consumer markets.
The RL78/G12 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated consumer electronics requiring high integration, proven reliability, and streamlined development with scalable toolchains.
FAQ
What is the maximum operating frequency of the R5F103A9ASP#50?
The R5F103A9ASP#50 supports a maximum system clock frequency of 24 MHz using its high-speed on-chip oscillator. At this speed, it delivers 31 DMIPS performance while maintaining 63 μA/MHz active current efficiency. External crystal oscillation up to 20 MHz is supported via X1/X2 pins, but the R5F103A9ASP#50 variant does not include the enhanced oscillator accuracy or data flash found in R5F102 counterparts.
Does the R5F103A9ASP#50 include data flash memory?
No, the R5F103A9ASP#50 does not include data flash memory. Per Renesas documentation, R5F103-series devices omit the 2 KB data flash present in R5F102-series parts. This simplifies firmware architecture by removing wear-leveling requirements but requires external non-volatile storage or code flash partitioning for parameter retention in the R5F103A9ASP#50.
What are the key differences between R5F103A9ASP#50 and R5F102AAASP#50?
The R5F103A9ASP#50 lacks data flash memory, DMA controller, CRC calculation unit, RAM guard, and SFR guard features present in the R5F102AAASP#50. Its high-speed on-chip oscillator has ±5.0% accuracy (vs. ±1.0% in R5F102), and it omits simplified I²C and second CSI channels. These omissions reduce cost and power but limit functional safety and peripheral flexibility in the R5F103A9ASP#50.
Which development tools support the R5F103A9ASP#50?
The R5F103A9ASP#50 is fully supported by Renesas e² studio IDE, CS+ (formerly CubeSuite+), and the Renesas Flash Programmer. Hardware debugging uses the on-chip debug interface via TOOLRxD/TOOLTxD pins - no external emulator required. Example projects, HAL drivers, and RL78/G12-specific application notes are available from the Renesas website for the R5F103A9ASP#50.
What is the function of the REGC pin on the R5F103A9ASP#50?
The REGC pin on the R5F103A9ASP#50 connects to an external 0.47–1 µF capacitor to VSS to stabilize the internal voltage regulator. This capacitor is mandatory for reliable operation; omission causes erratic behavior, especially during ADC conversions or low-power mode transitions. The REGC pin appears only on 30-pin RL78/G12 packages like the R5F103A9ASP#50 and must not be left floating or tied to VDD.
R5F103A9ASP#50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 30-LSSOP (0.240", 6.10mm Width)
- Series:
- RL78/G12
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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#50 FAQ
1.How can I place an order for R5F103A9ASP#50 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F103A9ASP#50 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#50 reliable?
The price and inventory of R5F103A9ASP#50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F103A9ASP#50 is usually 5 days.
3.What payment methods are accepted for R5F103A9ASP#50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F103A9ASP#50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F103A9ASP#50?
R5F103A9ASP#50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F103A9ASP#50 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#50?
For technical support, including R5F103A9ASP#50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F103A9ASP#50 requirements.
6.How does Aetrix verify that R5F103A9ASP#50 is sourced from the original manufacturer or authorized distributors?
All R5F103A9ASP#50 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#50 meets industry standards.
7.What is the process for return or replacement of R5F103A9ASP#50?
All R5F103A9ASP#50 units undergo pre-shipment inspection (PSI). If there is an issue with R5F103A9ASP#50, 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#50 part is unused and in its original packaging.
Return procedure for R5F103A9ASP#50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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