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Renesas R5F10366ASP#X0
- Part No.:
- R5F10366ASP#X0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F10366ASP#X0.pdf
- Description:
- IC MCU 16BIT 2KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,043
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Product details
Overview
R5F10366ASP#X0 from Renesas Electronics is a 20-pin LSSOP ultra-low-power 16-bit RL78/G12 microcontroller designed for cost-sensitive consumer applications. It features 2 KB code flash, 256 B RAM, 1.8–5.5 V operation, -40 to +85°C temperature range (A-grade), and a 24 MHz high-speed on-chip oscillator with ±5.0% accuracy-enabling compact battery-powered sensor nodes and smart home peripherals.
For engineers reviewing the R5F10366ASP#X0 datasheet, R5F10366ASP#X0 pinout, R5F10366ASP#X0 application, or R5F10366ASP#X0 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative parts-supporting rapid selection for low-voltage embedded control in production-grade consumer electronics.
Technical Context
The R5F10366ASP#X0 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, delivering 31 DMIPS at 24 MHz. Its power management includes HALT, STOP, and SNOOZE modes, achieving 63 μA/MHz active current consumption.
It integrates an 8/10-bit 11-channel A/D converter with internal 1.45 V reference and temperature sensor, one UART channel, one simplified SPI (CSI) channel, and four 16-bit timer channels-including PWM-capable outputs-while omitting data flash, DMA, CRC, and safety guard functions present in R5F102 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC with 3-stage pipeline, 1 MB address space |
| Max Operating Frequency | 24 MHz via high-speed on-chip oscillator (±5.0% accuracy, -40 to +85°C) |
| Memory | 2 KB code flash (1 KB block size), 256 B RAM - no data flash |
| Supply Voltage | 1.8 V to 5.5 V - supports direct Li-ion/Li-Po or dual-cell alkaline operation |
| A/D Converter | 8/10-bit resolution, 11 input channels, internal 1.45 V reference, integrated temperature sensor |
| I/O Pins | 18 total I/O (12 CMOS, 4 TTL-input, 2 N-ch open-drain @ 6 V) |
| Timers | Four 16-bit timer channels (TO00–TO03), one 12-bit interval timer, one watchdog timer |
| Serial Interfaces | One UART (RxD0/TxD0), one simplified SPI (CSI00), zero I²C channels |
Pinout & Package
Package: 20-pin plastic LSSOP (4.4 × 6.5 mm, 0.65-mm pitch), JEDEC MO-153 compliant, tape-and-reel packaging (#X0).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P21/ANI1/AVREFM | Analog input / negative reference | ADC channel 1 input; selectable as AVREFM for differential analog measurements |
| P22/ANI2 | Analog input | ADC channel 2 input; supports single-ended or differential mode with P21 |
| P23/ANI3 | Analog input | ADC channel 3 input; shares port with key return function KR5 |
| P10/ANI16/PCLBUZ0/SCK00/SCL00 | Multiplexed I/O | Primary CSI00 clock output or buzzer clock generator; not usable as I²C |
| P11/ANI17/SI00/RxD0/SDA00/TOOLRxD | Serial input / UART receive | CSI00 data input, UART0 receive, or debug interface input - function selected via PIOR |
| P12/ANI18/SO00/TxD0/TOOLTxD | Serial output / UART transmit | CSI00 data output or UART0 transmit; enables full-duplex serial communication |
| P13/ANI19/TI00/TO00/INTP2 | Timer I/O / interrupt | Timer 0 input capture or output compare; also serves as external interrupt INTP2 |
| P14/ANI20/TI01/TO01/INTP3 | Timer I/O / interrupt | Timer 1 input capture or output compare; dual-role interrupt pin INTP3 |
| P61/KR5/SDAA0/(RxD0) | Key return / I²C data | Key scan input KR5 or I²C data line SDAA0; RxD0 alternate function disabled per R5F103 spec |
| P60/KR4/SCLA0/(TxD0) | Key return / I²C clock | Key scan input KR4 or I²C clock line SCLA0; TxD0 alternate function omitted in R5F103 series |
| P20/ANI0/AVREFP | Analog input / positive reference | ADC channel 0 input or AVREFP source; sets upper reference for 10-bit ADC conversions |
| P40/KR0/TOOL0 | Key return / debug I/O | Key scan input KR0 or SWD debug interface signal TOOL0 - no crystal drive capability |
| P137/INTP0 | External interrupt | Dedicated interrupt input INTP0; supports wake-up from STOP/HALT modes |
| P122/KR2/X2/EXCLK/(TI02)/(INTP2) | Crystal / external clock | Crystal oscillator terminal X2; also accepts external clock EXCLK up to 20 MHz |
| P121/KR3/X1/(TI03)/(INTP3) | Crystal / external clock | Crystal oscillator terminal X1; TI03/INTP3 alternate functions available only when X1 not used |
| VSS | Ground | Primary digital ground reference; must be connected to system GND plane |
| VDD | Power supply | Main supply rail (1.8–5.5 V); decoupling capacitor required per datasheet layout guidelines |
| P42/ANI21/SCK01/SCL01/TI03/TO03 | Analog input / timer I/O | ADC channel 21 input; also supports timer 3 I/O and CSI01 clock - CSI01 not enabled in R5F1036x |
| P41/ANI22/SO01/SDA01/TI02/TO02/INTP1 | Analog input / timer I/O | ADC channel 22 input; timer 2 I/O and INTP1 interrupt - SO01/SDA01 unused in R5F1036x |
| P125/KR1/SI01/RESET | Reset / key return | Active-low reset input with internal pull-up; KR1 key scan function available during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 63 μA/MHz active current enables multi-year battery life in coin-cell-powered devices |
| Single-supply voltage range | 1.8–5.5 V operation eliminates need for external regulators in mixed-voltage systems |
| On-chip oscillator accuracy | ±5.0% over -40 to +85°C reduces BOM cost by eliminating external crystal in non-timing-critical apps |
| Integrated analog subsystem | 11-channel 8/10-bit ADC with internal reference and temperature sensor enables standalone sensor processing |
| Hardware timer flexibility | Four 16-bit timers with input capture, output compare, and PWM support simplify motor control and timing tasks |
| Debug interface | On-chip debug via TOOL0/TOOLRxD/TOOLTxD pins enables in-system programming without dedicated JTAG header |
Applications
| Smart Thermostat Sensor Node | Wireless Remote Control |
|---|---|
Use Scenario: Battery-powered wall-mounted HVAC sensor collecting ambient temperature, humidity (via external sensor), and occupancy status. IC Role / Device Role / Timing Role: Main system controller executing sensor polling, local decision logic, and RF transmission scheduling. Use Value: 256 B RAM and 2 KB flash suffice for lightweight firmware; 1.8 V minimum supply extends AA/AAA battery life beyond 2 years. | Use Scenario: IR or sub-GHz remote transmitting button presses, battery level, and pairing status to a receiver. IC Role / Device Role / Timing Role: Input scanner for mechanical keys and encoder, UART interface to RF transceiver, and low-power state manager. Use Value: 18 GPIOs support matrix keypad + LED indicators; STOP mode current < 0.55 μA enables >5-year shelf life. |
| LED Lighting Dimmer Module | Home Appliance Control Panel |
Use Scenario: Triac- or MOSFET-based dimmer driving AC mains-connected LED strips with soft-start and thermal foldback. IC Role / Device Role / Timing Role: Analog sensing of zero-cross detection and thermistor, PWM generation for phase-cut control, and user interface handling. Use Value: Four 16-bit timers provide precise zero-cross timing and PWM duty-cycle control; 11-channel ADC monitors multiple thermal zones. | Use Scenario: Front-panel controller for microwave oven or washing machine managing touch keys, display backlight, buzzer, and safety interlocks. IC Role / Device Role / Timing Role: Real-time key scanning, buzzer tone generation, display update coordination, and fault monitoring. Use Value: PCLBUZ0 pin generates audible feedback tones without external driver; KR0–KR5 key return inputs reduce external debounce components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F10266ASP#X0 | Includes 2 KB data flash, RAM guard, CRC, and DMA; ±1.0% oscillator accuracy | Required for field firmware updates or secure checksum validation | Select when data logging, bootloader execution, or functional safety checks are needed |
| R5F10368ASP#X0 | 4 KB code flash, 512 B RAM, same peripheral set and package | Needed for larger firmware images with enhanced communication stacks or GUI frameworks | Choose when 2 KB flash is insufficient but data flash and safety features remain unnecessary |
Compared with R5F10266ASP#X0, the R5F10366ASP#X0 trades data flash and safety features for lower cost and reduced power in simpler applications; versus R5F10368ASP#X0, it offers identical functionality at lower memory density-ideal for minimal-footprint consumer control where code size is tightly constrained.
Availability
R5F10366ASP#X0 is available at Aetrix Electronics and suitable for smart home sensors, wireless remotes, LED dimmers, and appliance control panels requiring stable component supply across long production cycles.
Supply support for R5F10366ASP#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 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 consumer electronics, emphasizing energy efficiency, integration, and ease of certification in battery-operated and safety-compliant end products.
FAQ
What is the maximum operating frequency of the R5F10366ASP#X0?
The R5F10366ASP#X0 supports a maximum operating frequency of 24 MHz using its high-speed on-chip oscillator. This frequency is achievable across the full 1.8–5.5 V supply range and provides 31 DMIPS performance. The oscillator accuracy is ±5.0% over the -40 to +85°C temperature range, making it suitable for non-precision timing applications such as sensor polling and basic motor control where external crystal cost must be avoided. The R5F10366ASP#X0 does not support external crystal oscillation above 20 MHz.
Does the R5F10366ASP#X0 include data flash memory?
No, the R5F10366ASP#X0 does not include data flash memory. As confirmed in the RL78/G12 datasheet Section 1.3.1, R5F103-series devices omit the 2 KB data flash found in R5F102-series counterparts. This means the R5F10366ASP#X0 cannot perform background data rewriting or store calibration parameters in dedicated flash sectors. Firmware updates must target code flash only, and runtime parameter storage requires external EEPROM or FRAM if non-volatility is essential. The R5F10366ASP#X0 retains full self-programming capability for code flash.
Which serial interfaces are available on the R5F10366ASP#X0?
The R5F10366ASP#X0 provides one UART channel (RxD0/TxD0), one simplified SPI (CSI00) channel, and zero I²C channels. Unlike R5F10266ASP#X0, it lacks simplified I²C (IIC00/IIC01) and second CSI (CSI01) interfaces. The SCLA0 and SDAA0 pins exist physically but are repurposed exclusively as key return inputs (KR4/KR5) - they do not support I²C communication. This configuration suits point-to-point UART links to Bluetooth modules or simple SPI connections to displays/sensors, avoiding protocol stack overhead in resource-constrained designs.
What is the pin count and package type of the R5F10366ASP#X0?
The R5F10366ASP#X0 uses a 20-pin plastic LSSOP package (4.4 × 6.5 mm, 0.65-mm pitch), identified by the "SP" suffix and #X0 tape-and-reel packaging specification. It has 18 general-purpose I/O pins - including 12 CMOS I/O, 4 TTL-input-only pins, and 2 6-V-tolerant N-ch open-drain outputs - plus dedicated power (VDD/VSS), reset (P125), and crystal (X1/X2) pins. This package is JEDEC MO-153 compliant and compatible with standard SMT assembly processes, offering higher thermal performance than TSSOP while maintaining compact footprint.
Can the R5F10366ASP#X0 operate at 1.8 V supply voltage?
Yes, the R5F10366ASP#X0 is fully specified to operate at 1.8 V supply voltage across its entire -40 to +85°C industrial temperature range. At 1.8 V, it supports up to 8 MHz operation using the high-speed on-chip oscillator (per Section 1.7), enabling ultra-low-power sleep modes and extended battery life in coin-cell or energy-harvesting applications. All I/Os remain functional, and the 8/10-bit ADC maintains specified linearity and offset error. The device draws only 63 μA per MHz at 1.8 V, making it ideal for always-on sensor nodes where energy budget is critical.
R5F10366ASP#X0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- RL78/G12
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- 14
- Program Memory Size:
- 2KB (2K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 11x8/10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F10366ASP#X0 FAQ
1.How can I place an order for R5F10366ASP#X0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F10366ASP#X0 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 R5F10366ASP#X0 reliable?
The price and inventory of R5F10366ASP#X0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F10366ASP#X0 is usually 5 days.
3.What payment methods are accepted for R5F10366ASP#X0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F10366ASP#X0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F10366ASP#X0?
R5F10366ASP#X0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F10366ASP#X0 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 R5F10366ASP#X0?
For technical support, including R5F10366ASP#X0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F10366ASP#X0 requirements.
6.How does Aetrix verify that R5F10366ASP#X0 is sourced from the original manufacturer or authorized distributors?
All R5F10366ASP#X0 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 R5F10366ASP#X0 meets industry standards.
7.What is the process for return or replacement of R5F10366ASP#X0?
All R5F10366ASP#X0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F10366ASP#X0, 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 R5F10366ASP#X0 part is unused and in its original packaging.
Return procedure for R5F10366ASP#X0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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