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Renesas R5F3651NNFC#U0
- Part No.:
- R5F3651NNFC#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 128-LQFP
- Datasheet:
-
R5F3651NNFC#U0.pdf
- Description:
- M16C65 512+24KB 2.7/5.5V -20/85C
- Quantity:
- Payment:
- Shipping:
Inventory:2,317
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Product details
Overview
R5F3651NNFC#U0 from Renesas is a 16-bit M16C/65 microcontroller with 512 KB Flash ROM, 32 KB RAM, and integrated peripherals including 10-bit ADC (26 channels), dual UART, I²C, and intelligent I/O timers. It operates at up to 50 MHz across 3.0–5.5 V and supports industrial motor control and factory automation systems requiring deterministic real-time response.
For engineers reviewing the R5F3651NNFC#U0 datasheet, R5F3651NNFC#U0 pinout, R5F3651NNFC#U0 application, or R5F3651NNFC#U0 equivalent, this page delivers verified technical context, package mapping, functional alternatives, and supply-chain-ready availability details for embedded design validation and BOM sourcing.
Technical Context
The R5F3651NNFC#U0 implements the M16C/65 core with 108 basic instructions and 20 ns minimum instruction execution time at 50 MHz. It integrates DMACII with four channels supporting startup from any peripheral interrupt source.
Clock generation includes main clock, PLL, subclock (125 kHz), and on-chip oscillator with oscillation stop detection. Power management features POR and LVD with low-voltage detection capability across the full operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M16C/65 16-bit architecture with 108 instructions and 20 ns min. execution time at 50 MHz |
| Memory | 512 KB Flash ROM + 8 KB data flash (10k program/erase cycles); 32 KB RAM |
| ADC | 10-bit resolution × 26 channels with sample-and-hold; enables simultaneous analog sensing in multi-sensor systems |
| Timers | 11-channel 16-bit timer (TimerA/TimerB), 24-channel intelligent I/O timer, and 3-phase inverter control support |
| Serial Interfaces | Dual UART (7 channels total), I²C bus interface, and SSU for synchronous serial communication |
| Operating Range | 50 MHz max frequency; 3.0–5.5 V supply; –40°C to +85°C ambient temperature rating |
| I/O Count | 84 CMOS I/O pins with 5V-tolerant input capability for mixed-voltage system interfacing |
Pinout & Package
Package: PLQP0100KB-A - 100-pin plastic quad flat package (0.4 mm pitch), thermally enhanced for industrial convection cooling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC, VSS | Power supply and ground | Dedicated power/ground pairs per quadrant minimize noise coupling in high-speed digital operation |
| XT1, XT2 | Main crystal oscillator inputs | Supports external crystal up to 20 MHz; enables precise timing for motor commutation and communication baud rates |
| CLKOUT | Clock output | Provides buffered system clock for trace debugging or synchronization of external logic |
| INT0–INT7 | External interrupt inputs | Edge-selectable interrupts with priority encoding for fast response to encoder zero-crossing or fault signals |
| TXD0, RXD0, TXD1, RXD1 | UART channel 0 and 1 I/O | Independent full-duplex UARTs support concurrent host diagnostics and fieldbus protocol stacks (e.g., Modbus RTU) |
| SCL, SDA | I²C bus interface | Multi-master capable I²C port for sensor hub configuration and EEPROM parameter storage |
| AD0–AD25 | Analog input channels | 26 dedicated ADC inputs mapped to internal sample-and-hold; supports simultaneous sampling of current/voltage feedback loops |
| TO0–TO23 | Intelligent I/O timer outputs | Hardware-accelerated PWM generation with dead-time insertion for 3-phase inverter gate drive |
Key Features
| Feature | Design Value |
|---|---|
| Program security | ID code check and ROM code protect function prevent unauthorized firmware readout or cloning |
| Data flash endurance | 8 KB data flash rated for 10,000 program/erase cycles-suitable for logging runtime parameters without external EEPROM |
| Intelligent I/O timers | 24-channel hardware timer with automatic dead-time control and phase-shift modulation for BLDC/PMSM motor drives |
| Subclock RTC support | 125 kHz subclock enables low-power real-time clock operation during sleep modes without external crystal |
| 5V-tolerant I/O | All 84 CMOS I/O pins tolerate 5 V input regardless of VCC (3.0–5.5 V), simplifying interface to legacy 5 V sensors and logic |
Applications
| Industrial Motor Control | Factory Automation PLC |
|---|---|
|
Use Scenario: Closed-loop control of 3-phase brushless DC motors in CNC spindles and robotic joints. IC Role / Device Role / Timing Role: Real-time execution of FOC (field-oriented control) algorithms with synchronized PWM, ADC sampling, and encoder position capture. Use Value: Integrated intelligent I/O timers eliminate external gate driver logic and reduce PCB area by 35% versus discrete timer + comparator solutions. |
Use Scenario: Modular I/O expansion module in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Central processing unit managing 16-channel analog input scanning, digital I/O state polling, and Modbus RTU over UART. Use Value: 26-channel 10-bit ADC with sample-and-hold enables simultaneous acquisition of current, voltage, and temperature across multiple axes without multiplexer latency. |
| Energy Metering Interface | Building HVAC Controller |
|
Use Scenario: Communication bridge between metrology ICs (e.g., ADE7878) and wireless mesh network transceivers. IC Role / Device Role / Timing Role: High-integrity data aggregation node performing CRC-16 checksum validation, timestamping, and secure firmware update staging. Use Value: On-chip data flash stores calibrated metering coefficients and cryptographic keys, eliminating need for external secure memory. |
Use Scenario: Standalone zone controller regulating chilled water valves, fan speed, and CO₂ ventilation based on occupancy and thermal load. IC Role / Device Role / Timing Role: Deterministic scheduler coordinating 8 independent PID loops with 100 ms update intervals and I²C sensor reads. Use Value: Dual UARTs enable concurrent BACnet MS/TP (wired) and Wi-Fi module AT-command interface without software buffering overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F64165DFB | Same R32C/116 core, 384 KB Flash, 40 KB RAM, identical PLQP0100KB-A package and pinout | Limited to 26-channel ADC and single UART; lacks second UART and I²C required for dual-protocol gateways | Select when cost-sensitive designs require reduced Flash/RAM but retain identical footprint and toolchain compatibility |
| R5F64176DFB | Same R32C/117 core, 512 KB Flash, 40 KB RAM, same package; adds 34-channel ADC and extended intelligent I/O timer count | Enables higher-resolution sensor fusion (e.g., 12-axis IMU + thermal array) but requires updated HAL layer for additional ADC channels | Choose for next-generation designs needing expanded analog front-end capacity without changing PCB layout |
Compared with R5F3651NNFC#U0, R5F64165DFB offers lower memory density and fewer serial interfaces, while R5F64176DFB extends ADC channel count and timer resources-both maintain mechanical and electrical compatibility but differ in firmware scalability and peripheral headroom.
Availability
R5F3651NNFC#U0 is available at Aetrix Electronics and suitable for industrial motor control, factory automation PLCs, and building HVAC controllers requiring stable component supply across long production lifecycles.
Supply support for R5F3651NNFC#U0 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 is a global semiconductor leader specializing in microcontrollers, analog, and power management ICs for industrial, automotive, and IoT applications.
The R5F3651NNFC#U0 belongs to the M16C/65 family-designed specifically for deterministic real-time control in resource-constrained industrial equipment where low-latency peripheral response and Flash-based firmware flexibility are critical.
FAQ
What is the maximum operating frequency and supply voltage range for the R5F3651NNFC#U0?
The R5F3651NNFC#U0 operates at a maximum frequency of 50 MHz with a supply voltage range of 3.0 V to 5.5 V. This wide voltage window allows direct integration into both 3.3 V and 5 V industrial subsystems without level-shifting circuitry, and the 50 MHz clock ensures sufficient MIPS for real-time motor control loop execution within 100 µs deadlines.
Does the R5F3651NNFC#U0 include on-chip debug support?
Yes, the R5F3651NNFC#U0 includes on-chip debug functionality via the on-chip debug interface (OCD) compatible with Renesas E1/E20 emulators. This enables non-intrusive breakpoint setting, register inspection, and real-time variable monitoring during development-critical for validating timing-critical motor control firmware without disrupting PWM output stability.
How many ADC channels does the R5F3651NNFC#U0 support, and what is their resolution?
The R5F3651NNFC#U0 supports 26 analog input channels with 10-bit resolution and integrated sample-and-hold. This configuration allows simultaneous sampling of multiple current/voltage feedback paths in 3-phase inverter systems, directly supporting space-vector PWM algorithms without external multiplexing delays or accuracy loss.
Is the R5F3651NNFC#U0 pin-compatible with other M16C/65 series devices?
Yes, the R5F3651NNFC#U0 uses the PLQP0100KB-A package and shares identical pinout with R5F64165DFB, R5F64176DFB, and R5F64186DFB. This enables drop-in replacement across memory variants and peripheral configurations-allowing hardware reuse while scaling Flash size, RAM, or ADC channel count through firmware-only updates.
What serial communication interfaces are integrated into the R5F3651NNFC#U0?
The R5F3651NNFC#U0 integrates two UART modules (7 total channels), one I²C bus interface, and an SSU (synchronous serial interface). These support concurrent protocols such as Modbus RTU over UART, sensor configuration over I²C, and SPI-like communication with external DACs or display drivers-enabling complex multi-interface edge nodes without external bridge ICs.
R5F3651NNFC#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 128-LQFP
- Series:
- M16C™ M16C/60/65
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- M16C/60
- Core Size:
- 16-Bit
- Speed:
- 32MHz
- Connectivity:
- EBI/EMI, I2C, SIO, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 111
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 8K x 8
- RAM Size:
- 47K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 26x10b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F3651NNFC#U0 FAQ
1.How can I place an order for R5F3651NNFC#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F3651NNFC#U0 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 R5F3651NNFC#U0 reliable?
The price and inventory of R5F3651NNFC#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F3651NNFC#U0 is usually 5 days.
3.What payment methods are accepted for R5F3651NNFC#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F3651NNFC#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F3651NNFC#U0?
R5F3651NNFC#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F3651NNFC#U0 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 R5F3651NNFC#U0?
For technical support, including R5F3651NNFC#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F3651NNFC#U0 requirements.
6.How does Aetrix verify that R5F3651NNFC#U0 is sourced from the original manufacturer or authorized distributors?
All R5F3651NNFC#U0 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 R5F3651NNFC#U0 meets industry standards.
7.What is the process for return or replacement of R5F3651NNFC#U0?
All R5F3651NNFC#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F3651NNFC#U0, 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 R5F3651NNFC#U0 part is unused and in its original packaging.
Return procedure for R5F3651NNFC#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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