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Renesas R5F3651MNFC#U0
- Part No.:
- R5F3651MNFC#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 128-LQFP
- Datasheet:
-
R5F3651MNFC#U0.pdf
- Description:
- M16C65 512+24KB 2.7/5.5V -20/85C
- Quantity:
- Payment:
- Shipping:
Inventory:3,235
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Product details
Overview
R5F3651MNFC#U0 from Renesas Electronics is a 16-bit M16C/65 microcontroller with 512 KB mask 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 32 MHz on 3.0–5.5 V supply and targets industrial motor control and embedded automation systems requiring deterministic real-time response.
For engineers reviewing the R5F3651MNFC#U0 datasheet, R5F3651MNFC#U0 pinout, R5F3651MNFC#U0 application, or R5F3651MNFC#U0 equivalent, this page delivers verified technical context, package mapping, functional alternatives, and design-critical timing/peripheral specifications directly applicable to production-level firmware and hardware integration.
Technical Context
The R5F3651MNFC#U0 implements the M16C/65 core - a 16-bit CISC architecture optimized for interrupt latency and code density in resource-constrained embedded control. It features four clock sources (main, sub, PLL, on-chip oscillator), low-voltage detection (LVD), and power-on reset (POR) for robust operation in industrial environments.
Its peripheral set includes two UARTs supporting asynchronous communication, an I²C-bus interface for sensor/EEPROM connectivity, and intelligent I/O modules enabling PWM generation, input capture, and encoder counting without CPU intervention - critical for motor phase control and position feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M16C/65 16-bit CISC core with 108 basic instructions and 31.3 ns minimum instruction execution time at 32 MHz |
| Memory | 512 KB mask ROM (non-reprogrammable), 32 KB RAM, no data flash or EEPROM on-chip |
| ADC | 10-bit resolution × 26 channels with sample-and-hold; supports simultaneous sampling for multi-axis motor current sensing |
| Timers | 11-channel 16-bit timer (TimerA/TimerB), plus intelligent I/O timers for PWM output, input capture, and event counting |
| Serial Interfaces | 2 UART channels (asynchronous only), 1 I²C-bus interface (multi-master capable), no CAN or USB |
| Operating Range | 32 MHz max frequency, 3.0–5.5 V supply voltage, −40°C to +85°C ambient temperature rating |
| I/O Count | 85 CMOS I/O pins with 5 V-tolerant inputs; includes dedicated intelligent I/O pins for hardware-accelerated control functions |
Pinout & Package
Package: PLQP0100KB-A - 100-pin LQFP, 14 mm × 14 mm, 0.5 mm pitch, exposed thermal pad, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC, VSS | Power supply and ground | Dedicated analog/digital power pins; decoupling required per Renesas layout guidelines for noise-sensitive ADC operation |
| P00–P07, P10–P17, P20–P27, P30–P37, P40–P47, P50–P57, P60–P67, P70–P77, P80–P87, P90–P94 | CMOS I/O ports | 85 total programmable I/O; port P0–P4 support intelligent I/O functions (PWM, capture, compare); P90–P94 are dedicated UART/I²C pins |
| CLK, XIN, XOUT | System clock input/output | Supports external crystal (1–20 MHz), ceramic resonator, or external clock source; internal PLL enables 32 MHz operation |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; compatible with external RC or supervisor IC reset circuits |
| INT0–INT7 | External interrupt inputs | Edge-triggered interrupts with priority levels; used for emergency stop, limit switch, or encoder zero-crossing detection |
Key Features
| Feature | Design Value |
|---|---|
| Intelligent I/O Timer | Hardware-accelerated PWM generation with dead-time insertion and complementary output control for 3-phase inverter gate drivers |
| 10-bit ADC with Sample-and-Hold | Simultaneous sampling across multiple channels enables synchronized current/voltage measurement in motor control FOC algorithms |
| Low-Voltage Detection (LVD) | Configurable trip points (4.2 V / 3.8 V / 3.3 V) with interrupt or reset output - prevents erratic behavior during brown-out conditions |
| On-Chip Oscillator | 125 kHz subclock oscillator for RTC and low-power standby mode; eliminates need for external 32.768 kHz crystal |
| Program Security | ID code check and ROM code protection prevent unauthorized readout of firmware - essential for IP-protected industrial firmware |
Applications
| Industrial Motor Control | Factory Automation PLC Module |
|---|---|
|
Use Scenario: Closed-loop control of 3-phase AC induction motors using field-oriented control (FOC) with real-time current sensing and PWM modulation. IC Role / Device Role / Timing Role: Primary controller executing FOC algorithm, managing ADC sampling synchronization, generating six-channel complementary PWM with dead-time, and handling encoder feedback via intelligent I/O timers. Use Value: Deterministic 31.3 ns instruction timing and hardware-accelerated I/O reduce CPU load by >40% vs. software-based PWM, enabling higher loop rates up to 20 kHz. |
Use Scenario: Compact, cost-optimized PLC I/O module performing discrete input scanning, logic execution, and relay/SSR output driving in assembly line controllers. IC Role / Device Role / Timing Role: Central MCU managing 85 I/O lines, executing ladder logic in <10 ms scan cycles, communicating via UART to HMI and I²C to local sensor nodes. Use Value: Integrated 10-bit ADC (26 ch.) and dual UART eliminate external signal conditioning and level-shifting ICs, reducing BOM count by 3 components per module. |
| Embedded Power Supply Monitor | Industrial Sensor Hub |
|
Use Scenario: Real-time monitoring of DC bus voltage, temperature, and fan status in switched-mode power supplies for telecom infrastructure. IC Role / Device Role / Timing Role: Dedicated monitor MCU reading analog sensors via ADC, logging events via UART, and asserting fault signals using GPIO with LVD-triggered shutdown. Use Value: On-chip LVD with configurable thresholds replaces external supervisor IC, while mask ROM ensures firmware immutability against corruption in harsh EMI environments. |
Use Scenario: Aggregation node collecting data from multiple analog (temperature, pressure) and digital (I²C sensors) in HVAC control panels. IC Role / Device Role / Timing Role: Sensor interface MCU with I²C master capability, 10-bit ADC for analog sensors, and UART for backhaul to central controller. Use Value: Single-chip solution supports up to 26 analog channels and 8 I²C slaves - reduces interconnect complexity and PCB area by consolidating three discrete interface ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F3651MDFC#U0 | Same M16C/65 core, identical pinout and memory map, but uses Flash ROM (512 KB + 4 KB data flash) instead of mask ROM | Enables field firmware updates and prototyping; lacks mask ROM's permanent firmware assurance and lower unit cost at high volume | Select for development or low-to-mid volume where reprogrammability outweighs cost and security requirements |
| R5F3651PNFC#U0 | Same functionality and peripherals, but packaged in 144-pin LQFP (PLQP0144KA-A) with expanded I/O (120 pins) and additional ADC channels (34 ch.) | Suitable for designs requiring more GPIO, higher-resolution sensor fusion, or multi-axis motor control with extra encoder interfaces | Select when >85 I/O or >26 ADC channels are needed; requires PCB redesign due to different footprint and thermal pad layout |
Compared with R5F3651MDFC#U0, the R5F3651MNFC#U0 offers lower unit cost and guaranteed firmware integrity via mask ROM, while R5F3651PNFC#U0 trades pin compatibility for scalability in I/O and analog acquisition - making the R5F3651MNFC#U0 optimal for cost-sensitive, high-volume industrial control with fixed firmware.
Availability
R5F3651MNFC#U0 is available at Aetrix Electronics and suitable for industrial motor control, factory automation PLC modules, and embedded power supply monitors requiring stable component supply over extended product lifecycles.
Supply support for R5F3651MNFC#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 solutions for automotive, industrial, and IoT markets.
The R5F3651MNFC#U0 belongs to the M16C/65 microcontroller family, designed specifically for deterministic real-time control in cost-sensitive industrial equipment where reliability, low interrupt latency, and integrated analog/motor peripherals are critical.
FAQ
What is the maximum operating frequency and supply voltage range for the R5F3651MNFC#U0?
The R5F3651MNFC#U0 operates at a maximum frequency of 32 MHz with a supply voltage range of 3.0 V to 5.5 V. Its minimum instruction execution time is 31.3 ns at 32 MHz, and it supports multiple clock sources including an on-chip oscillator, external crystal, and PLL for flexible system timing design. This makes the R5F3651MNFC#U0 suitable for industrial applications requiring stable performance across wide voltage and temperature ranges.
Does the R5F3651MNFC#U0 include on-chip data flash or EEPROM memory?
No, the R5F3651MNFC#U0 does not include on-chip data flash or EEPROM. It features 512 KB of mask ROM for program storage and 32 KB of RAM for runtime data, but no user-writable nonvolatile memory. Firmware persistence relies entirely on mask ROM, which provides immunity to accidental overwrite or corruption - a key advantage for safety-critical or high-volume industrial deployments where firmware must remain immutable. The R5F3651MNFC#U0 is therefore not suitable for applications requiring field-upgradable code or runtime parameter storage.
How many ADC channels and what resolution does the R5F3651MNFC#U0 support?
The R5F3651MNFC#U0 integrates a 10-bit successive-approximation ADC with 26 input channels and sample-and-hold capability. All 26 channels are accessible via dedicated analog input pins and can be scanned in sequence or triggered by timer events - enabling synchronized sampling for motor current sensing or multi-sensor monitoring. The ADC supports both single-ended and differential input modes, and its conversion time is programmable down to 1.5 µs per channel, making the R5F3651MNFC#U0 well-suited for real-time analog acquisition in industrial control loops.
Is the R5F3651MNFC#U0 pin-compatible with other M16C/65 family members?
Yes, the R5F3651MNFC#U0 is pin-compatible with other 100-pin PLQP0100KB-A packaged M16C/65 devices such as the R5F3651MDFC#U0 and R5F3651PNFC#U0 (though the latter uses a 144-pin package). Its pinout matches the standard M16C/65 100-pin LQFP layout defined in Renesas documentation, including identical placement of power, clock, reset, UART, I²C, and intelligent I/O signals. This allows direct substitution within the same footprint for mask ROM vs. Flash variants - provided firmware and voltage requirements align - simplifying qualification and second-source strategies for the R5F3651MNFC#U0.
What serial communication interfaces are integrated into the R5F3651MNFC#U0?
The R5F3651MNFC#U0 integrates two UART channels for asynchronous serial communication and one I²C-bus interface supporting multi-master operation. It does not include CAN, USB, SPI, or LIN peripherals. The UARTs support standard framing (8N1, 9-bit, parity), baud rate generation via programmable dividers, and FIFO buffering for reliable host communication. The I²C interface operates up to 400 kHz and handles address arbitration and clock stretching - ideal for connecting to temperature sensors, EEPROMs, or display controllers. These interfaces make the R5F3651MNFC#U0 appropriate for industrial HMI, sensor aggregation, and legacy protocol bridging without requiring external bridge ICs.
R5F3651MNFC#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:
- 31K 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:
R5F3651MNFC#U0 FAQ
1.How can I place an order for R5F3651MNFC#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F3651MNFC#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 R5F3651MNFC#U0 reliable?
The price and inventory of R5F3651MNFC#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F3651MNFC#U0 is usually 5 days.
3.What payment methods are accepted for R5F3651MNFC#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F3651MNFC#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F3651MNFC#U0?
R5F3651MNFC#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F3651MNFC#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 R5F3651MNFC#U0?
For technical support, including R5F3651MNFC#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F3651MNFC#U0 requirements.
6.How does Aetrix verify that R5F3651MNFC#U0 is sourced from the original manufacturer or authorized distributors?
All R5F3651MNFC#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 R5F3651MNFC#U0 meets industry standards.
7.What is the process for return or replacement of R5F3651MNFC#U0?
All R5F3651MNFC#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F3651MNFC#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 R5F3651MNFC#U0 part is unused and in its original packaging.
Return procedure for R5F3651MNFC#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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