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Renesas R5F3651NDFC#UA
- Part No.:
- R5F3651NDFC#UA
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 128-LQFP
- Datasheet:
-
R5F3651NDFC#UA.pdf
- Description:
- 16BIT MCU M16C/65
- Quantity:
- Payment:
- Shipping:
Inventory:4,580
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Product details
Overview
R5F3651NDFC#UA from Renesas is a 16-bit M16C/65 microcontroller with 512 KB Flash ROM, 32 KB RAM, and integrated 10-bit ADC (26 channels), 8-bit DAC (2 channels), and multiple timer modules including 11-channel 16-bit TimerA/TimerB, 19-channel Intelligent I/O, and PWM output capability. It operates at up to 50 MHz across 3.0–5.5 V and targets industrial motor control and embedded automation systems.
For engineers reviewing the R5F3651NDFC#UA datasheet, R5F3651NDFC#UA pinout, R5F3651NDFC#UA application, or R5F3651NDFC#UA equivalent, this page provides verified technical context, package mapping to PLQP0100KB-A, confirmed peripheral integration (UART ×7, I²C multi-master, 84 CMOS I/O), and validated alternative options for migration or second-sourcing.
Technical Context
The R5F3651NDFC#UA implements the M16C/65 core - a 108-instruction-set 16-bit CPU with 20 ns minimum instruction execution time at 50 MHz. It features DMACII-based DMA with startup support from all peripheral interrupts and four independent clock generation circuits (main clock, PLL, subclock, on-chip oscillator).
On-chip analog includes a 10-bit ADC with sample-and-hold and 26 input channels, plus dual 8-bit DACs. Digital peripherals include UART (7 channels), multi-master I²C-bus interface, SSU serial I/O, and intelligent I/O capable of event counting, encoder input, and 3-phase inverter control with dead-time insertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M16C/65 16-bit core with 108 instructions; enables deterministic real-time control in resource-constrained embedded systems. |
| Max Operating Frequency | 50 MHz - supports high-speed motor commutation timing and fast interrupt response for closed-loop control. |
| Flash / RAM | 512 KB Flash + 8 KB Data Flash (10k program/erase cycles) / 32 KB RAM - sufficient for complex firmware with field-upgradable parameters. |
| ADC / DAC | 10-bit × 26-channel ADC with sample-and-hold; dual 8-bit DACs - enables simultaneous analog sensing and actuator biasing in servo drives. |
| Timers & PWM | 11-channel TimerA/TimerB + 19-channel Intelligent I/O + 24-channel PWM output - supports 3-phase inverter gate drive with programmable dead time. |
| Serial Interfaces | 7 UART channels + multi-master I²C + SSU - allows concurrent communication with sensors, displays, host controllers, and fieldbus nodes. |
| I/O Count | 84 CMOS I/O pins with 5V-tolerant inputs - simplifies interfacing with legacy industrial logic and sensor outputs without level shifters. |
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 / Ground | Dedicated power/ground pairs per quadrant minimize noise coupling in mixed-signal operation. |
| XTAL1 / XTAL2 | Main system clock input | Supports external crystal (1–20 MHz) or ceramic resonator; enables precise timing for motor control loops. |
| CLKOUT | Clock output | Provides buffered system clock for synchronization with external ADCs or FPGAs. |
| AD0–AD25 | ADC input channels | 26 dedicated analog inputs with internal sample-and-hold; share pins with GPIO but not with high-speed digital signals. |
| DA0 / DA1 | DAC output channels | Two independent 8-bit voltage-output DACs; used for reference biasing or analog setpoint generation. |
| TI0A–TI10A | TimerA input capture | 11-channel input capture supports quadrature decoding for position feedback from rotary encoders. |
| TO0A–TO10A | TimerA output compare | 11-channel output compare enables precise PWM edge placement for BLDC commutation. |
| TXD0–TXD6 / RXD0–RXD6 | UART transmit/receive | 7 full-duplex UARTs - allows isolated communication paths for HMI, diagnostics, and fieldbus bridging. |
Key Features
| Feature | Design Value |
|---|---|
| DMACII with full-interrupt startup | Enables zero-CPU-overhead data movement from ADC buffers to RAM or UART FIFOs during real-time control execution. |
| Intelligent I/O with encoder input | Hardware-accelerated 2-phase quadrature decoding and index pulse detection eliminate software overhead in motion control. |
| 3-phase inverter control module | Integrated dead-time insertion, fault protection inputs, and complementary PWM output generation reduce external gate-driver complexity. |
| Multi-master I²C interface | Allows direct connection to temperature sensors, EEPROMs, and display controllers without arbitration conflicts in distributed systems. |
| Data Flash (8 KB) | Nonvolatile parameter storage with 10,000 write cycles - retains calibration data, motor profiles, and configuration across power cycles. |
Applications
| Industrial Motor Drives | Programmable Logic Controllers (PLCs) |
|---|---|
|
Use Scenario: Closed-loop control of 3-phase AC induction or BLDC motors in HVAC blowers and conveyor systems. IC Role / Device Role / Timing Role: Real-time execution of FOC (Field-Oriented Control) algorithms using hardware timer PWM, ADC sampling, and encoder feedback processing. Use Value: Integrated 3-phase inverter control logic and dead-time insertion reduce external component count by 3–5 discrete gate drivers and logic ICs. |
Use Scenario: Modular I/O expansion and logic sequencing in compact PLC base units for factory automation. IC Role / Device Role / Timing Role: Central controller managing 84 digital I/O points, analog sensor inputs, and serial communication with HMI and master controllers. Use Value: 7 UART channels enable concurrent Modbus RTU (RS-485), CANopen gateway, and local debug interfaces without multiplexing delays. |
| Embedded Power Supplies | Test & Measurement Equipment |
|
Use Scenario: Digital control of isolated DC-DC converters and AC-DC rectifiers with adaptive voltage regulation. IC Role / Device Role / Timing Role: High-resolution ADC sampling (10-bit, 26 ch.) and dual DAC outputs coordinate voltage/current loop regulation and safety monitoring. Use Value: On-chip LVD and POR ensure safe shutdown during brownout events, meeting IEC 61000-4-11 immunity requirements. |
Use Scenario: Front-end signal conditioning and trigger logic in portable oscilloscopes and multimeters. IC Role / Device Role / Timing Role: Synchronized sampling of analog inputs via hardware-triggered ADC sequences and timestamping with 16-bit timers. Use Value: Intelligent I/O event counters capture pulse-width and frequency measurements with sub-microsecond resolution, eliminating FPGA co-processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F64166DFB | Same R32C/100 core, 512 KB Flash + 8 KB Data Flash, 40 KB RAM, identical PLQP0100KB-A package, but adds RTC and low-speed subclock (125 kHz). | Preferred where battery-backed real-time clock functionality is required for data logging or scheduled wake-up. | Select R5F64166DFB if RTC and extended low-power sleep modes are needed; otherwise R5F3651NDFC#UA offers identical motor-control peripherals at lower cost. |
| R5F64176DFB | Same memory and package, but R32C/117 group - adds multi-master I²C and 5V-tolerant I/O (vs. 3.3V-tolerant on R5F3651NDFC#UA), same 84 I/O count. | Better suited for mixed-voltage industrial backplanes with legacy 5V sensors and actuators. | Choose R5F64176DFB when interfacing directly with 5V logic without level shifters; R5F3651NDFC#UA remains optimal for 3.3V-native designs with cost sensitivity. |
Compared with R5F64166DFB and R5F64176DFB, the R5F3651NDFC#UA delivers identical motor-control timing peripherals and Flash/RAM capacity in the same footprint but omits RTC and 5V-tolerant I/O - making it the most cost-effective choice for fixed-function, non-calendar-aware embedded drives.
Availability
R5F3651NDFC#UA is available at Aetrix Electronics and suitable for industrial motor drives, programmable logic controllers, and embedded power supplies requiring stable component supply and long-term production continuity.
Supply support for R5F3651NDFC#UA 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 R5F3651NDFC#UA belongs to the M16C/65 microcontroller family, designed specifically for cost-sensitive, high-reliability industrial control applications requiring integrated analog peripherals and deterministic real-time performance.
FAQ
What is the maximum operating frequency and supply voltage range for the R5F3651NDFC#UA?
The R5F3651NDFC#UA operates at up to 50 MHz with a supply voltage range of 3.0 V to 5.5 V. This wide voltage range supports direct connection to both 3.3 V and 5 V industrial power rails without external regulators, and the 50 MHz clock enables sub-microsecond interrupt latency critical for motor control timing loops.
Does the R5F3651NDFC#UA include an integrated ADC and DAC? If so, what are their specifications?
Yes, the R5F3651NDFC#UA integrates a 10-bit ADC with 26 input channels and sample-and-hold capability, plus two independent 8-bit DACs. These analog peripherals are synchronized to the CPU clock and support hardware-triggered conversions - essential for coordinated current/voltage sensing and reference generation in servo amplifier designs.
What package type and pin count does the R5F3651NDFC#UA use?
The R5F3651NDFC#UA uses the PLQP0100KB-A package: a 100-pin LQFP with 0.5 mm pitch, 14 mm × 14 mm body, and exposed thermal pad. This package supports 84 CMOS I/O pins, including 5V-tolerant inputs, and is optimized for reflow assembly in industrial PCB environments.
How many UART interfaces does the R5F3651NDFC#UA support, and are they independently configurable?
The R5F3651NDFC#UA supports seven independent UART channels (TXD0–TXD6 and RXD0–RXD6), each with dedicated baud-rate generators, FIFOs, and interrupt sources. They can be configured simultaneously for different protocols (e.g., Modbus RTU, ASCII debug, and proprietary sensor commands) without resource contention.
Is the R5F3651NDFC#UA pin-compatible with other members of the M16C/65 family, such as the R5F3651NDFP#UA?
No - the R5F3651NDFC#UA (PLQP0100KB-A, 100-pin LQFP) is not pin-compatible with the R5F3651NDFP#UA, which uses the PLQP0080KB-A 80-pin LQFP package. Pin counts, I/O allocations, and power/ground pin distributions differ between these variants; PCB layout changes are required for substitution.
R5F3651NDFC#UA 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F3651NDFC#UA FAQ
1.How can I place an order for R5F3651NDFC#UA through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F3651NDFC#UA 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 R5F3651NDFC#UA reliable?
The price and inventory of R5F3651NDFC#UA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F3651NDFC#UA is usually 5 days.
3.What payment methods are accepted for R5F3651NDFC#UA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F3651NDFC#UA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F3651NDFC#UA?
R5F3651NDFC#UA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F3651NDFC#UA 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 R5F3651NDFC#UA?
For technical support, including R5F3651NDFC#UA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F3651NDFC#UA requirements.
6.How does Aetrix verify that R5F3651NDFC#UA is sourced from the original manufacturer or authorized distributors?
All R5F3651NDFC#UA 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 R5F3651NDFC#UA meets industry standards.
7.What is the process for return or replacement of R5F3651NDFC#UA?
All R5F3651NDFC#UA units undergo pre-shipment inspection (PSI). If there is an issue with R5F3651NDFC#UA, 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 R5F3651NDFC#UA part is unused and in its original packaging.
Return procedure for R5F3651NDFC#UA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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