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Texas Instruments TMS320F28066PNT
- Part No.:
- TMS320F28066PNT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
TMS320F28066PNT.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,356
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Product details
Overview
TMS320F28066PNT from Texas Instruments is a 90-MHz C28x-core real-time microcontroller with integrated FPU, CLA, and advanced motor control peripherals including 16 ePWM channels (8 HRPWM-capable), 3 eCAP modules, 4 HRCAP modules, 2 eQEP modules, and a 12-bit 3.46-MSPS ADC - deployed in industrial motor drives, solar inverters, and EV charging power stages.
For engineers reviewing the TMS320F28066PNT datasheet, TMS320F28066PNT pinout, TMS320F28066PNT application, or TMS320F28066PNT equivalent, key selection criteria include its 80-pin LQFP package, 64KB flash/50KB RAM memory configuration, single 3.3-V supply operation, -40°C to 105°C temperature range, and USB 2.0 host/device support per device comparison table.
Technical Context
The TMS320F28066PNT implements a Harvard-architecture C28x CPU with atomic instructions and unified memory mapping, coupled with a dedicated 32-bit floating-point CLA that executes control law code independently of the main CPU. Its VCU extends instruction set for complex math, CRC, and Viterbi operations.
Peripheral integration includes dual-sample-and-hold ADC with ratio-metric reference support, analog comparators with internal 10-bit references routed directly to ePWM trip zones, and enhanced HRPWM with dual-edge modulation capability - all optimized for deterministic closed-loop timing in real-time power conversion systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | C28x 32-bit fixed/floating-point core running at 90 MHz (11.11-ns cycle time) |
| Memory | 64KB on-chip flash (16-bit word), 50KB SARAM (34KB dual-access), 1KB OTP ROM |
| ADC | 12-bit dual sample-and-hold with 3.46 MSPS throughput and 16-channel input multiplexing |
| ePWM | 8 modules generating 16 PWM outputs, 8 supporting high-resolution (HRPWM) dual-edge modulation |
| Package | 80-pin LQFP (PN), 12.0 mm × 12.0 mm body, rated for –40°C to 105°C (T grade) |
| USB Interface | Full-speed USB 2.0 device/host mode with DMA-accessible controller (confirmed in Device Comparison Table) |
| Security | 128-bit password-protected code security module locking flash, SARAM, and OTP memory blocks |
Pinout & Package
Package: 80-pin Low-Profile Quad Flatpack (LQFP), PN variant, 12.0 mm × 12.0 mm body size, thermally enhanced with exposed pad (PowerPAD™) requiring PCB ground plane connection for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GPIO0–GPIO54 | Programmable I/O with peripheral multiplexing | 54 pins support configurable functions including EPWMxA/B, ECAPx, EQEPx, SPI, SCI, I²C, CAN, USB, and analog inputs |
| VDD / VSS / VDDIO / VDDA / VSSA | Power and ground domains | Separate analog (VDDA/VSSA), I/O (VDDIO), and core (VDD/VSS) supplies enable noise isolation for ADC and PWM timing |
| ADCINA0–ADCINA7, ADCINB0–ADCINB7 | Analog input channels | 16 total ADC inputs (dual bank A/B), with VREFHI/VREFLO ratio-metric reference support for accurate voltage/current sensing |
| X1 / X2 | Crystal oscillator terminals | Support external crystal (1–20 MHz) or external clock source; internal oscillators eliminate need for external crystal in many designs |
| USB0DP / USB0DM | USB differential data pair | Full-speed USB 2.0 interface with integrated transceiver; requires external 1.5-kΩ pull-up on DP for device enumeration |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Control Law Accelerator (CLA) | Dedicated 32-bit floating-point accelerator executing independent control loops without CPU intervention, reducing latency in servo and PFC applications |
| High-Resolution PWM (HRPWM) | 8 channels supporting sub-nanosecond duty-cycle resolution via digital window comparator and fine-phase adjustment, enabling >1-MHz switching in GaN/SiC designs |
| Analog Comparators with DACs | 3 integrated comparators each with programmable 10-bit DAC reference, directly connected to ePWM trip-zone logic for fast overcurrent protection |
| Viterbi/CRC/Complex Math Unit (VCU) | Hardware acceleration for CRC-16/32, complex multiply, and Viterbi decoding - critical for communication-integrated motor control and grid-synchronization algorithms |
| Single 3.3-V Supply Operation | No external power sequencing required; internal regulator generates all internal voltages, simplifying board design and reducing BOM cost |
Applications
| Industrial Motor Drives | Solar Inverters |
|---|---|
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase PMSM/BLDC motors in HVAC compressors and pump drives. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm (current/voltage loop), PWM generation with <100-ns dead-time control, and ADC sampling synchronized to PWM zero-crossings. Use Value: 90-MHz C28x + CLA enables dual-loop FOC at >20-kHz update rate; HRPWM supports SiC/GaN switching up to 250 kHz with precise phase alignment. | Use Scenario: MPPT and grid-synchronization in string-level photovoltaic inverters with reactive power support. IC Role / Device Role / Timing Role: Simultaneous execution of MPPT (P&O or incremental conductance), PLL-based grid sync, and DC-link voltage regulation using CLA and C28x cores. Use Value: Dual 12-bit ADC banks allow concurrent sampling of DC input and AC output; VCU accelerates grid harmonic analysis and reactive power calculation. |
| EV Charging Power Modules | Energy Storage PCS |
Use Scenario: Bi-directional AC/DC and DC/DC conversion in on-board chargers (OBC) and wireless vehicle charging systems. IC Role / Device Role / Timing Role: Coordinating interleaved PFC, isolated DC/DC, and battery-side LLC control with precise timing across multiple power stages. Use Value: 6-channel DMA enables zero-overhead data movement between ADC, PWM, and CLA; USB 2.0 supports firmware updates and diagnostics during vehicle service. | Use Scenario: High-efficiency bi-directional power conversion in residential/commercial battery energy storage systems (BESS). IC Role / Device Role / Timing Role: Managing DC-link voltage, battery SOC balancing, grid export/import limits, and anti-islanding detection with deterministic response. Use Value: On-chip temperature sensor and analog comparators provide hardware-level thermal and overvoltage fault response (<1 µs); 128-bit security protects firmware against tampering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar real-time motor control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMS320F28069PNT | 128KB flash, 50KB RAM, VCU and CLA enabled, 100-pin LQFP option available | Higher memory capacity supports larger control algorithms and communication stacks (e.g., CAN FD, Modbus TCP) | Select when extended flash/RAM or 100-pin routing flexibility is required; identical peripheral set and CLA/FPU architecture. |
| TMS320F280049PNT | Newer generation with CLB, enhanced ADC (16-bit, 4-MSPS), and improved HRPWM resolution; 100-pin LQFP only | Supports next-gen SiC/GaN topologies requiring higher precision timing and configurable logic for custom protection schemes | Select for new designs targeting roadmap continuity; requires migration effort but offers superior analog performance and configurability. |
Compared with TMS320F28069PNT, the TMS320F28066PNT provides identical real-time control capability in a cost-optimized 80-pin LQFP with reduced flash (64KB), while the TMS320F280049PNT delivers generational improvements in ADC resolution, PWM granularity, and logic flexibility - making it suitable for higher-performance BESS and fast-charging OBC designs.
Availability
TMS320F28066PNT is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, and EV charging power modules requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for TMS320F28066PNT 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets.
The TMS320F28066PNT belongs to TI's C2000™ real-time microcontroller product line, engineered specifically for deterministic closed-loop control in power electronics - emphasizing high-precision PWM, fast analog acquisition, and hardware-accelerated math for motor, power, and energy systems.
FAQ
What is the maximum operating frequency of the TMS320F28066PNT?
The TMS320F28066PNT operates at a maximum CPU frequency of 90 MHz, corresponding to an 11.11-ns instruction cycle time. This speed is achieved using the internal PLL with either an external crystal (X1/X2) or one of the two internal zero-pin oscillators, and is fully supported across its specified temperature range of –40°C to 105°C.
Does the TMS320F28066PNT include a floating-point unit (FPU)?
Yes, the TMS320F28066PNT integrates a native single-precision floating-point unit (FPU) as part of its C28x CPU core. This enables efficient execution of floating-point arithmetic in C/C++ without software emulation, significantly accelerating control law computation, trigonometric functions, and coordinate transformations in motor control applications.
How much on-chip flash memory does the TMS320F28066PNT have?
The TMS320F28066PNT contains 64KB of on-chip flash memory organized as 16-bit words. This flash is divided into eight equal sectors, supports secure code protection via the 128-bit CSM module, and includes features such as erase suspend/resume and error correction for robust field firmware updates.
Is USB functionality available on the TMS320F28066PNT?
Yes, the TMS320F28066PNT includes a full-speed USB 2.0 controller supporting both device and host modes. It features integrated transceivers (USB0DP/USB0DM pins), DMA accessibility, and is confirmed in the Device Comparison Table as present on all F2806xU/M/F variants - the TMS320F28066PNT is an "F" variant and therefore includes USB.
What package type and pin count does the TMS320F28066PNT use?
The TMS320F28066PNT uses an 80-pin Low-Profile Quad Flatpack (LQFP) package, designated as "PN" in TI documentation, with a 12.0 mm × 12.0 mm body size and exposed thermal pad (PowerPAD™). It is rated for industrial temperature range (–40°C to 105°C) and requires PCB-level grounding of the PowerPAD for thermal compliance.
TMS320F28066PNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 80-LQFP
- Series:
- C2000™ C28x Piccolo™
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- C28x
- Core Size:
- 32-Bit Single-Core
- Speed:
- 90MHz
- Connectivity:
- CANbus, I2C, McBSP, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 40
- Program Memory Size:
- 256KB (128K x 16)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 34K x 16
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 1.995V
- Data Converters:
- A/D 12x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
TMS320F28066PNT FAQ
1.How can I place an order for TMS320F28066PNT through Aetrix?
Please submit a Request for Quotation (RFQ) for TMS320F28066PNT 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 TMS320F28066PNT reliable?
The price and inventory of TMS320F28066PNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMS320F28066PNT is usually 5 days.
3.What payment methods are accepted for TMS320F28066PNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMS320F28066PNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMS320F28066PNT?
TMS320F28066PNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMS320F28066PNT 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 TMS320F28066PNT?
For technical support, including TMS320F28066PNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMS320F28066PNT requirements.
6.How does Aetrix verify that TMS320F28066PNT is sourced from the original manufacturer or authorized distributors?
All TMS320F28066PNT 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 TMS320F28066PNT meets industry standards.
7.What is the process for return or replacement of TMS320F28066PNT?
All TMS320F28066PNT units undergo pre-shipment inspection (PSI). If there is an issue with TMS320F28066PNT, 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 TMS320F28066PNT part is unused and in its original packaging.
Return procedure for TMS320F28066PNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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