TMS320F28066PNT - C2000 Piccolo 32-bit MCU, 90MHz, 256KB Flash, 80-LQFP | Texas Instruments
MPN: TMS320F28066PNT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.45 | $12.45 |
| 10 | $11.21 | $112.10 |
| 100 | $9.85 | $985.00 |
| 500 | $8.78 | $4,390.00 |
| 1,000 | $7.92 | $7,920.00 |
TMS320F28066PNT Overview
What is a microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable peripherals. A 32-bit MCU like the F28066 can address larger memory maps, execute arithmetic in hardware floating-point, and manage complex deterministic control loops within microsecond-scale deadlines. Within TI's taxonomy this part sits as: microcontroller -> 32-bit MCU -> C2000 Piccolo family -> real-time control MCU -> embedded processor.
Key features include an 80-pin LQFP (PN) surface-mount footprint, a 32-bit architecture with hardware FPU and CLA, 256 KB single-voltage flash, and 68 KB total RAM partitioned between the C28x and the CLA. The device supports 3.3 V single-supply operation, on-chip voltage regulation, and TI's enhanced control peripherals including 12-bit and 16-bit ADCs, multiple ePWM modules, eCAP, eQEP, and a CAN/CAN-FD interface for industrial communications.
The C28x core plus CLA architecture enables deterministic parallel task execution: the C28x handles communication, sequencing, and outer control loops while the CLA offloads inner control math such as digital filtering or field-oriented control (FOC) transforms. This dual-core topology is implemented as one silicon die, so software authors can partition interrupt-driven firmware while sharing tightly-coupled memory and event triggers for deterministic sub-microsecond latency.
Typical applications include digital motor control (PMSM, BLDC, AC induction), solar inverters and digital power converters, LED lighting drivers, and industrial sensor/servo drives. The combination of FPU + CLA + enhanced PWM makes this family a popular choice for field-oriented control (FOC) loops where high switching frequency and high sample rate must coexist with safety monitoring and housekeeping tasks on one die.
When designing with this MCU, ensure that the decoupling network follows the TI Piccolo Hardware Design Guide and that unused ADC inputs are biased to mid-supply. JTAG emulation via TI's XDS100/XDS200 is required for development; reserve the TMS, TDI, TDO, TCK, TRSTn, and EMU0/1 pins on the production PCB, not just prototype units.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing a single-page reference for designers evaluating the F28066Pn against alternative C2000 Piccolo parts and competitor MCUs in equivalent 80-pin LQFP footprints.
Drop-in alternatives for TMS320F28066PNT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TMS320F28066UPNT
✅ Drop-In📋 Reference alternative (not in catalog)
TMS320F28069PNT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TMS320F28062PNT
✅ Drop-In📋 Reference alternative (not in catalog)
TMS320F28064PNT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TMS320F28068PNT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TMS320F28066PNT Maximum Ratings & Electrical Characteristics
| Core Architecture | C28x 32-bit RISC |
| Maximum Clock Frequency | 90 MHz |
| On-chip Flash | 256 KB (128K x 16) |
| On-chip RAM | 68 KB total |
| FPU | Single-precision floating-point unit |
| Control Law Accelerator (CLA) | Yes |
| DMA | 6-channel |
| Supply Voltage | 3.3 V single supply |
| ADC | 12-bit and 16-bit options |
| Enhanced PWM (ePWM) Modules | Multiple (Piccolo family standard) |
| Communication Interfaces | CAN/CAN-FD, SPI, I2C, UART |
| Operating Temperature Range | -40C to +125C |
| Package | 80-LQFP (PN) 12x12 mm |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
TMS320F28066PNT 80-lqfp (pn) 12x12 mm Pin Configuration Guide
Pin configuration for TMS320F28066PNT (80-lqfp (pn) 12x12 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for TMS320F28066PNT.
Refer to the datasheet for full pin configuration.
Typical Applications
TMS320F28066PNT is suitable for 6 applications: Digital Motor Control (PMSM/BLDC/AC Induction), Digital Power Conversion (PFC, LLC, Solar Inverter), Industrial Servo Drives and Robotics, LED Lighting Drivers and High-Bay Luminaires, Power Line Communication (PLC) Modems, Automotive Body and Powertrain Auxiliaries.
Digital Motor Control (PMSM/BLDC/AC Induction)
The TMS320F28066PNT's 90 MHz C28x core plus hardware FPU and Control Law Accelerator (CLA) make it a strong fit for digital motor control. In a typical three-phase PMSM drive, the F28066 executes field-oriented control (FOC) at 10-20 kHz PWM with current-loop sampling at the same rate; the CLA handles Clark/Park transforms and SVPWM modulation in parallel while the C28x runs the speed/torque outer loop. The integrated 12-bit ADC (or optional 16-bit ADC in the F2806x family) samples phase currents with sub-microsecond latency, and the ePWM modules generate dead-band-aware complementary outputs for three-phase inverters up to several hundred kHz switching. With 256 KB of flash this MCU can hold both motor-state machine code and a full observer/SMO algorithm without external memory expansion.
Recommended
Digital Power Conversion (PFC, LLC, Solar Inverter)
Solar micro-inverters, PFC boost stages, and LLC resonant converters leverage the F28066PNT to run voltage-mode and average-current-mode control loops. The 90 MHz CPU plus CLA enables peak current-mode control at 100+ kHz switching frequency with cycle-by-cycle current limiting, and the on-chip 16-bit ADC option (where equipped) provides the resolution needed for accurate power metering. The CLA offloads input voltage feed-forward and DPWM calculation so the C28x can manage soft-start, MPPT, and grid-synchronization housekeeping. CAN-FD on this part supports communication with a central inverter controller or battery management system, while 256 KB of flash holds both control firmware and grid-code reference tables for international deployments.
Recommended
Industrial Servo Drives and Robotics
Industrial servo drives use the TMS320F28066PNT as the main control MCU where deterministic eQEP encoder feedback, eCAP high-speed pulse timing, and multi-axis ePWM synchronization are required. The 80-LQFP (PN) package fits an industrial drive PCB alongside power modules and isolated gate drivers, and the 68 KB of on-chip RAM supports multi-axis state buffers without external SRAM. Industrial-grade -40C to +125C operation covers outdoor and cabinet-mounted installations, while the integrated CAN/CAN-FD bus interfaces with the broader EtherCAT or CANopen network typically used in factory automation. The combination of deterministic interrupt response and TI's MotorWare / C2000Ware software library accelerates time-to-market for FOC and trapezoidal commutation implementations.
Recommended
LED Lighting Drivers and High-Bay Luminaires
Commercial LED drivers use the F28066PNT to implement primary-side regulation and constant-current control, especially in dimmable 0-10 V or DALI luminaires. The PICCOLO MCU drives a PFC front stage plus an LLC or flyback DC-DC stage with closed-loop current control at 100 kHz, achieving better than 95 percent efficiency. The CLA executes the constant-current control loop with cycle-by-cycle adjustment, while the C28x runs the DALI or 0-10 V dim interface and thermal foldback logic. The 256 KB flash space accommodates dimming curve tables and firmware-over-the-air (FOTA) bootstrap loaders, and the 80-LQFP package enables single-board integration of the lighting controller with the LED driver stage.
Recommended
Power Line Communication (PLC) Modems
OFDM-based narrowband PLC modems for smart-grid and industrial metering can be built on the TMS320F28066PNT, leveraging its 90 MHz C28x plus CLA for the FFT/orthogonal processing stages. The integrated 12/16-bit ADC samples the PLC line at the required carrier frequency (typically 50-500 kHz), and the ePWM modules drive the line-coupling interface. The CLA offloads preamble detection and FFT magnitude computation while the C28x handles MAC-layer protocol and link management over UART or CAN to a host. The 256 KB flash is sufficient for the OFDM PHY and a 6LoWPAN or PRIME protocol stack.
Recommended
Automotive Body and Powertrain Auxiliaries
Although the F28066PNT is not AEC-Q100 qualified, it is used in automotive development reference designs and off-vehicle lab hardware for body controllers and 48 V mild-hybrid auxiliaries. The C2000 Piccolo family's deterministic interrupt response suits 48 V DC-DC converter control and electric power steering development, while the CLA offloads the inner current loop. In ECU development benches the 80-LQFP (PN) package allows easy socketed prototyping, and the integrated CAN-FD supports modern automotive networking. For production-grade designs the AEC-Q100 variants in the same family (e.g. TMS320F280049C-Q1) would be the appropriate choice; the F28066PNT is best reserved for development or non-safety automotive lab use.
Recommended
Recommended Products Summary
Engineering reference data for TMS320F28066PNT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TMS320F28066UPNT | TMS320F28069PNT | TMS320F28062PNT | TMS320F28064PNT | TMS320F28068PNT |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 80-LQFP (PN) 12x12 mm | 80-LQFP (PN) - same | 80-LQFP (PN) - same | 80-LQFP (PN) - same | 80-LQFP (PN) - same | 80-LQFP (PN) - same |
| Core | C28x 32-bit 90 MHz + FPU + CLA | C28x + FPU + CLA (same silicon) | C28x + FPU + CLA | C28x + FPU (no CLA) | C28x + FPU + CLA | C28x + FPU + CLA + USB |
| Flash | 256 KB | 256 KB | 256 KB | 128 KB | 128 KB | 256 KB |
| RAM | 68 KB | 68 KB | 100 KB | 52 KB | 68 KB | 100 KB |
| CLA | Yes | Yes | Yes | No | Yes | Yes |
| USB | No | No | Yes (USB 2.0 FS) | No | No | Yes (USB 2.0 FS) |
| CAN/CAN-FD | Yes | Yes | Yes | Yes | Yes | Yes |
| Automotive Grade | No | No | No | No | No | No |
Key Differentiators
- Integrated Control Law Accelerator (CLA) - independent from main CPU (vs TMS320F28062PNT)
- Largest flash in the F2806x 80-pin lineup (vs TMS320F28062PNT)
- Drop-in identical silicon in U-variant (Uniflash) (vs TMS320F28066UPNT)
Design Notes
The F2806x family requires a 3.3 V single-supply rail. TI recommends a bulk 22 uF or higher decoupling capacitor near the VDD pins plus a 100 nF X7R bypass on each VDD pin. Decoupling must be placed as close as possible to the package to keep the internal 1.8 V LDO outputs in regulation. The internal POR and BOR circuit requires the supply to ramp within TI's published specification; failure to meet the slew can leave the part in an indeterminate boot state.
Lay out the 80-LQFP (PN) footprint with TI's land-pattern recommendations in the F2806x hardware design guide. Provide a low-impedance ground pour beneath the package thermal pad (if exposed) and place the 32 kHz crystal / resonator traces as short as possible. GPIO and JTAG signal traces should be length-matched if your project routes them across the board, but the most critical layout on this part is keeping the analog and digital supplies physically separated until they reach the package pins.
A common pitfall is to leave the four EMU0/EMU1 JTAG-extension pins floating; they must be pulled to a defined state per the datasheet or the device can falsely enter test mode at startup. Estimate: failing to do so accounts for a non-trivial fraction of 'bricked on power-up' reports. Other pitfalls include forgetting to disable the watchdog timer at startup, omitting the 1.2 V bypass on the VDD18 pin, and ignoring the ADC S+H capacitor selection - the latter causes SNR degradation visible as increased motor current ripple.
Compliance Information
RoHS compliant and lead-free per the TI product page. The F28066PNT is not AEC-Q100 qualified; AEC-Q100 variants in the wider C2000 family exist for safety-relevant automotive designs, but the -PNT suffix indicates the standard industrial grade.
