Texas Instruments TMS320F28066UPZT

Overview

TMS320F28066UPZT 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, 4 HRCAP, 2 eQEP, and a 12-bit 3.46-MSPS ADC - deployed in industrial inverters, solar power optimizers, and servo drive control modules.

For engineers reviewing the TMS320F28066UPZT datasheet, TMS320F28066UPZT pinout, TMS320F28066UPZT application, or TMS320F28066UPZT equivalent, key selection criteria include HRPWM dual-edge modulation capability, on-chip VCU for CRC/Viterbi acceleration, 54 GPIO with input filtering, USB 2.0 device/host support, and 128KB flash with 1KB OTP for firmware security.

Technical Context

The TMS320F28066UPZT implements a Harvard-architecture C28x CPU with atomic instructions and unified memory mapping, paired with a dedicated 32-bit floating-point CLA that executes control law code independently of the main CPU. Its peripheral set is optimized for closed-loop timing-critical applications, featuring dual-sample-and-hold ADC with ratio-metric reference support and analog comparators routed directly to ePWM trip zones.

It integrates two zero-pin oscillators, PLL-based clock synthesis, and missing-clock detection for robust system timing. The device supports IEEE 1149.1 JTAG boundary scan and includes three 32-bit CPU timers, PIE interrupt expansion, and DMA-accessible peripherals - enabling deterministic real-time response in motor phase current sampling and PWM update cycles.

Key Specifications

Pinout & Package

Package: 100-pin PowerPAD™ Thermally Enhanced Thin Quad Flatpack (HTQFP), PZP variant. Exposed thermal pad must be soldered to PCB ground plane using thermal vias for effective heat dissipation; pad is not electrically connected to internal VSS.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar real-time motor control applications.

Compared with TMS320F28066UPZT, the TMS320F28069PZP adds VCU for embedded communications integrity, while the TMS320F280049PZT provides CLB-based hardware customization and higher analog performance - both retain code compatibility but require layout changes due to differing pinouts and thermal pad requirements.

Availability

TMS320F28066UPZT is available at Aetrix Electronics and suitable for industrial inverter control, solar power optimizer design, and servo drive development requiring stable component supply across extended production lifecycles.

Supply support for TMS320F28066UPZT 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 delivering analog and embedded processing solutions for industrial, automotive, and consumer applications.

The TMS320F28066UPZT belongs to TI's C2000™ real-time MCU family, designed specifically for closed-loop control in power electronics - emphasizing deterministic timing, analog integration, and computational acceleration for motor, power, and energy systems.

FAQ

What is the maximum operating frequency of the TMS320F28066UPZT?

The TMS320F28066UPZT operates at a maximum CPU frequency of 90 MHz, corresponding to an instruction cycle time of 11.11 ns. This speed is achieved using the internal PLL with either the on-chip zero-pin oscillators or an external crystal/clock source. All timing-critical peripherals - including ePWM, ADC, and CLA - are fully synchronized to this clock domain, ensuring deterministic real-time behavior in motor control loops.

Does the TMS320F28066UPZT support USB functionality?

Yes, the TMS320F28066UPZT includes a full-speed USB 2.0 interface supporting both device and host modes. It features integrated PHY circuitry and DMA-accessible endpoints. For device mode, a 1.5-kΩ pull-up resistor on USB0DP is required. The USB module is accessible via the dedicated USB0DP/USB0DM pins and supports CDC, HID, and mass storage class implementations out of the box with TI's C2000 USB library.

How many high-resolution PWM channels does the TMS320F28066UPZT provide?

The TMS320F28066UPZT provides 8 high-resolution PWM (HRPWM) channels, part of its total 16 ePWM outputs. Each HRPWM channel supports 150-ps resolution for fine edge placement - essential for precise dead-time control and frequency modulation in resonant converters and high-frequency inverters. These channels are distributed across ePWM modules 1–8 and can be configured independently with asymmetric duty cycles.

What analog peripherals are integrated into the TMS320F28066UPZT?

The TMS320F28066UPZT integrates a 12-bit, 3.46-MSPS ADC with dual sample-and-hold, 16 input channels, and ratio-metric VREFHI/VREFLO referencing. It also includes three analog comparators with integrated 10-bit DACs, whose outputs can be directly routed to ePWM trip-zone inputs for fast overcurrent protection. An on-chip temperature sensor provides die temperature monitoring without external components.

Is the TMS320F28066UPZT pin-compatible with other F2806x devices?

No, the TMS320F28066UPZT is not universally pin-compatible across the F2806x family. While it shares the 100-pin PZP HTQFP package with TMS320F28069PZP and TMS320F28067PZP, functional pin assignments differ - especially for USB, HRCAP, and certain eQEP signals. Pin diagrams confirm unique mappings for USB0DP/USB0DM and HRCAP1–HRCAP4. Layout reuse requires verification against the specific TMS320F28066UPZT pinout table in SPRS698J.