Texas Instruments TMS320F28333PGFA

Overview

TMS320F28333PGFA from Texas Instruments is a 100-MHz C2000™ real-time microcontroller with IEEE 754 single-precision FPU, 256K × 16 flash, 34K × 16 SARAM, and 12-bit 16-channel ADC (80-ns conversion). It delivers deterministic control for motor drives and digital power inverters, supporting ePWM, HRPWM (150-ps MEP), eCAP, eQEP, dual CAN, three SCI, two McBSP, SPI, and I²C.

For engineers reviewing the TMS320F28333PGFA datasheet, TMS320F28333PGFA pinout, TMS320F28333PGFA application, or TMS320F28333PGFA equivalent, key selection criteria include 100-MHz CPU timing, FPU-enabled control law execution, 176-pin LQFP package compatibility, and industrial temperature range (–40°C to 85°C) operation.

Technical Context

The TMS320F28333PGFA implements a Harvard-architecture 32-bit C28x CPU with unified memory model and fast interrupt response, enabling sub-microsecond loop closure in closed-loop motor control. Its six-channel DMA offloads ADC, ePWM, and XINTF data movement, while the PIE block manages 58 peripheral interrupts with low-latency dispatching.

On-chip peripherals include six ePWM modules (18 outputs total), six HRPWM channels with 150-ps resolution, six eCAP inputs, two eQEP interfaces, and a 12.5-MSPS 12-bit ADC with dual 8-channel MUX and dual sample-and-hold - all synchronized to the 100-MHz system clock for precise timing-critical actuation.

Key Specifications

Pinout & Package

Package: 176-pin Low-Profile Quad Flatpack (LQFP), 24.0 mm × 24.0 mm body, 0.5-mm pitch, RoHS-compliant lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28335PGFA, the TMS320F28333PGFA trades 50 MHz of CPU headroom for identical feature parity and flash size, while TMS320F28334PGFA offers 150-MHz speed at half the flash capacity - making the TMS320F28333PGFA optimal for balanced performance, memory, and thermal design in industrial motor drives.

Availability

TMS320F28333PGFA is available at Aetrix Electronics and suitable for industrial motor drives, solar string inverters, and traction inverter control requiring stable component supply across extended product lifecycles.

Supply support for TMS320F28333PGFA 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 leader specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and consumer markets.

The TMS320F28333PGFA belongs to TI's C2000™ real-time microcontroller product line, engineered specifically for high-precision closed-loop control in motor drives, digital power, and renewable energy systems.

FAQ

What is the maximum operating frequency of the TMS320F28333PGFA?

The TMS320F28333PGFA operates at a maximum CPU frequency of 100 MHz, corresponding to a 10-ns instruction cycle time. This speed is guaranteed under recommended operating conditions (1.9-V core, –40°C to 85°C ambient), and the device uses an on-chip PLL to generate the system clock from an external crystal or oscillator source. The TMS320F28333PGFA does not support 150-MHz operation - that capability is exclusive to the F28335 and F28334 variants.

Does the TMS320F28333PGFA include a floating-point unit?

Yes, the TMS320F28333PGFA integrates a full IEEE 754 single-precision floating-point unit (FPU) as part of its C28x CPU core. This FPU enables native execution of floating-point arithmetic without software emulation, significantly accelerating control algorithms such as Park/Clarke transforms, trigonometric functions, and adaptive observers in motor control applications. The FPU is identical across all F2833x devices including the TMS320F28333PGFA.

What memory resources are available on the TMS320F28333PGFA?

The TMS320F28333PGFA provides 256K × 16 bits of on-chip flash memory for program storage and 34K × 16 bits of single-access RAM (SARAM) for zero-wait-state data and stack operations. It also includes 1K × 16 bits of one-time-programmable (OTP) ROM and an 8K × 16 bits boot ROM containing standard math tables and boot-mode selection logic. All memory blocks are protected by the 128-bit code security module.

Which communication interfaces does the TMS320F28333PGFA support?

The TMS320F28333PGFA supports two enhanced CAN (eCAN) modules, three SCI (UART-compatible) ports, two McBSP modules (configurable as SPI), one dedicated SPI module, and one I²C bus interface. These peripherals are accessible via multiplexed GPIO pins and managed through the 58-interrupt PIE block. All interfaces operate natively at the 100-MHz system clock domain and support DMA-accelerated data transfers.

What is the ADC specification of the TMS320F28333PGFA?

The TMS320F28333PGFA integrates a 12-bit analog-to-digital converter with 16 input channels, 12.5 MSPS throughput, and 80-ns conversion time. It features two independent 8-channel input multiplexers, dual sample-and-hold circuits, and support for both single and simultaneous conversions. The ADC accepts either internal or external 3.3-V reference voltage and is synchronized to PWM events via ADCSOC triggers for precise timing-critical sampling.