Texas Instruments TMX320F28235PGFA

Overview

TMS320F28235PGFA from Texas Instruments is a 150-MHz C28x 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, digital power converters, and industrial inverters using ePWM, HRPWM (150-ps MEP), eCAP, and eQEP peripherals.

For engineers reviewing the TMS320F28235PGFA datasheet, TMS320F28235PGFA pinout, TMS320F28235PGFA application, or TMS320F28235PGFA equivalent, this page provides verified package mapping (176-pin LQFP PGF), confirmed peripheral count (2×CAN, 3×SCI, 2×McBSP, 1×I2C, 1×SPI), memory layout, security features (128-bit key), and thermal rating (–40°C to 85°C).

Technical Context

The TMS320F28235PGFA implements a Harvard-architecture 32-bit C28x CPU with unified memory model and fast interrupt response. Its six-channel DMA supports concurrent transfers across ADC, ePWM, McBSP, XINTF, and SARAM - enabling high-throughput real-time data movement without CPU intervention.

It integrates dual 32-bit QEP modules, six eCAP units, and six ePWM modules with auxiliary HRPWM outputs. The on-chip 12-bit ADC uses two sample-and-hold circuits and dual 8-channel multiplexers for simultaneous sampling of up to 16 analog inputs at 12.5 MSPS.

Key Specifications

Pinout & Package

Package: 176-pin Low-Profile Quad Flatpack (LQFP), body size 24.0 mm × 24.0 mm, lead-free green packaging, temperature grade A (–40°C to 85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28235PGFA, the TMS320F28335PGFA adds hardware floating-point acceleration for computationally intensive control, while the TMS320F28234PGFA reduces flash capacity and removes FPU to lower unit cost - both retain identical I/O, timing, and safety architecture.

Availability

TMS320F28235PGFA is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, and digital power supplies requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability.

Supply support for TMS320F28235PGFA 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 with over 90 years of innovation in industrial and automotive electronics.

The TMS320F28235PGFA belongs to TI's C2000™ real-time microcontroller family, engineered specifically for closed-loop control in power electronics, motor drives, and energy systems - emphasizing deterministic timing, analog integration, and functional safety readiness.

FAQ

What is the maximum operating frequency of the TMS320F28235PGFA?

The TMS320F28235PGFA operates at up to 150 MHz (6.67-ns cycle time) at 1.9-V core voltage. At 1.8-V core, it supports 100 MHz operation. This frequency governs instruction execution, PWM resolution, and ADC sampling rate - directly impacting control loop bandwidth in applications like servo drives and digital power converters. The TMS320F28235PGFA achieves this via an integrated PLL fed by an external crystal or clock source.

Does the TMS320F28235PGFA include a floating-point unit (FPU)?

No, the TMS320F28235PGFA does not include a hardware floating-point unit. Unlike the F2833x series, the F2823x family uses a fixed-point C28x CPU only. All mathematical operations - including trigonometric functions required for field-oriented control - must be implemented in fixed-point arithmetic or via software libraries. The TMS320F28235PGFA relies on optimized IQmath libraries for efficient computation without FPU acceleration.

What package type and pin count does the TMS320F28235PGFA use?

The TMS320F28235PGFA uses a 176-pin Low-Profile Quad Flatpack (LQFP) package designated "PGF" with body dimensions of 24.0 mm × 24.0 mm. It is lead-free and RoHS-compliant. This package is mechanically and electrically identical to other PGF variants in the F2823x and F2833x families, enabling drop-in replacement where peripheral and memory requirements align - such as with TMS320F28335PGFA or TMS320F28234PGFA.

How much on-chip memory does the TMS320F28235PGFA provide?

The TMS320F28235PGFA integrates 256K × 16 bits of on-chip flash memory (organized in eight sectors), 34K × 16 bits of single-access RAM (SARAM), 1K × 16 bits of one-time-programmable (OTP) ROM, and an 8K × 16-bit boot ROM. This memory configuration supports large control algorithms, dual-bank firmware updates, and secure bootloader storage - essential for industrial systems requiring field-upgradable and tamper-resistant firmware deployment.

Which communication interfaces are available on the TMS320F28235PGFA?

The TMS320F28235PGFA includes two enhanced CAN (eCAN) modules (32 message objects each), three UART-compatible SCI modules, two McBSP modules (configurable as SPI), one dedicated SPI module, and one I²C bus interface. These interfaces support robust industrial networking (CAN), debug and telemetry (SCI), external sensor/actuator interfacing (SPI/I²C), and audio or codec connectivity (McBSP) - all accessible through its 88 multiplexed GPIO pins with configurable pull-ups and filtering.