Texas Instruments TMS320F28235PTPQ

Overview

TMS320F28235PTPQ 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 operating at 12.5 MSPS with 80-ns conversion time. It delivers deterministic control for motor drives, digital power converters, and automotive traction inverters.

For engineers reviewing the TMS320F28235PTPQ datasheet, TMS320F28235PTPQ pinout, TMS320F28235PTPQ application, or TMS320F28235PTPQ equivalent, key selection criteria include its 150-MHz CPU cycle time (6.67 ns), HRPWM resolution (150 ps), eCAN dual-module support, 88 GPIOs with input filtering, and AEC Q100-qualified operation at –40°C to 125°C.

Technical Context

The TMS320F28235PTPQ implements a Harvard bus architecture with unified memory programming model and fast interrupt response via a 58-interrupt PIE block. Its 6-channel DMA controller supports concurrent transfers across ADC, ePWM, McBSP, XINTF, and SARAM.

It integrates six ePWM modules (18 outputs) with high-resolution HRPWM capability (150-ps MEP step), two eQEP interfaces, six eCAP units, dual eCAN controllers, three SCI (UART-compatible), two McBSP/SPI-configurable ports, one SPI, and one I²C interface - all synchronized to a 150-MHz CPU clock and managed by low-power modes (IDLE/STANDBY/HALT).

Key Specifications

Pinout & Package

Package: Thermally Enhanced Low-Profile Quad Flatpack (HLQFP), 176-pin, 24.0 mm × 24.0 mm body size, lead-free/green compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28235PTPQ, the TMS320F28235PTP lacks automotive qualification and extended temperature support, while the TMS320F28335PTPQ adds FPU capability but shares identical packaging, memory map, and peripheral configuration - enabling drop-in replacement where floating-point computation is needed.

Availability

TMS320F28235PTPQ is available at Aetrix Electronics and suitable for automotive traction inverters, industrial servo drives, and grid-tied solar inverters requiring stable component supply across extended temperature and long production lifecycles.

Supply support for TMS320F28235PTPQ 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 broad industrial and automotive design expertise.

The TMS320F28235PTPQ belongs to TI's C2000™ real-time microcontroller product line, engineered specifically for deterministic closed-loop control in motor drives, digital power, and electrified transportation systems.

FAQ

What is the maximum CPU clock frequency supported by the TMS320F28235PTPQ?

The TMS320F28235PTPQ operates at up to 150 MHz, delivering a 6.67-ns instruction cycle time. This frequency is achieved using the on-chip PLL with an external crystal (1–20 MHz) or clock source. The device maintains this speed across its full qualified temperature range of –40°C to 125°C, as verified in TI's SPRS439Q datasheet Section 7.4.

Does the TMS320F28235PTPQ include a hardware floating-point unit (FPU)?

No, the TMS320F28235PTPQ does not include a hardware floating-point unit. Unlike the F2833x series, the F2823x family (including TMS320F28235PTPQ) uses fixed-point C28x CPU only. Floating-point operations must be implemented in software or via library functions - a key differentiator confirmed in Table 5-2 of the SPRS439Q datasheet.

What package type and pin count does the TMS320F28235PTPQ use?

The TMS320F28235PTPQ uses a 176-pin Thermally Enhanced Low-Profile Quad Flatpack (HLQFP) package, designated "PTP" in TI's nomenclature. Its body size is 24.0 mm × 24.0 mm, and it is lead-free and RoHS-compliant. This matches the mechanical specifications listed in TI's SPRS439Q Package Information section.

How many PWM outputs does the TMS320F28235PTPQ support, and what is their resolution?

The TMS320F28235PTPQ supports up to 18 ePWM outputs across six modules, with six channels offering high-resolution capability (HRPWM) at 150-ps minimum pulse width resolution. This enables precise dead-time control and fine-grained modulation essential for SiC and GaN-based power stages, as documented in Section 1 Features and Figure 3-1 of SPRS439Q.

Is the TMS320F28235PTPQ qualified for automotive applications?

Yes, the TMS320F28235PTPQ is AEC Q100-qualified for automotive applications. The "Q" suffix denotes qualification to Grade 1 (–40°C to 125°C), and the device is explicitly listed in TI's F2823x Device Comparison table (Table 5-2) under Q-grade temperature options for PTP and ZJZ packages.