Texas Instruments F28M35M52C1RFPT

Overview

F28M35M52C1RFPT from Texas Instruments is a dual-core Concerto™ microcontroller integrating an Arm® Cortex®-M3 master subsystem (75 MHz) and a TMS320C28x real-time control subsystem (75 MHz), with 512KB flash (ECC), 32KB RAM (ECC/parity), 64KB shared RAM, dual 12-bit ADCs (2.88 MSPS, 20 channels), six comparators with integrated DACs, and dual CAN interfaces. It targets high-precision industrial motor drives and solar inverters requiring synchronized communication and deterministic control.

For engineers reviewing the F28M35M52C1RFPT datasheet, F28M35M52C1RFPT pinout, F28M35M52C1RFPT application, or F28M35M52C1RFPT equivalent, this page delivers verified core speeds, memory partitioning, analog subsystem specs, IPC architecture, and thermal package details essential for safety-critical embedded design validation and BOM selection.

Technical Context

The F28M35M52C1RFPT implements a tightly coupled dual-core architecture where the Cortex-M3 handles Ethernet 1588, USB OTG + PHY, and five UARTs, while the C28x executes real-time PWM generation (9 ePWM modules, 18 outputs), encoder capture (3 eQEP), and floating-point math via integrated FPU and VCU. Interprocessor communication uses 32 handshaking channels and dedicated 2KB message RAMs.

Its analog subsystem features two independent 12-bit ADCs with four sample-and-hold circuits, enabling simultaneous sampling across 20 total channels. Clocking supports dynamic PLL ratio changes, and voltage domains are segregated: 1.2-V digital, 1.8-V analog, and 3.3-V I/O - all managed by on-chip regulators.

Key Specifications

Pinout & Package

144-pin RFP PowerPAD™ Thermally Enhanced Thin Quad Flatpack (HTQFP), 20.0 mm × 20.0 mm body size, with exposed thermal pad soldered to PCB ground plane for optimal thermal conduction and digital grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with F28M35H52CRFP, F28M35M52C1RFPT trades Cortex-M3 bandwidth for lower power and cost while retaining full real-time control capability; versus F28M35M22CRFP, it adds critical communication peripherals needed for smart inverter telemetry and remote firmware updates.

Availability

F28M35M52C1RFPT is available at Aetrix Electronics and suitable for AC drive control modules, servo drive control modules, and string inverters requiring stable component supply, long-term industrial lifecycle support, and traceable sourcing for safety-certified production.

Supply support for F28M35M52C1RFPT 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 communications markets.

The F28M35x Concerto™ family was designed to unify communication and real-time control in single-chip solutions for solar inverters, motor drives, and industrial automation systems requiring functional safety and deterministic performance.

FAQ

What is the maximum operating frequency of the Cortex-M3 core in the F28M35M52C1RFPT?

The Cortex-M3 core in the F28M35M52C1RFPT operates at a maximum of 75 MHz. This speed is constrained by the clock divider relationship with the C28x core: when the C28x runs at its rated 75 MHz, the Cortex-M3 can be configured for 75 MHz (1:1 divider). The device does not support 100 MHz Cortex-M3 operation like the F28M35H52C variant. This frequency enables full utilization of USB OTG, five UARTs, and 10/100 ENET 1588 MII without timing violations.

Does the F28M35M52C1RFPT include hardware error correction for memory?

Yes, the F28M35M52C1RFPT includes Error Correction Code (ECC) protection for 512 KB of flash memory and 16 KB of C28x L0/L1 RAM, plus parity protection for 16 KB of C28x L2/L3 RAM and 64 KB of shared RAM. ECC detects and corrects single-bit errors and detects double-bit errors in flash and critical RAM blocks, supporting IEC 61508 SIL-2 and ISO 26262 ASIL-B system-level safety certification efforts.

How many analog-to-digital converter channels does the F28M35M52C1RFPT support?

The F28M35M52C1RFPT supports 20 total ADC input channels - 10 per 12-bit ADC module (ADC1 and ADC2). Each module includes two sample-and-hold circuits, enabling simultaneous sampling across multiple channels. The aggregate sampling rate is 2.88 MSPS, with a minimum conversion time of 347 ns per sample, making it suitable for high-fidelity current/voltage sensing in three-phase motor control and inverter applications.

What package type and thermal characteristics does the F28M35M52C1RFPT use?

The F28M35M52C1RFPT uses a 144-pin RFP PowerPAD™ HTQFP package (20.0 mm × 20.0 mm) with an exposed thermal pad. The pad must be soldered directly to the PCB's ground plane to provide both thermal conduction and digital grounding. Thermal resistance (θ_JA) is specified at 22.5°C/W under JEDEC JESD51-7 conditions, enabling reliable operation at 75 MHz junction temperatures up to 105°C without forced airflow.

Can the F28M35M52C1RFPT support functional safety certification?

Yes, the F28M35M52C1RFPT includes multiple hardware safety features required for functional safety compliance: ECC/parity memory protection, dual watchdog timers (one per core), NMI watchdog for clock loss detection, critical register lock protection, and documentation supporting IEC 61508 and ISO 26262 development workflows. Texas Instruments provides safety manuals and FMEDA reports specifically for the F28M35M52C1RFPT to accelerate system-level certification.