TMS320F28065UPNT Equivalent & Substitute Parts

Part Overview

The TMS320F28065UPNT is a C28x C2000™ C28x Piccolo™ Microcontroller IC featuring 32-bit single-core architecture operating at 90MHz with 128KB FLASH memory. This device is classified as obsolete, necessitating identification of active alternative components for new designs and production continuity. The substitute part maintains core functional equivalence while offering enhanced package options and improved compliance status.

Key Parameters

Parameter	Value
Core Processor	C28x
Core Size	32-Bit Single-Core
Speed	90MHz
Program Memory Size	128KB (64K x 16)
Program Memory Type	FLASH
RAM Size	50K x 16
Voltage Supply (Vcc/Vdd)	1.71V ~ 1.995V
Connectivity	CANbus, I2C, McBSP, SCI, SPI, UART/USART, USB
Peripherals	Brown-out Detect/Reset, DMA, POR, PWM, WDT
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 125°C (TA)

Substitute Part Grouping Explanation

The TMS320F28065UPZT qualifies as a direct substitute based on the following critical parameters:

Functional Equivalence Parameters:

Identical core processor architecture (C28x)
Matching core size (32-Bit Single-Core)
Identical operating speed (90MHz)
Identical program memory capacity (128KB FLASH)
Identical RAM configuration (50K x 16)
Identical supply voltage range (1.71V ~ 1.995V)
Identical connectivity interfaces (CANbus, I2C, McBSP, SCI, SPI, UART/USART, USB)
Identical peripheral feature set (Brown-out Detect/Reset, DMA, POR, PWM, WDT)

Package Differentiation: The substitute part utilizes a 100-LQFP (14x14) package versus the original 80-LQFP (12x12) package, resulting in increased I/O pin count (54 pins versus 40 pins). This package change provides additional I/O flexibility while maintaining full software and functional compatibility.

Parameter Comparison

Parameter	TMS320F28065UPNT	TMS320F28065UPZT
Manufacturer	Texas Instruments	Texas Instruments
Series	C2000™ C28x Piccolo™	C2000™ C28x Piccolo™
Core Processor	C28x	C28x
Core Size	32-Bit Single-Core	32-Bit Single-Core
Speed	90MHz	90MHz
Program Memory Size	128KB (64K x 16)	128KB (64K x 16)
Program Memory Type	FLASH	FLASH
RAM Size	50K x 16	50K x 16
Voltage Supply (Vcc/Vdd)	1.71V ~ 1.995V	1.71V ~ 1.995V
Connectivity	CANbus, I2C, McBSP, SCI, SPI, UART/USART, USB	CANbus, I2C, McBSP, SCI, SPI, UART/USART, USB
Peripherals	Brown-out Detect/Reset, DMA, POR, PWM, WDT	Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number of I/O	40	54
Data Converters	A/D 12x12b	A/D 16x12b
Operating Temperature	-40°C ~ 125°C (TA)	-40°C ~ 105°C (TA)
Package / Case	80-LQFP (12x12)	100-LQFP (14x14)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The TMS320F28065UPZT is the active production equivalent for the obsolete TMS320F28065UPNT. Selection of the substitute part is driven by:

Product Status: The original part is classified as obsolete, making the active TMS320F28065UPZT the appropriate choice for ongoing production and new designs.

Compliance: The substitute part achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. This compliance improvement aligns with current regulatory requirements for electronic components in most markets.

Functional Compatibility: Both devices share identical core architecture, processing speed, memory configuration, and peripheral feature sets, ensuring software and functional compatibility.

Package Considerations: The larger 100-LQFP package provides 14 additional I/O pins (54 total versus 40), offering expanded I/O capability. PCB layout modifications are required to accommodate the larger package footprint (14x14mm versus 12x12mm).

Temperature Range: The substitute part operates to 105°C maximum, compared to 125°C for the original. Applications requiring operation above 105°C require thermal analysis and potential design modification.

Data Converter Enhancement: The substitute part includes A/D 16x12b converters versus A/D 12x12b in the original, providing improved analog-to-digital conversion resolution.

Frequently Asked Questions (FAQ)

Q: Are the TMS320F28065UPNT and TMS320F28065UPZT software compatible?

A: Yes. Both devices utilize identical C28x core architecture and instruction sets. Firmware developed for the TMS320F28065UPNT executes without modification on the TMS320F28065UPZT.

Q: What are the primary differences between these two parts?

A: The substitute part features a larger 100-LQFP package (54 I/O pins) versus the original 80-LQFP package (40 I/O pins), enhanced A/D converter resolution (16x12b versus 12x12b), active product status, and ROHS3 compliance. Core processor, memory, and connectivity remain identical.

Q: Can I use the TMS320F28065UPZT as a direct drop-in replacement?

A: Direct PCB replacement is not possible due to package size and pin count differences. The 100-LQFP package (14x14mm) is larger than the 80-LQFP package (12x12mm), and the increased pin count (54 versus 40) requires PCB redesign. However, firmware and functional behavior are fully compatible.

Q: What is the maximum operating temperature for the substitute part?

A: The TMS320F28065UPZT operates from -40°C to 105°C. The original part operates to 125°C. Applications requiring operation above 105°C must remain on the original part or undergo thermal redesign.

Q: Does the substitute part meet current compliance standards?

A: Yes. The TMS320F28065UPZT is ROHS3 compliant and REACH unaffected. The original TMS320F28065UPNT is RoHS non-compliant, making the substitute part suitable for applications with regulatory compliance requirements.

Q: Are there any considerations for the increased I/O pin count?

A: The additional 14 I/O pins (54 total versus 40) provide expanded connectivity options. PCB layout must accommodate the larger package footprint and additional signal routing. Unused pins should be properly terminated according to Texas Instruments design guidelines.

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