TMS320LF2402APGS Equivalent & Substitute Parts

Part Overview

The TMS320LF2402APGS is a 16-bit C2xx DSP microcontroller from Texas Instruments' C2000™ C24x series, designed for embedded control applications. This device features 16KB of FLASH program memory, 2K x 8 RAM, and operates at 40MHz with a supply voltage range of 3V to 3.6V. The component is mounted in a 64-QFP package and is currently classified as obsolete, making substitute part identification essential for ongoing system support and new design implementations.

Substiute Parts

TMS320LF2402APGS

Texas InstrumentsIn Stock: 2237TMS320LF2402APGS Datasheet

Current PartRFQ

TMS320F28020PTS

Texas InstrumentsIn Stock: 1288TMS320F28020PTS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TMS320LF2402APGS is determined by the following critical parameters:

Core Architecture Compatibility: The TMS320F28020PTS operates within the same TMS320 base product family, ensuring instruction set compatibility and software portability for DSP-based applications.

Operating Frequency: Both devices maintain a 40MHz clock speed, preserving real-time performance characteristics and timing-dependent control functions.

Supply Voltage Range: While the TMS320LF2402APGS operates at 3V to 3.6V and the TMS320F28020PTS operates at 1.71V to 1.995V, both devices are designed for low-voltage embedded applications. The substitute operates at a lower voltage envelope, which may require power supply redesign.

Memory Architecture: The substitute provides increased program memory (32KB versus 16KB) and expanded RAM (3K x 16 versus 2K x 8), offering enhanced capability for complex control algorithms.

Peripheral Enhancement: The TMS320F28020PTS includes expanded connectivity (I2C, SCI, SPI, UART/USART versus SCI only) and additional analog-to-digital conversion capacity (13x12b versus 8x10b), supporting more sophisticated sensor integration.

Package Transition: The substitute uses a 48-LQFP package versus the original 64-QFP, requiring PCB layout redesign but offering reduced board footprint.

Product Status & Compliance: The TMS320F28020PTS is active production status with ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

The TMS320F28020PTS is the designated manufacturer substitute for the obsolete TMS320LF2402APGS. Selection of this substitute is supported by the following engineering criteria:

Product Lifecycle Status: The TMS320LF2402APGS is obsolete, creating supply chain risk. The TMS320F28020PTS is in active production, ensuring availability and long-term support.

Regulatory Compliance: Both devices maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and hazardous substance regulations.

Functional Capability: The substitute provides enhanced processing capability (32-bit architecture versus 16-bit), expanded memory resources, and extended peripheral connectivity, enabling migration of existing applications with potential for functional enhancement.

Design Considerations: Implementation of the TMS320F28020PTS requires evaluation of the following factors: power supply voltage adjustment (1.71V to 1.995V versus 3V to 3.6V), PCB layout redesign for the 48-LQFP package transition, and firmware validation to confirm compatibility with the C28x architecture.

Frequently Asked Questions (FAQ)

Q: Can the TMS320F28020PTS directly replace the TMS320LF2402APGS without firmware modification?

A: The TMS320F28020PTS uses the C28x processor architecture while the original uses the C2xx DSP architecture. Both are part of the TMS320 family, but firmware requires validation and potential modification to ensure compatibility with the enhanced instruction set and peripheral configuration of the substitute device.

Q: What is the primary reason for substitution?

A: The TMS320LF2402APGS is classified as obsolete. The TMS320F28020PTS is the active production substitute from Texas Instruments, providing continued availability and support for applications requiring this microcontroller class.

Q: Are there package compatibility issues?

A: Yes. The original device uses a 64-QFP package while the substitute uses a 48-LQFP package. PCB layout redesign is required, including pin mapping verification and signal routing adjustments.

Q: What are the voltage supply differences?

A: The TMS320LF2402APGS operates at 3V to 3.6V, while the TMS320F28020PTS operates at 1.71V to 1.995V. Power supply circuitry must be redesigned to accommodate the lower voltage envelope of the substitute device.

Q: Does the substitute provide additional functionality?

A: Yes. The TMS320F28020PTS includes expanded connectivity options (I2C, SPI, UART/USART in addition to SCI), higher-resolution analog-to-digital conversion (13x12b versus 8x10b), increased program memory (32KB versus 16KB), and additional RAM (3K x 16 versus 2K x 8).

Q: Are both devices RoHS compliant?

A: Yes. Both the TMS320LF2402APGS and TMS320F28020PTS are ROHS3 compliant and REACH unaffected, meeting current environmental regulations.