TMS320C6655SCZH Equivalent & Substitute Parts

Part Overview

The TMS320C6655SCZH is a fixed/floating-point digital signal processor (DSP) from Texas Instruments' TMS320C66x series, designed for embedded applications requiring high-performance signal processing. This device integrates a 1GHz clock rate with comprehensive on-chip memory (2.06MB RAM, 128kB ROM) and multiple communication interfaces including DDR3, Ethernet, PCIe, and serial protocols.

The TMS320C6655SCZH carries an obsolete product status, making equivalent substitutes necessary for new designs and ongoing production support. Identifying compatible alternatives ensures design continuity and supply chain reliability.

Substiute Parts

TMS320C6655SCZH

Texas InstrumentsIn Stock: 967TMS320C6655SCZH Datasheet

Current PartRFQ

TMS320C6655CZH

Texas InstrumentsIn Stock: 1993TMS320C6655CZH Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TMS320C6655SCZH is determined by strict alignment across the following critical parameters:

• Processor Architecture & Series: Must belong to TMS320C66x series
• Performance Specifications: Clock rate (1GHz), on-chip RAM (2.06MB), ROM (128kB)
• Electrical Characteristics: Core voltage (1.00V), I/O voltage levels (1.0V, 1.5V, 1.8V)
• Interface Compatibility: All specified interfaces (DDR3, EBI/EMI, Ethernet, McBSP, PCIe, I2C, SPI, UART, UPP)
• Package & Pinout: 625-BFBGA/FCBGA (21x21) form factor
• Operating Temperature Range: 0°C ~ 85°C (TC)

The TMS320C6655CZH qualifies as a direct substitute, matching all electrical, functional, and mechanical parameters while offering active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The TMS320C6655CZH is the direct equivalent substitute for the obsolete TMS320C6655SCZH. Selection is based on the following engineering criteria:

Functional Equivalence: Both parts share identical processor architecture, performance specifications, memory configuration, voltage requirements, operating temperature range, and interface capabilities. Pin-for-pin and functional compatibility is complete.

Product Status Advantage: The TMS320C6655CZH maintains active product status with Texas Instruments, ensuring continued availability, technical support, and manufacturing consistency. The main part's obsolete status creates supply and support risks.

Compliance Enhancement: The substitute achieves ROHS3 compliance, exceeding the non-compliant status of the main part. Both maintain identical REACH and export control classifications (ECCN, HTSUS).

Packaging & Handling: Identical MSL rating (3, 168 Hours) and package specifications ensure no changes to PCB assembly, storage, or handling procedures.

Supply Chain Reliability: With 1936 units in stock versus 890 for the main part, the substitute offers superior availability for production and prototyping.

Frequently Asked Questions (FAQ)

Q: Can the TMS320C6655CZH be used as a direct replacement for the TMS320C6655SCZH in existing designs?

A: Yes. All electrical parameters, interface specifications, memory configuration, clock rate, voltage requirements, and operating temperature ranges are identical. The 625-FCBGA (21x21) package pinout is compatible. No design modifications are required.

Q: What is the difference between the SCZH and CZH part number suffixes?

A: The suffix indicates packaging configuration. SCZH denotes standard packaging, while CZH indicates tray packaging. Both parts are functionally and electrically identical; the difference is in delivery format only.

Q: Does the improved RoHS compliance of the substitute affect compatibility?

A: No. ROHS3 compliance is a manufacturing and material improvement that does not alter electrical performance, pinout, or functional behavior. It represents an enhancement for regulatory and environmental requirements.

Q: Are there any thermal or electrical performance differences between these parts?

A: No. Both parts operate at identical core voltage (1.00V), I/O voltage levels (1.0V, 1.5V, 1.8V), clock rate (1GHz), and temperature range (0°C ~ 85°C TC). Thermal and electrical characteristics are equivalent.

Q: What is the MSL rating, and does it differ between the two parts?

A: Both parts carry MSL 3 (168 Hours), indicating identical moisture sensitivity and requiring the same storage, handling, and reflow procedures. No special precautions differ between the two.

Q: Can I mix these parts in the same production batch?

A: Yes. Functional and electrical equivalence permits interchangeable use in the same design and production environment. However, verify that your supply chain and quality documentation processes accommodate both part numbers if required by your organization's standards.