TMS320C6657SCZH Equivalent & Substitute Parts

Part Overview

The TMS320C6657SCZH 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 TMS320C6657SCZH carries an obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for systems currently deployed or in development phases.

Substiute Parts

TMS320C6657SCZH

Texas InstrumentsIn Stock: 929TMS320C6657SCZH Datasheet

Current PartRFQ

TMS320C6657CZH

Texas InstrumentsIn Stock: 2656TMS320C6657CZH Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TMS320C6657SCZH is determined by strict equivalence across the following critical parameters:

• Identical processor core architecture and instruction set (TMS320C66x series)
• Matching clock frequency (1GHz)
• Equivalent on-chip memory configuration (2.06MB RAM, 128kB ROM)
• Identical voltage specifications (Core: 1.00V; I/O: 1.0V, 1.5V, 1.8V)
• Matching operating temperature range (0°C to 85°C)
• Compatible package footprint (625-BFBGA, FCBGA 21x21)
• Identical interface set (DDR3, EBI/EMI, Ethernet, McBSP, PCIe, I2C, SPI, UART, UPP)

The TMS320C6657CZH meets all substitution criteria as a direct equivalent, with the primary distinction being packaging format (Tray versus standard packaging) and active product status.

Parameter Comparison

Engineering Selection Recommendations

The TMS320C6657CZH is a direct functional equivalent to the TMS320C6657SCZH. Selection between these parts should be based on the following factors:

Product Status: The TMS320C6657CZH maintains active product status with confirmed inventory availability (2620 units), whereas the TMS320C6657SCZH is obsolete with limited remaining stock (886 units). For new designs or long-term production requirements, the active part number is the appropriate choice.

Compliance Posture: The TMS320C6657CZH is ROHS3 compliant, while the TMS320C6657SCZH is RoHS non-compliant. Applications subject to RoHS directives or customer compliance requirements must use the TMS320C6657CZH.

Packaging: Both parts are supplied in 625-FCBGA (21x21) packages with identical footprints. The TMS320C6657CZH is supplied in Tray packaging, which may affect handling and storage procedures but does not impact electrical or mechanical compatibility.

Regulatory Alignment: Both parts share identical ECCN, HTSUS, REACH, and MSL classifications, ensuring equivalent regulatory treatment in procurement and logistics.

Frequently Asked Questions (FAQ)

Q: Are the TMS320C6657SCZH and TMS320C6657CZH pin-compatible?

A: Yes. Both devices use the 625-FCBGA (21x21) package with identical pinout, voltage specifications, and interface configurations. Direct PCB-level substitution is supported without layout modifications.

Q: What is the difference between the two part numbers?

A: The primary differences are product status (obsolete versus active), RoHS compliance classification (non-compliant versus ROHS3 compliant), and packaging format (standard versus Tray). All electrical and functional specifications are identical.

Q: Can I use the TMS320C6657CZH as a replacement in existing designs using the TMS320C6657SCZH?

A: Yes. The TMS320C6657CZH is a direct substitute with identical core voltage, I/O voltage, clock rate, memory configuration, and interface set. No design changes are required.

Q: Does the Tray packaging of the TMS320C6657CZH affect performance or reliability?

A: No. Packaging format does not affect device performance, electrical characteristics, or reliability. Tray packaging is a logistics and handling consideration only.

Q: Are there any temperature or voltage derating differences between these parts?

A: No. Both parts operate across the identical temperature range (0°C to 85°C) and voltage specifications (Core: 1.00V; I/O: 1.0V, 1.5V, 1.8V). Derating curves and thermal characteristics are equivalent.

Q: Which part should I specify for new production?

A: The TMS320C6657CZH should be specified for new production due to its active product status, ROHS3 compliance, and confirmed long-term availability. The TMS320C6657SCZH is obsolete and should be used only for legacy system support or repair applications.