RZTHC6748 Equivalent & Substitute Parts

Part Overview

The RZTHC6748 is a DSP (Digital Signal Processor) integrated circuit from Texas Instruments, part of the TMS320C674x series. This device features 320KB of embedded memory and is housed in a 361-pin FBGA package. The RZTHC6748 is classified as obsolete, making identification of active equivalent parts essential for ongoing system support and new design implementations. Substitute parts must maintain functional compatibility across core processing capabilities, memory architecture, and interface specifications.

Substiute Parts

RZTHC6748

Texas InstrumentsIn Stock: 1180RZTHC6748 Datasheet

Current PartRFQ

TMS320C6748EZWT3

Texas InstrumentsIn Stock: 30490TMS320C6748EZWT3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RZTHC6748 is based on the following critical parameters that must remain consistent:

• Series Alignment: Both parts belong to the TMS320C674x series, ensuring architectural compatibility
• Processing Capability: Fixed/Floating Point type maintained across substitutes
• Clock Frequency: 375MHz operational frequency preserved
• Memory Configuration: 448kB on-chip RAM and external non-volatile memory architecture
• Package Compatibility: 361-LFBGA / 361-NFBGA (16x16) pin-for-pin compatibility
• Interface Set: Complete EBI/EMI, Ethernet MAC, Host Interface, I2C, McASP, SPI, UART, and USB support
• Voltage Specifications: Core and I/O voltage ranges must support system requirements
• Environmental Compliance: RoHS3 compliance and MSL rating maintained

The TMS320C6748EZWT3 qualifies as a direct substitute based on these parameters. The primary distinction is product status: the substitute is active and widely available, whereas the original part is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The TMS320C6748EZWT3 is the direct functional equivalent for the obsolete RZTHC6748. Selection criteria are based on the following factors:

Product Status: The RZTHC6748 is obsolete and subject to availability constraints. The TMS320C6748EZWT3 maintains active production status with documented inventory availability (30,400 units), ensuring supply chain continuity.

Compliance Certification: Both parts maintain ROHS3 compliance and identical MSL ratings, satisfying environmental and handling requirements for manufacturing and field deployment.

Electrical Compatibility: The TMS320C6748EZWT3 supports an expanded core voltage range (1.00V to 1.30V) compared to the fixed 1.20V specification of the RZTHC6748. This broader tolerance improves design flexibility while maintaining full backward compatibility with existing 1.20V system designs.

Packaging and Pinout: Pin-for-pin compatibility is maintained through identical 361-LFBGA / 361-NFBGA (16x16) packaging, enabling direct PCB-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Is the TMS320C6748EZWT3 a direct pin-for-pin replacement for the RZTHC6748?

A: Yes. Both parts use the 361-LFBGA package with 361-NFBGA (16x16) supplier packaging. Pin assignments, signal definitions, and electrical interface specifications are identical, permitting direct substitution on existing PCB designs.

Q: What is the primary reason for substitution?

A: The RZTHC6748 is classified as obsolete. The TMS320C6748EZWT3 is the active equivalent part from Texas Instruments, ensuring continued availability and manufacturing support.

Q: Are there differences in core voltage specifications?

A: The TMS320C6748EZWT3 supports core voltages of 1.00V, 1.10V, 1.20V, and 1.30V, whereas the RZTHC6748 operates at 1.20V. Systems designed for 1.20V operation remain fully compatible. The expanded voltage range of the substitute provides additional design flexibility for future applications.

Q: Do both parts support the same interface protocols?

A: Yes. Both the RZTHC6748 and TMS320C6748EZWT3 support identical interface sets: EBI/EMI, Ethernet MAC, Host Interface, I2C, McASP, SPI, UART, and USB.

Q: What is the packaging difference between the two parts?

A: There is no functional packaging difference. Both parts are supplied in 361-LFBGA packages with 361-NFBGA (16x16) supplier device packaging. The RZTHC6748 is supplied in bulk, while the TMS320C6748EZWT3 is supplied in trays. This is a logistics distinction only and does not affect electrical or mechanical compatibility.

Q: Are both parts RoHS compliant?

A: Yes. Both the RZTHC6748 and TMS320C6748EZWT3 are ROHS3 compliant and carry identical MSL ratings of 3 (168 Hours).