VS3673UNION Equivalent & Substitute Parts

Part Overview

The VS3673UNION is a Digital Media System-on-Chip (DMSoC) from Texas Instruments' TMS320DM3x DaVinci™ series, designed for embedded multimedia processing applications. This device integrates a 300MHz processor with comprehensive multimedia interfaces including Ethernet, USB, SPI, I2C, and McBSP connectivity. The part is currently in Last Time Buy status, indicating end-of-life transition. Identifying qualified substitute components is essential for design continuity and long-term product support.

Substiute Parts

VS3673UNION

Texas InstrumentsIn Stock: 854VS3673UNION Datasheet

Current PartRFQ

TMS320DM365ZCE21

Texas InstrumentsIn Stock: 2261TMS320DM365ZCE21 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the VS3673UNION is determined by the following critical parameters:

• Package Compatibility: Both main and substitute parts must use the 338-LFBGA (13x13) package to ensure PCB footprint and mechanical compatibility
• Interface Set: Equivalent parts must support the same interface protocols: EBI/EMI, Ethernet, I2C, McBSP, SPI, UART, and USB
• Memory Configuration: On-chip RAM of 56kB and ROM of 16kB must be maintained
• Voltage Specifications: I/O voltage levels (1.8V, 3.3V) and core voltage must be compatible with existing power delivery architecture
• Temperature Range: Operating range of 0°C ~ 85°C (TC) must be supported
• Compliance Standards: RoHS3 compliance and MSL rating of 3 (168 Hours) are required for manufacturing and storage compatibility

The TMS320DM365ZCE21 qualifies as a manufacturer-recommended substitute based on these parameters.

Parameter Comparison

Engineering Selection Recommendations

The TMS320DM365ZCE21 is the manufacturer-recommended substitute for the VS3673UNION. Both devices share identical package geometry, memory configuration, interface protocols, and compliance certifications. The substitute part maintains Active product status, ensuring continued availability and manufacturing support compared to the Last Time Buy status of the original part.

The primary difference is clock rate: the substitute operates at 216MHz versus the original 300MHz. Additionally, core voltage is reduced from 1.35V to 1.20V in the substitute part. These differences require evaluation against application-specific performance and power delivery requirements. Both parts maintain identical I/O voltage specifications and temperature operating range.

Selection should be based on whether the reduced clock rate and lower core voltage are compatible with the target application's processing demands and power architecture.

Frequently Asked Questions (FAQ)

Q: Can the TMS320DM365ZCE21 be used as a direct replacement for the VS3673UNION?

A: Both parts share the same 338-LFBGA package, identical interface set, matching memory configuration, and equivalent compliance certifications. Substitution is mechanically and electrically feasible. However, the 84MHz clock rate reduction (from 300MHz to 216MHz) and core voltage difference (1.35V to 1.20V) must be evaluated against application performance requirements.

Q: Are there any PCB layout considerations when switching between these parts?

A: Both parts use the 338-LFBGA (13x13) package with identical pinout compatibility. PCB footprints are interchangeable. Power delivery architecture should be reviewed to accommodate the lower core voltage requirement of the substitute part (1.20V versus 1.35V).

Q: What is the significance of the Last Time Buy status for the VS3673UNION?

A: Last Time Buy indicates the manufacturer is discontinuing this part number. The TMS320DM365ZCE21 maintains Active status, providing long-term availability and manufacturing support for new designs or production continuity.

Q: Are both parts RoHS3 compliant?

A: Yes, both the VS3673UNION and TMS320DM365ZCE21 are ROHS3 compliant with identical MSL ratings of 3 (168 Hours), ensuring compatibility with current manufacturing and storage requirements.

Q: Do both parts support the same interface protocols?

A: Yes, both parts support identical interface sets: EBI/EMI, Ethernet, I2C, McBSP, SPI, UART, and USB. No interface compatibility issues exist between the two parts.