CDCV857BDGG PLL Clock Driver Equivalent & Substitute Parts

Part Overview

The CDCV857BDGG is a PLL Clock Driver IC manufactured by Texas Instruments, designed for clock distribution and timing applications. This device features a 1:10 input-to-output ratio with differential input and output capabilities, operating at a maximum frequency of 200MHz. The part is currently classified as Obsolete, making identification of compatible substitute components essential for ongoing system support and new design considerations where legacy compatibility is required.

Substiute Parts

CDCV857BDGG

Texas InstrumentsIn Stock: 1610CDCV857BDGG Datasheet

Current PartRFQ

CDCV857ADGG

Texas InstrumentsIn Stock: 1281CDCV857ADGG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDCV857BDGG is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Package / Case: 48-TFSOP (0.240", 6.10mm Width)
• Ratio - Input:Output: 1:10
• Differential - Input:Output: Yes/Yes
• Voltage - Supply: 2.3V ~ 2.7V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• PLL with Bypass capability

Allowable Variation:

• Frequency - Max: The substitute part may operate at a lower maximum frequency provided it meets or exceeds the application requirement. The CDCV857BDGG operates at 200MHz maximum; substitutes operating at 180MHz or higher remain functionally compatible for applications not requiring the full 200MHz specification.

The CDCV857ADGG qualifies as a parametric equivalent based on these criteria, with the primary distinction being a reduced maximum frequency specification of 180MHz versus the original 200MHz.

Parameter Comparison

Engineering Selection Recommendations

Both the CDCV857BDGG and CDCV857ADGG are classified as legacy components. The CDCV857BDGG is Obsolete, while the CDCV857ADGG is designated Not For New Designs. Both parts maintain ROHS3 compliance and identical MSL ratings, ensuring equivalent environmental and regulatory standing.

Selection between these parts depends on application frequency requirements. The CDCV857BDGG supports operation to 200MHz, while the CDCV857ADGG is specified to 180MHz. For applications operating at or below 180MHz, the CDCV857ADGG provides functional equivalence. For applications requiring operation above 180MHz and up to 200MHz, the CDCV857BDGG is the appropriate selection.

Both parts share identical package geometry, pinout, supply voltage range, temperature operating range, and differential signal characteristics, ensuring direct mechanical and electrical compatibility within their respective frequency specifications.

Frequently Asked Questions (FAQ)

Q: Can the CDCV857ADGG replace the CDCV857BDGG in all applications?

A: The CDCV857ADGG is a functional substitute provided the application clock frequency does not exceed 180MHz. Both parts share identical package, pinout, supply voltage, temperature range, and differential signal specifications. If your application operates at frequencies above 180MHz, the CDCV857BDGG is required.

Q: Are there any package or pinout differences between these parts?

A: No. Both the CDCV857BDGG and CDCV857ADGG use the 48-TFSOP package with 0.240" width and 6.10mm body width. Pinout and mechanical dimensions are identical, enabling direct board-level substitution.

Q: What is the significance of the product status designations?

A: The CDCV857BDGG is classified as Obsolete, indicating it is no longer manufactured. The CDCV857ADGG is designated Not For New Designs, indicating limited availability and no recommended use in new product development. Both statuses reflect the legacy nature of these components.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the CDCV857BDGG and CDCV857ADGG are ROHS3 compliant and carry identical Moisture Sensitivity Level (MSL) ratings of 2 (1 Year), ensuring equivalent environmental and regulatory compliance.

Q: What is the input-to-output ratio for these clock drivers?

A: Both parts operate with a 1:10 input-to-output ratio, meaning a single input clock is distributed to ten output channels with differential signaling on both input and output.