CDCV855PWR PLL Clock Driver IC Equivalent & Substitute Parts

Part Overview

The CDCV855PWR is a PLL Clock Driver IC manufactured by Texas Instruments, designed for clock distribution and timing applications requiring SSTL-2 differential signaling. This device operates at a maximum frequency of 180MHz with a 1:5 input-to-output ratio and is housed in a 28-TSSOP surface mount package.

The CDCV855PWR carries a "Not For New Designs" product status, indicating that Texas Instruments has discontinued active development and support for this component. Organizations requiring this functionality in new designs or seeking inventory alternatives should evaluate qualified substitute parts that maintain electrical and mechanical compatibility.

Substiute Parts

CDCV855PWR

Texas InstrumentsIn Stock: 8899CDCV855PWR Datasheet

Current PartRFQ

CDCVF855PWR

Texas InstrumentsIn Stock: 2227CDCVF855PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDCV855PWR is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Package / Case: 28-TSSOP (0.173", 4.40mm Width) — ensures PCB footprint compatibility
• Mounting Type: Surface Mount — maintains assembly process compatibility
• Input / Output Signaling: SSTL-2 / SSTL-2 — ensures signal integrity with existing circuitry
• Differential Input / Output: Yes / Yes — maintains differential pair requirements
• Voltage - Supply: 2.3V ~ 2.7V — ensures power supply compatibility
• Number of Circuits: 1 — maintains functional block count

Allowable Variation Parameters:

• Frequency - Max: May exceed 180MHz without functional degradation
• Ratio - Input:Output: May differ if system timing requirements permit
• Operating Temperature: May exceed 0°C ~ 70°C range for enhanced reliability
• Product Status: Active status preferred for long-term availability

The CDCVF855PWR qualifies as a direct substitute based on matching all mandatory compatibility parameters while offering enhanced frequency capability and extended temperature range.

Parameter Comparison

Engineering Selection Recommendations

The CDCVF855PWR is the qualified substitute for the CDCV855PWR based on the following engineering criteria:

Electrical Compatibility: Both devices maintain identical supply voltage ranges (2.3V ~ 2.7V), signaling standards (SSTL-2), and differential pair architecture. The CDCVF855PWR operates at 220MHz maximum frequency, which exceeds the CDCV855PWR specification of 180MHz, providing operational headroom for timing applications.

Mechanical Compatibility: Both parts utilize the 28-TSSOP surface mount package with identical footprint dimensions (0.173", 4.40mm Width), ensuring direct PCB layout compatibility without redesign.

Regulatory Compliance: Both devices maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating, satisfying environmental and reliability requirements for industrial and commercial applications.

Product Lifecycle Status: The CDCVF855PWR carries Active product status, ensuring continued manufacturer support, availability, and long-term supply chain stability compared to the CDCV855PWR's "Not For New Designs" designation.

Temperature Range Enhancement: The CDCVF855PWR extends the operating temperature range to -40°C ~ 85°C, providing improved reliability across wider environmental conditions compared to the CDCV855PWR's 0°C ~ 70°C range.

Frequently Asked Questions (FAQ)

Q: Can the CDCVF855PWR directly replace the CDCV855PWR on existing PCBs?

A: Yes. Both devices share identical 28-TSSOP package dimensions and surface mount footprints. No PCB layout modifications are required for mechanical or electrical interface compatibility.

Q: What is the significance of the different input-to-output ratios (1:5 vs. 2:5)?

A: The ratio difference reflects the frequency multiplication factor. The CDCVF855PWR's 2:5 ratio combined with its 220MHz maximum frequency provides different timing characteristics. System-level timing requirements must be evaluated to confirm compatibility with the application's clock distribution architecture.

Q: Why is the CDCV855PWR marked "Not For New Designs"?

A: This designation indicates that Texas Instruments has concluded active development and support for this component. New designs should utilize the CDCVF855PWR, which maintains Active product status and ensures long-term availability and manufacturer support.

Q: Are there supply voltage or signaling compatibility concerns?

A: No. Both devices operate within the identical 2.3V ~ 2.7V supply range and utilize SSTL-2 differential signaling for both input and output. Existing power distribution and signal conditioning circuits require no modification.

Q: What is the impact of the extended operating temperature range?

A: The CDCVF855PWR's -40°C ~ 85°C range provides enhanced reliability in temperature-sensitive applications compared to the CDCV855PWR's 0°C ~ 70°C specification. This represents an engineering improvement with no negative impact on existing designs.

Q: Are both devices RoHS and REACH compliant?

A: Yes. Both the CDCV855PWR and CDCVF855PWR maintain ROHS3 compliance and REACH unaffected status, satisfying environmental regulatory requirements for industrial, commercial, and consumer applications.