PCK111BD,128 Equivalent & Substitute Parts

Part Overview

The PCK111BD,128 is a Clock Fanout Buffer (Distribution) IC manufactured by NXP USA Inc., designed for 2:10 clock distribution at 1.5 GHz in a 32-LQFP package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across a supply voltage range of 2.25V to 3.8V and supports ECL, HSTL, and PECL input standards with PECL output, suitable for high-speed timing applications requiring differential signal distribution.

Substiute Parts

PCK111BD,128

NXP USA Inc.In Stock: 1130PCK111BD,128 Datasheet

Current PartRFQ

CDCLVP110MVFR

Texas InstrumentsIn Stock: 3498CDCLVP110MVFR Datasheet

MFR RecommendedRFQ

CDCLVP110VF

Texas InstrumentsIn Stock: 3237CDCLVP110VF Datasheet

MFR RecommendedRFQ

CDCLVP110VFR

Texas InstrumentsIn Stock: 2588CDCLVP110VFR Datasheet

MFR RecommendedRFQ

CDCLVP110VFRG4

Texas InstrumentsIn Stock: 1744CDCLVP110VFRG4 Datasheet

MFR RecommendedRFQ

MC100LVEP111FAG

onsemiIn Stock: 2675MC100LVEP111FAG Datasheet

MFR RecommendedRFQ

MC100LVEP111FARG

onsemiIn Stock: 31267MC100LVEP111FARG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PCK111BD,128 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Input:Output Ratio: 2:10 (mandatory match)
• Differential Input and Output: Yes/Yes (mandatory match)
• Package / Case: 32-LQFP (mandatory match)
• Operating Temperature Range: -40°C ~ 85°C (mandatory match)
• Supply Voltage Overlap: Minimum 2.25V compatibility required

Acceptable Variation Parameters:

• Maximum Frequency: Substitute parts may exceed 1.5 GHz (higher frequency capability is backward compatible)
• Input Standards: Substitute parts may support additional input standards beyond ECL, HSTL, PECL
• Output Standard: Substitute parts may support additional output standards beyond PECL
• Product Status: Active parts are preferred over obsolete parts

All identified substitute parts meet the mandatory matching criteria. The CDCLVP110 series (Texas Instruments) and MC100LVEP111 series (onsemi) satisfy all electrical and mechanical requirements while offering improved frequency performance and active product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Product Status):

CDCLVP110MVFR, CDCLVP110VF, and CDCLVP110VFR from Texas Instruments are the preferred substitutes. All three parts maintain active product status, ROHS3 compliance, and MSL 1 rating. The CDCLVP110 series provides 4.6 GHz maximum frequency, exceeding the original 1.5 GHz specification while maintaining full backward compatibility. Supply voltage range (2.375V ~ 3.8V) overlaps with the original part's 2.25V ~ 3.8V range. Packaging variants differ only in delivery format (Tray vs. Tape & Reel), with no functional differences.

Secondary Substitutes (Active Product Status):

MC100LVEP111FAG and MC100LVEP111FARG from onsemi provide 3 GHz maximum frequency with active product status and ROHS3 compliance. These parts operate at 2.375V ~ 3.8V supply voltage. The MSL 2 rating (1 Year) requires standard moisture control during storage and handling, compared to the MSL 1 rating of the original and primary substitutes.

Discontinued Substitute (Limited Availability):

CDCLVP110VFRG4 is discontinued at DiGi Electronics and should be avoided for new designs despite meeting all electrical and mechanical specifications.

Frequently Asked Questions (FAQ)

Q: Can CDCLVP110 series parts directly replace PCK111BD,128 in existing designs?

A: Yes. The CDCLVP110 series maintains identical 2:10 input:output ratio, differential input/output configuration, 32-LQFP package, and operating temperature range. The higher 4.6 GHz maximum frequency is backward compatible with 1.5 GHz applications. Supply voltage range overlap (2.375V ~ 3.8V) is compatible with designs operating above 2.375V.

Q: What is the difference between CDCLVP110MVFR, CDCLVP110VF, and CDCLVP110VFR?

A: These three parts are electrically identical. The differences are packaging formats: CDCLVP110MVFR is supplied without specified packaging, CDCLVP110VF is supplied in Tray, and CDCLVP110VFR is supplied in Tape & Reel (TR). Select based on assembly process requirements and inventory management preferences.

Q: Why do MC100LVEP111 parts have MSL 2 rating instead of MSL 1?

A: MSL 2 (1 Year) requires standard moisture control during storage and handling. This is more restrictive than MSL 1 (Unlimited) but remains suitable for standard manufacturing environments. Ensure proper storage conditions and follow onsemi handling guidelines.

Q: Are there supply voltage compatibility concerns with substitutes?

A: The original PCK111BD,128 operates at 2.25V ~ 3.8V. All substitute parts operate at 2.375V ~ 3.8V. Designs operating below 2.375V require verification that the substitute part meets minimum voltage requirements. Designs operating at 2.375V or above are fully compatible.

Q: Which substitute offers the best frequency performance?

A: CDCLVP110 series parts from Texas Instruments offer 4.6 GHz maximum frequency, the highest among all substitutes. MC100LVEP111 series parts from onsemi offer 3 GHz maximum frequency. Both exceed the original 1.5 GHz specification and are suitable for high-speed timing applications.