Crystek Corporation 017128 6.76438 MHz Crystal Equivalent & Substitute Parts

Part Overview

The Crystek Corporation 017128 is a 6.76438 MHz surface mount crystal with fundamental operating mode. This part is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The substitute part identified maintains the same frequency specification while offering active product status and enhanced parameter documentation.

Substiute Parts

017128

Crystek CorporationIn Stock: 848017128 Datasheet

Current PartRFQ

HCM496764380ABJT

Citizen Finedevice Co LtdIn Stock: 1086HCM496764380ABJT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The Citizen Finedevice Co Ltd HCM496764380ABJT qualifies as a direct substitute based on the following critical parameters:

• Identical frequency: 6.76438 MHz
• Matching operating mode: Fundamental
• Compatible mounting type: Surface Mount
• Equivalent moisture sensitivity: MSL 1 (Unlimited)
• Identical regulatory compliance: REACH Unaffected, ECCN EAR99, HTSUS 8541.60.0050

The substitute part provides additional parameter specifications including frequency tolerance (±30ppm), load capacitance (18pF), and ESR (100 Ohms), which were not documented for the original part. The substitute maintains active product status, ensuring continued availability and supply chain reliability.

Parameter Comparison

Engineering Selection Recommendations

The Citizen Finedevice Co Ltd HCM496764380ABJT serves as the qualified substitute for the obsolete Crystek 017128. Selection is based on:

• Identical frequency specification (6.76438 MHz) ensuring direct functional equivalence
• Active product status providing supply chain continuity and availability
• Matching regulatory compliance across REACH, ECCN, and HTSUS classifications
• Equivalent moisture sensitivity rating (MSL 1) for storage and handling requirements
• ROHS3 compliance of the substitute part exceeds the documentation available for the original part

The substitute part is suitable for direct replacement in applications requiring 6.76438 MHz surface mount crystals with fundamental operating mode.

Frequently Asked Questions (FAQ)

Q: Can the Citizen HCM496764380ABJT directly replace the Crystek 017128?

A: Yes. Both parts operate at 6.76438 MHz in fundamental mode with surface mount packaging. The substitute maintains identical regulatory compliance and moisture sensitivity specifications.

Q: What is the significance of the HC-49/US package designation?

A: The HC-49/US package is a standardized surface mount crystal package. This specification for the substitute part provides dimensional clarity (0.449" L x 0.185" W, 0.169" max height) not documented for the original part.

Q: Does the substitute part's ROHS3 compliance affect compatibility?

A: ROHS3 compliance indicates the substitute part meets current environmental standards. This does not affect electrical compatibility and represents an improvement over the original part's undocumented status.

Q: Why is the original part classified as obsolete?

A: Obsolete status indicates the Crystek 017128 is no longer in active production. The Citizen substitute provides equivalent functionality with active product status and ongoing availability.

Q: Are the frequency tolerance and load capacitance specifications critical for substitution?

A: The frequency tolerance (±30ppm) and load capacitance (18pF) are electrical parameters specific to the substitute part's design. These specifications ensure the part operates within defined performance boundaries for 6.76438 MHz applications.