AS-13.225625MAHK-B Crystal Oscillator Equivalent & Substitute Parts

Part Overview

The AS-13.225625MAHK-B is a 13.225625 MHz through-hole crystal oscillator manufactured by TXC CORPORATION. This component operates at a fundamental frequency with ±30ppm stability and 20pF load capacitance, housed in an HC-49/US package. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support, maintenance, and production continuity. Substitute parts must maintain electrical and mechanical compatibility while meeting the same operational specifications.

Substiute Parts

AS-13.225625MAHK-B

TXC CORPORATIONIn Stock: 1022AS-13.225625MAHK-B Datasheet

Current PartRFQ

QT49-13.225625MAHK-B

QSTIn Stock: 693QT49-13.225625MAHK-B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AS-13.225625MAHK-B are identified based on strict electrical and mechanical parameter matching. The substitution logic requires:

Mandatory Matching Parameters:

• Frequency: 13.225625 MHz (exact match required)
• Frequency Stability: ±30ppm (tolerance specification must be met or exceeded)
• Load Capacitance: 20pF (circuit design parameter)
• Operating Mode: Fundamental (frequency generation method)
• Operating Temperature Range: -40°C ~ 85°C (environmental specification)
• Mounting Type: Through Hole (PCB assembly compatibility)

Compatible Package Variants: HC-49/US and HC-49S packages are mechanically and electrically compatible for through-hole applications. Both maintain identical footprint dimensions (0.453" L x 0.197" W / 11.50mm x 5.00mm) and maximum seated height (0.145" / 3.68mm).

ESR Consideration: The ESR parameter may vary between substitute parts. Lower ESR values (40 Ohms vs. 60 Ohms) improve oscillator performance characteristics and reduce power consumption without affecting circuit functionality.

Parameter Comparison

Engineering Selection Recommendations

The QT49-13.225625MAHK-B manufactured by QST qualifies as a direct electrical and mechanical substitute for the obsolete AS-13.225625MAHK-B. Selection criteria are based on the following factors:

Product Status Consideration: The AS-13.225625MAHK-B is classified as obsolete. The QT49-13.225625MAHK-B maintains active product status, ensuring ongoing availability and supply chain continuity for new production and field replacements.

Electrical Compatibility: All critical electrical parameters match exactly: frequency (13.225625 MHz), frequency stability (±30ppm), load capacitance (20pF), and operating temperature range (-40°C ~ 85°C). The ESR difference (40 Ohms vs. 60 Ohms) represents an improvement in oscillator performance characteristics.

Mechanical Compatibility: Both components utilize through-hole mounting with identical footprint dimensions and maximum seated height. HC-49/US and HC-49S package variants are mechanically interchangeable for PCB assembly applications.

Compliance Status: Both parts meet RoHS requirements. The QT49-13.225625MAHK-B carries ROHS3 compliance, meeting current regulatory standards. Both components are classified under ECCN EAR99 and HTSUS 8541.60.0050.

Inventory Availability: The QT49-13.225625MAHK-B is available with 667 pieces in stock as new original inventory, supporting immediate procurement for production and maintenance applications.

Frequently Asked Questions (FAQ)

Q: Can the QT49-13.225625MAHK-B be used as a direct replacement for the AS-13.225625MAHK-B?

A: Yes. The QT49-13.225625MAHK-B is a direct electrical and mechanical substitute. All critical parameters match: frequency, frequency stability, load capacitance, operating temperature range, and through-hole mounting configuration. The HC-49S package is mechanically compatible with HC-49/US footprints.

Q: What is the significance of the ESR difference (60 Ohms vs. 40 Ohms)?

A: ESR (Equivalent Series Resistance) affects oscillator startup characteristics and power consumption. The lower ESR of the QT49-13.225625MAHK-B (40 Ohms) provides improved performance compared to the original part (60 Ohms). This difference does not affect circuit functionality but enhances oscillator efficiency.

Q: Are HC-49/US and HC-49S packages interchangeable?

A: Yes, for through-hole PCB applications. Both packages maintain identical footprint dimensions (0.453" L x 0.197" W) and maximum seated height (0.145"). The packages are mechanically and electrically compatible for standard through-hole assembly processes.

Q: Does the substitute part meet current compliance requirements?

A: Yes. The QT49-13.225625MAHK-B is ROHS3 compliant, meeting current regulatory standards. Both the original and substitute parts are classified under ECCN EAR99 and HTSUS 8541.60.0050.

Q: Why is the original AS-13.225625MAHK-B classified as obsolete?

A: Product obsolescence is determined by manufacturer discontinuation. The QT49-13.225625MAHK-B maintains active status, ensuring continued availability for production and field replacement applications.

Q: What parameters must match exactly for substitution?

A: Frequency (13.225625 MHz), frequency stability (±30ppm), load capacitance (20pF), operating mode (fundamental), operating temperature range (-40°C ~ 85°C), and mounting type (through hole) must match exactly. Package variants (HC-49/US and HC-49S) are compatible alternatives.