Equivalent & Substitute Parts for 9C-5.000MAAJ-T

Part Overview

The 9C-5.000MAAJ-T is a 5 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION, designed for surface mount applications in HC-49/US package configuration. This component operates at 5.0000 MHz with ±30ppm frequency stability and 18pF load capacitance. The part is classified as obsolete, necessitating identification of active substitute components that maintain electrical and mechanical compatibility for ongoing production and maintenance applications.

Substiute Parts

9C-5.000MAAJ-T

TXC CORPORATIONIn Stock: 7859C-5.000MAAJ-T Datasheet

Current PartRFQ

LP050F33CDT

CTS-Frequency ControlsIn Stock: 747LP050F33CDT Datasheet

SimilarRFQ

LP050F33CET

CTS-Frequency ControlsIn Stock: 701LP050F33CET Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 9C-5.000MAAJ-T is determined by strict alignment of the following critical parameters:

Primary Matching Criteria:

• Frequency: 5 MHz (exact match required)
• Frequency Stability: ±30ppm (exact match required)
• ESR: 80 Ohms (exact match required)
• Operating Mode: Fundamental (exact match required)
• Package / Case: HC-49/US (exact match required)
• Operating Temperature Range: -20°C to 70°C (exact match required)
• Mounting Type: Surface Mount (exact match required)

Secondary Compatibility Factors:

• Load Capacitance: 18pF (primary specification); 20pF (acceptable with circuit design verification)
• RoHS Compliance: ROHS3 Compliant (required)
• Moisture Sensitivity Level: 1 (Unlimited) (required)

Two substitute parts from CTS-Frequency Controls meet these criteria and are classified as active products, providing long-term availability for design transitions.

Parameter Comparison

Engineering Selection Recommendations

LP050F33CDT (CTS-Frequency Controls) - Primary Substitute

The LP050F33CDT provides direct electrical and mechanical substitution for the 9C-5.000MAAJ-T. This part maintains identical frequency (5 MHz), frequency stability (±30ppm), load capacitance (18pF), and ESR (80 Ohms) specifications. The component is classified as active product status, ensuring long-term availability and supply chain continuity. Physical dimensions are within acceptable tolerance for HC-49/US package compatibility. RoHS3 compliance and MSL 1 rating match the original specification. This substitute is suitable for direct replacement in existing designs without circuit modification.

LP050F33CET (CTS-Frequency Controls) - Secondary Substitute

The LP050F33CET offers electrical substitution with a load capacitance specification of 20pF, compared to the original 18pF. All other electrical parameters (frequency, stability, ESR, operating mode, temperature range) remain identical. This part is active product status with equivalent compliance certifications. The 20pF load capacitance represents a 2pF deviation from the original specification. Selection of this substitute requires confirmation that the circuit design accommodates the alternative load capacitance value without affecting frequency accuracy or system performance.

Both CTS-Frequency Controls substitutes are ROHS3 compliant and carry EAR99 export classification, matching the regulatory profile of the original component.

Frequently Asked Questions (FAQ)

Q: Can LP050F33CDT be used as a direct replacement for 9C-5.000MAAJ-T without circuit modification?

A: Yes. The LP050F33CDT maintains identical electrical specifications (5 MHz, ±30ppm stability, 18pF load capacitance, 80 Ohms ESR) and HC-49/US package configuration. Physical dimensions are within acceptable tolerance for surface mount applications. No circuit design changes are required.

Q: What is the difference between LP050F33CDT and LP050F33CET?

A: The primary difference is load capacitance specification. LP050F33CDT specifies 18pF (matching the original 9C-5.000MAAJ-T), while LP050F33CET specifies 20pF. All other electrical parameters are identical. The 20pF variant requires circuit design verification to confirm compatibility with the oscillator circuit's load capacitance requirements.

Q: Are the physical dimensions of CTS substitutes compatible with the original PCB layout?

A: The CTS-Frequency Controls substitutes (LP050F33CDT and LP050F33CET) have slightly smaller length (0.437" vs 0.449") and width (0.190" vs 0.189") dimensions, with reduced seated height (0.126" vs 0.161"). These dimensional differences are within HC-49/US package tolerance and are compatible with standard surface mount footprints designed for the original component. Verification of PCB clearance is recommended for designs with tight component spacing.

Q: What is the product status significance of the 9C-5.000MAAJ-T being obsolete?

A: Obsolete status indicates the 9C-5.000MAAJ-T is no longer manufactured by TXC CORPORATION and existing inventory will eventually deplete. The identified CTS-Frequency Controls substitutes (LP050F33CDT and LP050F33CET) are active products with ongoing manufacturing and supply availability, providing long-term sourcing security for new production and maintenance applications.

Q: Do the substitute parts meet the same regulatory and compliance requirements?

A: Yes. Both LP050F33CDT and LP050F33CET are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are classified as EAR99 export items with HTSUS code 8541.60.0030, matching the regulatory profile of the original 9C-5.000MAAJ-T.

Q: Which substitute should be selected for new design implementations?

A: LP050F33CDT is the recommended selection for new designs, as it provides exact electrical parameter matching (18pF load capacitance) with the original specification, eliminating the need for circuit design verification. LP050F33CET may be selected if 20pF load capacitance is acceptable within the circuit design parameters.