Equivalent & Substitute Parts for 7A-20.000MAAV-T

Part Overview

The 7A-20.000MAAV-T is a 20 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION, designed for surface mount applications in 2-SMD, No Lead packaging. This part operates at ±30ppm frequency stability with 8pF load capacitance and 50 Ohms equivalent series resistance across an operating temperature range of -20°C to 70°C. The product is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and field replacement requirements.

Substiute Parts

7A-20.000MAAV-T

TXC CORPORATIONIn Stock: 8207A-20.000MAAV-T Datasheet

Current PartRFQ

445C33A20M00000

CTS-Frequency ControlsIn Stock: 1591445C33A20M00000 Datasheet

SimilarRFQ

445C33J20M00000

CTS-Frequency ControlsIn Stock: 939445C33J20M00000 Datasheet

SimilarRFQ

445C33K20M00000

CTS-Frequency ControlsIn Stock: 823445C33K20M00000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 7A-20.000MAAV-T is determined by strict equivalence in the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 20.0000 MHz (exact match required)
• Frequency Stability: ±30ppm (exact match required)
• Operating Mode: Fundamental (exact match required)
• Operating Temperature Range: -20°C to 70°C (exact match required)
• Package / Case: 2-SMD, No Lead (exact match required)
• Size / Dimension: 5.00mm x 3.20mm (exact match required)
• Height - Seated (Max): 1.35mm (exact match required)
• Mounting Type: Surface Mount (exact match required)

Allowable Variation Parameters:

• Load Capacitance: 8pF to 10pF (within circuit design tolerance)
• ESR (Equivalent Series Resistance): 40 to 50 Ohms (within circuit design tolerance)

All three substitute parts (445C33K20M00000, 445C33A20M00000, 445C33J20M00000) from CTS-Frequency Controls meet these substitution criteria. These parts are manufactured by an established frequency control supplier and maintain active product status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

445C33K20M00000 (CTS-Frequency Controls) is the primary direct substitute for the 7A-20.000MAAV-T. This part maintains identical load capacitance (8pF) and provides lower ESR (40 Ohms versus 50 Ohms), which represents an improvement in circuit performance characteristics. The part is manufactured by CTS-Frequency Controls, an active supplier with established quality certifications (ROHS3 Compliant, REACH Unaffected). Current inventory of 771 pieces supports immediate procurement requirements.

445C33J20M00000 (CTS-Frequency Controls) serves as a secondary substitute with 9pF load capacitance. This part is suitable for applications where the circuit design accommodates load capacitance variation within the 8pF to 10pF range. ESR specification of 40 Ohms provides equivalent or superior performance. Inventory availability of 921 pieces supports sustained supply.

445C33A20M00000 (CTS-Frequency Controls) functions as a tertiary substitute with 10pF load capacitance. This part is applicable only when circuit design parameters explicitly permit maximum load capacitance tolerance. ESR of 40 Ohms maintains performance equivalence. Highest inventory availability of 1499 pieces ensures supply continuity.

All three CTS-Frequency Controls substitutes maintain active product status, ensuring long-term availability and technical support. Selection among the three options depends on circuit design load capacitance specifications and tolerance requirements.

Frequently Asked Questions (FAQ)

Q: Can 445C33K20M00000 be used as a direct replacement for 7A-20.000MAAV-T without circuit modification?

A: Yes. The 445C33K20M00000 maintains identical frequency (20.0000 MHz), frequency stability (±30ppm), load capacitance (8pF), operating temperature range (-20 to 70°C), and physical dimensions (5.00 x 3.20 x 1.35mm). The lower ESR (40 Ohms versus 50 Ohms) represents an improvement. No circuit modification is required.

Q: What is the difference between the three CTS substitute parts?

A: The three CTS-Frequency Controls substitutes differ only in load capacitance specification: 445C33K20M00000 (8pF), 445C33J20M00000 (9pF), and 445C33A20M00000 (10pF). All other electrical and mechanical parameters are identical. Selection depends on circuit design load capacitance tolerance.

Q: Are the CTS substitutes compatible with the original PCB footprint?

A: Yes. All three CTS substitutes maintain identical package type (2-SMD, No Lead), physical dimensions (5.00 x 3.20mm), and maximum seated height (1.35mm). PCB footprint and assembly process compatibility is maintained without modification.

Q: What is the significance of the lower ESR in the CTS substitutes?

A: ESR (Equivalent Series Resistance) of 40 Ohms in the CTS substitutes is lower than the original 50 Ohms specification. Lower ESR reduces energy dissipation and improves frequency stability performance. This represents an enhancement over the original part specification.

Q: Are the CTS substitutes RoHS compliant?

A: Yes. All three CTS-Frequency Controls substitutes are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements. The original 7A-20.000MAAV-T is RoHS Compliant, confirming regulatory alignment.

Q: Which substitute should be selected for new production designs?

A: Selection depends on circuit design load capacitance specification. If the design specifies 8pF load capacitance, use 445C33K20M00000. If the design permits 9pF or 10pF load capacitance, 445C33J20M00000 or 445C33A20M00000 are applicable. All three parts are active products with established supply availability.

Q: What is the MSL rating and why is it important?

A: All parts, including the original and substitutes, carry MSL 1 (Unlimited) rating. This indicates unlimited shelf life without moisture absorption concerns, simplifying storage and handling requirements for both original and substitute components.