FA-365 20.0000MB-F Crystal Oscillator Equivalent & Substitute Parts

Part Overview

The FA-365 20.0000MB-F is a 20 MHz fundamental mode crystal oscillator manufactured by EPSON, designed for surface mount applications with a 2-SMD, No Lead package configuration. This component operates across the -20°C to 70°C temperature range with a load capacitance of 10pF and 50 Ohms equivalent series resistance.

The FA-365 series is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this crystal frequency standard.

Substiute Parts

FA-365 20.0000MB-F

EPSONIn Stock: 1165FA-365 20.0000MB-F Datasheet

Current PartRFQ

ABMM2-20.000MHZ-E2-T

Abracon LLCIn Stock: 2513ABMM2-20.000MHZ-E2-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FA-365 20.0000MB-F is evaluated based on the following critical parameters that determine functional and mechanical compatibility:

Frequency Matching: The substitute part must operate at 20 MHz to maintain system timing specifications.

Operating Mode: Both the main part and substitute must operate in fundamental mode to ensure consistent oscillation characteristics.

Operating Temperature Range: The substitute must support the -20°C to 70°C operating window or a range that encompasses it.

ESR and Load Capacitance: These parameters define the electrical loading characteristics. The substitute ABMM2-20.000MHZ-E2-T operates at 50 Ohms ESR (matching the main part) with 18pF load capacitance, which differs from the 10pF specification of the FA-365. This difference requires circuit-level evaluation.

Mounting Type and Package: Both parts are surface mount devices. The FA-365 uses a 2-SMD, No Lead package, while the ABMM2-20.000MHZ-E2-T uses a 4-SMD, No Lead package. Physical dimensions differ slightly (6.00mm x 4.60mm vs. 6.00mm x 3.60mm), and height varies (1.40mm vs. 1.20mm).

Compliance and Status: The ABMM2-20.000MHZ-E2-T is an active product with ROHS3 compliance and REACH Unaffected status, providing supply chain continuity for the obsolete FA-365.

Parameter Comparison

Engineering Selection Recommendations

The ABMM2-20.000MHZ-E2-T from Abracon LLC is identified as a substitute for the obsolete FA-365 20.0000MB-F based on the following engineering criteria:

Frequency and Operating Mode Alignment: Both parts operate at 20 MHz in fundamental mode, ensuring timing specification compatibility at the system level.

Temperature Range Compatibility: The ABMM2-20.000MHZ-E2-T supports the identical -20°C to 70°C operating temperature range, maintaining thermal performance requirements.

Compliance Status: The ABMM2-20.000MHZ-E2-T is ROHS3 compliant and REACH Unaffected, meeting current regulatory requirements. The substitute is an active product with established supply chain availability, addressing the obsolescence of the FA-365.

Frequency Stability Improvement: The ABMM2-20.000MHZ-E2-T provides ±20ppm frequency stability and tolerance, which is superior to the FA-365's ±30ppm stability and ±50ppm tolerance specifications.

Load Capacitance Consideration: The substitute specifies 18pF load capacitance compared to the main part's 10pF. This parameter difference requires evaluation within the specific circuit application to confirm compatibility with the oscillator circuit design.

Physical Dimensions: The substitute maintains similar footprint dimensions (6.00mm x 3.60mm vs. 6.00mm x 4.60mm) with a reduced height (1.20mm vs. 1.40mm), which may provide layout advantages. The package transition from 2-SMD to 4-SMD requires PCB footprint verification.

Frequently Asked Questions (FAQ)

Q: Can the ABMM2-20.000MHZ-E2-T directly replace the FA-365 20.0000MB-F without circuit modifications?

A: Direct replacement requires verification of load capacitance compatibility. The substitute specifies 18pF load capacitance versus the main part's 10pF. The oscillator circuit must be designed to accommodate the substitute's load capacitance specification. Additionally, the package change from 2-SMD to 4-SMD requires PCB footprint redesign.

Q: What is the significance of the frequency stability difference between the two parts?

A: The ABMM2-20.000MHZ-E2-T provides ±20ppm frequency stability compared to the FA-365's ±30ppm. This represents improved frequency accuracy. If the original design relied on the FA-365's ±50ppm tolerance specification, the substitute's tighter ±20ppm tolerance is compatible and provides enhanced performance margin.

Q: Are both parts compliant with current environmental regulations?

A: Yes. Both the FA-365 20.0000MB-F and ABMM2-20.000MHZ-E2-T are ROHS3 compliant. The ABMM2-20.000MHZ-E2-T is additionally REACH Unaffected, confirming compliance with current regulatory standards.

Q: What is the impact of the package change from 2-SMD to 4-SMD?

A: The package transition requires PCB footprint modification. The 4-SMD package of the ABMM2-20.000MHZ-E2-T has different pad configuration and spacing compared to the 2-SMD package of the FA-365. Physical dimensions are similar (6.00mm x 3.60mm vs. 6.00mm x 4.60mm), but the pad layout differs. PCB design verification is necessary.

Q: Is the ABMM2-20.000MHZ-E2-T available in the same packaging format as the FA-365?

A: The ABMM2-20.000MHZ-E2-T is supplied in Tape & Reel (TR) packaging, while the FA-365 packaging format is not specified in the provided data. Both are surface mount components suitable for automated assembly processes.

Q: What is the moisture sensitivity level of the substitute part?

A: The ABMM2-20.000MHZ-E2-T specifies Moisture Sensitivity Level as Not Applicable, indicating no moisture sensitivity constraints. The FA-365 specifies MSL 1 (Unlimited), also indicating no moisture sensitivity restrictions. Both parts are suitable for standard storage and handling conditions.