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

Part Overview

The FA-365 20.0000MB-K 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 ±50ppm frequency tolerance and 10pF load capacitance specification.

The FA-365 series has reached obsolete product status. 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-K

EPSONIn Stock: 930FA-365 20.0000MB-K 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 eligibility for the FA-365 20.0000MB-K is determined by the following critical parameters:

Primary Matching Criteria:

• Frequency: 20 MHz (exact match required)
• Operating Mode: Fundamental (exact match required)
• ESR: 50 Ohms (exact match required)
• Operating Temperature Range: -20°C to 70°C (minimum coverage required)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

Secondary Compatibility Factors:

• Mounting Type: Surface Mount (required for PCB integration)
• Load Capacitance: Tolerance within design specifications
• Package Configuration: SMD, No Lead variants acceptable with dimensional verification

The ABMM2-20.000MHZ-E2-T from Abracon LLC meets all primary matching criteria and maintains compatibility across the specified operating parameters. While the substitute features a 4-SMD package configuration and 18pF load capacitance (compared to the original 2-SMD and 10pF), these differences remain within acceptable substitution boundaries when circuit design accommodates the load capacitance variance.

Parameter Comparison

Engineering Selection Recommendations

The ABMM2-20.000MHZ-E2-T qualifies as a direct substitute for the FA-365 20.0000MB-K based on the following engineering criteria:

Compliance & Regulatory Status: Both components maintain ROHS3 compliance, satisfying environmental and regulatory requirements for current manufacturing standards. The substitute part carries Active product status, ensuring ongoing availability and supply chain support.

Frequency & Stability Performance: The substitute demonstrates superior frequency stability (±20ppm versus ±30ppm) and tighter frequency tolerance (±20ppm versus ±50ppm), providing enhanced performance characteristics within the same 20 MHz fundamental mode specification.

Thermal & Operational Compatibility: Identical operating temperature range (-20°C to 70°C) and ESR specification (50 Ohms) ensure functional equivalence across standard industrial and commercial applications.

Package & Dimensional Considerations: The transition from 2-SMD to 4-SMD package configuration requires PCB layout verification. The substitute maintains comparable overall dimensions (6.00mm L x 3.60mm W versus 6.00mm L x 4.60mm W) with reduced seated height (1.20mm versus 1.40mm), facilitating straightforward mechanical integration.

Load Capacitance Variance: The 18pF load capacitance specification (versus 10pF original) necessitates circuit design review to confirm oscillator tuning network compatibility. This parameter difference does not preclude substitution but requires validation within the specific application context.

Frequently Asked Questions (FAQ)

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

A: Direct mechanical and electrical substitution is possible for the primary frequency and stability parameters. However, the 8pF load capacitance difference requires verification of the oscillator tuning network design. PCB layout adjustment may be necessary to accommodate the 4-SMD package configuration.

Q: What is the significance of the frequency stability difference (±30ppm versus ±20ppm)?

A: The substitute part provides tighter frequency stability, which represents improved performance. Applications with strict frequency accuracy requirements benefit from this enhanced specification. Applications designed for ±50ppm tolerance operate within acceptable margins with the substitute component.

Q: Are there any moisture sensitivity or handling differences between these components?

A: The FA-365 specifies MSL 1 (Unlimited moisture sensitivity level), indicating no moisture precautions required. The ABMM2-20.000MHZ-E2-T lists MSL as Not Applicable, confirming equivalent or superior moisture resistance characteristics.

Q: How does the package configuration change affect PCB design?

A: The transition from 2-SMD to 4-SMD requires footprint modification on the printed circuit board. The substitute maintains comparable overall dimensions with slightly reduced height, typically accommodating straightforward layout adjustments. Verify pad spacing and solder reflow compatibility with manufacturing equipment specifications.

Q: What is the supply availability status for each component?

A: The FA-365 20.0000MB-K (obsolete status) shows 913 pieces in current inventory. The ABMM2-20.000MHZ-E2-T (active status) maintains 2,407 pieces in inventory with ongoing manufacturing support, ensuring long-term supply chain continuity.