EPSON MA-505 20.0000M-C0:ROHS Crystal Oscillator Equivalent & Substitute Parts

Part Overview

The EPSON MA-505 20.0000M-C0:ROHS is a 20 MHz fundamental mode crystal oscillator designed for surface mount applications. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The MA-505 series features an 18pF load capacitance, 40 Ohms ESR, and is housed in a 4-SOJ package with 3.30mm pitch. Current inventory availability is limited to 1104 pieces.

Substiute Parts

MA-505 20.0000M-C0:ROHS

EPSONIn Stock: 1122MA-505 20.0000M-C0:ROHS Datasheet

Current PartRFQ

FA-238 16.0000MB-C3

EPSONIn Stock: 74912FA-238 16.0000MB-C3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MA-505 20.0000M-C0:ROHS is constrained by the following critical parameters:

• Frequency: The MA-505 operates at 20 MHz. Direct frequency matching is the primary substitution criterion.
• Load Capacitance: Fixed at 18pF. This parameter must match to ensure circuit compatibility without redesign.
• Operating Mode: Fundamental mode operation is required.
• Mounting Type: Surface mount configuration is mandatory for PCB compatibility.
• Environmental Compliance: ROHS3 compliance and MSL rating must be maintained.

The EPSON FA-238 16.0000MB-C3 listed in the provided substitute data does not meet the frequency matching requirement (16 MHz vs. 20 MHz) and therefore cannot serve as a direct functional equivalent. No qualifying substitute parts meeting all critical parameters are available in the provided dataset.

Parameter Comparison

Engineering Selection Recommendations

Based on the provided data, no direct substitute meeting all electrical and mechanical parameters is available. The FA-238 16.0000MB-C3 differs in three critical areas: operating frequency (16 MHz vs. 20 MHz), ESR (80 Ohms vs. 40 Ohms), and package configuration (4-SMD No Lead vs. 4-SOJ 3.30mm pitch). These differences preclude functional equivalence without circuit redesign.

For applications requiring the MA-505 20.0000M-C0:ROHS, procurement should focus on:

• Locating remaining inventory from authorized distributors
• Identifying alternative 20 MHz crystal oscillators with matching 18pF load capacitance and 4-SOJ packaging from other manufacturers
• Evaluating circuit redesign feasibility if alternative frequency options become necessary

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring environmental regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can the FA-238 16.0000MB-C3 replace the MA-505 20.0000M-C0:ROHS?

A: No. The FA-238 operates at 16 MHz, while the MA-505 operates at 20 MHz. Frequency mismatch prevents functional equivalence. Additionally, the ESR differs (80 Ohms vs. 40 Ohms) and the package configuration is different (4-SMD No Lead vs. 4-SOJ 3.30mm pitch).

Q: What parameters must match for crystal oscillator substitution?

A: Critical parameters include operating frequency, load capacitance, ESR, operating mode, package type, and pitch. All must align with the original design specification to ensure circuit functionality without modification.

Q: Why is the MA-505 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Existing inventory may be available through authorized distributors, but long-term availability cannot be guaranteed.

Q: Are there package compatibility considerations?

A: Yes. The MA-505 uses a 4-SOJ package with 3.30mm pitch, while the FA-238 uses a 4-SMD No Lead configuration. These are mechanically and electrically distinct and are not interchangeable on the same PCB footprint.

Q: Do both parts meet the same environmental standards?

A: Yes. Both the MA-505 and FA-238 are ROHS3 compliant with MSL rating 1 (Unlimited), ensuring equivalent environmental regulatory compliance.