FDC500020 Equivalent & Substitute Parts

Part Overview

The FDC500020 is a 125 MHz XO (Standard) CMOS oscillator manufactured by Diodes Incorporated, designed for applications requiring a stable frequency reference with enable/disable functionality. This Surface Mount Device (SMD) operates at 3.3V supply voltage with ±50ppm frequency stability across the -40°C to 85°C temperature range. The part is Active status and ROHS3 compliant, making it suitable for modern electronic applications. Identifying equivalent substitute parts ensures design flexibility, supply chain continuity, and access to alternative inventory sources when the primary part becomes unavailable.

Substiute Parts

FDC500020

Diodes IncorporatedIn Stock: 875FDC500020 Datasheet

Current PartRFQ

SXO53C3A481-125.000M

Suntsu Electronics, Inc.In Stock: 1959SXO53C3A481-125.000M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FDC500020 are qualified based on the following critical parameters that must match or remain compatible:

• Frequency: 125 MHz (exact match required)
• Output Configuration: CMOS output
• Supply Voltage: 3.3V
• Frequency Stability: ±50ppm
• Operating Temperature Range: -40°C ~ 85°C
• Function: Enable/Disable capability
• Package: 4-SMD, No Lead form factor
• Mounting: Surface Mount
• Compliance: ROHS3 Compliant

The SXO53C3A481-125.000M from Suntsu Electronics, Inc. meets all these critical parameters and qualifies as a direct substitute for the FDC500020.

Parameter Comparison

Engineering Selection Recommendations

Both the FDC500020 and SXO53C3A481-125.000M are Active status products with ROHS3 compliance and EAR99 export classification. The SXO53C3A481-125.000M presents a viable substitute with identical electrical specifications and package footprint. The maximum supply current differs slightly (50mA vs. 45mA), and the seated height tolerance is marginally higher (1.40mm vs. 1.30mm), both within acceptable design margins for standard PCB layouts. Selection between these parts should be based on availability, lead time, and inventory requirements rather than technical performance differences.

Frequently Asked Questions (FAQ)

Q: Can the SXO53C3A481-125.000M be used as a direct replacement for the FDC500020?

A: Yes. Both parts share identical frequency (125 MHz), output type (CMOS), supply voltage (3.3V), frequency stability (±50ppm), operating temperature range (-40°C ~ 85°C), enable/disable function, and 4-SMD No Lead package. The minor differences in maximum supply current (50mA vs. 45mA) and seated height (1.40mm vs. 1.30mm) do not affect functional compatibility.

Q: Are there any PCB layout considerations when substituting these parts?

A: The parts share identical footprint dimensions (5.00mm x 3.20mm). The seated height difference of 0.05mm (1.40mm vs. 1.30mm) is negligible for standard surface mount assembly processes and does not require PCB redesign.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the FDC500020 and SXO53C3A481-125.000M are ROHS3 compliant, carry EAR99 export classification, and share the same HTSUS code (8542.39.0001).

Q: What is the difference in supply current between these parts?

A: The FDC500020 has a maximum supply current of 45mA, while the SXO53C3A481-125.000M has a maximum of 50mA. This 5mA difference is within typical design margins and does not impact circuit performance in standard applications.

Q: Are both parts currently available?

A: Both parts are listed as Active status. Inventory availability varies by distributor and time. The FDC500020 has 792 pieces in stock, while the SXO53C3A481-125.000M has 1880 pieces available.