FD4000120 Equivalent & Substitute Parts

Part Overview

The FD4000120 is a 40 MHz crystal oscillator manufactured by Diodes Incorporated, designed for applications requiring a standard XO (Standard) CMOS output with enable/disable functionality. This Surface Mount Device (SMD) operates at 3.3V supply voltage and is housed in a compact 4-SMD, No Lead package measuring 5.00mm x 3.20mm. The part is currently Active in product status with full RoHS3 compliance and REACH unaffected certification. Equivalent substitute parts are identified to provide design flexibility, inventory alternatives, and supply chain options while maintaining electrical and mechanical compatibility.

Substiute Parts

FD4000120

Diodes IncorporatedIn Stock: 1139FD4000120 Datasheet

Current PartRFQ

SXO53C3C271-40.000M

Suntsu Electronics, Inc.In Stock: 2134SXO53C3C271-40.000M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FD4000120 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

• Frequency Match: 40 MHz (exact match required)
• Output Configuration: CMOS output with Enable/Disable function
• Supply Voltage: 3.3V operation
• Frequency Stability: ±25ppm tolerance
• Operating Temperature Range: -20°C ~ 70°C
• Package Type: 4-SMD, No Lead configuration
• Package Dimensions: 5.00mm x 3.20mm footprint
• Compliance: RoHS3 Compliant, REACH Unaffected

The SXO53C3C271-40.000M from Suntsu Electronics, Inc. meets all these critical parameters and qualifies as a direct substitute for the FD4000120.

Parameter Comparison

Engineering Selection Recommendations

Both the FD4000120 and SXO53C3C271-40.000M are Active products with full RoHS3 compliance and REACH unaffected status, making them suitable for current production designs. The primary difference is maximum supply current: the FD4000120 specifies 15mA maximum, while the SXO53C3C271-40.000M specifies 25mA maximum. This difference must be evaluated against circuit power budget requirements. The seated height difference of 0.10mm (1.30mm versus 1.40mm) is negligible for most PCB assembly applications. Both parts share identical frequency, output type, supply voltage, stability, operating temperature range, and package footprint, confirming mechanical and electrical interchangeability within the specified parameters.

Frequently Asked Questions (FAQ)

Q: Can the SXO53C3C271-40.000M directly replace the FD4000120 in existing designs?

A: Yes, the SXO53C3C271-40.000M is mechanically and electrically compatible with the FD4000120. Both parts share identical frequency (40 MHz), output type (CMOS), supply voltage (3.3V), enable/disable function, frequency stability (±25ppm), operating temperature range (-20°C ~ 70°C), and package footprint (5.00mm x 3.20mm, 4-SMD No Lead). The maximum supply current specification differs (15mA vs. 25mA), which must be considered in power budget calculations.

Q: What are the key parameters that determine substitutability for this oscillator?

A: Substitutability is determined by: frequency (40 MHz), output configuration (CMOS with Enable/Disable), supply voltage (3.3V), frequency stability (±25ppm), operating temperature range (-20°C ~ 70°C), package type (4-SMD, No Lead), and package footprint (5.00mm x 3.20mm). All these parameters must match for direct substitution.

Q: Are there any height clearance concerns when substituting these parts?

A: The seated height difference is 0.10mm (FD4000120 at 1.30mm maximum versus SXO53C3C271-40.000M at 1.40mm maximum). This minimal difference is typically not a concern for standard PCB assembly applications, but should be verified against specific board design constraints if height-critical applications are involved.

Q: Do both parts meet current regulatory requirements?

A: Yes, both the FD4000120 and SXO53C3C271-40.000M are RoHS3 Compliant and REACH Unaffected, meeting current regulatory standards for electronic component manufacturing and use.

Q: What is the significance of the Enable/Disable function in these oscillators?

A: The Enable/Disable function allows the oscillator output to be controlled via an external signal, enabling power management and reducing current consumption when the oscillator output is not required. Both substitute parts provide this functionality.