FK4000032 40 MHz CMOS Oscillator Equivalent & Substitute Parts

Part Overview

The FK4000032 is a 40 MHz XO (Standard) CMOS oscillator manufactured by Diodes Incorporated, designed for applications requiring a stable crystal-based frequency reference 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 3.20mm x 2.50mm. The part is Active in product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), making it suitable for standard industrial and commercial applications. Identifying equivalent substitute parts is essential for supply chain continuity, inventory optimization, and ensuring design flexibility across manufacturing cycles.

Substiute Parts

FK4000032

Diodes IncorporatedIn Stock: 989FK4000032 Datasheet

Current PartRFQ

SXO32C3C271-40.000M

Suntsu Electronics, Inc.In Stock: 1735SXO32C3C271-40.000M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FK4000032 is determined by strict alignment across the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 40 MHz (exact match required)
• Output Type: CMOS (signal format compatibility)
• Supply Voltage: 3.3V (power supply compatibility)
• Function: Enable/Disable (operational feature requirement)
• Package Type: 4-SMD, No Lead (mechanical and electrical interface)
• Package Dimensions: 3.20mm x 2.50mm (PCB layout compatibility)
• Frequency Stability: ±25ppm (timing accuracy specification)
• Operating Temperature Range: -20°C ~ 70°C (environmental operating window)

The SXO32C3C271-40.000M from Suntsu Electronics, Inc. meets all mandatory matching parameters and qualifies as a direct substitute. Both parts share identical frequency, output characteristics, supply voltage, enable/disable functionality, and physical package specifications. Compliance certifications (ROHS3, EAR99, HTSUS classification) are equivalent across both parts.

Parameter Comparison

Engineering Selection Recommendations

Both the FK4000032 and SXO32C3C271-40.000M are Active product status components with ROHS3 compliance and equivalent regulatory classifications (EAR99, HTSUS 8542.39.0001). Selection between these parts should be based on:

Supply Chain Availability: The SXO32C3C271-40.000M currently has higher inventory availability (1686 Pcs vs. 908 Pcs), making it advantageous for large-volume production runs or extended lead-time mitigation.

Power Consumption Consideration: The Suntsu part (SXO32C3C271-40.000M) specifies a maximum supply current of 17mA compared to the Diodes part at 10mA. Designs with strict power budgets should verify that the additional 7mA current draw does not exceed system-level power supply margins or thermal constraints.

Physical Clearance: The Suntsu part has a maximum seated height of 1.20mm versus 1.15mm for the Diodes part. Verify PCB layout clearance for components or connectors positioned above the oscillator to ensure no mechanical interference.

Disable Mode Current: The Diodes FK4000032 specifies disable mode current at 10µA; the Suntsu part does not provide this specification. For applications requiring low-power standby operation, the Diodes part offers documented performance data.

Both parts are suitable for direct substitution in applications where the specified parameters align with design requirements.

Frequently Asked Questions (FAQ)

Q: Can the SXO32C3C271-40.000M replace the FK4000032 in existing designs?

A: Yes, the SXO32C3C271-40.000M is a direct substitute. 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 to 70°C), and package specifications (4-SMD, No Lead, 3.20mm x 2.50mm). No circuit modifications are required for pin-compatible substitution.

Q: What are the differences in current consumption between these parts?

A: The FK4000032 specifies a maximum supply current of 10mA, while the SXO32C3C271-40.000M specifies 17mA. The Suntsu part also does not provide disable mode current specification, whereas the Diodes part specifies 10µA in disable mode. Designs with power-sensitive applications should account for the higher active current draw of the Suntsu part.

Q: Are there physical mounting differences?

A: Both parts use identical 4-SMD, No Lead packaging with 3.20mm x 2.50mm footprints. The maximum seated height differs slightly: FK4000032 at 1.15mm and SXO32C3C271-40.000M at 1.20mm. This 0.05mm difference is negligible for most applications but should be verified if components are mounted in close proximity to other board-level elements.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the FK4000032 and SXO32C3C271-40.000M are ROHS3 compliant with identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. Both parts are Active in product status, ensuring ongoing manufacturer support and supply availability.

Q: Which part should be selected for new designs?

A: Selection depends on supply chain priorities and design constraints. The SXO32C3C271-40.000M offers higher current inventory availability. The FK4000032 provides lower active current consumption (10mA vs. 17mA) and documented disable mode current specification (10µA). Evaluate power budget requirements and lead-time considerations for your specific application.

Q: Is the frequency stability specification identical?

A: Yes. Both parts specify ±25ppm frequency stability across the operating temperature range of -20°C to 70°C, ensuring equivalent timing accuracy for applications requiring this stability class.