FN4000159 Equivalent & Substitute Parts

Part Overview

The FN4000159 is a 40 MHz crystal oscillator manufactured by Diodes Incorporated, part of the SaRonix-eCera™ FN series. This CMOS oscillator operates at 3.3V with enable/disable functionality and is housed in a 4-SMD, No Lead package. The device is actively produced and ROHS3 compliant, making it suitable for modern electronic applications requiring precise frequency generation. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity.

Substiute Parts

FN4000159

Diodes IncorporatedIn Stock: 764FN4000159 Datasheet

Current PartRFQ

FN4000157

Diodes IncorporatedIn Stock: 947FN4000157 Datasheet

MFR RecommendedRFQ

SXO75C3A481-40.000M

Suntsu Electronics, Inc.In Stock: 1662SXO75C3A481-40.000M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FN4000159 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Core Electrical Parameters:

• Frequency: 40 MHz (exact match required)
• Output Type: CMOS (exact match required)
• Supply Voltage: 3.3V (exact match required)
• Function: Enable/Disable (exact match required)
• Frequency Stability: ±50ppm (exact match required)
• Maximum Supply Current: 25mA (exact match required)

Mechanical Parameters:

• Package Type: 4-SMD, No Lead (exact match required)
• Package Dimensions: 7.00mm x 5.00mm (exact match required)
• Maximum Seated Height: 1.80mm (exact match or lower acceptable)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Operating Temperature Range: Substitutes must support the application's required temperature range. The FN4000159 operates from -40°C to 85°C. Substitutes with narrower ranges may be acceptable if the application operates within the substitute's specified range.

Parameter Comparison

Engineering Selection Recommendations

FN4000157 (Diodes Incorporated): This part is a manufacturer-recommended substitute from the same series. It matches all critical electrical parameters and package specifications. The operating temperature range is -20°C to 70°C, which is narrower than the FN4000159. Selection of this part is appropriate only when the application operates within this temperature window. Both parts carry ROHS3 compliance and MSL 1 rating.

SXO75C3A481-40.000M (Suntsu Electronics, Inc.): This part is a direct cross-reference substitute from an alternative manufacturer. It matches all critical electrical parameters and maintains identical package dimensions. The operating temperature range is -40°C to 85°C, matching the FN4000159. The maximum seated height is 1.60mm, which is lower than the FN4000159's 1.80mm, providing improved PCB clearance. ROHS3 compliance is confirmed. This part is suitable for applications requiring the full temperature range of the original part.

Frequently Asked Questions (FAQ)

Q: Can FN4000157 be used as a direct replacement for FN4000159?

A: FN4000157 is electrically and mechanically compatible with FN4000159 for applications operating within the temperature range of -20°C to 70°C. If your application requires operation below -20°C or above 70°C, FN4000157 is not suitable. Verify your application's operating temperature requirements before selection.

Q: What is the difference between FN4000159 and SXO75C3A481-40.000M?

A: Both parts are functionally equivalent with identical electrical specifications and package dimensions. The primary differences are manufacturer (Diodes vs. Suntsu) and seated height (1.80mm vs. 1.60mm). The Suntsu part offers a lower profile, which may be beneficial for space-constrained designs. Both support the full -40°C to 85°C temperature range.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 4-SMD, No Lead package with identical 7.00mm x 5.00mm dimensions. Pin configuration and function are identical across all three parts.

Q: Which substitute should I choose for new designs?

A: Selection depends on your specific requirements. For designs requiring the full -40°C to 85°C temperature range, both FN4000159 and SXO75C3A481-40.000M are suitable. For applications limited to -20°C to 70°C, FN4000157 is acceptable. Consider manufacturer availability, lead time, and cost when making your final selection.

Q: Are there any compliance differences between these parts?

A: All three parts are ROHS3 compliant and carry REACH Unaffected status. FN4000159 and FN4000157 both specify MSL 1 (Unlimited). SXO75C3A481-40.000M does not specify MSL in the provided data; verify with the manufacturer if moisture sensitivity level is critical for your application.