FN2500171 Equivalent & Substitute Parts

Part Overview

The FN2500171 is a 25 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 part is Active status and widely used in timing-critical applications requiring stable frequency generation. Substitute parts are identified when design requirements change, inventory constraints occur, or alternative sourcing becomes necessary while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Frequency	25 MHz
Output Type	CMOS
Supply Voltage	3.3V
Function	Enable/Disable
Package Type	4-SMD, No Lead
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 85°C
Frequency Stability	±25ppm
Maximum Supply Current	15mA
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the FN2500171 is determined by the following critical parameters: frequency (25 MHz), output type (CMOS), supply voltage (3.3V), enable/disable function, package configuration (4-SMD, No Lead), and surface mount capability. All identified substitutes maintain these core electrical and mechanical specifications. Frequency stability, supply current, and operating temperature range are secondary parameters that may vary within acceptable limits for specific applications. Packaging format (Bulk vs. Tape & Reel) and manufacturer differences do not affect functional compatibility but may impact procurement and assembly workflows.

Parameter Comparison

Parameter	FN2500171	FN2500161	FNETHE025	SXO75C3C481-25.000M
Manufacturer	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated	Suntsu Electronics, Inc.
Frequency	25 MHz	25 MHz	25 MHz	25 MHz
Output Type	CMOS	CMOS	CMOS	CMOS
Supply Voltage	3.3V	3.3V	3.3V	3.3V
Function	Enable/Disable	Enable/Disable	Enable/Disable	Enable/Disable
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Size / Dimension	0.276" L x 0.197" W (7.00mm x 5.00mm)	0.276" L x 0.197" W (7.00mm x 5.00mm)	0.276" L x 0.197" W (7.00mm x 5.00mm)	0.276" L x 0.197" W (7.00mm x 5.00mm)
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-20°C ~ 70°C	-40°C ~ 85°C
Frequency Stability	±25ppm	±50ppm	±25ppm	±25ppm
Maximum Supply Current	15mA	15mA	15mA	16mA
Height - Seated (Max)	0.071" (1.80mm)	0.071" (1.80mm)	0.061" (1.55mm)	0.063" (1.60mm)
Current - Supply (Disable) (Max)	10µA	10µA	10µA	Not specified
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All four parts maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance. The FN2500171 and FNETHE025 share identical frequency stability (±25ppm), making them direct functional equivalents for applications requiring tighter tolerance control. The FN2500161 operates at ±50ppm stability and is suitable for applications with relaxed frequency tolerance requirements. The SXO75C3C481-25.000M from Suntsu Electronics provides cross-manufacturer compatibility with equivalent electrical performance and identical package dimensions. Height variations (1.55mm to 1.80mm) are within typical PCB assembly tolerances and do not affect functional compatibility. Selection should prioritize inventory availability, packaging format requirements (Bulk vs. Tape & Reel), and operating temperature range constraints specific to the application environment.

Frequently Asked Questions (FAQ)

Q: Can FN2500161 replace FN2500171 directly on the PCB? A: Yes. Both parts share identical package dimensions (7.00mm x 5.00mm), pin configuration (4-SMD, No Lead), supply voltage (3.3V), and enable/disable function. The primary difference is frequency stability (±50ppm vs. ±25ppm). Selection depends on application tolerance requirements.

Q: What is the difference between Bulk and Tape & Reel packaging? A: Bulk packaging (FN2500171, FN2500161, SXO75C3C481-25.000M) is suitable for small-volume or prototype applications. Tape & Reel packaging (FNETHE025) is optimized for high-volume automated assembly. Both formats contain identical components; packaging affects procurement and assembly workflow only.

Q: Is FNETHE025 compatible with designs using FN2500171? A: Yes. FNETHE025 is electrically and mechanically compatible. It offers identical frequency stability (±25ppm) and operating temperature range (-40°C ~ 85°C). The seated height is slightly lower (1.55mm vs. 1.80mm), which is within standard PCB assembly tolerances.

Q: Can the Suntsu SXO75C3C481-25.000M be used as a substitute? A: Yes. The SXO75C3C481-25.000M provides cross-manufacturer compatibility with equivalent electrical specifications (25 MHz, CMOS, 3.3V, ±25ppm stability) and identical package footprint. Maximum supply current is 16mA (vs. 15mA), which is within acceptable operating margins.

Q: Which substitute is best for high-temperature applications? A: Both FN2500171 and SXO75C3C481-25.000M support the full -40°C ~ 85°C operating range. FNETHE025 is limited to -20°C ~ 70°C and is not suitable for extended temperature environments.

Q: Are all substitutes RoHS compliant? A: Yes. All four parts (FN2500171, FN2500161, FNETHE025, SXO75C3C481-25.000M) are ROHS3 compliant and meet regulatory requirements for restricted substance use.

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