X2FCCLNANF-25.000000 Equivalent & Substitute Parts

Part Overview

The X2FCCLNANF-25.000000 is a 25 MHz fundamental mode crystal oscillator manufactured by Taitien, designed for surface mount applications in 4-SMD, No Lead package. This part operates across the industrial temperature range of -40°C to 85°C with ±20ppm frequency stability and carries ROHS3 compliance. The product is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	X2FCCLNANF-25.000000
Manufacturer	Taitien
Frequency	25 MHz
Frequency Stability	±20ppm
Load Capacitance	16pF
ESR (Equivalent Series Resistance)	70 Ohms
Operating Temperature Range	-40°C to 85°C
Mounting Type	Surface Mount
Package / Case	4-SMD, No Lead
Size / Dimension	0.126" L x 0.098" W (3.20mm x 2.50mm)
Height - Seated (Max)	0.035" (0.90mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the X2FCCLNANF-25.000000 is determined by the following critical parameters:

Primary Matching Criteria:

Frequency: 25 MHz (exact match required)
Frequency Stability: ±20ppm (exact match required)
Operating Temperature Range: -40°C to 85°C (exact match required)
Mounting Type: Surface Mount (exact match required)
Package / Case: 4-SMD, No Lead (exact match required)

Secondary Compatibility Parameters:

Load Capacitance: 16pF to 20pF range acceptable with circuit design verification
ESR (Equivalent Series Resistance): 40 to 100 Ohms acceptable with circuit design verification
Physical Dimensions: 3.20mm x 2.50mm footprint preferred; 2.00mm x 1.60mm footprint acceptable with PCB layout adjustment
RoHS Status: ROHS3 Compliant or RoHS Compliant required
Moisture Sensitivity Level: 1 (Unlimited) preferred

Substitute parts are grouped based on load capacitance variations and ESR specifications, as these parameters directly affect circuit oscillation characteristics and must be evaluated against the original circuit design requirements.

Parameter Comparison

Part Number	Manufacturer	Frequency	Frequency Stability	Load Capacitance	ESR (Ohms)	Operating Temperature	Package	Size (mm)	Height (mm)	RoHS Status	Product Status
X2FCCLNANF-25.000000	Taitien	25 MHz	±20ppm	16pF	70	-40°C to 85°C	4-SMD, No Lead	3.20 x 2.50	0.90	ROHS3	Obsolete
XXHCCLNANF-25.000000	Taitien	25 MHz	±20ppm	20pF	60	-40°C to 85°C	4-SMD, No Lead	3.20 x 2.50	0.90	ROHS3	Active
402F25022IDR	CTS-Frequency Controls	25 MHz	±20ppm	18pF	100	-40°C to 85°C	4-SMD, No Lead	2.00 x 1.60	0.55	ROHS3	Active
402F25022ILR	CTS-Frequency Controls	25 MHz	±20ppm	12pF	100	-40°C to 85°C	4-SMD, No Lead	2.00 x 1.60	0.55	ROHS3	Active
7M-25.000MDIJ-T	TXC CORPORATION	25 MHz	±20ppm	18pF	60	-40°C to 85°C	4-SMD, No Lead	3.20 x 2.50	0.80	RoHS	Active
7M25000150	TXC CORPORATION	25 MHz	±20ppm	18pF	—	-40°C to 85°C	4-SMD, No Lead	3.20 x 2.50	0.80	RoHS	Active
7M25077010	TXC CORPORATION	25 MHz	±20ppm	18pF	—	-40°C to 85°C	4-SMD, No Lead	3.20 x 2.50	0.80	RoHS	Active
ABM8-25.000MHZ-D2X-T	Abracon LLC	25 MHz	±20ppm	18pF	50	-40°C to 85°C	4-SMD, No Lead	3.20 x 2.50	0.80	ROHS3	Active
ECS-250-18-33-JTN-TR	ECS Inc.	25 MHz	±20ppm	18pF	40	-40°C to 85°C	4-SMD, No Lead	3.20 x 2.50	0.80	ROHS3	Active
ECS-250-20-33-JTN-TR	ECS Inc.	25 MHz	±20ppm	20pF	40	-40°C to 85°C	4-SMD, No Lead	3.20 x 2.50	0.80	ROHS3	Active
FL2500133	Diodes Incorporated	25 MHz	±20ppm	18pF	40	-40°C to 85°C	4-SMD, No Lead	3.20 x 2.50	0.75	ROHS3	Active

Engineering Selection Recommendations

Tier 1 - Direct Footprint Compatible (3.20mm x 2.50mm):

The following parts maintain identical physical dimensions and footprint compatibility with the X2FCCLNANF-25.000000:

XXHCCLNANF-25.000000 (Taitien): Active product status with 20pF load capacitance and 60 Ohms ESR. ROHS3 compliant. Recommended for designs where 20pF load capacitance is acceptable.
7M-25.000MDIJ-T (TXC CORPORATION): Active product status with 18pF load capacitance and 60 Ohms ESR. RoHS compliant. Recommended for designs where 18pF load capacitance is acceptable.
7M25000150 (TXC CORPORATION): Active product status with 18pF load capacitance. RoHS compliant. Recommended for designs where 18pF load capacitance is acceptable.
7M25077010 (TXC CORPORATION): Active product status with 18pF load capacitance. RoHS compliant. Recommended for designs where 18pF load capacitance is acceptable.
ABM8-25.000MHZ-D2X-T (Abracon LLC): Active product status with 18pF load capacitance and 50 Ohms ESR. ROHS3 compliant. Recommended for designs where 18pF load capacitance is acceptable.
ECS-250-18-33-JTN-TR (ECS Inc.): Active product status with 18pF load capacitance and 40 Ohms ESR. ROHS3 compliant. Recommended for designs where 18pF load capacitance is acceptable.
ECS-250-20-33-JTN-TR (ECS Inc.): Active product status with 20pF load capacitance and 40 Ohms ESR. ROHS3 compliant. Recommended for designs where 20pF load capacitance is acceptable.
FL2500133 (Diodes Incorporated): Active product status with 18pF load capacitance and 40 Ohms ESR. ROHS3 compliant. Recommended for designs where 18pF load capacitance is acceptable.

Tier 2 - Compact Footprint (2.00mm x 1.60mm):

The following parts feature a smaller physical footprint and require PCB layout adjustment:

402F25022IDR (CTS-Frequency Controls): Active product status with 18pF load capacitance and 100 Ohms ESR. ROHS3 compliant. Suitable for space-constrained applications.
402F25022ILR (CTS-Frequency Controls): Active product status with 12pF load capacitance and 100 Ohms ESR. ROHS3 compliant. Suitable for space-constrained applications where 12pF load capacitance is acceptable.

All substitute parts maintain the required 25 MHz frequency, ±20ppm frequency stability, -40°C to 85°C operating temperature range, and 4-SMD No Lead package configuration. Load capacitance and ESR variations require circuit design verification to ensure oscillation stability and frequency accuracy within the target application.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with different load capacitance than the original X2FCCLNANF-25.000000?

A: Load capacitance affects the oscillation frequency and circuit stability. The original part specifies 16pF. Substitute parts with 18pF, 20pF, or 12pF load capacitance require circuit design verification. The oscillator circuit must be evaluated to confirm that frequency accuracy remains within acceptable limits with the alternative load capacitance value.

Q: What is the impact of ESR (Equivalent Series Resistance) differences?

A: ESR affects the crystal's ability to sustain oscillation and influences circuit startup characteristics. The original part specifies 70 Ohms. Substitute parts range from 40 to 100 Ohms. Lower ESR values (40-50 Ohms) generally provide better oscillation margin, while higher ESR values (100 Ohms) may require circuit optimization to ensure reliable startup across the operating temperature range.

Q: Are the compact footprint parts (2.00mm x 1.60mm) directly interchangeable?

A: No. The CTS-Frequency Controls 402 series parts feature a smaller footprint (2.00mm x 1.60mm) compared to the original 3.20mm x 2.50mm dimensions. PCB layout modification is required, including pad repositioning and trace routing adjustments. Mechanical clearance verification is necessary before implementation.

Q: Which substitute parts offer the best compliance status?

A: All listed substitute parts are ROHS3 compliant or RoHS compliant. Parts marked ROHS3 compliant (XXHCCLNANF-25.000000, 402F25022IDR, 402F25022ILR, ABM8-25.000MHZ-D2X-T, ECS-250-18-33-JTN-TR, ECS-250-20-33-JTN-TR, FL2500133) meet the most current regulatory requirements. Parts marked RoHS compliant (7M-25.000MDIJ-T, 7M25000150, 7M25077010) meet baseline RoHS requirements.

Q: What is the Moisture Sensitivity Level (MSL) consideration?

A: The original part and most substitute parts specify MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. The ABM8-25.000MHZ-D2X-T specifies MSL as Not Applicable. Both conditions are acceptable for standard PCB assembly processes without special moisture control requirements.

Q: Should I prioritize active product status when selecting a substitute?

A: Yes. The original X2FCCLNANF-25.000000 is obsolete. All listed substitute parts carry active product status, ensuring ongoing availability and manufacturing support. Active status provides design continuity and reduces future procurement risk.

Q: Can I use multiple substitute parts interchangeably in the same design?

A: No. Each substitute part has distinct load capacitance and ESR specifications. Once a substitute part is selected and the circuit is validated with that specific part's characteristics, that part number should be maintained for production consistency. Changing between substitute parts requires circuit re-evaluation and potential design adjustments.

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