LFXTAL068911 25 MHz Crystal Equivalent & Substitute Parts

Part Overview

The LFXTAL068911 is a 25 MHz fundamental mode crystal manufactured by IQD Frequency Products in the CFPX-180 series. This surface mount device operates across the -20°C to 70°C temperature range with ±30ppm frequency tolerance and 18pF load capacitance. The component is Active status and ROHS3 compliant, suitable for precision timing applications requiring stable oscillation at 25 MHz.

Substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative manufacturers meeting equivalent electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Frequency	25.0000	MHz
Frequency Tolerance	±30	ppm
Frequency Stability	±50	ppm
Load Capacitance	18	pF
ESR (Equivalent Series Resistance)	50	Ohms
Operating Mode	Fundamental	—
Operating Temperature Range	-20 to 70	°C
Mounting Type	Surface Mount	—
Package / Case	4-SMD, No Lead	—
Size / Dimension	3.20 x 2.50	mm
Height - Seated (Max)	0.80	mm
RoHS Status	ROHS3 Compliant	—
Packaging	Tape & Reel (TR)	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment of electrical and mechanical parameters. The following criteria establish substitution categories:

Direct Substitutes meet all critical parameters: 25 MHz frequency, ±30ppm tolerance, 18pF load capacitance, 50 Ohms ESR, 4-SMD No Lead package, 3.20mm x 2.50mm footprint, and -20°C to 70°C operating range.

Similar Substitutes share the same frequency, tolerance, load capacitance, and package footprint but differ in ESR or height specifications. These parts maintain functional compatibility within the same circuit topology.

Parametric Equivalents match all primary electrical specifications and package dimensions but may have minor variations in secondary parameters such as height or moisture sensitivity rating.

Substitution logic is based exclusively on: frequency matching, frequency tolerance alignment, load capacitance compatibility, ESR tolerance, package type, physical dimensions, temperature range, and compliance certifications.

Parameter Comparison

Parameter	LFXTAL068911 (IQD)	CS11338-25M (NDK)	403C35D25M00000 (CTS)	425F35B025M0000 (CTS)	830068911 (Würth)
Manufacturer	IQD Frequency Products	NDK America, Inc.	CTS-Frequency Controls	CTS-Frequency Controls	Würth Elektronik
Part Number	LFXTAL068911	CS11338-25M	403C35D25M00000	425F35B025M0000	830068911
Series	CFPX-180	NX3225SA	403	425	WE-XTAL
Frequency	25 MHz	25 MHz	25 MHz	25 MHz	25 MHz
Frequency Tolerance	±30 ppm	±30 ppm	±30 ppm	±30 ppm	±30 ppm
Frequency Stability	±50 ppm	±50 ppm	±50 ppm	±50 ppm	±50 ppm
Load Capacitance	18 pF	18 pF	18 pF	13 pF	18 pF
ESR	50 Ohms	50 Ohms	60 Ohms	80 Ohms	50 Ohms
Operating Temperature	-20 to 70°C	-20 to 70°C	-20 to 70°C	-20 to 70°C	-20 to 70°C
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size (mm)	3.20 x 2.50	3.20 x 2.50	3.20 x 2.50	2.50 x 2.00	3.20 x 2.50
Height - Seated (Max)	0.80 mm	0.60 mm	0.80 mm	0.65 mm	0.80 mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active
Packaging Type	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility)

CS11338-25M (NDK America) and 830068911 (Würth Elektronik) are direct substitutes for LFXTAL068911. Both parts match all critical electrical parameters: 25 MHz frequency, ±30ppm tolerance, 18pF load capacitance, and 50 Ohms ESR. Physical footprints are identical at 3.20mm x 2.50mm. All three parts are Active status and ROHS3 compliant. The CS11338-25M features a lower seated height of 0.60mm compared to 0.80mm on the primary part, which may provide clearance advantages in space-constrained layouts. The 830068911 maintains identical height specifications to the LFXTAL068911.

Similar Substitutes (Conditional Compatibility)

403C35D25M00000 (CTS-Frequency Controls) shares identical frequency, tolerance, load capacitance, and package footprint specifications. The ESR specification differs at 60 Ohms versus 50 Ohms on the primary part. This 10 Ohm variance remains within acceptable tolerance for most timing applications and does not alter fundamental circuit operation. Height specification matches at 0.80mm.

425F35B025M0000 (CTS-Frequency Controls) operates at 25 MHz with ±30ppm tolerance but differs in load capacitance (13pF versus 18pF) and ESR (80 Ohms versus 50 Ohms). The physical footprint is smaller at 2.50mm x 2.00mm. This part is suitable only when circuit design accommodates the reduced load capacitance specification and higher ESR value.

Compliance and Availability

All substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the primary component. Inventory levels vary: CS11338-25M (2095 pcs), 403C35D25M00000 (7349 pcs), 425F35B025M0000 (2668 pcs), and 830068911 (6531 pcs) are available in stock.

Frequently Asked Questions (FAQ)

Q: Can CS11338-25M replace LFXTAL068911 in all applications?

A: Yes. CS11338-25M is a direct substitute meeting all electrical specifications: 25 MHz frequency, ±30ppm tolerance, 18pF load capacitance, and 50 Ohms ESR. The lower seated height (0.60mm versus 0.80mm) may provide additional PCB clearance. Both parts are ROHS3 compliant and Active status.

Q: What is the difference between the LFXTAL068911 and 403C35D25M00000?

A: Both parts operate at 25 MHz with ±30ppm tolerance and 18pF load capacitance in identical 3.20mm x 2.50mm packages. The primary difference is ESR: 403C35D25M00000 specifies 60 Ohms versus 50 Ohms on LFXTAL068911. This 10 Ohm variance does not affect circuit functionality in standard timing applications.

Q: Why is 425F35B025M0000 listed as a substitute if it has different load capacitance?

A: 425F35B025M0000 is classified as a parametric equivalent based on frequency and tolerance matching. However, the 13pF load capacitance differs from the 18pF specification of LFXTAL068911. This part is suitable only when circuit design explicitly accommodates reduced load capacitance and higher ESR (80 Ohms). Verify oscillator circuit parameters before selection.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. LFXTAL068911, CS11338-25M, 403C35D25M00000, 425F35B025M0000, and 830068911 are all supplied in Tape & Reel (TR) packaging suitable for automated assembly processes.

Q: What is the impact of ESR differences on circuit performance?

A: ESR (Equivalent Series Resistance) affects crystal startup time and power consumption. The primary part specifies 50 Ohms. Substitute 403C35D25M00000 at 60 Ohms and 425F35B025M0000 at 80 Ohms represent higher resistance values. For most standard timing applications, these variations remain within acceptable operating margins. Verify oscillator circuit design specifications if ESR-sensitive applications are involved.

Q: Can height differences affect PCB assembly?

A: Yes. CS11338-25M has a maximum seated height of 0.60mm, while LFXTAL068911, 403C35D25M00000, and 830068911 specify 0.80mm. The 0.20mm difference may impact clearance in space-constrained designs. Verify PCB layout and component placement requirements before substitution.

Q: Are all parts ROHS3 compliant?

A: Yes. LFXTAL068911, CS11338-25M, 403C35D25M00000, 425F35B025M0000, and 830068911 are all ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing.

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