125 MHz CMOS Crystal Oscillator XO (7CA2502001) Equivalent & Substitute Parts

Part Overview

The TXC CORPORATION 7CA2502001 is a 125 MHz CMOS crystal oscillator with 3.3V supply, enable/disable function, and 4-SMD surface mount packaging. This part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The oscillator operates across the industrial temperature range of -40°C to 85°C with ±50ppm frequency stability and is RoHS compliant with MSL 1 moisture sensitivity rating.

Key Parameters

Parameter	Specification
Frequency	125 MHz
Output Type	CMOS
Supply Voltage	3.3V
Function	Enable/Disable
Frequency Stability	±50ppm
Operating Temperature Range	-40°C to 85°C
Package Type	4-SMD, No Lead
Physical Dimensions	5.00mm L × 3.20mm W
Maximum Height	1.40mm
Mounting Type	Surface Mount
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 7CA2502001 are qualified based on strict parameter matching across the following critical criteria:

Mandatory Matching Parameters:

Frequency: 125 MHz
Output: CMOS
Supply Voltage: 3.3V
Function: Enable/Disable
Frequency Stability: ±50ppm
Operating Temperature: -40°C to 85°C
Package/Case: 4-SMD, No Lead
Physical Dimensions: 5.00mm × 3.20mm
Mounting Type: Surface Mount

All three substitute parts meet these mandatory parameters. Variations in current supply specifications, packaging format (Tape & Reel vs. Bulk), and product status (Active vs. Obsolete) do not affect functional equivalence for circuit-level substitution. Maximum height differences within 0.12mm (1.40mm vs. 1.28mm) remain within typical PCB assembly tolerances for 4-SMD packages.

Parameter Comparison

Parameter	7CA2502001 (Main)	7C-125.000MBE-T	510CAA125M000BAGR	SXO53C3A481-125.000M
Manufacturer	TXC CORPORATION	TXC CORPORATION	Skyworks Solutions Inc.	Suntsu Electronics, Inc.
Product Status	Obsolete	Active	Active	Active
Frequency	125 MHz	125 MHz	125 MHz	125 MHz
Output	CMOS	CMOS	CMOS	CMOS
Supply Voltage	3.3V	3.3V	3.3V	3.3V
Function	Enable/Disable	Enable/Disable	Enable/Disable	Enable/Disable
Frequency Stability	±50ppm	±50ppm	±50ppm	±50ppm
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Package/Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Dimensions	5.00mm × 3.20mm	5.00mm × 3.20mm	5.00mm × 3.20mm	5.00mm × 3.20mm
Max Height	1.40mm	1.40mm	1.28mm	1.40mm
Current Supply (Max)	Not specified	30mA	26mA	50mA
RoHS Status	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant
MSL Rating	MSL 1	MSL 1	MSL 1	Not specified
Packaging Format	Not specified	Tape & Reel (TR)	Tape & Reel (TR)	Bulk

Engineering Selection Recommendations

Primary Recommendation: 7C-125.000MBE-T

The 7C-125.000MBE-T is the parametric equivalent from the same manufacturer (TXC CORPORATION). This part carries Active product status, ensuring long-term availability and supply chain continuity. It maintains identical electrical specifications and physical dimensions to the obsolete 7CA2502001. Tape & Reel packaging is standard for production environments. RoHS compliance and MSL 1 rating match the original specification.

Secondary Recommendation: 510CAA125M000BAGR

The Skyworks Solutions Inc. 510CAA125M000BAGR meets all mandatory electrical and mechanical parameters. This part is Active and widely available. The maximum height of 1.28mm is 0.12mm lower than the original, which remains within standard PCB assembly tolerances for 4-SMD packages. Current supply specification (26mA maximum) is lower than the Suntsu alternative, potentially offering improved power efficiency. Tape & Reel packaging supports production workflows.

Tertiary Recommendation: SXO53C3A481-125.000M

The Suntsu Electronics SXO53C3A481-125.000M provides full electrical equivalence with Active product status. Maximum current supply specification (50mA) is higher than competing alternatives. This part is available in Bulk packaging format. ROHS3 compliance exceeds RoHS baseline requirements. Physical dimensions and height match the original specification exactly.

All three substitutes are suitable for direct replacement in circuit designs. Selection among them should be based on procurement availability, packaging requirements (Tape & Reel vs. Bulk), and power budget constraints.

Frequently Asked Questions (FAQ)

Q: Can the 7C-125.000MBE-T directly replace the obsolete 7CA2502001?

A: Yes. The 7C-125.000MBE-T is a parametric equivalent with identical frequency (125 MHz), output type (CMOS), supply voltage (3.3V), enable/disable function, frequency stability (±50ppm), operating temperature range (-40°C to 85°C), and 4-SMD package dimensions (5.00mm × 3.20mm). Both parts are from TXC CORPORATION and share the same series designation (7C).

Q: What is the difference between Tape & Reel and Bulk packaging?

A: Tape & Reel (TR) packaging is standard for automated pick-and-place assembly in production environments, with parts wound on continuous tape for machine feeding. Bulk packaging contains loose components suitable for manual assembly or lower-volume applications. Electrical and mechanical specifications are identical; packaging format affects only handling and assembly methodology.

Q: Are there height differences between substitute parts?

A: The 510CAA125M000BAGR has a maximum seated height of 1.28mm, compared to 1.40mm for the original 7CA2502001 and the other substitutes. This 0.12mm difference is within standard PCB assembly tolerances for 4-SMD packages and does not affect circuit functionality or board layout compatibility.

Q: What does MSL 1 (Unlimited) moisture sensitivity mean?

A: MSL 1 indicates the lowest moisture sensitivity level, meaning the component can be stored indefinitely without moisture bake-out requirements prior to soldering. This simplifies inventory management and reduces handling constraints compared to higher MSL ratings.

Q: Do all substitutes meet RoHS compliance?

A: Yes. The 7C-125.000MBE-T and 510CAA125M000BAGR carry RoHS Compliant certification. The SXO53C3A481-125.000M carries ROHS3 Compliant certification, which represents an enhanced compliance standard. All three parts are suitable for applications requiring RoHS compliance.

Q: What is the significance of ±50ppm frequency stability?

A: Frequency stability of ±50ppm indicates the maximum deviation of the oscillator output frequency from the nominal 125 MHz specification across the operating temperature range (-40°C to 85°C) and over the component lifetime. This specification is identical across all substitute parts and the original component.

Q: Can I use the SXO53C3A481-125.000M in high-current applications?

A: The SXO53C3A481-125.000M has a maximum supply current specification of 50mA, which is higher than the 7C-125.000MBE-T (30mA) and 510CAA125M000BAGR (26mA). If your circuit requires higher current draw, the Suntsu part provides additional margin. However, all three parts are functionally equivalent for standard 125 MHz CMOS oscillator applications.

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