CS20-22.1184MABJ-UT Equivalent & Substitute Parts

Part Overview

The CS20-22.1184MABJ-UT is a 22.1184 MHz crystal oscillator manufactured by Citizen Finedevice Co Ltd, designed for surface mount applications requiring fundamental mode operation. This component operates across a temperature range of -10°C to 60°C with a load capacitance of 18pF and an equivalent series resistance of 50 Ohms. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

CS20-22.1184MABJ-UT

Citizen Finedevice Co LtdIn Stock: 728CS20-22.1184MABJ-UT Datasheet

Current PartRFQ

ABC2-22.1184MHZ-4-T

Abracon LLCIn Stock: 806ABC2-22.1184MHZ-4-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS20-22.1184MABJ-UT is determined by the following critical parameters:

• Frequency Match: 22.1184 MHz (exact match required)
• Frequency Tolerance: ±30ppm (maximum allowable deviation)
• Load Capacitance: 18pF (circuit design requirement)
• Operating Mode: Fundamental (circuit topology requirement)
• Package / Case: 4-SMD, No Lead (PCB layout compatibility)
• Operating Temperature Range: -10°C to 60°C (minimum required coverage)

The ABC2-22.1184MHZ-4-T from Abracon LLC meets all substitution criteria. While the ESR differs (30 Ohms versus 50 Ohms), this represents an improvement in electrical performance and remains within acceptable circuit design parameters for this frequency class.

Parameter Comparison

Engineering Selection Recommendations

The ABC2-22.1184MHZ-4-T is a direct functional substitute for the CS20-22.1184MABJ-UT. Selection of the Abracon component is supported by the following factors:

• Product Status: The Abracon part maintains active production status, ensuring long-term availability and supply chain stability compared to the obsolete Citizen component.
• Compliance: The ABC2-22.1184MHZ-4-T is ROHS3 compliant and REACH affected, meeting current regulatory requirements for electronic components in most jurisdictions.
• Electrical Performance: The lower ESR (30 Ohms) of the Abracon part provides improved circuit performance characteristics while maintaining identical frequency, tolerance, load capacitance, and operating temperature specifications.
• Physical Compatibility: Dimensional differences are minimal. The Abracon part is slightly larger in length (0.465" versus 0.457") and lower in height (0.079" versus 0.087"), both variations within typical PCB layout tolerances for 4-SMD packages.

Frequently Asked Questions (FAQ)

Q: Can the ABC2-22.1184MHZ-4-T be used as a direct replacement without circuit modifications?

A: Yes. Both parts share identical frequency (22.1184 MHz), frequency tolerance (±30ppm), load capacitance (18pF), operating mode (Fundamental), and temperature range (-10°C to 60°C). The lower ESR of the Abracon part represents improved performance and does not require circuit redesign.

Q: What is the significance of the ESR difference between the two parts?

A: ESR (Equivalent Series Resistance) affects crystal startup characteristics and power consumption. The ABC2-22.1184MHZ-4-T ESR of 30 Ohms is lower than the CS20-22.1184MABJ-UT ESR of 50 Ohms, resulting in faster oscillation startup and reduced power draw. This is a performance improvement for the application.

Q: Are there physical compatibility concerns with the dimensional differences?

A: The dimensional variations are minor. The Abracon part is 0.008" longer in length and 0.008" shorter in height. These differences fall within standard PCB layout tolerances for 4-SMD, No Lead packages and do not present mechanical compatibility issues.

Q: What compliance certifications should be considered when selecting between these parts?

A: The ABC2-22.1184MHZ-4-T is ROHS3 compliant and REACH affected, meeting current environmental and regulatory standards. The CS20-22.1184MABJ-UT is listed as REACH unaffected. For new designs or applications subject to ROHS3 or REACH requirements, the Abracon part is the appropriate selection.

Q: Why is the Citizen part classified as obsolete?

A: Obsolescence indicates that the manufacturer has discontinued production. The Abracon ABC2-22.1184MHZ-4-T provides functional equivalence with active production status, ensuring procurement availability for current and future applications.