CS20-6.144MABJ-UT Equivalent & Substitute Parts

Part Overview

The CS20-6.144MABJ-UT is a 6.144 MHz crystal oscillator manufactured by Citizen Finedevice Co Ltd, designed for surface mount applications requiring fundamental mode operation. This part is classified as obsolete, making identification of compatible substitute components essential for ongoing production and maintenance applications. The crystal operates at 6.144 MHz with ±30ppm frequency tolerance and 18pF load capacitance, serving as a timing reference in telecommunications and industrial equipment.

Substiute Parts

CS20-6.144MABJ-UT

Citizen Finedevice Co LtdIn Stock: 1137CS20-6.144MABJ-UT Datasheet

Current PartRFQ

ABC2-6.144MHZ-4-T

Abracon LLCIn Stock: 1034ABC2-6.144MHZ-4-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS20-6.144MABJ-UT is determined by strict equivalence across the following parameters:

• Frequency: 6.144 MHz (exact match required)
• Frequency Tolerance: ±30ppm (maximum allowable deviation)
• Load Capacitance: 18pF (exact match required)
• Operating Mode: Fundamental (exact match required)
• Package Type: 4-SMD, No Lead (exact match required)
• Operating Temperature Range: -10°C ~ 60°C (minimum coverage required)

The ABC2-6.144MHZ-4-T from Abracon LLC meets all substitution criteria. Both parts share identical frequency, tolerance, load capacitance, operating mode, and package specifications. Physical dimensions vary slightly within acceptable manufacturing tolerances for the 4-SMD form factor.

Parameter Comparison

Engineering Selection Recommendations

The ABC2-6.144MHZ-4-T serves as a direct functional equivalent to the obsolete CS20-6.144MABJ-UT. Both components share identical electrical specifications for frequency, tolerance, load capacitance, and operating mode. The Abracon part is currently in active production status, ensuring long-term availability for new designs and production continuity.

The ABC2-6.144MHZ-4-T exhibits lower ESR (60 Ohms versus 100 Ohms), which represents an improvement in circuit performance characteristics. Physical dimensions are compatible within standard PCB layout tolerances for 4-SMD packages. The Abracon part is RoHS3 compliant and REACH affected, reflecting current environmental and regulatory compliance standards.

Selection of the ABC2-6.144MHZ-4-T eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing circuit designs specified for the CS20-6.144MABJ-UT.

Frequently Asked Questions (FAQ)

Q: Can the ABC2-6.144MHZ-4-T directly replace the CS20-6.144MABJ-UT on existing PCBs?

A: Yes. Both parts use identical 4-SMD, No Lead package specifications and share the same footprint. Physical dimension variations (0.008" length difference, 0.008" height difference) fall within standard PCB layout tolerances for this package type.

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

A: The ABC2-6.144MHZ-4-T has lower ESR (60 Ohms) compared to the CS20-6.144MABJ-UT (100 Ohms). Lower ESR generally reduces power consumption and improves frequency stability in oscillator circuits. This represents a performance enhancement rather than a limitation.

Q: Are there compliance differences between these parts?

A: The ABC2-6.144MHZ-4-T is RoHS3 compliant and REACH affected, reflecting current regulatory standards. The CS20-6.144MABJ-UT is REACH unaffected. Both parts carry EAR99 ECCN classification and share identical HTSUS codes. Compliance requirements depend on end-use application and regional regulations.

Q: Why is the CS20-6.144MABJ-UT listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The ABC2-6.144MHZ-4-T from Abracon is actively manufactured and represents the recommended path for design continuity and production planning.

Q: Are frequency tolerance specifications identical?

A: Yes. Both parts specify ±30ppm frequency tolerance. The CS20-6.144MABJ-UT lists ±50ppm frequency stability, while the ABC2-6.144MHZ-4-T specifies ±30ppm stability. Tolerance and stability are distinct parameters; tolerance defines the initial frequency accuracy, while stability defines drift over time and operating conditions.