CS20-4.9152MABJ-UT Equivalent & Substitute Parts

Part Overview

The CS20-4.9152MABJ-UT is a 4.9152 MHz crystal oscillator manufactured by Citizen Finedevice Co Ltd, designed for fundamental mode operation in surface mount applications. This part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing production support, design updates, and inventory management. The crystal operates at 4.9152 MHz with ±30ppm frequency tolerance and 18pF load capacitance, housed in a 4-SMD, No Lead package measuring 11.60mm x 5.50mm.

Substiute Parts

CS20-4.9152MABJ-UT

Citizen Finedevice Co LtdIn Stock: 989CS20-4.9152MABJ-UT Datasheet

Current PartRFQ

ABC2-4.9152MHZ-4-T

Abracon LLCIn Stock: 1484ABC2-4.9152MHZ-4-T Datasheet

SimilarRFQ

ECS-49-20-18-TR

ECS Inc.In Stock: 2306ECS-49-20-18-TR Datasheet

SimilarRFQ

ECS-49-20-19A-TR

ECS Inc.In Stock: 2898ECS-49-20-19A-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS20-4.9152MABJ-UT is determined by strict alignment of the following critical parameters:

• Frequency: Must be 4.9152 MHz (exact match required)
• Frequency Tolerance: Must be ±30ppm or tighter
• Load Capacitance: Must be 18pF or compatible within circuit design constraints
• ESR: Must be 150 Ohms or lower to maintain circuit performance
• Operating Mode: Must be Fundamental
• Mounting Type: Must be Surface Mount
• Package Configuration: Must accommodate 4-SMD or 2-SMD, No Lead formats

The three substitute parts identified meet the core frequency and tolerance requirements. However, variations in load capacitance, ESR, package configuration, and operating temperature range create distinct substitution scenarios that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

ABC2-4.9152MHZ-4-T (Abracon LLC)

This substitute provides the closest electrical match to the original part. It maintains identical frequency, tolerance, load capacitance, and operating temperature range. The ESR is lower at 80 Ohms, which improves circuit performance and reduces power consumption. The 4-SMD, No Lead package is mechanically compatible with the original design. The part is currently in active production status with 1436 units in stock. ROHS3 compliance is confirmed. The dimensional variation (11.80mm vs 11.60mm length) is within typical PCB layout tolerances for surface mount components.

ECS-49-20-18-TR (ECS Inc.)

This substitute maintains the 150 Ohm ESR specification and 4-SMD, No Lead package format. However, the load capacitance is specified at 20pF instead of 18pF, requiring circuit verification to confirm compatibility. The operating temperature range extends to -40°C to 85°C, providing broader environmental coverage than the original part. Frequency stability is ±100ppm, which is wider than the original ±50ppm specification. The part is in active production with 2293 units in stock and carries ROHS3 compliance.

ECS-49-20-19A-TR (ECS Inc.)

This substitute uses a 2-SMD, No Lead package configuration instead of the original 4-SMD format. This package difference requires PCB footprint redesign and is not a direct mechanical substitute. The load capacitance is 20pF, requiring circuit validation. The operating temperature range is -10°C to 70°C, providing extended upper temperature coverage. The part is in active production with 2824 units in stock and carries ROHS3 compliance. Selection of this part necessitates design modification.

Frequently Asked Questions (FAQ)

Q: Can ABC2-4.9152MHZ-4-T be used as a direct replacement for CS20-4.9152MABJ-UT?

A: Yes, ABC2-4.9152MHZ-4-T is the most suitable direct substitute. It matches the critical electrical parameters (frequency, tolerance, load capacitance, ESR) and maintains the same 4-SMD, No Lead package configuration. The lower ESR (80 Ohms vs 150 Ohms) is beneficial for circuit performance. Dimensional variations are within standard PCB layout tolerances.

Q: What is the impact of the 20pF load capacitance in ECS-49-20-18-TR and ECS-49-20-19A-TR compared to the original 18pF specification?

A: Load capacitance affects the crystal's operating frequency in the circuit. A 20pF specification requires verification against the circuit's total load capacitance to ensure the final frequency remains within acceptable tolerance. Circuit simulation or empirical testing may be necessary to confirm compatibility.

Q: Why is ECS-49-20-19A-TR listed as a substitute if it uses a 2-SMD package instead of 4-SMD?

A: ECS-49-20-19A-TR meets the electrical frequency and tolerance requirements but requires PCB footprint redesign due to the 2-SMD package configuration. It is listed as a substitute for applications where design modification is feasible and the extended operating temperature range (-10°C to 70°C) provides additional value.

Q: What does the lower ESR of ABC2-4.9152MHZ-4-T (80 Ohms) mean for circuit performance?

A: Lower ESR reduces power dissipation in the crystal and improves circuit startup characteristics. This is generally beneficial and does not create compatibility issues with circuits designed for 150 Ohm ESR crystals.

Q: Are all substitute parts RoHS and REACH compliant?

A: ABC2-4.9152MHZ-4-T, ECS-49-20-18-TR, and ECS-49-20-19A-TR are all ROHS3 compliant. For REACH compliance, ABC2-4.9152MHZ-4-T is REACH Affected, while ECS-49-20-18-TR and ECS-49-20-19A-TR are REACH Unaffected. The original CS20-4.9152MABJ-UT is REACH Unaffected.

Q: What is the significance of the operating temperature range differences?

A: The original part operates from -10°C to 60°C. ECS-49-20-18-TR extends this to -40°C to 85°C, providing broader environmental coverage. ECS-49-20-19A-TR extends to -10°C to 70°C. Selection depends on the application's thermal requirements.