CS20-20.480MABJ-UT Equivalent & Substitute Parts

Part Overview

The CS20-20.480MABJ-UT is a 20.48 MHz crystal oscillator manufactured by Citizen Finedevice Co Ltd, designed for applications requiring precise frequency generation at fundamental operating mode. This part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations. The crystal operates across a temperature range of -10°C to 60°C with a load capacitance of 18pF and is packaged in a 4-SMD, No Lead surface mount configuration.

Substiute Parts

CS20-20.480MABJ-UT

Citizen Finedevice Co LtdIn Stock: 776CS20-20.480MABJ-UT Datasheet

Current PartRFQ

ABC2-20.480MHZ-4-T

Abracon LLCIn Stock: 833ABC2-20.480MHZ-4-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS20-20.480MABJ-UT is determined by the following critical parameters:

• Frequency: 20.48 MHz (exact match required)
• Frequency Tolerance: ±30ppm (maximum allowable deviation)
• Load Capacitance: 18pF (circuit design dependent)
• Operating Mode: Fundamental (electrical characteristic)
• Package / Case: 4-SMD, No Lead (mechanical compatibility)
• Operating Temperature Range: -10°C to 60°C (minimum requirement)
• Mounting Type: Surface Mount (assembly process compatibility)

The ABC2-20.480MHZ-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 ABC2-20.480MHZ-4-T is a direct functional substitute for the CS20-20.480MABJ-UT. The substitute part carries Active product status, ensuring long-term availability and supply chain continuity. The ABC2-20.480MHZ-4-T demonstrates improved compliance posture with ROHS3 certification, whereas the original part does not specify RoHS compliance. Both parts share identical frequency, load capacitance, operating temperature range, and package configuration.

The lower ESR value (30 Ohms) of the substitute part represents an electrical improvement that enhances circuit performance without introducing compatibility issues. The marginal dimensional differences (0.008" length increase, 0.008" height reduction) remain within typical PCB layout tolerances for 4-SMD packages.

Frequently Asked Questions (FAQ)

Q: Can the ABC2-20.480MHZ-4-T replace the CS20-20.480MABJ-UT in existing designs?

A: Yes. Both parts operate at 20.48 MHz with ±30ppm frequency tolerance, 18pF load capacitance, and identical operating temperature range. The 4-SMD, No Lead package configuration and surface mount mounting type are identical. The substitute part's lower ESR (30 Ohms versus 50 Ohms) improves electrical performance.

Q: What are the dimensional compatibility considerations?

A: The substitute part measures 0.465" L x 0.217" W (11.80mm x 5.50mm) compared to the original 0.457" L x 0.217" W (11.60mm x 5.50mm). The length difference of 0.008" (0.20mm) and height reduction of 0.008" (0.20mm) are within standard PCB layout tolerances for this package class and do not require design modifications.

Q: Why is the original part listed as obsolete?

A: The CS20-20.480MABJ-UT is classified as obsolete by the manufacturer. The ABC2-20.480MHZ-4-T maintains Active product status, ensuring continued availability and manufacturing support.

Q: Are there compliance differences between the two parts?

A: The ABC2-20.480MHZ-4-T carries ROHS3 compliance certification. Both parts share the same ECCN (EAR99) and HTSUS (8541.60.0060) classifications. The substitute part is REACH Affected, while the original is REACH Unaffected.

Q: What is the significance of the ESR difference?

A: The substitute part's ESR of 30 Ohms is lower than the original 50 Ohms. Lower ESR reduces power dissipation and improves frequency stability in oscillator circuits. This represents an electrical enhancement and does not create substitution barriers.