CS10-24.576MABJ-UT Equivalent & Substitute Parts

Part Overview

The CS10-24.576MABJ-UT is a 24.576 MHz crystal oscillator manufactured by Citizen Finedevice Co Ltd, designed for applications requiring precise frequency generation at this standard telecommunications frequency. This component features an 18pF load capacitance, 50 Ohms ESR, and operates across a -10°C to 60°C temperature range in a compact 2-SMD surface mount package.

The product is currently classified as obsolete, making identification of equivalent substitute parts essential for ongoing system support, design updates, and procurement continuity. Substitute parts must maintain electrical compatibility while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value
Frequency	24.576 MHz
Frequency Tolerance	±30ppm
Load Capacitance	18pF
ESR (Equivalent Series Resistance)	50 Ohms
Operating Mode	Fundamental
Package / Case	2-SMD, No Lead
Size / Dimension	0.236" L x 0.138" W (6.00mm x 4.60mm)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the CS10-24.576MABJ-UT is determined by the following critical parameters:

Frequency Match: 24.576 MHz (exact)
Load Capacitance: 18pF (exact)
Package Type: 2-SMD, No Lead (exact)
Physical Dimensions: 6.00mm x 4.60mm footprint (exact)
Operating Mode: Fundamental (exact)
ESR Compatibility: 50 Ohms or lower (allows for improved performance)
Frequency Tolerance: ±30ppm or tighter (maintains or improves accuracy)

The two identified substitute parts meet these core electrical and mechanical requirements, enabling direct replacement in circuit designs originally specified for the CS10-24.576MABJ-UT.

Parameter Comparison

Parameter	CS10-24.576MABJ-UT (Main)	ABM7-24.576MHZ-D2Y-T	ECS-245.7-18-23A-EN-TR
Manufacturer	Citizen Finedevice Co Ltd	Abracon LLC	ECS Inc.
Frequency	24.576 MHz	24.576 MHz	24.576 MHz
Frequency Tolerance	±30ppm	±20ppm	±30ppm
Frequency Stability	±50ppm	±30ppm	±50ppm
Load Capacitance	18pF	18pF	18pF
ESR	50 Ohms	50 Ohms	30 Ohms
Operating Temperature Range	-10°C ~ 60°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	2-SMD, No Lead	2-SMD, No Lead	2-SMD, No Lead
Size / Dimension	6.00mm x 4.60mm	6.00mm x 4.60mm	6.00mm x 4.60mm
Height - Seated (Max)	1.00mm	1.40mm	1.10mm
Product Status	Obsolete	Active	Active
Packaging	-	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Affected	REACH Unaffected

Engineering Selection Recommendations

ABM7-24.576MHZ-D2Y-T (Abracon LLC): This substitute offers improved frequency stability (±30ppm vs. ±50ppm) and tighter frequency tolerance (±20ppm vs. ±30ppm), resulting in enhanced accuracy. The extended operating temperature range (-40°C to 85°C) provides broader environmental coverage compared to the original part. The component is ROHS3 compliant and actively manufactured, ensuring long-term availability. Height is 1.40mm, which is 0.40mm taller than the original; verify clearance in space-constrained applications.

ECS-245.7-18-23A-EN-TR (ECS Inc.): This substitute maintains identical frequency tolerance (±30ppm) and frequency stability (±50ppm) specifications as the original part, providing direct electrical equivalence. The ESR is reduced to 30 Ohms, offering improved performance characteristics. Extended operating temperature range (-40°C to 85°C) and ROHS3 compliance are provided. Height is 1.10mm, only 0.10mm taller than the original, minimizing potential PCB layout conflicts. REACH status matches the original part (REACH Unaffected).

Both substitutes are actively produced and available in standard Tape & Reel packaging, supporting volume procurement and automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the ABM7-24.576MHZ-D2Y-T be used as a direct replacement for the CS10-24.576MABJ-UT?

A: Yes. Both components share identical frequency (24.576 MHz), load capacitance (18pF), package type (2-SMD, No Lead), and physical footprint (6.00mm x 4.60mm). The ABM7 variant offers improved frequency stability and tolerance specifications. Verify that the increased height (1.40mm vs. 1.00mm) does not conflict with PCB assembly constraints.

Q: What is the difference in ESR between the substitute parts?

A: The CS10-24.576MABJ-UT and ABM7-24.576MHZ-D2Y-T both specify 50 Ohms ESR. The ECS-245.7-18-23A-EN-TR specifies 30 Ohms ESR, which is lower and represents improved performance. Lower ESR reduces power consumption and improves frequency stability in the oscillator circuit.

Q: Are both substitute parts RoHS compliant?

A: Both ABM7-24.576MHZ-D2Y-T and ECS-245.7-18-23A-EN-TR are ROHS3 compliant. The original CS10-24.576MABJ-UT RoHS status is not specified in the available data.

Q: Which substitute part has the smallest height?

A: The ECS-245.7-18-23A-EN-TR has a maximum seated height of 1.10mm, compared to 1.40mm for the ABM7-24.576MHZ-D2Y-T. Both are taller than the original part (1.00mm). For space-critical applications, the ECS part is the preferred choice.

Q: What is the operating temperature range difference?

A: The original CS10-24.576MABJ-UT operates from -10°C to 60°C. Both substitute parts extend this range to -40°C to 85°C, providing enhanced performance in extreme temperature environments.

Q: Are these parts available in standard packaging?

A: Yes. Both ABM7-24.576MHZ-D2Y-T and ECS-245.7-18-23A-EN-TR are supplied in Tape & Reel (TR) packaging, supporting automated pick-and-place assembly and volume production.

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