CS10-40.000MAMJ-UT Crystal Oscillator Equivalent & Substitute Parts

Part Overview

The CS10-40.000MAMJ-UT is a 40 MHz surface mount crystal oscillator manufactured by Citizen Finedevice Co Ltd. This component operates at a fundamental frequency with an 18pF load capacitance and 50 Ohms equivalent series resistance in a compact 2-SMD, No Lead package measuring 6.00mm x 4.60mm.

The CS10-40.000MAMJ-UT is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for applications utilizing this frequency standard.

Substiute Parts

CS10-40.000MAMJ-UT

Citizen Finedevice Co LtdIn Stock: 807CS10-40.000MAMJ-UT Datasheet

Current PartRFQ

ABM7-40.000MHZ-D2Y-F-T

Abracon LLCIn Stock: 1529ABM7-40.000MHZ-D2Y-F-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS10-40.000MAMJ-UT is determined by strict equivalence across the following electrical and mechanical parameters:

• Frequency: 40 MHz (exact match required)
• Load Capacitance: 18pF (exact match required)
• ESR: 50 Ohms (exact match required)
• Operating Mode: Fundamental (exact match required)
• Package / Case: 2-SMD, No Lead (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Frequency Tolerance: ±30ppm or tighter (equal or better stability)
• MSL Rating: 1 or equivalent (equal or better moisture resistance)

The ABM7-40.000MHZ-D2Y-F-T meets all substitution criteria. This part maintains identical electrical specifications for frequency, load capacitance, ESR, and operating mode. The physical package dimensions and mounting type are equivalent. The substitute part offers improved frequency stability (±20ppm vs. ±30ppm) and an extended operating temperature range (-40°C to 85°C vs. -10°C to 60°C).

Parameter Comparison

Engineering Selection Recommendations

The ABM7-40.000MHZ-D2Y-F-T is a direct functional substitute for the obsolete CS10-40.000MAMJ-UT. Both parts share identical electrical specifications and physical package dimensions, ensuring mechanical and electrical compatibility in existing designs.

The substitute part offers advantages in product lifecycle status (Active vs. Obsolete), providing improved long-term supply chain availability. The ABM7 series demonstrates superior frequency stability (±30ppm vs. ±60ppm) and an extended operating temperature range (-40°C to 85°C vs. -10°C to 60°C), supporting broader application environments.

The ABM7-40.000MHZ-D2Y-F-T is ROHS3 compliant, meeting current regulatory requirements. The maximum seated height increases from 1.00mm to 1.40mm; verification of PCB clearance is necessary for designs with height constraints.

Frequently Asked Questions (FAQ)

Q: Can the ABM7-40.000MHZ-D2Y-F-T replace the CS10-40.000MAMJ-UT in existing designs without modification?

A: Yes. Both parts operate at 40 MHz with 18pF load capacitance and 50 Ohms ESR in identical 2-SMD, No Lead packages with matching footprints. No circuit modifications are required. Verify PCB clearance for the increased maximum height (1.40mm vs. 1.00mm).

Q: What is the difference in frequency stability between these parts?

A: The CS10-40.000MAMJ-UT specifies ±60ppm frequency stability, while the ABM7-40.000MHZ-D2Y-F-T specifies ±30ppm. The substitute part provides twice the stability margin, beneficial for timing-sensitive applications.

Q: Are there compliance differences between the main part and substitute?

A: The ABM7-40.000MHZ-D2Y-F-T is ROHS3 compliant and REACH Affected. The CS10-40.000MAMJ-UT is REACH Unaffected. Compliance requirements depend on end-use application and regional regulations.

Q: What is the impact of the height difference?

A: The substitute part has a maximum seated height of 1.40mm compared to 1.00mm for the original part. This 0.40mm increase requires verification of available PCB clearance in the component mounting area.

Q: Is the ABM7-40.000MHZ-D2Y-F-T available in the same packaging format?

A: The substitute is available in Tape & Reel (TR) and Cut Tape (CT) packaging formats. Confirm packaging requirements for your procurement and assembly processes.