ECS-150-S-1 15 MHz Crystal Equivalent & Substitute Parts

Part Overview

The ECS-150-S-1 is a 15 MHz through-hole crystal oscillator in HC-49/U package with 25 Ohms equivalent series resistance (ESR) and ±30ppm frequency tolerance. This part carries a "Not For New Designs" status, making substitute parts necessary for ongoing production and new circuit implementations. The original part remains available with 831 pieces in stock but is no longer recommended for new design work.

Substiute Parts

ECS-150-S-1

ECS Inc.In Stock: 918ECS-150-S-1 Datasheet

Current PartRFQ

ECS-150-S-1X

ECS Inc.In Stock: 1814ECS-150-S-1X Datasheet

Parametric EquivalentRFQ

MP150

CTS-Frequency ControlsIn Stock: 35417MP150 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ECS-150-S-1 is determined by strict equivalence across the following critical parameters:

• Frequency: 15 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• Frequency Stability: ±50ppm (exact match required)
• ESR: 25 Ohms (exact match required)
• Load Capacitance: Series (exact match required)
• Operating Mode: Fundamental (exact match required)
• Package / Case: HC-49/U (exact match required)
• Mounting Type: Through Hole (exact match required)
• MSL Rating: 1 (Unlimited) (exact match required)

Two substitute parts meet these criteria: ECS-150-S-1X (parametric equivalent from ECS Inc.) and MP150 (direct manufacturer equivalent from CTS-Frequency Controls). Both maintain identical electrical specifications and package compatibility with the original part.

Parameter Comparison

Engineering Selection Recommendations

For new designs, ECS-150-S-1X is the primary substitute. It maintains identical electrical and mechanical specifications while offering Active product status and ROHS3 compliance. The part is manufactured by the original supplier (ECS Inc.) and carries higher inventory availability (1766 pieces).

MP150 from CTS-Frequency Controls serves as an alternative substitute with identical electrical performance and ROHS3 compliance. This part offers an extended lower operating temperature limit (-20°C vs. -10°C) and significantly higher inventory (35400 pieces). Physical dimensions differ slightly (0.427" L x 0.150" W vs. 0.447" L x 0.183" W), though both maintain the same HC-49/U package classification and maximum seated height of 0.530".

The original ECS-150-S-1 should not be used in new designs due to its "Not For New Designs" status and RoHS non-compliance. Existing designs currently using ECS-150-S-1 can transition to either substitute without circuit modification, provided PCB layout accommodates the minor dimensional variations in MP150.

Frequently Asked Questions (FAQ)

Q: Can ECS-150-S-1X be used as a direct replacement for ECS-150-S-1?

A: Yes. ECS-150-S-1X maintains identical electrical specifications (15 MHz, ±30ppm tolerance, ±50ppm stability, 25 Ohms ESR) and mechanical compatibility (HC-49/U package, through-hole mounting). The primary difference is product status (Active vs. Not For New Designs) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What are the physical differences between MP150 and the original ECS-150-S-1?

A: MP150 has slightly smaller length and width dimensions (0.427" L x 0.150" W compared to 0.447" L x 0.183" W). Both parts maintain the same HC-49/U package designation and identical maximum seated height (0.530"). PCB footprints designed for the original part should accommodate MP150, though layout verification is necessary.

Q: Does MP150 offer any performance advantages?

A: MP150 extends the lower operating temperature limit to -20°C (compared to -10°C for ECS-150-S-1). All other electrical parameters remain identical. MP150 also provides significantly higher inventory availability (35400 pieces vs. 831 pieces for the original part).

Q: Are both substitutes RoHS compliant?

A: Yes. Both ECS-150-S-1X and MP150 are ROHS3 compliant. The original ECS-150-S-1 is RoHS non-compliant, making substitution necessary for applications requiring RoHS certification.

Q: Which substitute should be selected for new production?

A: ECS-150-S-1X is recommended for new designs as the primary substitute, maintaining exact dimensional compatibility with the original part. MP150 is suitable where extended temperature range or higher inventory availability is beneficial, provided PCB layout accommodates the minor dimensional variations.