ECS-180-S-4 18 MHz Crystal Equivalent & Substitute Parts

Part Overview

The ECS-180-S-4 is an 18 MHz through-hole crystal oscillator in HC-49/US package configuration, designed for fundamental mode operation across industrial temperature ranges. This part carries a "Not For New Designs" status, making identification of active equivalent components essential for ongoing production support and new design initiatives. The primary substitute maintains identical electrical and mechanical specifications while offering current product lifecycle status and improved compliance certifications.

Substiute Parts

ECS-180-S-4

ECS Inc.In Stock: 1378ECS-180-S-4 Datasheet

Current PartRFQ

ECS-180-S-4X

ECS Inc.In Stock: 2150ECS-180-S-4X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-180-S-4 is determined by strict equivalence across the following critical parameters:

• Frequency: 18 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• ESR: 40 Ohms (exact match required)
• Package / Case: HC-49/US (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -10°C ~ 70°C (exact match required)
• Operating Mode: Fundamental (exact match required)

The ECS-180-S-4X meets all substitution criteria as a parametric equivalent. The substitute differs only in product lifecycle status (Active vs. Not For New Designs) and compliance certifications, with no electrical or mechanical parameter deviations.

Parameter Comparison

Engineering Selection Recommendations

The ECS-180-S-4X is the direct parametric equivalent for the ECS-180-S-4. Selection between these parts should be based on the following factors:

For legacy production support and existing designs currently using ECS-180-S-4, the substitute ECS-180-S-4X provides identical electrical and mechanical performance with no circuit redesign required.

For new design initiatives, ECS-180-S-4X is the appropriate selection due to its Active product status and ROHS3 compliance certification. The original ECS-180-S-4 carries a "Not For New Designs" designation and does not meet current RoHS requirements.

Both parts maintain identical frequency specifications (18 MHz ±30ppm), ESR (40 Ohms), package dimensions (HC-49/US), and operating temperature range (-10°C ~ 70°C), ensuring direct functional interchangeability in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can ECS-180-S-4X be used as a direct replacement for ECS-180-S-4 in existing designs?

A: Yes. The ECS-180-S-4X is a parametric equivalent with identical electrical specifications (18 MHz frequency, ±30ppm tolerance, 40 Ohms ESR), operating mode (Fundamental), and physical package (HC-49/US through-hole). No circuit modifications are required.

Q: What is the difference between ECS-180-S-4 and ECS-180-S-4X?

A: The parts are electrically and mechanically identical. The primary differences are product lifecycle status (ECS-180-S-4X is Active; ECS-180-S-4 is Not For New Designs) and compliance certifications (ECS-180-S-4X is ROHS3 Compliant; ECS-180-S-4 is RoHS non-compliant).

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts share identical dimensions: 0.447" L x 0.183" W (11.35mm x 4.65mm) with a maximum seated height of 0.138" (4.60mm). They are mechanically interchangeable in PCB layouts.

Q: Which part should be specified for new designs?

A: ECS-180-S-4X should be specified for new designs. It carries Active product status and meets current ROHS3 compliance requirements, ensuring long-term supply availability and regulatory alignment.

Q: Do these parts have different moisture sensitivity requirements?

A: No. Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling or storage requirements during manufacturing or assembly.

Q: Are there inventory considerations when selecting between these parts?

A: ECS-180-S-4X has higher current inventory availability (2048 Pcs) compared to ECS-180-S-4 (1321 Pcs), supporting both immediate procurement needs and production planning for new designs.