ECS-98.3-20-7S-TR Crystal Equivalent & Substitute Parts

Part Overview

The ECS-98.3-20-7S-TR is a 9.8304 MHz fundamental mode crystal oscillator in a 4-SOJ surface mount package with 20pF load capacitance and 60 Ohms equivalent series resistance. This component is classified as Not For New Designs, indicating it has reached end-of-life status. Organizations currently using this part in production or maintenance applications require equivalent alternatives that maintain electrical and mechanical compatibility while potentially offering improved compliance or availability.

Substiute Parts

ECS-98.3-20-7S-TR

ECS Inc.In Stock: 5773ECS-98.3-20-7S-TR Datasheet

Current PartRFQ

ECS-98.3-20-7SX-TR

ECS Inc.In Stock: 1689ECS-98.3-20-7SX-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-98.3-20-7S-TR is determined by strict alignment of the following critical parameters:

• Frequency: 9.8304 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• Load Capacitance: 20pF (exact match required)
• Operating Mode: Fundamental (exact match required)
• Package / Case: 4-SOJ, 9.40mm pitch (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -10°C ~ 70°C (exact match required)

The ECS-98.3-20-7SX-TR qualifies as a direct substitute based on these parameters. The ESR difference (60 Ohms vs. 100 Ohms) represents a secondary characteristic variation within acceptable substitution tolerance for this crystal category.

Parameter Comparison

Engineering Selection Recommendations

The ECS-98.3-20-7SX-TR serves as the direct substitute for the ECS-98.3-20-7S-TR. Both components share identical electrical specifications and mechanical compatibility. The primary distinction is RoHS compliance status: the ECS-98.3-20-7SX-TR achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. This compliance improvement makes the substitute part suitable for applications subject to RoHS regulatory requirements. Both parts maintain REACH Unaffected status and identical moisture sensitivity ratings. Selection between these parts should be based on regulatory compliance requirements of the target application and current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the ECS-98.3-20-7SX-TR replace the ECS-98.3-20-7S-TR in existing designs?

A: Yes. Both parts share identical frequency, load capacitance, operating mode, package configuration, and temperature range. The ESR difference (100 Ohms vs. 60 Ohms) and RoHS compliance status do not affect functional substitution in standard crystal oscillator applications.

Q: What is the significance of the ESR difference between these parts?

A: ESR (Equivalent Series Resistance) affects crystal startup characteristics and power consumption in oscillator circuits. The ECS-98.3-20-7SX-TR has higher ESR (100 Ohms) compared to the original (60 Ohms). Circuit design margins should accommodate this variation; however, both values fall within acceptable ranges for fundamental mode crystals in this frequency class.

Q: Are there any package or mounting differences?

A: No. Both parts use identical 4-SOJ packaging with 9.40mm pitch, identical physical dimensions (12.50mm x 4.60mm), and identical maximum seated height (3.70mm). PCB footprints and assembly processes remain unchanged.

Q: Why is the original part marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life status. Existing inventory remains available, but the manufacturer does not recommend this part for new product development. The substitute part carries the same designation, reflecting the product line status.

Q: Does RoHS compliance affect electrical performance?

A: RoHS compliance relates to material composition and environmental regulations, not electrical performance. Both parts meet identical electrical specifications. The ROHS3 compliance of the substitute part addresses regulatory requirements in specific markets and applications.