ECS-196.6-20-7S-TR Equivalent & Substitute Parts

Part Overview

The ECS-196.6-20-7S-TR is a 19.6608 MHz fundamental mode crystal oscillator in a 4-SOJ surface mount package with 20pF load capacitance and 40 Ohms equivalent series resistance. This component is classified as Not For New Designs, indicating it has been superseded in the product lifecycle. Identifying equivalent substitute parts is necessary for applications requiring continued support, legacy system maintenance, or when original inventory becomes unavailable.

Substiute Parts

ECS-196.6-20-7S-TR

ECS Inc.In Stock: 1410ECS-196.6-20-7S-TR Datasheet

Current PartRFQ

ECS-196.6-18-7SX-TR

ECS Inc.In Stock: 783ECS-196.6-18-7SX-TR Datasheet

SimilarRFQ

ECS-196.6-20-7SX-TR

ECS Inc.In Stock: 3383ECS-196.6-20-7SX-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECS-196.6-20-7S-TR is determined by the following critical parameters:

• Frequency Match: All substitute parts must operate at 19.6608 MHz
• Frequency Tolerance: All parts maintain ±30ppm tolerance
• Package Compatibility: All parts use 4-SOJ, 9.40mm pitch surface mount package
• Operating Temperature Range: All parts support -10°C ~ 70°C operation
• Load Capacitance Tolerance: Substitutes may vary between 18pF and 20pF, as both values are within acceptable circuit design margins for this frequency class
• ESR Variation: ESR may range from 40 to 50 Ohms, within acceptable limits for fundamental mode crystal operation

Two substitute parts meet these criteria: ECS-196.6-20-7SX-TR and ECS-196.6-18-7SX-TR, both from ECS Inc. and both belonging to the ECX-3SX series.

Parameter Comparison

Engineering Selection Recommendations

ECS-196.6-20-7SX-TR provides the closest electrical match to the ECS-196.6-20-7S-TR, maintaining identical load capacitance at 20pF. This part is ROHS3 compliant and offers improved environmental compliance compared to the original. ESR increases from 40 to 50 Ohms, which remains within acceptable operating parameters for this frequency class. Product status is Not For New Designs.

ECS-196.6-18-7SX-TR offers an alternative with reduced load capacitance at 18pF and 50 Ohms ESR. This part carries Active product status, indicating ongoing manufacturer support and availability. ROHS3 compliance provides superior environmental and regulatory alignment. The 2pF load capacitance reduction requires circuit validation but is within acceptable tolerance for fundamental mode crystal applications at this frequency.

For applications requiring the highest compliance posture and longest-term availability, ECS-196.6-18-7SX-TR is the preferred selection. For applications requiring exact load capacitance matching, ECS-196.6-20-7SX-TR is the appropriate choice.

Frequently Asked Questions (FAQ)

Q: Can ECS-196.6-18-7SX-TR replace ECS-196.6-20-7S-TR directly?

A: Electrical substitution is valid. The 2pF load capacitance difference (18pF vs 20pF) falls within acceptable design margins for 19.6608 MHz fundamental mode crystals. Circuit validation is required to confirm oscillator startup and frequency stability in the specific application.

Q: What is the significance of the ESR increase from 40 to 50 Ohms?

A: Both values are within acceptable limits for fundamental mode crystal operation at this frequency. The 50 Ohm ESR of the substitute parts may result in slightly higher power consumption in the oscillator circuit, but this difference is negligible in most applications.

Q: Why is ECS-196.6-18-7SX-TR listed as Active while the original is Not For New Designs?

A: Product status reflects the manufacturer's lifecycle classification. Active status indicates the ECS-196.6-18-7SX-TR remains in current production with ongoing support, making it suitable for new designs and long-term availability.

Q: Are all substitute parts mechanically compatible?

A: Yes. All parts use identical 4-SOJ, 9.40mm pitch packaging with matching dimensions (12.50mm x 4.60mm) and maximum seated height (3.70mm). Direct PCB footprint compatibility is confirmed.

Q: What compliance advantages do the substitute parts offer?

A: Both ECS-196.6-20-7SX-TR and ECS-196.6-18-7SX-TR are ROHS3 compliant, compared to the RoHS non-compliant original. This provides improved environmental compliance and regulatory alignment for applications subject to RoHS requirements.