ECS-196.6-20-4 Crystal Equivalent & Substitute Parts

Part Overview

The ECS-196.6-20-4 is a 19.6608 MHz through-hole crystal oscillator in HC-49/US package with 20pF load capacitance and 40 Ohms equivalent series resistance. This part is classified as "Not For New Designs," making identification of active equivalent alternatives essential for ongoing production and maintenance applications. The part operates in fundamental mode across a temperature range of -10°C to 70°C with ±30ppm frequency tolerance.

Substiute Parts

ECS-196.6-20-4

ECS Inc.In Stock: 2397ECS-196.6-20-4 Datasheet

Current PartRFQ

ECS-196.6-20-4DN

ECS Inc.In Stock: 1175ECS-196.6-20-4DN Datasheet

SimilarRFQ

ECS-196.6-20-4X

ECS Inc.In Stock: 1228ECS-196.6-20-4X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-196.6-20-4 is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 19.6608 MHz
• Frequency Tolerance: ±30ppm
• Load Capacitance: 20pF
• ESR: 40 Ohms
• Package / Case: HC-49/US
• Mounting Type: Through Hole
• Operating Mode: Fundamental

Allowable Variation Parameters:

• Frequency Stability: May vary within design specifications
• Operating Temperature Range: May extend beyond original range
• Product Status: Active alternatives preferred over obsolete designations
• RoHS Compliance: May differ from original part
• Series Designation: May vary (HC-49US, HC-49US-DN, HC-49USX)

Two substitute parts meet these criteria: ECS-196.6-20-4X and ECS-196.6-20-4DN. Both maintain identical frequency, tolerance, load capacitance, ESR, and package specifications while differing in frequency stability, temperature range, and compliance status.

Parameter Comparison

Engineering Selection Recommendations

ECS-196.6-20-4X is the preferred substitute for new procurement and design transitions. This part maintains identical electrical specifications (frequency, tolerance, load capacitance, ESR) and operating temperature range as the original ECS-196.6-20-4, while offering Active product status and ROHS3 compliance. The matching frequency stability of ±50ppm ensures equivalent performance in existing circuit designs without modification.

ECS-196.6-20-4DN serves as an alternative substitute with extended operating temperature range (-40°C to 85°C) compared to the original part (-10°C to 70°C). This part is Active and suitable for applications requiring broader temperature operation. The frequency stability specification of ±100ppm is wider than the original ±50ppm; applications sensitive to frequency stability variation must evaluate this parameter against circuit requirements.

Both substitutes are manufactured by ECS Inc. and maintain identical mechanical dimensions and through-hole mounting compatibility with the original ECS-196.6-20-4.

Frequently Asked Questions (FAQ)

Q: Can ECS-196.6-20-4X be used as a direct replacement for ECS-196.6-20-4?

A: Yes. The ECS-196.6-20-4X maintains all critical electrical parameters: 19.6608 MHz frequency, ±30ppm tolerance, 20pF load capacitance, 40 Ohms ESR, and identical HC-49/US package dimensions. Operating temperature range and frequency stability are also matched. No circuit modification is required.

Q: What is the difference between ECS-196.6-20-4X and ECS-196.6-20-4DN?

A: Both parts share identical frequency, tolerance, load capacitance, ESR, and package specifications. ECS-196.6-20-4X operates from -10°C to 70°C with ±50ppm frequency stability and ROHS3 compliance. ECS-196.6-20-4DN operates from -40°C to 85°C with ±100ppm frequency stability and RoHS non-compliance. Selection depends on temperature range requirements and frequency stability tolerance of the application.

Q: Why is the original ECS-196.6-20-4 marked "Not For New Designs"?

A: This designation indicates the part is obsolete or transitioning out of production. Active alternatives ECS-196.6-20-4X and ECS-196.6-20-4DN are available for new designs and ongoing production requirements.

Q: Are the physical dimensions identical across all three parts?

A: Yes. All three parts share identical HC-49/US package dimensions: 0.447" L x 0.183" W (11.35mm x 4.65mm) with maximum seated height of 0.138" (4.60mm). Through-hole mounting compatibility is maintained across all variants.

Q: Does frequency stability affect circuit performance?

A: Frequency stability specification indicates the maximum frequency deviation over the operating temperature range. ECS-196.6-20-4X and ECS-196.6-20-4 both specify ±50ppm stability, while ECS-196.6-20-4DN specifies ±100ppm. Applications with tight frequency tolerance requirements should verify that the selected part's stability specification meets circuit design parameters.