ECS-73-20-4DN Crystal Equivalent & Substitute Parts

Part Overview

The ECS-73-20-4DN is a 7.3728 MHz through-hole crystal oscillator in HC-49/US package, designed for fundamental mode operation with 20pF load capacitance and 80 Ohms equivalent series resistance. This Active product is suitable for new designs requiring stable frequency reference in industrial and commercial applications. Alternative models become necessary when addressing specific compliance requirements, temperature range constraints, or design phase transitions.

Substiute Parts

ECS-73-20-4DN

ECS Inc.In Stock: 1183ECS-73-20-4DN Datasheet

Current PartRFQ

ECS-73-20-4

ECS Inc.In Stock: 1081ECS-73-20-4 Datasheet

SimilarRFQ

ECS-73-20-4XDN

ECS Inc.In Stock: 4290ECS-73-20-4XDN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-73-20-4DN is determined by strict equivalence across the following critical parameters:

• Frequency: 7.3728 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• Load Capacitance: 20pF (exact match required)
• ESR: 80 Ohms (exact match required)
• Operating Mode: Fundamental (exact match required)
• Package / Case: HC-49/US (exact match required)
• Mounting Type: Through Hole (exact match required)

Two substitute parts meet these criteria: ECS-73-20-4XDN and ECS-73-20-4. Variations in frequency stability, operating temperature range, product status, and RoHS compliance do not disqualify substitution but indicate application-specific suitability.

Parameter Comparison

Engineering Selection Recommendations

ECS-73-20-4XDN is the preferred substitute for new designs. It maintains identical electrical and mechanical specifications to the main part while offering ROHS3 compliance, addressing regulatory requirements for restricted substances. Both the main part and this substitute operate across the full -40°C ~ 85°C temperature range with ±100ppm frequency stability.

ECS-73-20-4 is a legacy equivalent suitable only for existing production or maintenance applications. Its "Not For New Designs" status and narrower operating temperature range (-10°C ~ 70°C) restrict its use to systems already qualified with this component. The ±50ppm frequency stability meets the ±30ppm tolerance requirement but provides less margin than the other options.

Frequently Asked Questions (FAQ)

Q: Can ECS-73-20-4XDN replace ECS-73-20-4DN in new designs? A: Yes. ECS-73-20-4XDN is electrically and mechanically equivalent with identical frequency, load capacitance, ESR, and package specifications. It is the recommended choice for new designs due to Active product status and ROHS3 compliance.

Q: What is the difference between ECS-73-20-4DN and ECS-73-20-4? A: Both share identical electrical parameters (7.3728 MHz, ±30ppm tolerance, 20pF load capacitance, 80 Ohms ESR). ECS-73-20-4DN operates across -40°C ~ 85°C with ±100ppm stability and Active status. ECS-73-20-4 operates across -10°C ~ 70°C with ±50ppm stability and Not For New Designs status. Selection depends on temperature requirements and design phase.

Q: Are all three parts pin-compatible? A: Yes. All three parts use HC-49/US package with through-hole mounting, ensuring mechanical and electrical compatibility in PCB designs.

Q: Does RoHS compliance affect electrical performance? A: No. ROHS3 compliance in ECS-73-20-4XDN addresses material composition only and does not alter frequency, tolerance, load capacitance, or ESR specifications.

Q: Which substitute should I use if my application requires -40°C operation? A: ECS-73-20-4XDN is the only substitute supporting the full -40°C ~ 85°C range. ECS-73-20-4 operates only to -10°C minimum and is unsuitable for extended low-temperature applications.