ECS-40-20-5P-TR 4 MHz Crystal Equivalent & Substitute Parts

Part Overview

The ECS-40-20-5P-TR is a 4 MHz surface mount crystal oscillator in HC-49/US package with 20pF load capacitance and 150 Ohms equivalent series resistance. This part is classified as "Not For New Designs," making identification of active equivalent and substitute parts essential for ongoing production and maintenance applications. The crystal operates in fundamental mode across a temperature range of -10°C to 70°C with ±30ppm frequency tolerance and ±50ppm frequency stability.

Substiute Parts

ECS-40-20-5P-TR

ECS Inc.In Stock: 2762ECS-40-20-5P-TR Datasheet

Current PartRFQ

ECS-40-20-5PVX

ECS Inc.In Stock: 7154ECS-40-20-5PVX Datasheet

DirectRFQ

ECS-40-20-5PDN-TR

ECS Inc.In Stock: 2611ECS-40-20-5PDN-TR Datasheet

SimilarRFQ

ECS-40-20-5PX-TR

ECS Inc.In Stock: 5745ECS-40-20-5PX-TR Datasheet

Parametric EquivalentRFQ

LFXTAL078542

IQD Frequency ProductsIn Stock: 951LFXTAL078542 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECS-40-20-5P-TR is determined by strict equivalence across the following critical parameters:

• Frequency: 4 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• Load Capacitance: 20pF (exact match required)
• Package / Case: HC-49/US (exact match required)
• Operating Mode: Fundamental (exact match required)
• Mounting Type: Surface Mount (exact match required)

Substitute parts are grouped into three categories based on their relationship to the main part:

Direct Manufacturer Equivalent (ECS-40-20-5PVX): Identical electrical specifications with improved product status (Active) and enhanced RoHS3 compliance. Reduced height profile (2.60mm vs 4.30mm) from same manufacturer series.

Similar Manufacturer Part (ECS-40-20-5PDN-TR): Maintains core electrical parameters with extended operating temperature range (-40°C to 85°C) and higher frequency stability tolerance (±100ppm). Same manufacturer, same package, same product series classification.

Parametric Equivalent (ECS-40-20-5PX-TR): Identical electrical and mechanical specifications with Active product status and RoHS3 compliance. Different packaging format (Cut Tape & Digi-Reel® vs Tape & Reel).

Similar Manufacturer Part - Alternative Source (LFXTAL078542): Cross-manufacturer substitute from IQD Frequency Products with identical frequency, tolerance, load capacitance, and package. Marginal ESR variance (130 Ohms vs 150 Ohms) within acceptable tolerance band. Active product status with RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement with Improved Compliance: ECS-40-20-5PVX is the primary substitute. It maintains identical electrical specifications while offering Active product status and ROHS3 compliance. The reduced height profile (2.60mm) provides a mechanical advantage in space-constrained applications. This part is recommended for new production runs and ongoing supply continuity.

For Extended Temperature Range Applications: ECS-40-20-5PDN-TR accommodates operating temperatures from -40°C to 85°C, compared to the main part's -10°C to 70°C range. Frequency stability tolerance increases to ±100ppm. This part is suitable only when extended temperature operation is required and the higher stability tolerance is acceptable.

For Alternative Packaging Requirements: ECS-40-20-5PX-TR provides identical electrical and mechanical specifications with Active product status and ROHS3 compliance in Cut Tape and Digi-Reel® packaging format. Select this part when tape format differs from standard Tape & Reel requirements.

For Cross-Manufacturer Sourcing: LFXTAL078542 from IQD Frequency Products offers Active product status and ROHS3 compliance with equivalent electrical performance. ESR specification of 130 Ohms is within acceptable tolerance variance from the 150 Ohms main part specification. This part provides supply chain diversification and is suitable for applications where multi-source qualification is required.

Frequently Asked Questions (FAQ)

Q: Can ECS-40-20-5PVX be used as a direct drop-in replacement for ECS-40-20-5P-TR?

A: Yes. ECS-40-20-5PVX maintains identical frequency (4 MHz), frequency tolerance (±30ppm), load capacitance (20pF), ESR (150 Ohms), operating mode (Fundamental), and HC-49/US package. The reduced height profile (2.60mm vs 4.30mm) is mechanically compatible with standard HC-49/US footprints. Electrical performance is equivalent.

Q: What is the significance of the "Not For New Designs" status on the main part?

A: This designation indicates the ECS-40-20-5P-TR is in mature or end-of-life phase. ECS Inc. recommends transitioning to active alternatives such as ECS-40-20-5PVX or ECS-40-20-5PX-TR for new product development and long-term supply assurance.

Q: Why does ECS-40-20-5PDN-TR have a higher frequency stability tolerance (±100ppm vs ±50ppm)?

A: ECS-40-20-5PDN-TR is specified for extended operating temperature range (-40°C to 85°C). The broader temperature envelope introduces greater frequency drift, reflected in the relaxed stability specification. This part is suitable only when extended temperature operation is required.

Q: Is LFXTAL078542 from IQD Frequency Products electrically equivalent despite the 130 Ohms ESR specification?

A: LFXTAL078542 maintains the critical electrical parameters: 4 MHz frequency, ±30ppm tolerance, 20pF load capacitance, and Fundamental operating mode. The ESR specification of 130 Ohms versus 150 Ohms represents a 13% reduction within acceptable component tolerance bands for crystal oscillators. This part is electrically compatible for standard applications.

Q: What packaging format differences exist between substitute parts?

A: ECS-40-20-5P-TR, ECS-40-20-5PVX, ECS-40-20-5PDN-TR, and LFXTAL078542 are supplied in Tape & Reel (TR) format. ECS-40-20-5PX-TR is supplied in Cut Tape (CT) and Digi-Reel® format. Packaging format does not affect electrical or mechanical compatibility; selection depends on assembly line equipment and inventory management requirements.

Q: Are all substitute parts RoHS3 compliant?

A: ECS-40-20-5PVX, ECS-40-20-5PX-TR, and LFXTAL078542 are ROHS3 compliant. ECS-40-20-5P-TR and ECS-40-20-5PDN-TR are RoHS non-compliant. For applications requiring RoHS compliance, select from the three compliant alternatives.