ECS-49-S-1 Crystal 4.9152 MHz Equivalent & Substitute Parts

Part Overview

The ECS-49-S-1 is a 4.9152 MHz through-hole crystal oscillator in HC-49/U package configuration, designed for fundamental mode operation with 55 Ohms equivalent series resistance. This part carries a "Not For New Designs" status, making identification of active equivalent alternatives essential for ongoing production and maintenance applications. The HC-49/U form factor and specific frequency make direct substitution critical for circuit compatibility.

Substiute Parts

ECS-49-S-1

ECS Inc.In Stock: 1532ECS-49-S-1 Datasheet

Current PartRFQ

ECS-49-S-1X

ECS Inc.In Stock: 1888ECS-49-S-1X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECS-49-S-1 is determined by the following critical parameters:

• Frequency Match: 4.9152 MHz (exact frequency required for circuit resonance)
• Frequency Tolerance: ±30ppm (determines timing accuracy in application)
• ESR: 55 Ohms (affects circuit loading and startup characteristics)
• Package / Case: HC-49/U (mechanical and electrical footprint compatibility)
• Operating Mode: Fundamental (determines harmonic content and circuit behavior)
• Operating Temperature Range: -10°C ~ 70°C (environmental operating limits)

The ECS-49-S-1X qualifies as a parametric equivalent because it maintains identical electrical specifications and mechanical form factor while offering active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The ECS-49-S-1X serves as the direct parametric equivalent for the ECS-49-S-1. All critical electrical and mechanical parameters are identical, ensuring drop-in compatibility in existing circuit designs. The ECS-49-S-1X offers the following advantages:

• Active Product Status: ECS-49-S-1X maintains active manufacturing status, ensuring long-term availability and supply chain continuity.
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status meet current environmental and regulatory requirements.
• Moisture Sensitivity: MSL Level 1 (Unlimited) indicates minimal moisture sensitivity, reducing handling and storage constraints.

For applications requiring the 4.9152 MHz HC-49/U crystal with 55 Ohms ESR and ±30ppm tolerance, the ECS-49-S-1X is the recommended active alternative.

Frequently Asked Questions (FAQ)

Q: Can ECS-49-S-1X be used as a direct replacement for ECS-49-S-1?

A: Yes. The ECS-49-S-1X maintains identical frequency (4.9152 MHz), tolerance (±30ppm), ESR (55 Ohms), package (HC-49/U), and operating temperature range (-10°C ~ 70°C). No circuit modifications are required.

Q: What is the significance of the "Not For New Designs" status on the ECS-49-S-1?

A: This status indicates the part is obsolete for new product development. The ECS-49-S-1X, with active status, is the recommended choice for both new designs and replacement applications.

Q: Are there any packaging differences between these parts?

A: The ECS-49-S-1 and ECS-49-S-1X both use HC-49/U through-hole packaging with identical dimensions (0.447" L x 0.183" W). The ECS-49-S-1X is supplied in Bulk packaging, while the ECS-49-S-1 packaging type is not specified.

Q: What does MSL Level 1 mean for the ECS-49-S-1X?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control requirements. This simplifies storage and handling compared to higher MSL ratings.

Q: Are both parts RoHS compliant?

A: The ECS-49-S-1X is ROHS3 compliant. RoHS status for the ECS-49-S-1 is not specified in the available documentation.