ECS-184-S-1 18.432 MHz Crystal Equivalent & Substitute Parts

Part Overview

The ECS-184-S-1 is an 18.432 MHz through-hole crystal oscillator in HC-49/U package, designed for fundamental mode operation across industrial temperature ranges. This part carries a "Not For New Designs" status, indicating it has been superseded in the manufacturer's product line. Finding equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and access components with current compliance certifications and active production status.

Substiute Parts

ECS-184-S-1

ECS Inc.In Stock: 1265ECS-184-S-1 Datasheet

Current PartRFQ

ECS-184-S-1X

ECS Inc.In Stock: 811ECS-184-S-1X Datasheet

Parametric EquivalentRFQ

MP184

CTS-Frequency ControlsIn Stock: 1020MP184 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-184-S-1 is determined by the following critical parameters:

• Frequency: Must be 18.432 MHz (exact match required)
• Frequency Tolerance: Must be ±30 ppm or tighter
• Frequency Stability: Must be ±50 ppm or better
• Operating Mode: Must be Fundamental
• Package / Case: Must be HC-49/U
• Load Capacitance: Must be Series
• Mounting Type: Must be Through Hole

ESR and operating temperature range may vary within acceptable engineering tolerances for most applications. Parts meeting all critical parameters are classified as direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

ECS-184-S-1X is the primary parametric equivalent. It matches all critical electrical parameters and maintains identical ESR and operating temperature specifications. The ECS-184-S-1X carries Active product status and ROHS3 compliance, making it suitable for new designs and applications requiring current regulatory compliance.

MP184 is a direct functional substitute from CTS-Frequency Controls. It meets all critical frequency and tolerance specifications. The ESR is 25 Ohms (versus 20 Ohms in the primary part), and the operating temperature range extends to -20°C, providing broader environmental coverage. MP184 is also Active and ROHS3 compliant. The dimensional variation (0.427" L x 0.150" W versus 0.447" L x 0.183" W) must be verified for PCB layout compatibility, though both parts use the same HC-49/U package standard.

Selection between ECS-184-S-1X and MP184 depends on ESR requirements, physical footprint constraints, and supplier availability. Both parts are suitable for direct replacement in applications where the original ECS-184-S-1 was specified.

Frequently Asked Questions (FAQ)

Q: Can ECS-184-S-1X be used as a direct drop-in replacement for ECS-184-S-1?

A: Yes. ECS-184-S-1X matches all critical electrical parameters: 18.432 MHz frequency, ±30 ppm tolerance, ±50 ppm stability, 20 Ohms ESR, and HC-49/U package. The primary difference is product status (Active versus Not For New Designs) and RoHS compliance (ROHS3 versus non-compliant).

Q: What is the significance of the ESR difference between ECS-184-S-1 and MP184?

A: MP184 has 25 Ohms ESR compared to 20 Ohms in the original part. This 5 Ohm difference affects circuit loading and power consumption characteristics. Verify that your circuit design can tolerate this variation before substitution.

Q: Are there physical compatibility concerns with MP184?

A: Both parts use HC-49/U package, but dimensional specifications differ slightly (0.427" L x 0.150" W for MP184 versus 0.447" L x 0.183" W for ECS-184-S-1). Confirm PCB footprint and mounting hole spacing accommodate the MP184 dimensions.

Q: Why is ECS-184-S-1 marked "Not For New Designs"?

A: This designation indicates the part has been superseded in the manufacturer's active product line. ECS-184-S-1X is the recommended replacement for new designs, offering identical electrical performance with current compliance certifications.

Q: Can both substitute parts be used interchangeably in the same application?

A: Both ECS-184-S-1X and MP184 meet the critical frequency and tolerance specifications. However, differences in ESR (20 versus 25 Ohms) and physical dimensions require circuit validation and PCB layout verification before treating them as fully interchangeable.