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ECS-41-16-7S-TR Crystal Equivalent & Substitute Parts
Part Overview
The ECS-41-16-7S-TR is a 4.096 MHz surface mount crystal oscillator with 16pF load capacitance, designed for fundamental mode operation in compact 4-SOJ packaging. This part is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. Finding equivalent substitute parts is necessary for ongoing production support, maintenance applications, and legacy system repairs where this specific frequency and load capacitance are required.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Frequency | 4.096 MHz |
| Frequency Tolerance | ±30ppm |
| Load Capacitance | 16pF |
| ESR (Equivalent Series Resistance) | 150 Ohms |
| Operating Mode | Fundamental |
| Operating Temperature Range | -10°C ~ 70°C |
| Mounting Type | Surface Mount |
| Package / Case | 4-SOJ, 9.40mm pitch |
| Physical Dimensions | 12.50mm L x 4.60mm W x 3.70mm H (max) |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the ECS-41-16-7S-TR is determined by the following critical parameters:
- Frequency Match: 4.096 MHz (exact)
- Frequency Tolerance: ±30ppm (exact)
- Operating Mode: Fundamental (exact)
- Package / Case: 4-SOJ, 9.40mm pitch (exact)
- Physical Dimensions: 12.50mm x 4.60mm x 3.70mm max (exact)
- ESR: 150 Ohms (exact)
- Operating Temperature Range: -10°C ~ 70°C (exact)
- Moisture Sensitivity Level: 1 (Unlimited) (exact)
The ECS-41-18-7SX-TR qualifies as a substitute based on matching all critical electrical and mechanical parameters. The primary difference is the load capacitance specification (18pF versus 16pF), which represents a variation within the allowed substitution criteria for this product category. Both parts maintain identical frequency, tolerance, ESR, package geometry, and operating conditions.
Parameter Comparison
| Parameter | ECS-41-16-7S-TR (Main Part) | ECS-41-18-7SX-TR (Substitute) |
|---|---|---|
| Manufacturer | ECS Inc. | ECS Inc. |
| Frequency | 4.096 MHz | 4.096 MHz |
| Frequency Stability | ±50ppm | ±50ppm |
| Frequency Tolerance | ±30ppm | ±30ppm |
| Load Capacitance | 16pF | 18pF |
| ESR | 150 Ohms | 150 Ohms |
| Operating Mode | Fundamental | Fundamental |
| Operating Temperature | -10°C ~ 70°C | -10°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 4-SOJ, 9.40mm pitch | 4-SOJ, 9.40mm pitch |
| Physical Dimensions | 12.50mm L x 4.60mm W x 3.70mm H (max) | 12.50mm L x 4.60mm W x 3.70mm H (max) |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Not For New Designs | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
Engineering Selection Recommendations
The ECS-41-18-7SX-TR is the designated substitute for the ECS-41-16-7S-TR. Selection between these parts should be based on the following criteria:
Use ECS-41-16-7S-TR when legacy system compatibility requires the exact original part specification and RoHS compliance is not a requirement.
Use ECS-41-18-7SX-TR when:
- The application permits the 18pF load capacitance specification
- RoHS3 compliance is required for the end product
- The part is designated as Active status, ensuring ongoing manufacturer support and availability
- New production runs or system revisions are planned
The ECS-41-18-7SX-TR offers improved compliance status (ROHS3 Compliant versus RoHS non-compliant) and active product status, making it the preferred choice for applications where regulatory requirements or long-term supply chain stability are considerations.
Frequently Asked Questions (FAQ)
Q: Can the ECS-41-18-7SX-TR directly replace the ECS-41-16-7S-TR in existing designs?
A: The ECS-41-18-7SX-TR matches all critical electrical and mechanical parameters of the ECS-41-16-7S-TR, including frequency, tolerance, ESR, package geometry, and operating temperature range. The load capacitance difference (18pF versus 16pF) is within the allowed substitution criteria for this product category.
Q: What is the significance of the load capacitance difference between 16pF and 18pF?
A: Load capacitance is a specified parameter that affects crystal oscillator circuit design. Both values are standard specifications within the ECS crystal product line and represent different design points for the same frequency. The difference is accommodated within the frequency tolerance specification of ±30ppm.
Q: Why is the ECS-41-16-7S-TR marked as Not For New Designs?
A: This designation indicates the part has been superseded in the manufacturer's active product portfolio. The ECS-41-18-7SX-TR represents the current active equivalent, offering improved compliance and ongoing manufacturer support.
Q: Are there any physical or mounting differences between these parts?
A: No. Both parts use identical 4-SOJ packaging with 9.40mm pitch and share the same physical dimensions (12.50mm x 4.60mm x 3.70mm max height). They are mechanically interchangeable in surface mount applications.
Q: What is the difference in RoHS compliance between these parts?
A: The ECS-41-16-7S-TR is RoHS non-compliant, while the ECS-41-18-7SX-TR is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the ECS-41-18-7SX-TR is the appropriate selection.
Q: Are both parts available in Tape & Reel packaging?
A: Yes. Both the ECS-41-16-7S-TR and ECS-41-18-7SX-TR are supplied in Tape & Reel (TR) packaging suitable for automated assembly processes.
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