FPXLF160 Equivalent & Substitute Parts

Part Overview

The FPXLF160 is a 16 MHz crystal oscillator manufactured by Fox Electronics, designed for surface mount applications in a 4-SMD, No Lead package. This part is classified as Obsolete, making it necessary to identify functionally equivalent alternatives for ongoing production and maintenance applications. The FPXLF160 operates at fundamental mode with ±50ppm frequency stability across an operating temperature range of -10°C to 70°C, with an ESR of 40 Ohms and series load capacitance configuration.

Substiute Parts

FPXLF160

Fox ElectronicsIn Stock: 687FPXLF160 Datasheet

Current PartRFQ

ECS-160-S-7SX-TR

ECS Inc.In Stock: 1792ECS-160-S-7SX-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FPXLF160 is determined by the following critical parameters:

• Frequency Match: 16 MHz (exact match required)
• Frequency Stability: ±50ppm or better (tighter tolerance acceptable)
• Operating Temperature Range: -10°C to 70°C minimum coverage
• Operating Mode: Fundamental mode
• Load Capacitance Configuration: Series
• Mounting Type: Surface Mount
• Physical Dimensions: Compatible footprint within 12.50mm x 4.60mm envelope
• MSL Rating: 1 (Unlimited) or equivalent

The ECS-160-S-7SX-TR meets these substitution criteria with matching frequency, operating temperature range, fundamental mode operation, and series load capacitance. While the ESR differs (50 Ohms vs. 40 Ohms) and the package designation varies (4-SOJ vs. 4-SMD), the physical dimensions and electrical performance remain compatible for direct substitution in applications designed for the FPXLF160.

Parameter Comparison

Engineering Selection Recommendations

The ECS-160-S-7SX-TR serves as a direct functional substitute for the obsolete FPXLF160. Both parts share identical frequency, operating temperature range, load capacitance configuration, and physical dimensions. The ECS part offers improved frequency tolerance (±30ppm vs. ±50ppm), which provides tighter performance specifications for applications requiring enhanced stability.

The primary consideration is ESR variance: the ECS-160-S-7SX-TR operates at 50 Ohms compared to the FPXLF160's 40 Ohms. This 10-Ohm difference is within acceptable tolerance for most crystal oscillator circuit designs and does not preclude substitution in standard applications.

The ECS-160-S-7SX-TR carries a "Not For New Designs" status, indicating it remains available for legacy system support and maintenance but is not recommended for new product development. For new designs, consultation with component suppliers for current-generation 16 MHz crystal alternatives is advised.

Frequently Asked Questions (FAQ)

Q: Can the ECS-160-S-7SX-TR directly replace the FPXLF160 on existing PCBs?

A: Yes. Both parts share identical physical dimensions (12.50mm x 4.60mm) and height (3.70mm maximum), enabling direct footprint compatibility. The 4-SMD and 4-SOJ package designations refer to the same physical form factor with compatible lead pitch.

Q: What is the significance of the ESR difference between these parts?

A: The FPXLF160 specifies 40 Ohms ESR while the ECS-160-S-7SX-TR specifies 50 Ohms. This 10-Ohm variance affects circuit startup characteristics and power consumption minimally in standard oscillator circuits. Existing designs for the FPXLF160 accommodate this range without modification.

Q: Does the improved frequency tolerance of the ECS part affect compatibility?

A: No. The ECS-160-S-7SX-TR's ±30ppm tolerance is tighter than the FPXLF160's ±50ppm specification, meaning it meets or exceeds the original part's performance requirements. This represents an improvement for applications sensitive to frequency drift.

Q: Are there compliance or certification differences between these parts?

A: Both parts share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS code (8541.60.0050). The ECS part carries RoHS3 Compliant certification, while the FPXLF160 does not specify RoHS status. For applications requiring RoHS compliance, the ECS-160-S-7SX-TR is the appropriate selection.

Q: What is the MSL rating and why does it matter?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These parts do not require special moisture-controlled storage or handling procedures, simplifying inventory management and reducing component preparation time.