CFSC7 622.08 MHz XO Oscillator - Equivalent & Substitute Parts

Part Overview

The CFSC7 is a 622.08 MHz XO (Standard) CMOS oscillator manufactured by Cardinal Components Inc., designed for applications requiring precise frequency generation at 3.3V supply voltage with Enable/Disable functionality. This component features a 6-SMD, No Lead package and operates across the -10°C to 85°C temperature range.

The CFSC7 is classified as Obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this oscillator frequency and electrical interface.

Substiute Parts

CFSC7

Cardinal Components Inc.In Stock: 1156CFSC7 Datasheet

Current PartRFQ

XLL73V622.080000I

Renesas Electronics CorporationIn Stock: 1197XLL73V622.080000I Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution analysis for the CFSC7 is based on the following critical parameters that must align for functional compatibility:

• Frequency Match: 622.08 MHz (exact match required)
• Supply Voltage: 3.3V (exact match required)
• Package Type: 6-SMD, No Lead (exact match required)
• Enable/Disable Function: Required for system control compatibility
• Moisture Sensitivity Level: MSL 1 or better (lower MSL acceptable)

The XLL73V622.080000I from Renesas Electronics Corporation meets the frequency, voltage, package, and functional requirements. However, this part differs in oscillator type (VCXO vs. XO) and output interface (LVDS vs. CMOS), which represent functional variations that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The XLL73V622.080000I represents an available substitute from an active product line with current manufacturing support. Both parts share identical frequency, supply voltage, package form factor, and Enable/Disable functionality, establishing baseline compatibility.

Key considerations for selection:

Output Interface Difference: The CFSC7 provides CMOS output, while the XLL73V622.080000I provides LVDS output. This difference requires verification that the receiving circuit can accept LVDS signal levels and termination requirements.

Oscillator Type Difference: The CFSC7 is a fixed-frequency XO, while the XLL73V622.080000I is a VCXO with voltage-controlled tuning capability (±50ppm APR). If the application does not require frequency tuning, the VCXO can operate as a fixed oscillator by holding the control voltage constant.

Current Consumption: The XLL73V622.080000I draws up to 100mA compared to the CFSC7's 40mA maximum. Power supply and thermal design must accommodate this increased current.

Temperature Range: The XLL73V622.080000I operates from -40°C to 85°C, providing extended low-temperature performance compared to the CFSC7's -10°C to 85°C range.

Regulatory Compliance: The XLL73V622.080000I carries ROHS3 compliance certification, supporting modern supply chain and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can the XLL73V622.080000I directly replace the CFSC7 without circuit modifications?

A: Direct replacement requires circuit compatibility verification. The primary concern is the output interface change from CMOS to LVDS. The receiving circuit must be designed to accept LVDS signal levels and impedance termination. If the original circuit expects CMOS logic levels, signal conditioning or receiver redesign is necessary.

Q: What is the functional difference between XO and VCXO oscillators?

A: The CFSC7 XO provides a fixed output frequency of 622.08 MHz. The XLL73V622.080000I VCXO includes a voltage control input that allows frequency adjustment within ±50ppm. For applications requiring fixed frequency operation, the VCXO can be used by applying a constant control voltage, effectively operating as a fixed oscillator.

Q: Are the physical dimensions compatible for PCB layout?

A: Both parts use 6-SMD, No Lead packages. The XLL73V622.080000I is slightly larger in length (7.50mm vs. 7.00mm) and width (5.20mm vs. 5.00mm) but lower in height (1.40mm vs. 2.00mm). PCB footprint verification is required to confirm placement compatibility.

Q: What is the impact of increased current consumption?

A: The XLL73V622.080000I draws up to 100mA compared to the CFSC7's 40mA. Power supply capacity and decoupling must be verified to support this increased current. Thermal analysis may be necessary if the oscillator is located in a thermally constrained area.

Q: Does the extended temperature range of the XLL73V622.080000I affect system performance?

A: The XLL73V622.080000I operates from -40°C to 85°C versus the CFSC7's -10°C to 85°C. The extended low-temperature capability provides additional operational margin for systems deployed in cold environments. No negative performance impact occurs within the CFSC7's original temperature range.

Q: What certifications and compliance standards apply to these parts?

A: Both parts are REACH Unaffected and classified as EAR99 for export control. The XLL73V622.080000I carries ROHS3 compliance certification, meeting current environmental and hazardous substance restrictions. The CFSC7's compliance status is not specified in available documentation.