C3VFSV7 VCXO Oscillator Equivalent & Substitute Parts

Part Overview

The C3VFSV7 is a 311.04 MHz VCXO (Voltage Controlled Crystal Oscillator) with LVDS output, manufactured by Cardinal Components Inc. This oscillator operates at 3.3V with enable/disable functionality and is packaged in a 6-SMD, no-lead configuration. The product is currently obsolete, with 748 units available in new original stock. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity and procurement planning.

Substiute Parts

C3VFSV7

Cardinal Components Inc.In Stock: 803C3VFSV7 Datasheet

Current PartRFQ

XLP73V311.040000I

Renesas Electronics CorporationIn Stock: 683XLP73V311.040000I Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the C3VFSV7 is evaluated based on the following critical parameters:

• Frequency Match: 311.04 MHz (exact match required)
• VCXO Type: Voltage-controlled oscillator with enable/disable capability
• Supply Voltage: 3.3V operation
• Package Compatibility: 6-SMD, no-lead surface mount configuration
• Output Interface: LVDS or compatible logic family
• Frequency Stability: ±30ppm or better
• Operating Temperature: Coverage of -10°C ~ 85°C minimum

The XLP73V311.040000I from Renesas Electronics Corporation meets these core substitution criteria. While the output type differs (LVPECL vs. LVDS), both are differential signaling standards compatible with 3.3V systems. The Renesas part offers superior frequency stability (±50ppm pull range), extended temperature range (-40°C ~ 85°C), and active product status, making it a viable substitute for new designs and ongoing production.

Parameter Comparison

Engineering Selection Recommendations

The C3VFSV7 is classified as obsolete, necessitating transition planning for ongoing production and new designs. The XLP73V311.040000I serves as the primary substitute based on matching frequency, VCXO architecture, 3.3V operation, and package form factor.

Key advantages of the Renesas substitute:

• Active Product Status: Ensures long-term availability and supply chain stability
• Extended Temperature Range: -40°C ~ 85°C operation provides broader environmental coverage
• Improved Frequency Stability: ±50ppm absolute pull range exceeds the Cardinal part's ±30ppm specification
• Compliance: RoHS3 compliant with REACH unaffected status, meeting modern regulatory requirements
• Compact Height: 1.40mm seated height versus 2.00mm, offering PCB design flexibility

The output interface transition from LVDS to LVPECL requires verification of receiver compatibility in the target application. Both standards operate at 3.3V and provide differential signaling; however, signal levels and termination requirements may differ. Electrical interface validation is necessary before production implementation.

Frequently Asked Questions (FAQ)

Q: Can the XLP73V311.040000I directly replace the C3VFSV7 without circuit modifications?

A: The parts share identical frequency, supply voltage, package, and enable/disable functionality. However, the output interface differs (LVPECL vs. LVDS). Direct replacement requires confirmation that downstream receivers accept LVPECL signaling. Termination and biasing networks may require adjustment.

Q: What is the significance of the frequency stability difference (±30ppm vs. ±50ppm)?

A: The C3VFSV7 specifies ±30ppm frequency stability, while the Renesas part lists ±50ppm as the absolute pull range. These parameters measure different aspects of frequency control. The Renesas specification indicates the maximum frequency adjustment range available through the control voltage, which is broader than the Cardinal part's stability specification. Application requirements determine whether this difference is acceptable.

Q: Are the physical dimensions compatible for PCB layout?

A: Both parts use 6-SMD, no-lead packages. The Renesas part is slightly larger in footprint (7.50mm x 5.20mm vs. 7.00mm x 5.00mm) but lower in height (1.40mm vs. 2.00mm). PCB layout must accommodate the larger footprint; the reduced height may improve clearance in constrained designs.

Q: What compliance certifications apply to both parts?

A: Both the C3VFSV7 and XLP73V311.040000I are REACH unaffected and classified as EAR99 for export control purposes. The Renesas part carries RoHS3 compliance certification, meeting current environmental and hazardous substance restrictions.

Q: Is the higher maximum supply current (120mA vs. 80mA) a concern?

A: The Renesas part specifies 120mA maximum supply current compared to the Cardinal part's 80mA. Power supply design must accommodate this higher current draw. Verify that the 3.3V rail has sufficient capacity and that decoupling networks are appropriately sized for the increased current demand.

Q: What is the moisture sensitivity level, and does it affect handling?

A: Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard surface mount handling procedures apply without special moisture control requirements.