AX7MBF2-491.5200C Equivalent & Substitute Parts

Part Overview

The AX7MBF2-491.5200C is a 491.52 MHz XO (Standard) CML oscillator manufactured by Abracon LLC, part of the ClearClock™ AX7 series. This surface mount oscillator operates at 2.5V with Enable/Disable functionality and is housed in an 8-SMD, No Lead package. The part is discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing design support and procurement.

Substiute Parts

AX7MBF2-491.5200C

Abracon LLCIn Stock: 918AX7MBF2-491.5200C Datasheet

Current PartRFQ

AX7MCF1-491.5200C

Abracon LLCIn Stock: 838AX7MCF1-491.5200C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AX7MBF2-491.5200C are identified based on the following critical parameters that determine functional compatibility:

• Frequency: 491.52 MHz (exact match required)
• Output Type: CML (exact match required)
• Package / Case: 8-SMD, No Lead (exact match required)
• Physical Dimensions: 0.276" L x 0.197" W, Height 0.075" max (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• Frequency Stability: ±25ppm (exact match required)
• Function: Enable/Disable (exact match required)
• RoHS Status: ROHS3 Compliant (compliance requirement)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

The primary allowable variation is Supply Voltage, which may differ while maintaining electrical and mechanical compatibility within the ClearClock™ AX7 series architecture.

Parameter Comparison

Engineering Selection Recommendations

The AX7MCF1-491.5200C serves as a direct substitute for the discontinued AX7MBF2-491.5200C. Both parts maintain identical electrical performance characteristics, physical dimensions, and regulatory compliance status. The voltage supply difference (1.8V versus 2.5V) represents the only parameter variation and must be evaluated against circuit design requirements.

Selection of the substitute part is supported by:

• Identical frequency, output type, and package specifications
• Matching frequency stability and temperature operating range
• Equivalent current consumption characteristics
• Identical RoHS3 compliance and moisture sensitivity rating
• Same series architecture (ClearClock™ AX7)

Frequently Asked Questions (FAQ)

Q: Can the AX7MCF1-491.5200C replace the AX7MBF2-491.5200C in all applications?

A: The substitute part is mechanically and electrically compatible with identical package dimensions, frequency, output type, and performance specifications. The supply voltage difference (1.8V versus 2.5V) must be verified against circuit design requirements before implementation.

Q: Are the physical dimensions identical between the main part and substitute?

A: Yes. Both parts use the 8-SMD, No Lead package with dimensions of 0.276" L x 0.197" W (7.00mm x 5.00mm) and maximum seated height of 0.075" (1.90mm). PCB layout and footprint compatibility is maintained.

Q: What is the significance of the supply voltage difference?

A: The AX7MBF2-491.5200C operates at 2.5V while the AX7MCF1-491.5200C operates at 1.8V. This difference affects power supply design and must be confirmed compatible with the target circuit before substitution.

Q: Are both parts RoHS compliant?

A: Yes. Both the AX7MBF2-491.5200C and AX7MCF1-491.5200C are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: What is the frequency stability specification for these oscillators?

A: Both parts maintain a frequency stability of ±25ppm across the operating temperature range of -40°C to 85°C.