AX7MBF4-491.5200C Equivalent & Substitute Parts

Part Overview

The AX7MBF4-491.5200C 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 alternatives necessary for ongoing design support and procurement.

Substiute Parts

AX7MBF4-491.5200C

Abracon LLCIn Stock: 871AX7MBF4-491.5200C Datasheet

Current PartRFQ

AX7MCF1-491.5200C

Abracon LLCIn Stock: 838AX7MCF1-491.5200C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AX7MBF4-491.5200C is determined by the following critical parameters:

• Frequency: Must be 491.52 MHz (exact match required)
• Output Type: Must be CML
• Package Type: Must be 8-SMD, No Lead
• Package Dimensions: Must be 7.00mm x 5.00mm footprint
• Function: Must support Enable/Disable
• Frequency Stability: Must be ±25ppm or better
• Operating Temperature Range: Must cover -40°C ~ 85°C
• RoHS Compliance: Must be ROHS3 Compliant

The AX7MCF1-491.5200C qualifies as a substitute based on matching all critical parameters. The primary difference is the supply voltage specification: the substitute operates at 1.8V instead of 2.5V. This voltage difference requires circuit-level evaluation to determine compatibility with the target application.

Parameter Comparison

Engineering Selection Recommendations

Both the AX7MBF4-491.5200C and AX7MCF1-491.5200C are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The AX7MCF1-491.5200C is currently available in inventory (825 Pcs), whereas the main part is discontinued at DiGi Electronics.

Selection between these parts depends on circuit voltage compatibility. The substitute operates at 1.8V, which is lower than the main part's 2.5V specification. Applications designed for 2.5V supply must be evaluated to determine if 1.8V operation is acceptable. Both parts maintain identical frequency stability, temperature range, and package specifications, ensuring mechanical and thermal compatibility in surface mount applications.

Frequently Asked Questions (FAQ)

Q: Can the AX7MCF1-491.5200C directly replace the AX7MBF4-491.5200C?

A: Direct replacement requires verification that the application circuit supports 1.8V operation. Both parts share identical frequency, output type, package, and thermal specifications. The voltage difference is the only parameter that may affect compatibility.

Q: Are the package dimensions identical between these parts?

A: Yes. Both parts use 8-SMD, No Lead packaging with dimensions of 7.00mm x 5.00mm and maximum seated height of 1.90mm. PCB footprints are interchangeable.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the AX7MBF4-491.5200C and AX7MCF1-491.5200C are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH unaffected status.

Q: What is the frequency stability specification for both parts?

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

Q: Are there differences in current consumption between these parts?

A: No. Both parts specify 68mA maximum supply current and 67mA maximum disable current.