AX7MCF4-491.5200C Equivalent & Substitute Parts

Part Overview

The AX7MCF4-491.5200C 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 1.8V with Enable/Disable functionality and is housed in an 8-SMD, No Lead package measuring 7.00mm x 5.00mm. The part is discontinued at DiGi Electronics, making identification of equivalent alternatives essential for ongoing design support and procurement.

Substiute Parts

AX7MCF4-491.5200C

Abracon LLCIn Stock: 895AX7MCF4-491.5200C Datasheet

Current PartRFQ

AX7MCF1-491.5200C

Abracon LLCIn Stock: 838AX7MCF1-491.5200C Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AX7MCF4-491.5200C is determined by strict equivalence across the following critical parameters:

• Frequency: 491.52 MHz (exact match required)
• Output Type: CML (LVPECL-compatible signaling)
• Supply Voltage: 1.8V (single supply operation)
• Function: Enable/Disable capability
• Frequency Stability: ±25ppm tolerance
• Operating Temperature: -40°C ~ 85°C range
• Package: 8-SMD, No Lead form factor
• Compliance: ROHS3 and REACH status

The AX7MCF1-491.5200C meets all these criteria as a parametric equivalent within the Abracon ClearClock™ AX7 series, differing only in internal design variant (MCF1 vs. MCF4) while maintaining identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The AX7MCF1-491.5200C provides equivalent functionality with identical electrical performance and package specifications. Selection between these variants should be based on inventory availability and procurement lead times, as both are discontinued at DiGi Electronics. The AX7MCF4 variant currently maintains higher stock levels (863 pcs vs. 825 pcs).

Frequently Asked Questions (FAQ)

Q: Can the AX7MCF1-491.5200C directly replace the AX7MCF4-491.5200C?

A: Yes. Both parts are parametric equivalents with identical frequency, output type, supply voltage, temperature range, package dimensions, and compliance certifications. The MCF1 and MCF4 designations indicate internal design variants that do not affect electrical or mechanical compatibility.

Q: Are there any differences in pin configuration or footprint?

A: No. Both parts use the same 8-SMD, No Lead package with identical 7.00mm x 5.00mm x 1.90mm (max) dimensions. PCB footprints and assembly procedures are interchangeable.

Q: What does the ±25ppm frequency stability specification mean for circuit design?

A: The ±25ppm specification defines the maximum frequency deviation across the operating temperature range (-40°C ~ 85°C) and over the component's lifetime. This tolerance must be accounted for in receiver or system-level frequency synchronization requirements.

Q: Is the Enable/Disable function critical for substitution?

A: Yes. The Enable/Disable function is a core feature of both parts and must be present in any substitute. This function allows dynamic power management by reducing supply current when the oscillator output is not required.

Q: What is the significance of MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 indicates the lowest moisture sensitivity level, meaning the component can be stored indefinitely without moisture bake-out procedures prior to reflow soldering. This simplifies inventory management and assembly logistics.