AX7MCF1-156.2500C Equivalent & Substitute Parts

Part Overview

The AX7MCF1-156.2500C is a 156.25 MHz XO (Standard) CML Oscillator manufactured by Abracon LLC as part of the ClearClock™ AX7 series. This surface mount crystal oscillator operates at 1.8V with Enable/Disable functionality and is housed in an 8-SMD, No Lead package. The part is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

AX7MCF1-156.2500C

Abracon LLCIn Stock: 749AX7MCF1-156.2500C Datasheet

Current PartRFQ

591KB156M250DG

Skyworks Solutions Inc.In Stock: 730591KB156M250DG Datasheet

MFR RecommendedRFQ

AX7MCF3-156.2500C

Abracon LLCIn Stock: 1074AX7MCF3-156.2500C Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AX7MCF1-156.2500C is determined by the following critical parameters:

• Frequency Match: 156.25 MHz (exact)
• Output Configuration: CML output
• Supply Voltage: 1.8V
• Functional Capability: Enable/Disable control
• Frequency Stability: ±25ppm
• Operating Temperature Range: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Physical Footprint: 7.00mm x 5.00mm base dimensions

Substitute parts must maintain electrical compatibility across all these parameters. Package variations (8-SMD vs. 6-SMD) are acceptable provided the physical footprint and height remain compatible with the PCB layout and assembly process.

Parameter Comparison

Engineering Selection Recommendations

591KB156M250DG (Skyworks Solutions Inc.) is the manufacturer-recommended substitute. This part maintains all critical electrical parameters including frequency, output type, supply voltage, function, and frequency stability. The 6-SMD package differs from the original 8-SMD configuration but shares the identical 7.00mm x 5.00mm footprint and compatible height (1.80mm vs. 1.90mm). The part is currently active in production, ensuring long-term availability. Maximum supply current is higher at 110mA compared to 68mA in the original part; this must be evaluated against power budget constraints in the application.

AX7MCF3-156.2500C (Abracon LLC) is a parametric equivalent within the same ClearClock™ AX7 series. This part is electrically identical to the main part and maintains the same 8-SMD package configuration. However, it is also discontinued at DiGi Electronics, limiting its suitability as a long-term replacement solution.

For new designs or ongoing production requiring guaranteed availability, the 591KB156M250DG is the preferred selection based on active product status and manufacturer recommendation.

Frequently Asked Questions (FAQ)

Q: Can the 591KB156M250DG replace the AX7MCF1-156.2500C directly on the PCB?

A: Yes, with package consideration. Both parts share the same 7.00mm x 5.00mm footprint and are compatible with the same land pattern. The 591KB156M250DG uses a 6-SMD package versus the original 8-SMD package, but this does not affect PCB placement compatibility. The height difference (1.80mm vs. 1.90mm) is negligible for most applications.

Q: What is the impact of the higher supply current in the 591KB156M250DG?

A: The 591KB156M250DG draws a maximum of 110mA compared to 68mA in the AX7MCF1-156.2500C. This 42mA difference must be evaluated against the power supply capacity and thermal design of the application. If the original design operates near power supply limits, additional margin analysis is required.

Q: Are all three parts electrically equivalent?

A: The AX7MCF1-156.2500C and AX7MCF3-156.2500C are parametrically equivalent within the Abracon ClearClock™ AX7 series. The 591KB156M250DG is functionally equivalent across all critical electrical parameters (frequency, output type, voltage, stability, temperature range) but differs in package configuration and supply current specifications.

Q: Why is the AX7MCF1-156.2500C discontinued?

A: Product discontinuation information is not provided in the technical data. Contact Abracon LLC or authorized distributors for historical discontinuation details.

Q: What certifications apply to these parts?

A: The AX7MCF1-156.2500C and AX7MCF3-156.2500C are ROHS3 Compliant and REACH Unaffected. Certification status for the 591KB156M250DG is not specified in the provided data.