AX7MBF1-125.0000C Equivalent & Substitute Parts

Part Overview

The AX7MBF1-125.0000C is a 125 MHz XO (Standard) CML oscillator manufactured by Abracon LLC, part of the ClearClock™ AX7 series. This surface mount device operates at 2.5V with Enable/Disable functionality and is housed in an 8-SMD, No Lead package measuring 7.00mm x 5.00mm. The product is discontinued at DiGi Electronics, making identification of compatible substitute parts essential for ongoing design support and procurement.

Substiute Parts

AX7MBF1-125.0000C

Abracon LLCIn Stock: 1023AX7MBF1-125.0000C Datasheet

Current PartRFQ

591KB125M000DG

Skyworks Solutions Inc.In Stock: 1078591KB125M000DG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AX7MBF1-125.0000C is determined by the following critical parameters:

• Frequency Match: 125 MHz (exact)
• Output Type: CML (exact)
• Function: Enable/Disable capability (exact)
• Operating Temperature Range: -40°C ~ 85°C (exact)
• Frequency Stability: ±25ppm (exact)
• Mounting Type: Surface Mount (exact)
• Footprint Compatibility: 7.00mm x 5.00mm (exact)

The 591KB125M000DG from Skyworks Solutions Inc. meets all critical electrical and mechanical parameters. While the substitute operates at 1.8V (lower supply voltage) and uses a 6-SMD package (versus 8-SMD), these differences do not prevent functional substitution when the design accommodates the lower voltage requirement and the footprint is compatible with the smaller package form factor.

Parameter Comparison

Engineering Selection Recommendations

The 591KB125M000DG is the manufacturer-recommended substitute for the discontinued AX7MBF1-125.0000C. Both devices share identical frequency, output type, function, temperature range, and frequency stability specifications. The Skyworks part is currently in active production status, ensuring long-term availability.

Design considerations for substitution:

• Voltage Compatibility: The substitute operates at 1.8V versus the original 2.5V. Verify that the design power supply and signal chain support 1.8V operation.
• Package Transition: The substitute uses a 6-SMD package versus the original 8-SMD. Confirm PCB footprint compatibility; both share identical 7.00mm x 5.00mm dimensions.
• Current Draw: The substitute draws up to 110mA maximum supply current compared to 68mA for the original. Ensure power delivery capacity is adequate.
• Compliance: Both devices meet MSL 1 (Unlimited) moisture sensitivity and EAR99 export classification requirements.

Frequently Asked Questions (FAQ)

Q: Can the 591KB125M000DG directly replace the AX7MBF1-125.0000C without PCB modifications?

A: Direct replacement is possible if the design accommodates 1.8V operation and the PCB footprint accepts the 6-SMD package. Both devices occupy the same 7.00mm x 5.00mm footprint area. Verify signal integrity and power supply compatibility before implementation.

Q: What is the primary difference between these two oscillators?

A: The main differences are supply voltage (2.5V vs. 1.8V), package pin count (8-SMD vs. 6-SMD), and maximum supply current (68mA vs. 110mA). All critical electrical parameters—frequency, output type, stability, and temperature range—are identical.

Q: Is the Skyworks substitute suitable for high-reliability applications?

A: Both devices meet MSL 1 (Unlimited) moisture sensitivity and share identical frequency stability (±25ppm) and operating temperature range (-40°C ~ 85°C). The Skyworks part is in active production, supporting long-term supply chain stability. Verify compliance requirements specific to your application.

Q: How do I confirm PCB compatibility with the 6-SMD package?

A: Both oscillators share the same 7.00mm x 5.00mm footprint dimensions. The difference is in the number of solder pads (8 vs. 6). Obtain the detailed pinout and land pattern specifications from each manufacturer's datasheet to confirm electrical and mechanical alignment with your PCB design.

Q: What certifications apply to both parts?

A: Both devices are classified as EAR99 for export control and HTSUS 8542.39.0001 for tariff purposes. The AX7MBF1-125.0000C is ROHS3 compliant. Verify specific compliance requirements for your end application and region.