AX7MBF1-640.0000C Equivalent & Substitute Parts

Part Overview

The AX7MBF1-640.0000C is a 640 MHz XO (Standard) CML oscillator manufactured by Abracon LLC, part of the ClearClock™ AX7 series. This component operates at 2.5V with Enable/Disable functionality and is housed in an 8-SMD, No Lead package. The product is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain core electrical and mechanical compatibility for system integration.

Substiute Parts

AX7MBF1-640.0000C

Abracon LLCIn Stock: 938AX7MBF1-640.0000C Datasheet

Current PartRFQ

591KB640M000DG

Skyworks Solutions Inc.In Stock: 954591KB640M000DG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AX7MBF1-640.0000C is determined by the following critical parameters:

• Frequency: 640 MHz (exact match required)
• Output Type: CML (exact match required)
• Function: Enable/Disable capability (exact match required)
• Frequency Stability: ±25ppm (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

The substitute part 591KB640M000DG from Skyworks Solutions Inc. meets all critical electrical parameters. Mechanical differences exist in package configuration (6-SMD vs. 8-SMD) and supply voltage (1.8V vs. 2.5V), which require circuit-level evaluation for compatibility in specific applications.

Parameter Comparison

Engineering Selection Recommendations

The 591KB640M000DG qualifies as a functional substitute based on matching electrical specifications: identical 640 MHz frequency, CML output, Enable/Disable function, ±25ppm stability, and -40°C ~ 85°C operating range. Both components maintain ROHS3 compliance and MSL 1 rating.

Substitution feasibility depends on circuit design accommodation of the following differences:

• Supply Voltage: The substitute operates at 1.8V versus the original 2.5V. Voltage regulation or level-shifting circuitry may be required depending on system power architecture.
• Package Configuration: The substitute uses 6-SMD versus 8-SMD pinout. PCB layout and footprint redesign is necessary.
• Current Consumption: The substitute draws 110mA maximum supply current versus 68mA for the original, representing a 42mA increase. Power budget analysis is required.

The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 591KB640M000DG directly replace the AX7MBF1-640.0000C without circuit modifications?

A: Direct replacement is not possible due to differences in supply voltage (1.8V vs. 2.5V) and package configuration (6-SMD vs. 8-SMD). Circuit redesign and PCB layout changes are required.

Q: What are the critical parameters that must match for substitution?

A: Frequency (640 MHz), output type (CML), function (Enable/Disable), frequency stability (±25ppm), operating temperature range (-40°C ~ 85°C), and compliance certifications (ROHS3, MSL 1) must be identical.

Q: Does the higher current consumption of the substitute affect system design?

A: The substitute draws 42mA additional current at maximum supply. Power budget analysis and thermal management review are necessary to confirm system compatibility.

Q: Are both parts suitable for the same environmental conditions?

A: Yes. Both components operate across -40°C ~ 85°C and maintain MSL 1 (Unlimited) moisture sensitivity rating, ensuring equivalent environmental performance.

Q: What is the impact of the package size difference?

A: The substitute is 0.004" (0.10mm) shorter in seated height and uses a different SMD pin configuration. PCB footprint and assembly process validation are required.