AX7MBF2-640.0000C Equivalent & Substitute Parts

Part Overview

The AX7MBF2-640.0000C 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 for ongoing system support and new designs requiring this frequency and output specification.

Substiute Parts

AX7MBF2-640.0000C

Abracon LLCIn Stock: 1179AX7MBF2-640.0000C Datasheet

Current PartRFQ

591KB640M000DG

Skyworks Solutions Inc.In Stock: 954591KB640M000DG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AX7MBF2-640.0000C 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)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• Frequency Stability: ±25ppm (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Package Footprint: 7.00mm x 5.00mm (exact match required)

The substitute part 591KB640M000DG meets all critical frequency, output, function, temperature, and stability parameters. Variations in supply voltage (2.5V vs. 1.8V), package pin count (8-SMD vs. 6-SMD), and maximum current draw are secondary considerations that may require circuit-level evaluation based on system design constraints.

Parameter Comparison

Engineering Selection Recommendations

The 591KB640M000DG from Skyworks Solutions Inc. is an active product with equivalent core specifications to the discontinued AX7MBF2-640.0000C. Both components meet ROHS3 compliance and MSL 1 requirements. The substitute maintains identical frequency, output type, function, temperature range, and frequency stability parameters.

Design considerations for substitution include:

• Supply voltage difference (2.5V vs. 1.8V) requires verification of system power delivery capability and signal integrity at the lower voltage level
• Package pin count reduction (8-SMD to 6-SMD) necessitates PCB layout review and pin assignment validation
• Maximum current draw increase (68mA to 110mA) requires power budget reassessment
• Height reduction (1.90mm to 1.80mm) is compatible with existing mechanical clearance

Frequently Asked Questions (FAQ)

Q: Can the 591KB640M000DG directly replace the AX7MBF2-640.0000C without circuit modification?

A: The substitute maintains identical frequency (640 MHz), output type (CML), function (Enable/Disable), operating temperature range (-40°C ~ 85°C), and frequency stability (±25ppm). However, the supply voltage difference (2.5V vs. 1.8V) and package pin count change (8-SMD vs. 6-SMD) require circuit-level evaluation and PCB layout verification before implementation.

Q: What are the key differences between these two oscillators?

A: The primary differences are supply voltage (2.5V vs. 1.8V), package configuration (8-SMD vs. 6-SMD), maximum current draw (68mA vs. 110mA), and product status (discontinued vs. active). All critical frequency and output specifications are identical.

Q: Is the 591KB640M000DG suitable for the same applications as the AX7MBF2-640.0000C?

A: The substitute is suitable for applications requiring 640 MHz CML output with Enable/Disable functionality across the -40°C ~ 85°C temperature range. System-specific requirements regarding supply voltage, power consumption, and PCB layout must be evaluated independently.

Q: Are both parts RoHS compliant?

A: Yes, both the AX7MBF2-640.0000C and 591KB640M000DG are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What should be verified before implementing the substitute part?

A: Verify supply voltage compatibility with system power delivery, confirm PCB layout accommodates the 6-SMD package footprint, validate pin assignments match the Enable/Disable function requirements, and assess power budget impact from the increased maximum current draw.