AX7DBF4-644.53125C Equivalent & Substitute Parts

Part Overview

The AX7DBF4-644.53125C is a 644.53125 MHz XO (Standard) LVDS Oscillator manufactured by Abracon LLC as part of the ClearClock™ AX7 series. This surface mount crystal oscillator operates at 2.5V with enable/disable functionality and is housed in an 8-SMD, No Lead package. The part is discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing design support and procurement.

Substiute Parts

AX7DBF4-644.53125C

Abracon LLCIn Stock: 739AX7DBF4-644.53125C Datasheet

Current PartRFQ

AX7DBF1-644.53125C

Abracon LLCIn Stock: 1088AX7DBF1-644.53125C Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AX7DBF4-644.53125C are identified based on strict electrical and mechanical parameter matching. The critical parameters that define substitutability are:

• Frequency: 644.53125 MHz (exact match required)
• Output Type: LVDS (exact match required)
• Supply Voltage: 2.5V (exact match required)
• Function: Enable/Disable (exact match required)
• Frequency Stability: ±25ppm (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• Package Type: 8-SMD, No Lead (exact match required)
• Package Dimensions: 7.00mm x 5.00mm (exact match required)

Parts meeting all these parameters are classified as parametric equivalents and can be directly substituted in applications requiring the AX7DBF4-644.53125C.

Parameter Comparison

Engineering Selection Recommendations

The AX7DBF1-644.53125C is a direct parametric equivalent to the AX7DBF4-644.53125C. Both parts are manufactured by Abracon LLC within the ClearClock™ AX7 series and share identical electrical specifications, frequency output, package configuration, and compliance certifications. The parts differ only in internal design variant designation (DBF4 versus DBF1), with no impact on functional performance or application compatibility.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards. The MSL rating of 1 (Unlimited) indicates no moisture sensitivity constraints during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can the AX7DBF1-644.53125C replace the AX7DBF4-644.53125C in existing designs?

A: Yes. The AX7DBF1-644.53125C is a parametric equivalent with identical electrical specifications, frequency output, supply voltage, enable/disable function, LVDS output type, frequency stability, operating temperature range, current consumption, and package configuration. Direct substitution is supported without design modification.

Q: Are there any differences in package dimensions between these parts?

A: No. Both parts use the same 8-SMD, No Lead package with dimensions of 7.00mm x 5.00mm and maximum seated height of 1.90mm. PCB layout and footprint compatibility are identical.

Q: What is the significance of the DBF4 and DBF1 designations?

A: These designations represent internal design variants within the Abracon ClearClock™ AX7 series. Both variants meet the same electrical and mechanical specifications and are functionally interchangeable for applications requiring 644.53125 MHz LVDS oscillators with 2.5V supply and enable/disable control.

Q: Do both parts have the same compliance certifications?

A: Yes. Both the AX7DBF4-644.53125C and AX7DBF1-644.53125C are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8542.39.0001.

Q: What is the moisture sensitivity level for these oscillators?

A: Both parts have an MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints. Standard handling and storage procedures are sufficient without special desiccant or controlled humidity requirements.