AX7DAF3-311.0400C Equivalent & Substitute Parts

Part Overview

The AX7DAF3-311.0400C is a 311.04 MHz XO (Standard) LVDS Oscillator manufactured by Abracon LLC, part of the ClearClock™ AX7 series. This surface mount oscillator operates at 3.3V with Enable/Disable functionality and is housed in an 8-SMD, No Lead package. The product is discontinued at DiGi Electronics, making identification of compatible substitute parts essential for ongoing system support and procurement.

Substiute Parts

AX7DAF3-311.0400C

Abracon LLCIn Stock: 937AX7DAF3-311.0400C Datasheet

Current PartRFQ

590NB311M040DG

Skyworks Solutions Inc.In Stock: 864590NB311M040DG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AX7DAF3-311.0400C is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Frequency: 311.04 MHz (exact match required)
• Output Type: LVDS (differential signaling compatibility)
• Supply Voltage: 3.3V (power supply compatibility)
• Function: Enable/Disable (control interface compatibility)
• Frequency Stability: ±25ppm (timing accuracy requirement)
• Operating Temperature Range: -40°C ~ 85°C (environmental specification)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Package Footprint: 7.00mm x 5.00mm (board layout compatibility)

The substitute part 590NB311M040DG from Skyworks Solutions Inc. meets all critical electrical parameters. While the package configuration differs (6-SMD vs. 8-SMD), the physical footprint dimensions and maximum seated height remain compatible with the original design constraints.

Parameter Comparison

Engineering Selection Recommendations

The 590NB311M040DG from Skyworks Solutions Inc. (Si590 series) is the qualified substitute for the discontinued AX7DAF3-311.0400C. Selection is based on the following engineering criteria:

Electrical Compatibility: All critical electrical parameters align exactly, including frequency, output type, supply voltage, function, frequency stability, and operating temperature range. The substitute's maximum supply current of 100mA exceeds the original specification of 70mA, providing additional design margin.

Mechanical Compatibility: Both parts share identical package footprint dimensions (7.00mm x 5.00mm). The substitute's maximum seated height of 1.80mm is lower than the original 1.90mm, ensuring compatibility with existing PCB assembly clearances.

Compliance Status: The substitute part maintains equivalent compliance certifications (RoHS3, REACH Unaffected, EAR99 ECCN classification) and moisture sensitivity level (MSL 1 - Unlimited), ensuring regulatory and environmental compatibility.

Product Availability: The substitute is currently in active production status with confirmed inventory availability, addressing the discontinuation of the original part.

Package Configuration Consideration: The substitute uses a 6-SMD configuration versus the original 8-SMD. PCB layout verification is required to confirm pin assignment compatibility and signal routing alignment with the original design.

Frequently Asked Questions (FAQ)

Q: Can the 590NB311M040DG directly replace the AX7DAF3-311.0400C without PCB modifications?

A: Direct replacement requires verification of pin assignments and signal routing. While both parts share identical footprint dimensions and electrical specifications, the different SMD pin counts (6 vs. 8) necessitate confirmation that all required signals are present on the substitute part and routed to the same PCB locations.

Q: What is the impact of the higher maximum supply current (100mA vs. 70mA) on system design?

A: The substitute's higher current rating is compatible with the original design. Power supply and current limiting circuits designed for 70mA will operate safely with a component rated for 100mA. No circuit modifications are required.

Q: Are there any thermal or reliability differences between these oscillators?

A: Both parts operate across the identical temperature range (-40°C ~ 85°C) and maintain the same frequency stability specification (±25ppm). The substitute's lower seated height (1.80mm vs. 1.90mm) may provide marginal thermal benefits in confined PCB assemblies, but no significant reliability differences are indicated by the provided specifications.

Q: What compliance certifications apply to the substitute part?

A: The 590NB311M040DG maintains RoHS3 compliance, REACH Unaffected status, and EAR99 ECCN classification, matching the regulatory profile of the original part.

Q: Is the Si590 series suitable for high-reliability applications?

A: Substitution suitability depends on application-specific reliability requirements. Both parts are rated for industrial temperature ranges and carry equivalent compliance certifications. Application-specific qualification testing may be required based on system criticality and end-use environment.