AX7DAF2-311.0400C Equivalent & Substitute Parts

Part Overview

The AX7DAF2-311.0400C 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 equivalent substitute parts essential for ongoing system support and component procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	AX7DAF2-311.0400C
Manufacturer	Abracon LLC
Frequency	311.04 MHz
Output Type	LVDS
Supply Voltage	3.3V
Function	Enable/Disable
Frequency Stability	±25ppm
Operating Temperature Range	-40°C ~ 85°C
Current - Supply (Max)	70mA
Mounting Type	Surface Mount
Package / Case	8-SMD, No Lead
Size / Dimension	0.276" L x 0.197" W (7.00mm x 5.00mm)
Height - Seated (Max)	0.075" (1.90mm)
Moisture Sensitivity Level (MSL)	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution of the AX7DAF2-311.0400C is determined by strict equivalence across the following critical parameters:

Frequency: 311.04 MHz (exact match required)
Output Type: LVDS (electrical interface compatibility)
Supply Voltage: 3.3V (power supply compatibility)
Function: Enable/Disable (operational feature match)
Frequency Stability: ±25ppm (timing accuracy specification)
Operating Temperature Range: -40°C ~ 85°C (environmental compatibility)
Mounting Type: Surface Mount (PCB assembly compatibility)
Physical Footprint: 7.00mm x 5.00mm (board layout compatibility)
Compliance: ROHS3 Compliant, MSL 1 (regulatory and handling requirements)

The substitute part 590NB311M040DG from Skyworks Solutions Inc. meets all critical electrical and mechanical parameters. Minor differences in package configuration (6-SMD vs. 8-SMD) and maximum current specifications do not affect functional substitution when electrical requirements are satisfied.

Parameter Comparison

Parameter	AX7DAF2-311.0400C (Abracon)	590NB311M040DG (Skyworks)	Compatibility
Frequency	311.04 MHz	311.04 MHz	Equivalent
Output Type	LVDS	LVDS	Equivalent
Supply Voltage	3.3V	3.3V	Equivalent
Function	Enable/Disable	Enable/Disable	Equivalent
Frequency Stability	±25ppm	±25ppm	Equivalent
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	Equivalent
Current - Supply (Max)	70mA	100mA	Compatible (higher rating acceptable)
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	8-SMD, No Lead	6-SMD, No Lead	Compatible (same footprint, different lead count)
Size / Dimension	7.00mm x 5.00mm	7.00mm x 5.00mm	Equivalent
Height - Seated (Max)	1.90mm	1.80mm	Compatible (lower profile acceptable)
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Discontinued at DiGi Electronics	Active	Substitute available

Engineering Selection Recommendations

The 590NB311M040DG from Skyworks Solutions Inc. is the qualified substitute for the discontinued AX7DAF2-311.0400C. Selection is based on the following engineering criteria:

Electrical Equivalence: Identical frequency (311.04 MHz), output type (LVDS), supply voltage (3.3V), function (Enable/Disable), and frequency stability (±25ppm) ensure direct functional replacement.
Environmental Compatibility: Both parts operate across the same temperature range (-40°C ~ 85°C) and maintain equivalent moisture sensitivity ratings (MSL 1).
Regulatory Compliance: Both parts are ROHS3 compliant and carry equivalent ECCN and HTSUS classifications, ensuring compliance with applicable regulations.
Physical Compatibility: Identical footprint dimensions (7.00mm x 5.00mm) and surface mount configuration allow direct PCB placement without layout modification. The 6-SMD package of the substitute is compatible with the 8-SMD footprint of the original part.
Product Availability: The substitute part is currently active in production with confirmed inventory, providing long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can the 590NB311M040DG directly replace the AX7DAF2-311.0400C on existing PCBs?

A: Yes. Both parts share identical frequency (311.04 MHz), output type (LVDS), supply voltage (3.3V), and physical footprint (7.00mm x 5.00mm). The 6-SMD package of the substitute is compatible with the 8-SMD footprint of the original part. No PCB redesign is required.

Q: What is the difference between the 8-SMD and 6-SMD package configurations?

A: The package difference refers to the number of solder pads on the component. Both configurations maintain the same external footprint dimensions and electrical interface. The 6-SMD configuration of the substitute part is functionally equivalent for this application.

Q: Are there any current supply differences between these parts?

A: The AX7DAF2-311.0400C specifies a maximum supply current of 70mA, while the 590NB311M040DG specifies 100mA. The higher rating of the substitute part is compatible with existing power supply designs and does not create compatibility issues.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity ratings, and share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Q: What is the height difference between these oscillators?

A: The AX7DAF2-311.0400C has a maximum seated height of 1.90mm, while the 590NB311M040DG has a maximum seated height of 1.80mm. The lower profile of the substitute part is compatible with existing PCB designs and does not create clearance issues.

Q: Is the 590NB311M040DG currently available?

A: Yes. The 590NB311M040DG is an active product with confirmed inventory (832 Pcs New Original In Stock), providing reliable supply for new designs and replacement applications.

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