AX7DAF3-320.0000C Equivalent & Substitute Parts

Part Overview

The AX7DAF3-320.0000C is a 320 MHz XO (Standard) LVDS oscillator manufactured by Abracon LLC, part of the ClearClock™ AX7 series. This surface mount device 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 design support and procurement.

Substiute Parts

AX7DAF3-320.0000C

Abracon LLCIn Stock: 850AX7DAF3-320.0000C Datasheet

Current PartRFQ

591FB320M000DG

Skyworks Solutions Inc.In Stock: 792591FB320M000DG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AX7DAF3-320.0000C is determined by the following critical parameters:

• Frequency: 320 MHz (exact match required)
• Output Type: LVDS (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)
• Base Resonator: Crystal (exact match required)
• Type: XO (Standard) (exact match required)

The substitute part 591FB320M000DG from Skyworks Solutions Inc. meets all critical frequency, output, functional, and environmental specifications. Variations in supply voltage (2.5V vs. 3.3V), package configuration (6-SMD vs. 8-SMD), and current consumption are acceptable within the substitution framework when circuit design accommodates these differences.

Parameter Comparison

Engineering Selection Recommendations

The 591FB320M000DG from Skyworks Solutions Inc. is the manufacturer-recommended substitute for the discontinued AX7DAF3-320.0000C. Both parts maintain identical frequency, output type, function, temperature range, and frequency stability specifications. The substitute is currently in active production status, ensuring long-term availability.

Design considerations for substitution include:

• Supply Voltage Difference: The substitute operates at 2.5V versus the original 3.3V. Circuit design must accommodate this lower voltage requirement or include appropriate voltage regulation.
• Package Configuration: The substitute uses a 6-SMD package versus the original 8-SMD package. PCB layout and footprint modifications are required.
• Current Consumption: The substitute draws up to 100mA maximum supply current compared to 70mA for the original. Power supply design must account for this increased current draw.
• Height Variation: The substitute has a maximum seated height of 0.071" (1.80mm) versus 0.075" (1.90mm) for the original, representing a negligible difference for most applications.

Both parts maintain identical compliance certifications (ROHS3, EAR99, HTSUS 8542.39.0001) and moisture sensitivity levels (MSL 1).

Frequently Asked Questions (FAQ)

Q: Can the 591FB320M000DG directly replace the AX7DAF3-320.0000C without circuit modifications?

A: Direct replacement requires circuit design review. The substitute operates at 2.5V instead of 3.3V and uses a different package configuration (6-SMD vs. 8-SMD). Voltage compatibility and PCB footprint changes must be evaluated.

Q: Are the LVDS output characteristics identical between these parts?

A: Both parts provide LVDS output at 320 MHz with ±25ppm frequency stability and enable/disable functionality. Output signal characteristics are equivalent for the specified operating conditions.

Q: What is the impact of the package change from 8-SMD to 6-SMD?

A: The package change requires PCB layout modification and new footprint design. The physical dimensions (7.00mm x 5.00mm) remain identical, but the lead configuration differs. Mechanical clearance and assembly process compatibility must be verified.

Q: Does the increased current consumption of the substitute affect power supply design?

A: The substitute draws up to 100mA maximum supply current versus 70mA for the original. Power supply capacity and thermal management must be re-evaluated to accommodate the 30mA increase.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both parts operate across -40°C to 85°C, maintaining ±25ppm frequency stability throughout this range.

Q: What is the significance of the MSL 1 rating for both parts?

A: MSL 1 (Unlimited) indicates unlimited shelf life without moisture bake-out requirements, simplifying inventory management and storage procedures for both parts.