AX7DAF3-625.0000C Equivalent & Substitute Parts

Part Overview

The AX7DAF3-625.0000C is a 625 MHz XO (Standard) LVDS Oscillator manufactured by Abracon LLC, part of the ClearClock™ AX7 series. This surface mount crystal oscillator operates at 3.3V with Enable/Disable functionality and is housed in an 8-SMD, No Lead package. The part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

AX7DAF3-625.0000C

Abracon LLCIn Stock: 779AX7DAF3-625.0000C Datasheet

Current PartRFQ

590FB625M000DG

Skyworks Solutions Inc.In Stock: 848590FB625M000DG Datasheet

MFR RecommendedRFQ

591BB625M000DG

Skyworks Solutions Inc.In Stock: 1208591BB625M000DG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AX7DAF3-625.0000C is determined by the following critical parameters:

• Frequency: 625 MHz (exact match required)
• Output Type: LVDS (exact match required)
• Supply Voltage: 3.3V (exact match required)
• Frequency Stability: ±25ppm (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• Function: Enable/Disable (exact match required)
• Base Resonator: Crystal (exact match required)
• Type: XO (Standard) (exact match required)

The substitute parts identified below meet all critical electrical parameters. Package configuration differences (8-SMD vs. 6-SMD) and maximum supply current variations are secondary considerations that do not affect functional equivalence for the specified electrical performance.

Parameter Comparison

Engineering Selection Recommendations

591BB625M000DG (Skyworks Solutions Inc., Si591 Series) is the primary substitute for the AX7DAF3-625.0000C. This part maintains exact electrical equivalence across all critical parameters: 625 MHz frequency, LVDS output, 3.3V supply voltage, ±25ppm frequency stability, and -40°C ~ 85°C operating temperature range. Both parts feature Enable/Disable functionality and unlimited moisture sensitivity rating. The 591BB625M000DG is currently in active production status with 1139 pieces available in inventory. The package transition from 8-SMD to 6-SMD and the marginal increase in maximum supply current (100mA vs. 70mA) do not affect functional compatibility.

590FB625M000DG (Skyworks Solutions Inc., Si590 Series) is an alternative substitute that meets all critical electrical parameters with the exception of supply voltage. This part operates at 2.5V rather than 3.3V. Selection of this part requires verification that the application circuit can accommodate 2.5V operation. The 590FB625M000DG is currently in active production status with 812 pieces available in inventory.

Frequently Asked Questions (FAQ)

Q: Can the 591BB625M000DG directly replace the AX7DAF3-625.0000C without circuit modification?

A: Yes. The 591BB625M000DG maintains electrical equivalence across all critical parameters: frequency, output type, supply voltage, frequency stability, operating temperature range, and enable/disable functionality. The package change from 8-SMD to 6-SMD requires PCB layout adjustment, but no circuit modification is necessary.

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

A: The package change affects PCB footprint and land pattern design. The physical dimensions (7.00mm x 5.00mm) remain identical, but the pin configuration differs. PCB redesign is required to accommodate the 6-SMD footprint. The reduced height (1.80mm vs. 1.90mm) may provide clearance benefits in space-constrained applications.

Q: Why is the 590FB625M000DG listed as an alternative if it operates at 2.5V?

A: The 590FB625M000DG meets all critical electrical parameters except supply voltage. It is listed as an alternative for applications where 2.5V operation is feasible or where the application circuit can be modified to support dual voltage rails. Direct substitution without circuit modification is not recommended for 3.3V-only designs.

Q: Are there compliance or certification differences between the main part and substitutes?

A: All three parts carry EAR99 ECCN classification and unlimited moisture sensitivity rating (MSL 1). The AX7DAF3-625.0000C is explicitly ROHS3 compliant. Compliance status for the Skyworks substitutes is not specified in the provided data. Verification with the manufacturer is recommended if ROHS3 compliance is a design requirement.

Q: What is the impact of increased maximum supply current on system design?

A: The substitute parts specify 100mA maximum supply current compared to 70mA for the original part. This 30mA increase applies to both active and disabled states. Power supply and decoupling capacitor sizing should be verified to accommodate the higher current specification.