AX7DAF2-270.0000C Equivalent & Substitute Parts

Part Overview

The AX7DAF2-270.0000C is a 270 MHz XO (Standard) LVDS oscillator manufactured by Abracon LLC, part of the ClearClock™ AX7 series. This crystal-based oscillator operates at 3.3V with Enable/Disable functionality in an 8-SMD, No Lead surface mount package. The part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

AX7DAF2-270.0000C

Abracon LLCIn Stock: 772AX7DAF2-270.0000C Datasheet

Current PartRFQ

591BB270M000DG

Skyworks Solutions Inc.In Stock: 1275591BB270M000DG Datasheet

MFR RecommendedRFQ

591FB270M000DG

Skyworks Solutions Inc.In Stock: 1059591FB270M000DG Datasheet

MFR RecommendedRFQ

591NB270M000DG

Skyworks Solutions Inc.In Stock: 951591NB270M000DG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AX7DAF2-270.0000C is determined by the following critical parameters:

• Frequency: 270 MHz (exact match required)
• Output Type: LVDS (exact match required)
• Supply Voltage: 3.3V (exact match required for primary substitutes)
• Function: Enable/Disable (exact match required)
• Frequency Stability: ±25ppm (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Base Resonator: Crystal (exact match required)

The substitute parts identified are from Skyworks Solutions Inc., Si591 series. These parts maintain electrical equivalence across all critical parameters while offering active product status and improved availability. Package configuration differs (6-SMD vs. 8-SMD), which may require PCB layout evaluation.

Parameter Comparison

Engineering Selection Recommendations

591NB270M000DG is the primary substitute for AX7DAF2-270.0000C. This part maintains identical electrical specifications including 3.3V supply voltage, 270 MHz frequency, LVDS output, and ±25ppm stability. The part is active in production with confirmed inventory availability. The 6-SMD package reduces footprint compared to the 8-SMD original, with a lower seated height (1.80mm vs. 1.90mm). Both parts are ROHS3 compliant with MSL 1 rating.

591BB270M000DG provides an alternative 3.3V substitute with identical electrical performance. This part is also active and available.

591FB270M000DG is electrically equivalent except for supply voltage (2.5V vs. 3.3V). This part is suitable only for applications where 2.5V operation is acceptable and the system power supply can accommodate this voltage level.

All three Skyworks substitutes are ROHS3 compliant and carry MSL 1 moisture sensitivity ratings, matching the original part's environmental compliance profile.

Frequently Asked Questions (FAQ)

Q: Can 591NB270M000DG directly replace AX7DAF2-270.0000C on existing PCBs?

A: Electrical substitution is direct. The 6-SMD package footprint differs from the 8-SMD original, requiring PCB layout evaluation. The reduced height (1.80mm vs. 1.90mm) is compatible with standard assembly processes.

Q: What is the difference between 591NB270M000DG and 591BB270M000DG?

A: Both parts are electrically identical at 270 MHz, 3.3V, LVDS output with ±25ppm stability. The difference is in the base product number designation (591NB vs. 591BB), which reflects internal Skyworks product line organization. Either part is functionally equivalent for this application.

Q: Why is 591FB270M000DG listed as a substitute if it operates at 2.5V?

A: The 591FB270M000DG is included as a substitute option for systems designed to operate at 2.5V supply voltage. It maintains all other critical parameters (frequency, output type, stability, temperature range). This part is not suitable for 3.3V-only systems.

Q: Are there package compatibility concerns with the 6-SMD vs. 8-SMD difference?

A: The footprint differs between 8-SMD (original) and 6-SMD (substitutes). PCB layout must be evaluated to confirm pad compatibility and placement. The identical body dimensions (7.00mm x 5.00mm) and reduced height of the substitute may provide layout advantages.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All substitute parts (591NB270M000DG, 591BB270M000DG, 591FB270M000DG) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original AX7DAF2-270.0000C specifications.

Q: What is the current consumption difference between the original and substitutes?

A: The original AX7DAF2-270.0000C draws 70mA maximum supply current. The Skyworks substitutes draw 100mA maximum. The disable current increases from 65mA to 75mA. These differences must be evaluated in power budget calculations for the target application.