AX7MBF4-2100.0000C Equivalent & Substitute Parts

Part Overview

The AX7MBF4-2100.0000C is a 2.1 GHz XO (Standard) CML Oscillator manufactured by Abracon LLC as part of the ClearClock™ AX7 series. This surface mount crystal oscillator operates at 2.5V supply voltage with Enable/Disable functionality and is housed in an 8-SMD, No Lead package. The part is discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing design support and procurement.

Substiute Parts

AX7MBF4-2100.0000C

Abracon LLCIn Stock: 898AX7MBF4-2100.0000C Datasheet

Current PartRFQ

AX7MCF1-2100.0000C

Abracon LLCIn Stock: 996AX7MCF1-2100.0000C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AX7MBF4-2100.0000C is determined by the following critical parameters that must remain constant or compatible:

Fixed Parameters (Must Match):

• Frequency: 2.1 GHz
• Output Type: CML
• Function: Enable/Disable
• Frequency Stability: ±25ppm
• Operating Temperature Range: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SMD, No Lead
• Physical Dimensions: 0.276" L x 0.197" W (7.00mm x 5.00mm)
• Height - Seated (Max): 0.075" (1.90mm)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Variable Parameters (Allowable Differences):

• Voltage - Supply: May differ based on circuit design requirements
• Current - Supply (Max): May vary within acceptable operating margins

The AX7MCF1-2100.0000C qualifies as a substitute part because it maintains all fixed parameters while operating at a different supply voltage (1.8V instead of 2.5V). This voltage difference is acceptable only in applications designed to operate at 1.8V supply levels.

Parameter Comparison

Engineering Selection Recommendations

The AX7MCF1-2100.0000C serves as a direct substitute for the discontinued AX7MBF4-2100.0000C when the application circuit is designed to operate at 1.8V supply voltage. Both parts maintain identical frequency, output type, stability, temperature range, and physical package specifications. Both parts are ROHS3 compliant and carry MSL Level 1 rating, ensuring equivalent environmental and regulatory compliance.

Selection between these parts depends solely on the power supply voltage available in the target application. If the circuit operates at 2.5V, the AX7MBF4-2100.0000C is the appropriate choice. If the circuit operates at 1.8V, the AX7MCF1-2100.0000C is the appropriate choice. No circuit modifications are required beyond power supply voltage compatibility.

Frequently Asked Questions (FAQ)

Q: Can the AX7MCF1-2100.0000C replace the AX7MBF4-2100.0000C in a 2.5V circuit?

A: No. The AX7MCF1-2100.0000C is rated for 1.8V supply voltage. Operating it at 2.5V exceeds its maximum supply voltage rating and will result in device failure or unpredictable behavior.

Q: Can the AX7MBF4-2100.0000C replace the AX7MCF1-2100.0000C in a 1.8V circuit?

A: No. The AX7MBF4-2100.0000C is rated for 2.5V supply voltage. Operating it at 1.8V will result in insufficient supply voltage and oscillator failure.

Q: Are the physical packages identical?

A: Yes. Both parts use the same 8-SMD, No Lead package with identical dimensions (0.276" L x 0.197" W, 7.00mm x 5.00mm) and maximum seated height (0.075", 1.90mm). PCB footprints are interchangeable.

Q: Do both parts have the same frequency stability?

A: Yes. Both parts maintain ±25ppm frequency stability across the -40°C to 85°C operating temperature range.

Q: What is the difference between these parts?

A: The only difference is the supply voltage rating: AX7MBF4-2100.0000C operates at 2.5V, while AX7MCF1-2100.0000C operates at 1.8V. All other electrical and mechanical specifications are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating.