AX7MBF3-312.5000C Equivalent & Substitute Parts

Part Overview

The AX7MBF3-312.5000C is a 312.5 MHz XO (Standard) CML oscillator manufactured by Abracon LLC, 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 measuring 7.00mm x 5.00mm. The product is discontinued at DiGi Electronics. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and maintenance applications.

Substiute Parts

AX7MBF3-312.5000C

Abracon LLCIn Stock: 848AX7MBF3-312.5000C Datasheet

Current PartRFQ

AX7MCF1-312.5000C

Abracon LLCIn Stock: 1051AX7MCF1-312.5000C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AX7MBF3-312.5000C is determined by the following critical parameters:

• Frequency: Must be 312.5 MHz (exact match required)
• Output Type: Must be CML (Common Mode Logic)
• Package Type: Must be 8-SMD, No Lead with identical footprint dimensions (7.00mm x 5.00mm)
• Operating Temperature Range: Must support -40°C ~ 85°C minimum
• Frequency Stability: Must maintain ±25ppm or better
• Function: Must include Enable/Disable capability
• RoHS Compliance: Must meet ROHS3 standard

The AX7MCF1-312.5000C qualifies as a manufacturer-recommended substitute. While the supply voltage differs (1.8V versus 2.5V), this part maintains all other critical electrical and mechanical parameters, including frequency, output type, package configuration, temperature range, and frequency stability. The voltage difference represents a design variation within the same product family rather than a functional incompatibility, provided the circuit design accommodates the lower supply voltage.

Parameter Comparison

Engineering Selection Recommendations

The AX7MCF1-312.5000C is the manufacturer-recommended substitute for the discontinued AX7MBF3-312.5000C. Both parts maintain identical RoHS3 compliance and REACH unaffected status, ensuring regulatory continuity. The substitute part is currently available in inventory (987 pcs), addressing the discontinued status of the original part.

The primary design consideration is the supply voltage reduction from 2.5V to 1.8V. This substitution is valid only when the circuit design operates at or can be adapted to operate at 1.8V supply voltage. All other electrical characteristics, including frequency, output type, frequency stability, and current consumption, remain equivalent. The identical package footprint and dimensions ensure mechanical compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the AX7MCF1-312.5000C be used as a direct drop-in replacement for the AX7MBF3-312.5000C?

A: The AX7MCF1-312.5000C is mechanically compatible (identical package, footprint, and dimensions). Electrical compatibility depends on circuit design. If your circuit operates at 1.8V supply voltage, this is a direct substitute. If your circuit requires 2.5V, circuit modification is necessary.

Q: What is the key difference between these two parts?

A: The supply voltage differs: AX7MBF3-312.5000C operates at 2.5V, while AX7MCF1-312.5000C operates at 1.8V. All other parameters, including frequency (312.5 MHz), output type (CML), package configuration (8-SMD, No Lead), and frequency stability (±25ppm), are identical.

Q: Are the package dimensions identical?

A: Yes. Both parts use the same 8-SMD, No Lead package with dimensions of 7.00mm x 5.00mm and maximum seated height of 1.90mm. No PCB layout changes are required for mechanical compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and have Moisture Sensitivity Level 1 (Unlimited). Regulatory compliance is maintained with this substitution.

Q: What is the current consumption difference?

A: Maximum supply current is 68mA for both parts. Current consumption in disable mode is 67mA for both parts. Current draw is equivalent despite the voltage difference.