AX7MBF1-312.5000C Equivalent & Substitute Parts

Part Overview

The AX7MBF1-312.5000C 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. The product is discontinued at DiGi Electronics, making identification of compatible substitute parts essential for ongoing design support and procurement.

Substiute Parts

AX7MBF1-312.5000C

Abracon LLCIn Stock: 770AX7MBF1-312.5000C Datasheet

Current PartRFQ

AX7MCF1-312.5000C

Abracon LLCIn Stock: 1051AX7MCF1-312.5000C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AX7MBF1-312.5000C is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 312.5 MHz
• Output Type: CML
• Function: Enable/Disable
• 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)
• Frequency Stability: ±25ppm
• Operating Temperature Range: -40°C ~ 85°C

Allowable Variation Parameters:

• Supply Voltage: May differ if circuit design accommodates alternative voltage levels
• Current - Supply (Max): Variation acceptable within thermal and power budget constraints

The substitute part AX7MCF1-312.5000C maintains all mandatory matching parameters while operating at a different supply voltage (1.8V instead of 2.5V), making it suitable for designs with compatible power supply architecture.

Parameter Comparison

Engineering Selection Recommendations

Both the AX7MBF1-312.5000C and AX7MCF1-312.5000C are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The primary distinction is supply voltage: the main part operates at 2.5V while the substitute operates at 1.8V.

Selection between these parts depends on circuit power supply architecture. If the design uses a 2.5V supply rail, the AX7MBF1-312.5000C is the direct match. If the design uses a 1.8V supply rail or has been adapted to support 1.8V operation, the AX7MCF1-312.5000C is the appropriate substitute. Both parts share identical frequency, output type, package dimensions, and thermal characteristics, ensuring functional equivalence within their respective voltage domains.

Frequently Asked Questions (FAQ)

Q: Can the AX7MCF1-312.5000C replace the AX7MBF1-312.5000C in an existing design?

A: Substitution is possible only if the circuit design accommodates 1.8V supply voltage operation. The oscillator's frequency, output type (CML), Enable/Disable function, and physical package are identical. Power supply voltage compatibility must be verified before implementation.

Q: Are the physical packages identical between these parts?

A: Yes. Both parts use the 8-SMD, No Lead package with identical dimensions of 0.276" L x 0.197" W (7.00mm x 5.00mm) and maximum seated height of 0.075" (1.90mm). PCB layout and footprint compatibility is assured.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both the AX7MBF1-312.5000C and AX7MCF1-312.5000C are ROHS3 compliant, REACH unaffected, and carry Moisture Sensitivity Level 1 (Unlimited). They meet identical regulatory requirements.

Q: What is the frequency stability specification for these oscillators?

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

Q: Are there any current consumption differences between these parts?

A: Current consumption specifications are identical: 68mA maximum supply current and 67mA maximum disable current. The difference in supply voltage does not affect these current ratings.