AX7MBF3-491.5200C Equivalent & Substitute Parts

Part Overview

The AX7MBF3-491.5200C is a 491.52 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 part is discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing design support and procurement.

Substiute Parts

AX7MBF3-491.5200C

Abracon LLCIn Stock: 1042AX7MBF3-491.5200C Datasheet

Current PartRFQ

AX7MCF1-491.5200C

Abracon LLCIn Stock: 838AX7MCF1-491.5200C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AX7MBF3-491.5200C is determined by the following critical parameters:

• Frequency Match: 491.52 MHz (exact match required)
• Output Type: CML (exact match required)
• Package Type: 8-SMD, No Lead (exact match required)
• Package Dimensions: 7.00mm x 5.00mm footprint (exact match required)
• Function: Enable/Disable capability (exact match required)
• Frequency Stability: ±25ppm (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• Supply Voltage: Acceptable range determined by circuit design requirements
• Current Consumption: Must not exceed application specifications

The AX7MCF1-491.5200C qualifies as a substitute based on matching all critical electrical and mechanical parameters. The primary difference is the supply voltage specification (1.8V versus 2.5V), which represents a design variation within the same product family and package platform.

Parameter Comparison

Engineering Selection Recommendations

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards. The AX7MCF1-491.5200C operates at a lower supply voltage (1.8V) compared to the main part (2.5V), which may provide advantages in low-power applications while maintaining identical frequency, output type, and thermal performance specifications.

Selection between these parts depends on circuit power supply architecture. If the application circuit operates at 1.8V, the AX7MCF1-491.5200C is the appropriate choice. If the circuit requires 2.5V operation, alternative sources for the AX7MBF3-491.5200C should be evaluated, as both parts are discontinued at DiGi Electronics.

Frequently Asked Questions (FAQ)

Q: Can the AX7MCF1-491.5200C replace the AX7MBF3-491.5200C in all applications?

A: Substitution is valid only if the application circuit operates at 1.8V supply voltage. The lower voltage specification of the substitute part requires verification that the receiving circuit can accommodate this voltage level. All other electrical and mechanical parameters are identical.

Q: Are the package footprints identical between these parts?

A: Yes. Both parts use the 8-SMD, No Lead package with identical dimensions of 7.00mm x 5.00mm and maximum seated height of 1.90mm. PCB layout and reflow profiles remain unchanged.

Q: What is the impact of the voltage difference on frequency stability?

A: Frequency stability remains ±25ppm for both parts across the -40°C ~ 85°C operating temperature range. The voltage specification does not affect the frequency stability rating.

Q: Are both parts subject to the same moisture handling requirements?

A: Yes. Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control measures are required during storage or handling.

Q: What should be done if neither part is available?

A: Contact Abracon LLC directly or authorized distributors to determine if alternative part numbers within the ClearClock™ AX7 series at 491.52 MHz with matching output type and package specifications are available.