AX7DCF4-491.5200C Equivalent & Substitute Parts

Part Overview

The AX7DCF4-491.5200C is a 491.52 MHz XO (Standard) LVDS Oscillator manufactured by Abracon LLC, part of the ClearClock™ AX7 series. This surface mount crystal oscillator operates at 1.8V 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 alternatives essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Frequency	491.52 MHz
Output Type	LVDS
Supply Voltage	1.8V
Function	Enable/Disable
Frequency Stability	±25ppm
Operating Temperature Range	-40°C ~ 85°C
Maximum Supply Current	70mA
Package Type	8-SMD, No Lead
Package Dimensions	7.00mm x 5.00mm x 1.90mm (Max Height)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the AX7DCF4-491.5200C is determined by strict equivalence across the following critical parameters:

Frequency: 491.52 MHz (exact match required)
Output Configuration: LVDS (no alternative output types acceptable)
Supply Voltage: 1.8V (no voltage variation permitted)
Enable/Disable Function: Required
Frequency Stability: ±25ppm (no degradation allowed)
Operating Temperature Range: -40°C ~ 85°C (minimum coverage required)
Package Type: 8-SMD, No Lead (mechanical and electrical compatibility)
Package Dimensions: 7.00mm x 5.00mm footprint (PCB layout compatibility)

The AX7DCF1-491.5200C meets all substitution criteria as a parametric equivalent within the ClearClock™ AX7 series.

Parameter Comparison

Parameter	AX7DCF4-491.5200C (Main)	AX7DCF1-491.5200C (Substitute)
Manufacturer	Abracon LLC	Abracon LLC
Series	ClearClock™ AX7	ClearClock™ AX7
Frequency	491.52 MHz	491.52 MHz
Output Type	LVDS	LVDS
Supply Voltage	1.8V	1.8V
Function	Enable/Disable	Enable/Disable
Frequency Stability	±25ppm	±25ppm
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Maximum Supply Current	70mA	70mA
Disable Mode Current	65mA	65mA
Package Type	8-SMD, No Lead	8-SMD, No Lead
Package Dimensions	7.00mm x 5.00mm	7.00mm x 5.00mm
Maximum Height	1.90mm	1.90mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99

Engineering Selection Recommendations

Both the AX7DCF4-491.5200C and AX7DCF1-491.5200C are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The AX7DCF1-491.5200C is available with 672 pieces in new original stock, providing procurement continuity for designs currently using the discontinued AX7DCF4-491.5200C. Both parts carry identical electrical specifications, frequency stability, and thermal operating ranges, ensuring direct functional equivalence in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can the AX7DCF1-491.5200C be used as a direct replacement for the AX7DCF4-491.5200C?

A: Yes. Both parts are parametric equivalents with identical frequency, output type, supply voltage, enable/disable function, frequency stability, operating temperature range, and package specifications. No circuit modifications are required.

Q: Are there any differences in the 8-SMD, No Lead package between these parts?

A: No. Both parts use the same 8-SMD, No Lead package with identical 7.00mm x 5.00mm footprint and 1.90mm maximum height, ensuring PCB layout compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the AX7DCF4-491.5200C and AX7DCF1-491.5200C are ROHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification.

Q: What is the moisture sensitivity level for these oscillators?

A: Both parts have Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Are the current consumption specifications identical?

A: Yes. Both parts have maximum supply current of 70mA in normal operation and 65mA in disable mode.

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