AX7DCF4-156.2500C Equivalent & Substitute Parts

Part Overview

The AX7DCF4-156.2500C is a 156.25 MHz XO (Standard) LVDS Oscillator manufactured by Abracon LLC as 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 substitute components essential for ongoing system support and procurement.

Key Parameters

Parameter	Value
Frequency	156.25 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 of the AX7DCF4-156.2500C is determined by strict equivalence across the following critical parameters:

Frequency: 156.25 MHz (exact match required)
Output Configuration: LVDS (signal type compatibility)
Supply Voltage: 1.8V (power rail compatibility)
Enable/Disable Function: Required for control compatibility
Frequency Stability: ±25ppm (timing accuracy specification)
Operating Temperature Range: -40°C ~ 85°C (environmental specification)
Package Type: 8-SMD, No Lead (PCB footprint compatibility)
Package Dimensions: 7.00mm x 5.00mm (physical fit requirement)

The AX7DCF1-156.2500C meets all these criteria and is classified as a parametric equivalent.

Parameter Comparison

Parameter	AX7DCF4-156.2500C	AX7DCF1-156.2500C	Match Status
Frequency	156.25 MHz	156.25 MHz	Identical
Output Type	LVDS	LVDS	Identical
Supply Voltage	1.8V	1.8V	Identical
Function	Enable/Disable	Enable/Disable	Identical
Frequency Stability	±25ppm	±25ppm	Identical
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Identical
Maximum Supply Current	70mA	70mA	Identical
Package Type	8-SMD, No Lead	8-SMD, No Lead	Identical
Package Dimensions	7.00mm x 5.00mm x 1.90mm	7.00mm x 5.00mm x 1.90mm	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical

Engineering Selection Recommendations

The AX7DCF1-156.2500C is a direct parametric equivalent to the AX7DCF4-156.2500C. Both components are ROHS3 compliant and carry identical electrical and mechanical specifications. The AX7DCF1-156.2500C is currently available with 1050 pieces in stock, compared to 835 pieces of the original part number. Selection between these parts is based on inventory availability and procurement lead time, as all functional and compliance parameters are equivalent.

Frequently Asked Questions (FAQ)

Q: Can the AX7DCF1-156.2500C be used as a direct replacement for the AX7DCF4-156.2500C?

A: Yes. Both parts are identical in frequency, output type, supply voltage, package configuration, and all electrical 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 package type with identical dimensions of 7.00mm x 5.00mm and maximum seated height of 1.90mm. PCB footprints are compatible.

Q: Do both parts support the same enable/disable control function?

A: Yes. Both the AX7DCF4-156.2500C and AX7DCF1-156.2500C include enable/disable functionality at 1.8V supply voltage.

Q: What is the significance of the frequency stability specification?

A: The ±25ppm frequency stability specification defines the maximum deviation from the nominal 156.25 MHz frequency across the operating temperature range of -40°C to 85°C. Both parts meet this specification identically.

Q: Are moisture handling and storage requirements the same?

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

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