ASCSM-12.288MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASCSM-12.288MHZ-LR-T is a 12.288 MHz MEMS-based XO (Standard) oscillator manufactured by Abracon LLC. This component operates across a wide supply voltage range of 1.7V to 3.6V with CMOS output and Enable/Disable functionality. The part is classified as Obsolete, necessitating identification of suitable substitute components for ongoing production and maintenance applications. The MEMS resonator technology provides compact form factor and low power consumption characteristics.

Substiute Parts

ASCSM-12.288MHZ-LR-T

Abracon LLCIn Stock: 1043ASCSM-12.288MHZ-LR-T Datasheet

Current PartRFQ

ASCO-12.288MHZ-L-T3

Abracon LLCIn Stock: 933ASCO-12.288MHZ-L-T3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASCSM-12.288MHZ-LR-T is determined by the following critical parameters:

Frequency Match: The substitute part must operate at 12.288 MHz to maintain system timing requirements.

Output Type: CMOS output is required for direct signal compatibility with downstream circuitry.

Enable/Disable Function: The substitute must provide Enable/Disable control capability.

Operating Temperature Range: The substitute must support the -40°C to 85°C operating window.

Supply Voltage Compatibility: The substitute voltage range must overlap with or encompass the 1.7V to 3.6V requirement. Parts with narrower voltage ranges (such as 3.3V only) are acceptable if the application operates within that voltage window.

Mounting Type: Surface mount technology is required for PCB integration.

Compliance Standards: RoHS3 compliance and REACH unaffected status are mandatory for regulatory adherence.

The ASCO-12.288MHZ-L-T3 qualifies as a substitute based on matching frequency, output type, function, operating temperature, and compliance requirements. The voltage specification difference (3.3V fixed versus 1.7V-3.6V range) represents a narrower operating window and must be evaluated against specific application voltage requirements.

Parameter Comparison

Engineering Selection Recommendations

The ASCO-12.288MHZ-L-T3 is an active product substitute for the obsolete ASCSM-12.288MHZ-LR-T. Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for new designs and production continuity.

Key differences requiring evaluation:

Voltage Supply: The substitute operates at fixed 3.3V rather than the wide 1.7V to 3.6V range of the main part. Selection depends on whether the application circuit operates at 3.3V supply voltage.

Frequency Stability: The substitute exhibits ±50ppm stability compared to ±25ppm for the main part. Applications with stringent frequency tolerance requirements must account for this difference.

Current Consumption: The substitute draws 4.5mA maximum supply current, lower than the main part's 6.5mA, providing improved power efficiency.

Package Form Factor: The substitute uses 4-SMD No Lead packaging versus 4-UFBGA/CSPBGA for the main part. PCB layout and assembly process compatibility must be confirmed.

Resonator Technology: The main part uses MEMS technology while the substitute uses crystal resonator technology. Both provide equivalent frequency stability within their specified ranges.

Frequently Asked Questions (FAQ)

Q: Can the ASCO-12.288MHZ-L-T3 directly replace the ASCSM-12.288MHZ-LR-T in all applications?

A: Direct replacement is possible only if the application circuit operates at 3.3V supply voltage and the PCB layout accommodates the 4-SMD No Lead package. The frequency and output characteristics are compatible, but voltage supply and package differences must be verified against specific design requirements.

Q: What is the impact of the frequency stability difference between ±25ppm and ±50ppm?

A: Frequency stability tolerance depends on the application's timing requirements. For applications with tight frequency tolerance specifications, the main part's ±25ppm specification provides tighter control. The substitute's ±50ppm specification is suitable for applications with broader tolerance windows.

Q: Are there package compatibility concerns when switching from 4-UFBGA/CSPBGA to 4-SMD No Lead?

A: Yes. The packages have different footprints and assembly requirements. PCB layout modifications and assembly process adjustments may be necessary. Physical dimensions are similar (1.79mm x 1.25mm versus 1.60mm x 1.20mm), but the package type fundamentally differs.

Q: Does the substitute part meet the same regulatory compliance standards?

A: Yes. Both the main part and substitute are ROHS3 compliant and REACH unaffected, satisfying equivalent regulatory requirements.

Q: What is the significance of the main part being classified as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The substitute part, classified as Active, ensures continued availability for production and maintenance applications.

Q: How does the lower current consumption of the substitute affect system design?

A: The substitute's 4.5mA maximum supply current versus the main part's 6.5mA represents approximately 31% lower power consumption. This may reduce thermal load and power supply requirements in the overall system design.