ASCSM-1.8432MHZ-LY-T Equivalent & Substitute Parts

Part Overview

The ASCSM-1.8432MHZ-LY-T is a 1.8432 MHz MEMS-based XO (Standard) CMOS oscillator manufactured by Abracon LLC. This component operates across a wide supply voltage range of 1.7V to 3.6V and features Enable/Disable functionality in a compact 4-UFBGA/CSPBGA package. The product is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs requiring this frequency specification.

Substiute Parts

ASCSM-1.8432MHZ-LY-T

Abracon LLCIn Stock: 893ASCSM-1.8432MHZ-LY-T Datasheet

Current PartRFQ

ASCO-1.8432MHZ-L-T3

Abracon LLCIn Stock: 961ASCO-1.8432MHZ-L-T3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The ASCO-1.8432MHZ-L-T3 is identified as a substitute for the ASCSM-1.8432MHZ-LY-T based on the following critical parameters:

Matching Parameters:

• Frequency: 1.8432 MHz (identical)
• Output Type: CMOS (identical)
• Function: Enable/Disable (identical)
• Operating Temperature Range: -40°C ~ 85°C (identical)
• Mounting Type: Surface Mount (identical)
• RoHS3 Compliance: Both parts meet ROHS3 requirements

Key Differences Requiring Evaluation:

• Base Resonator: MEMS (main part) vs. Crystal (substitute)
• Supply Voltage: 1.7V ~ 3.6V (main part) vs. 3.3V (substitute)
• Frequency Stability: ±10ppm (main part) vs. ±50ppm (substitute)
• Package: 4-UFBGA/CSPBGA (main part) vs. 4-SMD, No Lead (substitute)
• Current Supply (Max): 6.5mA (main part) vs. 4.5mA (substitute)

Substitution is valid when the application can accommodate the narrower voltage specification (3.3V fixed supply), the relaxed frequency stability tolerance (±50ppm), and the different package footprint (4-SMD, No Lead).

Parameter Comparison

Engineering Selection Recommendations

The ASCO-1.8432MHZ-L-T3 is suitable as a substitute when the following conditions are met:

1. Supply Voltage Compatibility: The application must operate at a fixed 3.3V supply. The ASCO part does not support the extended 1.7V to 3.6V range of the original ASCSM part. Designs requiring operation below 3.0V or above 3.6V cannot use this substitute.

2. Frequency Stability Requirements: Applications tolerating ±50ppm frequency stability can proceed with substitution. Systems requiring the tighter ±10ppm specification of the original part must seek alternative solutions.

3. Package Footprint Verification: PCB layout must accommodate the 4-SMD, No Lead package. While dimensions are similar (1.60mm x 1.20mm vs. 1.79mm x 1.25mm), the package type differs fundamentally from the 4-UFBGA/CSPBGA original. Footprint redesign may be necessary.

4. Compliance Status: Both parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory continuity.

5. Active Product Status: The ASCO-1.8432MHZ-L-T3 is an active product with confirmed inventory availability (902 Pcs), providing long-term supply assurance compared to the obsolete ASCSM part.

Frequently Asked Questions (FAQ)

Q: Can the ASCO-1.8432MHZ-L-T3 directly replace the ASCSM-1.8432MHZ-LY-T without PCB modifications?

A: No. While both parts are 1.8432 MHz CMOS oscillators with Enable/Disable function, the package types differ (4-SMD, No Lead vs. 4-UFBGA/CSPBGA). PCB footprint redesign is required. Additionally, the supply voltage specification differs (3.3V fixed vs. 1.7V ~ 3.6V range).

Q: What is the impact of the frequency stability difference (±10ppm vs. ±50ppm)?

A: Frequency stability tolerance depends on application requirements. For serial communication protocols, data acquisition, or timing-sensitive functions, the ±50ppm specification of the substitute may introduce measurable frequency error. Evaluate system tolerance before substitution.

Q: Is the ASCO part suitable for low-voltage applications below 3.0V?

A: No. The ASCO-1.8432MHZ-L-T3 operates at 3.3V fixed supply only. Applications requiring operation at 1.7V, 1.8V, or 2.5V cannot use this substitute. The original ASCSM part's 1.7V ~ 3.6V range is not matched.

Q: What are the power consumption implications of substitution?

A: The ASCO substitute draws 4.5mA maximum supply current compared to 6.5mA for the original ASCSM part, representing a 30% reduction. Disable mode current for the ASCO part is not specified in available data.

Q: Are both parts from the same manufacturer?

A: Yes. Both the ASCSM-1.8432MHZ-LY-T and ASCO-1.8432MHZ-L-T3 are manufactured by Abracon LLC, ensuring consistent quality standards and support.

Q: What is the physical size difference between the two packages?

A: The ASCO part (1.60mm x 1.20mm) is slightly smaller than the ASCSM part (1.79mm x 1.25mm). Height specifications are nearly identical (0.70mm vs. 0.69mm). Verify PCB layout clearances for the new package footprint.