ASCSM-24.576MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASCSM-24.576MHZ-LR-T is a MEMS-based XO (Standard) oscillator manufactured by Abracon LLC, operating at 24.576 MHz with CMOS output. This component is designed for applications requiring low-voltage operation (1.7V ~ 3.6V) with enable/disable functionality in a compact 4-UFBGA package. The product is currently obsolete, necessitating identification of functionally equivalent alternatives to maintain design continuity and ensure supply chain availability.

Substiute Parts

ASCSM-24.576MHZ-LR-T

Abracon LLCIn Stock: 936ASCSM-24.576MHZ-LR-T Datasheet

Current PartRFQ

ASCO-24.576MHZ-L-T3

Abracon LLCIn Stock: 914ASCO-24.576MHZ-L-T3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASCSM-24.576MHZ-LR-T requires matching the following critical parameters:

• Frequency: 24.576 MHz (exact match required)
• Output Type: CMOS
• Function: Enable/Disable capability
• Operating Temperature Range: -40°C ~ 85°C minimum
• Mounting Type: Surface Mount
• Regulatory Compliance: ROHS3 Compliant

The ASCO-24.576MHZ-L-T3 qualifies as a substitute based on matching frequency, CMOS output, enable/disable function, operating temperature range, surface mount configuration, and ROHS3 compliance. Differences in voltage supply range, frequency stability, and package form factor must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ASCO-24.576MHZ-L-T3 is suitable as a substitute for the obsolete ASCSM-24.576MHZ-LR-T based on the following factors:

• Both components maintain identical frequency output (24.576 MHz) and CMOS signaling
• Both support enable/disable functionality across the required operating temperature range (-40°C ~ 85°C)
• Both meet ROHS3 compliance and REACH unaffected status
• The substitute is currently in active production status, ensuring supply chain continuity

Critical design considerations for substitution:

• The ASCO operates at fixed 3.3V supply versus the ASCSM's 1.7V ~ 3.6V range. Designs requiring sub-3.3V operation require alternative evaluation.
• Frequency stability differs (±50ppm versus ±25ppm). Applications with tight frequency tolerance requirements must assess impact.
• Package transition from 4-UFBGA/CSPBGA to 4-SMD No Lead requires PCB layout modification and revalidation.

Frequently Asked Questions (FAQ)

Q: Can the ASCO-24.576MHZ-L-T3 replace the ASCSM-24.576MHZ-LR-T in all applications?

A: Substitution is valid only when the design operates at 3.3V supply voltage and can tolerate ±50ppm frequency stability. Designs requiring the extended 1.7V ~ 3.6V voltage range or ±25ppm stability require alternative component evaluation.

Q: What are the package differences between these oscillators?

A: The ASCSM uses 4-UFBGA/CSPBGA packaging, while the ASCO uses 4-SMD No Lead packaging. Both are surface mount configurations with similar footprint dimensions (1.79mm x 1.25mm versus 1.60mm x 1.20mm), but PCB layout and assembly process modifications are required.

Q: Are both components RoHS compliant?

A: Yes, both the ASCSM-24.576MHZ-LR-T and ASCO-24.576MHZ-L-T3 are ROHS3 compliant and REACH unaffected.

Q: What is the current consumption difference?

A: The ASCSM draws a maximum of 6.5mA, while the ASCO draws 6mA. This 0.5mA difference is negligible for most applications.

Q: Why is the ASCSM-24.576MHZ-LR-T obsolete?

A: The ASCSM series has been discontinued by Abracon LLC. The ASCO series represents the active product line for equivalent 24.576 MHz CMOS oscillator functionality.