ASCSM-24.000MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASCSM-24.000MHZ-LR-T is a 24 MHz MEMS-based XO (Standard) CMOS oscillator manufactured by Abracon LLC, designed for applications requiring low-voltage operation across 1.7V to 3.6V supply ranges. This component features Enable/Disable functionality and is housed in a compact 4-UFBGA/CSPBGA package measuring 1.79mm × 1.25mm with a maximum seated height of 0.69mm.

The ASCSM-24.000MHZ-LR-T has reached obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

ASCSM-24.000MHZ-LR-T

Abracon LLCIn Stock: 806ASCSM-24.000MHZ-LR-T Datasheet

Current PartRFQ

ASCO-24.000MHZ-L-T3

Abracon LLCIn Stock: 753ASCO-24.000MHZ-L-T3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASCSM-24.000MHZ-LR-T is evaluated based on the following critical parameters:

• Frequency Match: 24 MHz (exact match required)
• Output Type: CMOS (exact match required)
• Function: Enable/Disable capability (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• Voltage Supply Compatibility: The original part operates across 1.7V ~ 3.6V; substitute parts must support the voltage range of the target application
• Frequency Stability: ±25ppm or better (tighter tolerance preferred)
• Package Type: Surface mount with compatible pinout and footprint
• Regulatory Compliance: RoHS3 and REACH compliance maintained

The ASCO-24.000MHZ-L-T3 qualifies as a substitute based on matching frequency, output type, function, operating temperature, and regulatory compliance. However, the voltage supply range differs: the substitute operates at 3.3V only, whereas the original supports 1.7V ~ 3.6V. This substitution is valid only for applications designed for 3.3V operation.

Parameter Comparison

Engineering Selection Recommendations

The ASCO-24.000MHZ-L-T3 is an active product from the same manufacturer, ensuring continued availability and support. Both components maintain ROHS3 and REACH compliance, meeting current regulatory requirements.

Key considerations for selection:

Voltage Supply Range: The original ASCSM operates across 1.7V ~ 3.6V, providing flexibility for low-voltage applications. The ASCO substitute is fixed at 3.3V. Substitution is appropriate only for designs operating at 3.3V nominal supply voltage.

Resonator Technology: The original uses MEMS technology; the substitute uses crystal-based resonators. Both technologies deliver the required 24 MHz frequency with CMOS output and Enable/Disable function.

Frequency Stability: The original specifies ±25ppm; the substitute specifies ±50ppm. Applications with tighter frequency tolerance requirements may require evaluation of the substitute's performance against design specifications.

Package Compatibility: The original uses 4-UFBGA/CSPBGA; the substitute uses 4-SMD No Lead. Physical footprint and PCB layout compatibility must be verified before implementation.

Current Consumption: Both parts operate within similar current budgets (6mA to 6.5mA maximum). The original's disable current specification (15µA) is not provided for the substitute.

Frequently Asked Questions (FAQ)

Q: Can the ASCO-24.000MHZ-L-T3 replace the ASCSM-24.000MHZ-LR-T in all applications?

A: No. The substitute is compatible only with applications designed for 3.3V operation. The original part supports 1.7V to 3.6V; the substitute operates at 3.3V only. Verify your circuit's supply voltage before substitution.

Q: What is the difference between MEMS and crystal-based oscillators?

A: Both technologies produce the required 24 MHz CMOS output with Enable/Disable function. The original uses MEMS resonators; the substitute uses crystal resonators. The substitute specifies ±50ppm frequency stability versus the original's ±25ppm. Evaluate whether your application tolerates the wider frequency tolerance.

Q: Are the packages physically compatible?

A: No. The original uses 4-UFBGA/CSPBGA (1.79mm × 1.25mm); the substitute uses 4-SMD No Lead (1.60mm × 1.20mm). PCB footprint and layout must be redesigned for the substitute package. Verify pinout compatibility with the manufacturer's datasheets.

Q: Is the ASCO-24.000MHZ-L-T3 currently available?

A: Yes. The ASCO series is active product status with 741 pieces in stock, ensuring availability for production and field replacement needs.

Q: What compliance certifications apply to both parts?

A: Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components in most markets.

Q: Does the substitute support the same disable current as the original?

A: The original specifies 15µA maximum disable current. The substitute's disable current specification is not provided in the available data. Consult the ASCO-24.000MHZ-L-T3 datasheet for disable current performance if this parameter is critical to your application.