ASCSM-72.000MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASCSM-72.000MHZ-LR-T is a 72 MHz MEMS-based XO (Standard) oscillator manufactured by Abracon LLC, designed for applications requiring a CMOS output with enable/disable functionality. This component operates across a wide supply voltage range of 1.7V to 3.6V and is housed in a compact 4-UFBGA, CSPBGA package measuring 1.79mm × 1.25mm.

The ASCSM-72.000MHZ-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-72.000MHZ-LR-T

Abracon LLCIn Stock: 915ASCSM-72.000MHZ-LR-T Datasheet

Current PartRFQ

ASCO-72.000MHZ-L-T3

Abracon LLCIn Stock: 1011ASCO-72.000MHZ-L-T3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ASCSM-72.000MHZ-LR-T must satisfy the following core electrical and mechanical criteria:

• Frequency: 72 MHz (exact match required)
• Output Type: CMOS
• Function: Enable/Disable capability
• Operating Temperature Range: -40°C ~ 85°C (minimum requirement)
• Mounting Type: Surface Mount
• RoHS3 Compliance

The ASCO-72.000MHZ-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 base resonator technology (Crystal vs. MEMS), supply voltage range, frequency stability, and package form factor are noted in the parameter comparison below.

Parameter Comparison

Engineering Selection Recommendations

The ASCO-72.000MHZ-L-T3 is available as an active product from Abracon LLC, ensuring ongoing supply and support. Both parts maintain ROHS3 compliance and operate across the required -40°C to 85°C temperature range.

Key considerations for selection:

• The ASCO-72.000MHZ-L-T3 operates at a fixed 3.3V supply voltage, whereas the ASCSM-72.000MHZ-LR-T supports a broader 1.7V to 3.6V range. Design circuits operating below 3.3V require the original part or alternative sources.
• Frequency stability differs: the substitute part specifies ±50ppm compared to the original ±25ppm. Applications with stringent frequency tolerance requirements must account for this difference.
• Supply current increases from 6.5mA to 8.5mA maximum, affecting power budget calculations.
• Package geometry differs (4-SMD, No Lead vs. 4-UFBGA, CSPBGA), requiring PCB layout and assembly process verification.

Frequently Asked Questions (FAQ)

Q: Can the ASCO-72.000MHZ-L-T3 directly replace the ASCSM-72.000MHZ-LR-T in all applications?

A: Direct replacement requires verification of three factors: (1) circuit supply voltage must be 3.3V or compatible with 3.3V operation, (2) PCB layout and assembly equipment must support the 4-SMD, No Lead package, and (3) application frequency stability requirements must tolerate ±50ppm performance.

Q: What is the primary difference between these two oscillators?

A: The main part uses MEMS resonator technology with a wide supply voltage range (1.7V ~ 3.6V), while the substitute uses crystal resonator technology with a fixed 3.3V supply voltage. Both deliver 72 MHz CMOS output with enable/disable control.

Q: Are both parts RoHS compliant?

A: Yes, both the ASCSM-72.000MHZ-LR-T and ASCO-72.000MHZ-L-T3 are ROHS3 compliant.

Q: Does the package size difference affect compatibility?

A: Yes. The ASCSM-72.000MHZ-LR-T uses a 4-UFBGA, CSPBGA package (1.79mm × 1.25mm), while the ASCO-72.000MHZ-L-T3 uses a 4-SMD, No Lead package (1.60mm × 1.20mm). PCB footprints, assembly processes, and placement equipment must be evaluated for compatibility.

Q: What is the frequency stability impact of substitution?

A: The substitute part specifies ±50ppm frequency stability versus ±25ppm for the original. Applications requiring tighter frequency tolerance must evaluate whether this difference affects system performance.