ASCSM-48.000MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASCSM-48.000MHZ-LR-T is a 48 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-48.000MHZ-LR-T has reached obsolete product status. Identifying suitable substitute components is necessary to maintain design continuity and ensure continued availability for production and maintenance applications.

Substiute Parts

ASCSM-48.000MHZ-LR-T

Abracon LLCIn Stock: 1039ASCSM-48.000MHZ-LR-T Datasheet

Current PartRFQ

ASCO-48.000MHZ-L-T3

Abracon LLCIn Stock: 948ASCO-48.000MHZ-L-T3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ASCSM-48.000MHZ-LR-T is determined by the following critical parameters:

• Frequency Match: 48 MHz (exact)
• Output Configuration: CMOS
• Enable/Disable Function: Required
• Operating Temperature Range: -40°C ~ 85°C (minimum requirement)
• Frequency Stability: ±25ppm or better
• RoHS3 Compliance: Required
• Package Compatibility: Surface mount with compatible footprint dimensions

The ASCO-48.000MHZ-L-T3 qualifies as a direct substitute based on matching frequency, CMOS output, enable/disable functionality, identical operating temperature range, and RoHS3 compliance. However, voltage supply range and frequency stability differ and must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ASCO-48.000MHZ-L-T3 is available as an active product from Abracon LLC and maintains ROHS3 compliance, making it suitable for applications where the ASCSM-48.000MHZ-LR-T is no longer procurable.

Selection of the ASCO-48.000MHZ-L-T3 requires verification that the following design constraints are satisfied:

• The application operates at 3.3V supply voltage (the substitute is fixed at 3.3V, whereas the main part supports 1.7V to 3.6V)
• Frequency stability of ±50ppm is acceptable (the substitute has wider tolerance than the main part's ±25ppm)
• The 4-SMD, No Lead package footprint is compatible with the PCB layout
• Physical dimensions (1.60mm × 1.20mm) and height (0.70mm) fit within board space constraints

Both components are manufactured by the same supplier, reducing qualification risk for established supply chains.

Frequently Asked Questions (FAQ)

Q: Can the ASCO-48.000MHZ-L-T3 directly replace the ASCSM-48.000MHZ-LR-T without design changes?

A: Direct replacement requires verification of three factors: (1) the application's power supply is fixed at 3.3V or can tolerate the substitute's single voltage specification, (2) the PCB footprint accommodates the 4-SMD, No Lead package, and (3) the ±50ppm frequency stability meets system timing requirements.

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 to 3.6V) and tighter frequency stability (±25ppm). The substitute uses crystal resonator technology, operates at fixed 3.3V, and has wider frequency stability (±50ppm).

Q: Are both parts RoHS compliant?

A: Yes, both the ASCSM-48.000MHZ-LR-T and ASCO-48.000MHZ-L-T3 are ROHS3 compliant.

Q: What is the package difference, and does it affect PCB design?

A: The main part uses 4-UFBGA/CSPBGA packaging (1.79mm × 1.25mm), while the substitute uses 4-SMD, No Lead packaging (1.60mm × 1.20mm). The substitute is slightly smaller. PCB footprint compatibility must be verified before implementation.

Q: Is the substitute part currently in stock?

A: The ASCO-48.000MHZ-L-T3 maintains active product status with 936 pieces available as new original stock, compared to the obsolete ASCSM-48.000MHZ-LR-T with 976 pieces remaining inventory.