ASCSM-64.000MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASCSM-64.000MHZ-LR-T is a 64 MHz MEMS-based XO (Standard) oscillator manufactured by Abracon LLC, featuring 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-64.000MHZ-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-64.000MHZ-LR-T

Abracon LLCIn Stock: 994ASCSM-64.000MHZ-LR-T Datasheet

Current PartRFQ

ASCO-64.000MHZ-L-T3

Abracon LLCIn Stock: 1062ASCO-64.000MHZ-L-T3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ASCSM-64.000MHZ-LR-T must satisfy the following core electrical and mechanical criteria:

Mandatory Matching Parameters:

• Frequency: 64 MHz
• Output Type: CMOS
• Function: Enable/Disable
• Operating Temperature Range: -40°C ~ 85°C

Allowable Variations:

• Voltage - Supply: May differ if the substitute operates within a subset of the original range or at a fixed voltage compatible with system design
• Frequency Stability: May be relaxed (higher ppm tolerance) depending on application requirements
• Current - Supply (Max): May vary within acceptable power budget constraints
• Base Resonator: May transition from MEMS to Crystal technology while maintaining electrical equivalence
• Package / Case: May differ if mechanical footprint and pin configuration remain compatible with PCB layout
• Product Status: Active status preferred for long-term availability

The ASCO-64.000MHZ-L-T3 is identified as a substitute part based on matching core electrical parameters and functional requirements.

Parameter Comparison

Engineering Selection Recommendations

The ASCO-64.000MHZ-L-T3 is suitable as a substitute for the ASCSM-64.000MHZ-LR-T based on the following factors:

Electrical Compatibility: Both parts deliver 64 MHz CMOS output with Enable/Disable control across the -40°C to 85°C operating temperature range. The substitute operates at a fixed 3.3V supply voltage, which is within the original part's voltage range and is a standard industrial supply level.

Compliance Status: Both parts maintain ROHS3 compliance and EAR99 export classification, ensuring regulatory continuity.

Availability: The ASCO-64.000MHZ-L-T3 holds Active product status with confirmed inventory, providing long-term supply assurance compared to the obsolete ASCSM-64.000MHZ-LR-T.

Design Considerations: The substitute exhibits relaxed frequency stability (±50ppm versus ±25ppm) and increased maximum supply current (8.5mA versus 6.5mA). These parameters must be evaluated against specific application timing and power budget requirements. Package geometry differences (4-SMD, No Lead versus 4-UFBGA/CSPBGA) require PCB layout verification to confirm mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the ASCO-64.000MHZ-L-T3 directly replace the ASCSM-64.000MHZ-LR-T without design changes?

A: Direct replacement requires verification of three factors: (1) PCB footprint compatibility between 4-SMD, No Lead and 4-UFBGA/CSPBGA packages, (2) system tolerance of ±50ppm frequency stability versus the original ±25ppm specification, and (3) power supply design confirmation that 3.3V fixed voltage meets system requirements.

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

A: The main differences are base resonator technology (MEMS versus Crystal), supply voltage range (1.7V–3.6V versus fixed 3.3V), frequency stability tolerance (±25ppm versus ±50ppm), and package type (4-UFBGA/CSPBGA versus 4-SMD, No Lead).

Q: Are both parts RoHS compliant?

A: Yes, both the ASCSM-64.000MHZ-LR-T and ASCO-64.000MHZ-L-T3 are ROHS3 compliant.

Q: What does the Enable/Disable function provide?

A: Enable/Disable functionality allows the oscillator output to be gated on or off via a control signal, enabling power management and reducing standby current consumption.

Q: Is the ASCO-64.000MHZ-L-T3 available for immediate procurement?

A: Yes, the ASCO-64.000MHZ-L-T3 is listed as Active product status with confirmed inventory availability.