ASCSM-80.000MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASCSM-80.000MHZ-LR-T is an 80 MHz MEMS-based XO (Standard) oscillator manufactured by Abracon LLC. This component operates across a wide supply voltage range of 1.7V to 3.6V with CMOS output and Enable/Disable functionality. The part is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs.

Substiute Parts

ASCSM-80.000MHZ-LR-T

Abracon LLCIn Stock: 1124ASCSM-80.000MHZ-LR-T Datasheet

Current PartRFQ

ASCO-80.000MHZ-L-T3

Abracon LLCIn Stock: 1137ASCO-80.000MHZ-L-T3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The ASCO-80.000MHZ-L-T3 qualifies as a substitute based on the following alignment of critical parameters:

• Frequency Match: Both parts operate at 80 MHz
• Output Compatibility: Both provide CMOS output
• Function Equivalence: Both include Enable/Disable capability
• Operating Temperature Range: Both support -40°C ~ 85°C
• Surface Mount Configuration: Both are surface-mount components
• Regulatory Compliance: Both are ROHS3 compliant and REACH unaffected

The primary differences are the supply voltage range (3.3V fixed versus 1.7V ~ 3.6V), frequency stability (±50ppm versus ±25ppm), and base resonator technology (Crystal versus MEMS). These differences must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ASCO-80.000MHZ-L-T3 is suitable as a substitute for the obsolete ASCSM-80.000MHZ-LR-T in applications where the following conditions are met:

• System supply voltage is fixed at 3.3V or can be adapted to 3.3V operation
• Frequency stability of ±50ppm is acceptable for the application
• Package footprint change from 4-UFBGA/CSPBGA to 4-SMD No Lead is compatible with PCB layout
• Higher maximum supply current (8.5mA versus 6.5mA) does not exceed power budget constraints

The ASCO-80.000MHZ-L-T3 is an active product with current manufacturing support, providing supply chain continuity. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can the ASCO-80.000MHZ-L-T3 replace the ASCSM-80.000MHZ-LR-T in all applications?

A: Substitution is valid only when the application operates at a fixed 3.3V supply voltage. The main part supports 1.7V to 3.6V operation; systems requiring operation below 3.3V cannot use the substitute without voltage regulation modifications.

Q: What is the impact of the frequency stability difference?

A: The main part specifies ±25ppm stability while the substitute specifies ±50ppm. Applications with tight frequency tolerance requirements must verify that ±50ppm meets system specifications before substitution.

Q: Are the package changes compatible?

A: The main part uses 4-UFBGA/CSPBGA packaging while the substitute uses 4-SMD No Lead packaging. PCB footprints differ and require layout redesign. Pin-to-pin electrical compatibility exists, but physical placement and soldering processes differ.

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

A: The main part uses MEMS (Micro-Electro-Mechanical Systems) resonator technology while the substitute uses a crystal resonator. Both provide equivalent frequency output and CMOS logic levels. MEMS technology typically offers better shock/vibration resistance; crystal technology offers lower cost.

Q: Is the disable current specification important for substitution?

A: The main part specifies 15µA disable current while the substitute does not provide this specification. For applications requiring low standby power consumption, verify the substitute's disable current performance before selection.