ASCSM-20.000MHZ-LY-T Equivalent & Substitute Parts

Part Overview

The ASCSM-20.000MHZ-LY-T is a 20 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-20.000MHZ-LY-T has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this oscillator.

Substiute Parts

ASCSM-20.000MHZ-LY-T

Abracon LLCIn Stock: 1010ASCSM-20.000MHZ-LY-T Datasheet

Current PartRFQ

ASCO-20.000MHZ-L-T3

Abracon LLCIn Stock: 1037ASCO-20.000MHZ-L-T3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASCSM-20.000MHZ-LY-T is evaluated based on the following critical parameters:

Frequency Match: 20 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 Range: The main part operates at 1.7V ~ 3.6V. Substitute parts must support the application's required voltage range within this specification or narrower ranges that encompass the design operating point.

Frequency Stability: The main part specifies ±10ppm. Substitute parts with equal or tighter stability are acceptable.

Package Compatibility: Surface mount packages with compatible footprints and height profiles are acceptable.

Compliance & Status: Active product status with current RoHS3 and REACH compliance ensures ongoing availability and regulatory alignment.

The ASCO-20.000MHZ-L-T3 meets the core functional requirements of frequency, output type, function, and operating temperature. However, the substitute part operates at a fixed 3.3V supply voltage (narrower than the main part's 1.7V ~ 3.6V range) and exhibits reduced frequency stability (±50ppm versus ±10ppm). These differences must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ASCO-20.000MHZ-L-T3 is an active product with current RoHS3 and REACH compliance, providing supply chain continuity for the obsolete ASCSM-20.000MHZ-LY-T.

Voltage Supply Consideration: The substitute part operates at a fixed 3.3V supply. Applications requiring operation below 3.3V or across the full 1.7V ~ 3.6V range of the main part cannot use this substitute without design modification.

Frequency Stability Consideration: The substitute part specifies ±50ppm frequency stability compared to the main part's ±10ppm. Applications with tight frequency tolerance requirements must evaluate whether this reduced stability is acceptable.

Package Consideration: The substitute uses a 4-SMD, No Lead package versus the main part's 4-UFBGA, CSPBGA package. PCB layout and footprint compatibility must be verified before implementation.

Current Consumption: The substitute part draws 4.5mA maximum supply current, which is lower than the main part's 6.5mA, providing a potential power consumption benefit.

Selection of the ASCO-20.000MHZ-L-T3 is appropriate when the application operates at 3.3V supply voltage, can tolerate ±50ppm frequency stability, and the 4-SMD package footprint is compatible with the PCB design.

Frequently Asked Questions (FAQ)

Q: Can the ASCO-20.000MHZ-L-T3 replace the ASCSM-20.000MHZ-LY-T in all applications?

A: No. The substitute part operates at a fixed 3.3V supply voltage, whereas the main part supports 1.7V ~ 3.6V. Applications requiring operation outside the 3.3V point or across a wider voltage range require design modification or alternative parts.

Q: What is the impact of the frequency stability difference between ±10ppm and ±50ppm?

A: Frequency stability determines the oscillator's frequency accuracy over temperature and time. Applications with strict frequency tolerance requirements (such as precision timing or communication protocols) may not accept the reduced stability of the substitute part. Verify application specifications before substitution.

Q: Are the package dimensions compatible between the two parts?

A: The main part uses a 4-UFBGA, CSPBGA package (1.79mm × 1.25mm × 0.69mm), while the substitute uses a 4-SMD, No Lead package (1.60mm × 1.20mm × 0.70mm). Although dimensions are similar, the package types differ. PCB footprint and layout compatibility must be verified with the specific package datasheets.

Q: Does the substitute part have the same Enable/Disable functionality?

A: Yes. Both parts feature Enable/Disable function for power management control.

Q: Are both parts RoHS3 and REACH compliant?

A: Yes. Both the main part and substitute part are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: What is the product status difference, and why does it matter?

A: The main part (ASCSM-20.000MHZ-LY-T) is Obsolete, meaning it is no longer manufactured and inventory is limited. The substitute part (ASCO-20.000MHZ-L-T3) is Active, ensuring ongoing availability and manufacturer support for new designs and production runs.