ASCSM-5.000MHZ-LY-T Equivalent & Substitute Parts

Part Overview

The ASCSM-5.000MHZ-LY-T is a 5 MHz MEMS-based XO (Standard) CMOS oscillator manufactured by Abracon LLC, designed for applications requiring low-voltage operation across 1.7V to 3.6V supply ranges with enable/disable functionality. This component features Pure Silicon™ resonator technology in a compact 4-UFBGA/CSPBGA package with ultra-low moisture sensitivity (MSL 1).

The ASCSM-5.000MHZ-LY-T has reached obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems currently utilizing this oscillator.

Key Parameters

Parameter	Value
Frequency	5 MHz
Base Resonator Type	MEMS (Pure Silicon™)
Output Type	CMOS
Supply Voltage Range	1.7V ~ 3.6V
Function	Enable/Disable
Frequency Stability	±10ppm
Operating Temperature	-40°C ~ 85°C
Package Type	4-UFBGA, CSPBGA
Package Dimensions	0.070" L x 0.049" W (1.79mm x 1.25mm)
Maximum Height	0.027" (0.69mm)
Maximum Supply Current	6.5mA
Disable Mode Current	15µA
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the ASCSM-5.000MHZ-LY-T is determined by the following critical parameters:

Mandatory Matching Parameters:

Frequency: 5 MHz (exact match required)
Output Type: CMOS
Function: Enable/Disable capability
Package Type: Surface mount, compatible pinout and footprint
RoHS Compliance: ROHS3 Compliant

Allowable Variation Parameters:

Supply Voltage Range: Substitute must operate within or be compatible with system voltage requirements
Frequency Stability: Substitute stability must meet or exceed application timing requirements
Operating Temperature: Substitute range must cover or exceed application operating conditions
Supply Current: Substitute current consumption must be acceptable for power budget constraints
Resonator Type: Crystal or MEMS resonators are both acceptable if other parameters align

The ASCO2-5.000MHZ-EK-T3 qualifies as a substitute based on matching frequency, CMOS output, enable/disable function, surface mount packaging, and ROHS3 compliance. Differences in resonator technology (crystal vs. MEMS), supply voltage range, frequency stability, and operating temperature represent trade-offs that must be evaluated against specific application requirements.

Parameter Comparison

Parameter	ASCSM-5.000MHZ-LY-T (Main)	ASCO2-5.000MHZ-EK-T3 (Substitute)
Manufacturer	Abracon LLC	Abracon LLC
Frequency	5 MHz	5 MHz
Base Resonator	MEMS (Pure Silicon™)	Crystal
Output Type	CMOS	CMOS
Function	Enable/Disable	Enable/Disable
Supply Voltage Range	1.7V ~ 3.6V	1.8V
Frequency Stability	±10ppm	±30ppm
Operating Temperature	-40°C ~ 85°C	-20°C ~ 70°C
Maximum Supply Current	6.5mA	3mA
Disable Mode Current	15µA	Not specified
Package Type	4-UFBGA, CSPBGA	4-SMD, No Lead
Package Dimensions	0.070" L x 0.049" W (1.79mm x 1.25mm)	0.063" L x 0.047" W (1.60mm x 1.20mm)
Maximum Height	0.027" (0.69mm)	0.028" (0.70mm)
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)	Not Applicable

Engineering Selection Recommendations

The ASCO2-5.000MHZ-EK-T3 is available as an active product from Abracon LLC, providing supply chain continuity for the obsolete ASCSM-5.000MHZ-LY-T. Both components maintain ROHS3 compliance and EAR99 export classification, supporting regulatory and compliance requirements.

Selection of the ASCO2-5.000MHZ-EK-T3 requires verification that the following parameter differences are acceptable for the target application:

Supply voltage must be compatible with 1.8V fixed specification (versus 1.7V–3.6V range of original)
Frequency stability of ±30ppm must satisfy timing accuracy requirements (original provides ±10ppm)
Operating temperature range of -20°C to 70°C must cover application environment (original supports -40°C to 85°C)
Package footprint change from 4-UFBGA/CSPBGA to 4-SMD No Lead requires PCB layout modification
Crystal resonator technology replaces MEMS technology, affecting shock/vibration performance characteristics

Frequently Asked Questions (FAQ)

Q: Can the ASCO2-5.000MHZ-EK-T3 directly replace the ASCSM-5.000MHZ-LY-T without PCB modification?

A: No. The package types differ (4-UFBGA/CSPBGA versus 4-SMD No Lead), requiring PCB footprint redesign and revalidation. Pin assignments must be verified for functional compatibility.

Q: What is the impact of the frequency stability difference (±10ppm vs. ±30ppm)?

A: The substitute exhibits three times greater frequency tolerance. Applications with strict timing requirements must confirm that ±30ppm stability remains within acceptable limits for the system design.

Q: Is the ASCO2-5.000MHZ-EK-T3 suitable for applications requiring -40°C operation?

A: No. The substitute operates only to -20°C minimum. Applications requiring -40°C operation must identify alternative components or implement thermal management strategies.

Q: Does the supply voltage difference affect circuit design?

A: The substitute requires fixed 1.8V supply versus the original's 1.7V–3.6V range. Designs utilizing the full voltage range of the original must be re-evaluated or alternative components identified.

Q: What are the advantages of the ASCO2-5.000MHZ-EK-T3 over the original?

A: The substitute offers active product status (ensuring long-term availability), lower supply current (3mA versus 6.5mA), and comparable package height (0.70mm versus 0.69mm).

Q: Are both components suitable for high-reliability applications?

A: Both components carry ROHS3 compliance and MSL ratings appropriate for surface mount assembly. The original's MSL 1 (unlimited) provides superior moisture tolerance compared to the substitute's not-applicable rating.

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