ASCSM-12.352MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASCSM-12.352MHZ-LR-T is a 12.352 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 classified as Obsolete, necessitating identification of suitable substitute components for ongoing production and maintenance applications. Equivalent parts must maintain the 12.352 MHz frequency specification and CMOS output characteristics while accommodating the electrical and mechanical constraints of the target application.

Substiute Parts

ASCSM-12.352MHZ-LR-T

Abracon LLCIn Stock: 1068ASCSM-12.352MHZ-LR-T Datasheet

Current PartRFQ

ASCO-12.352MHZ-L-T3

Abracon LLCIn Stock: 878ASCO-12.352MHZ-L-T3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASCSM-12.352MHZ-LR-T is determined by the following critical parameters:

• Frequency Match: 12.352 MHz (exact)
• Output Configuration: CMOS output with Enable/Disable capability
• Operating Temperature Range: -40°C to 85°C minimum
• RoHS Compliance: ROHS3 Compliant
• Supply Voltage Compatibility: Must operate within or encompass the 1.7V ~ 3.6V range

The substitute part ASCO-12.352MHZ-L-T3 maintains the core frequency and output type specifications. However, the supply voltage is fixed at 3.3V (narrower than the original 1.7V ~ 3.6V range), and frequency stability is ±50ppm (less stringent than ±25ppm). These differences must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ASCO-12.352MHZ-L-T3 is an active product suitable for replacing the obsolete ASCSM-12.352MHZ-LR-T in applications where the following conditions are met:

• The circuit design operates at a fixed 3.3V supply voltage, or the application can tolerate the narrower voltage range
• Frequency stability of ±50ppm is acceptable for the intended function
• The package transition from 4-UFBGA/CSPBGA to 4-SMD No Lead is compatible with PCB layout and assembly capabilities
• Both parts maintain ROHS3 compliance and identical operating temperature specifications

The substitute part offers lower maximum supply current (4.5mA versus 6.5mA), which may provide power consumption benefits in battery-operated applications. Physical dimensions are comparable, with the substitute part being slightly smaller.

Frequently Asked Questions (FAQ)

Q: Can the ASCO-12.352MHZ-L-T3 replace the ASCSM-12.352MHZ-LR-T in all applications?

A: No. The substitute part operates at a fixed 3.3V supply voltage, whereas the original part supports 1.7V to 3.6V. Substitution is valid only if your circuit design operates at 3.3V or can be modified to do so.

Q: What is the impact of the ±50ppm frequency stability versus ±25ppm?

A: The substitute part has twice the frequency tolerance. Applications with tight frequency requirements or those sensitive to clock drift must evaluate whether ±50ppm meets system specifications.

Q: Are the package types interchangeable?

A: No. The original uses 4-UFBGA/CSPBGA packaging, while the substitute uses 4-SMD No Lead. PCB footprints and assembly processes differ. Layout and manufacturing compatibility must be confirmed before substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 Compliant, REACH Unaffected, and classified under ECCN EAR99 with identical HTSUS codes.

Q: What is the base resonator difference between these parts?

A: The original ASCSM uses MEMS technology, while the substitute ASCO uses a crystal resonator. Both deliver the same frequency output and CMOS characteristics required for the application.