ASCSM-11.0592MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASCSM-11.0592MHZ-LR-T is an 11.0592 MHz MEMS-based XO (Standard) CMOS oscillator manufactured by Abracon LLC. This component operates across a wide supply voltage range of 1.7V to 3.6V with Enable/Disable functionality, housed in a compact 4-UFBGA/CSPBGA package. The product is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs requiring this frequency specification.

Key Parameters

Parameter	Value
Frequency	11.0592 MHz
Output Type	CMOS
Supply Voltage Range	1.7V ~ 3.6V
Frequency Stability	±25ppm
Operating Temperature	-40°C ~ 85°C
Function	Enable/Disable
Package Type	4-UFBGA, CSPBGA
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

The ASCO-11.0592MHZ-L-T3 is identified as a direct substitute based on the following critical parameters:

Frequency match: Both parts operate at 11.0592 MHz, ensuring direct functional compatibility in frequency-dependent applications.

Output configuration: Both deliver CMOS-level output signals.

Enable/Disable function: Both incorporate enable/disable control capability.

Operating temperature range: Both support -40°C to 85°C operation, maintaining thermal compatibility.

RoHS3 compliance: Both meet the same environmental and regulatory standards.

Surface mount technology: Both use surface mount packaging suitable for automated assembly.

Substitution constraints: The ASCO variant operates at a fixed 3.3V supply voltage, whereas the original ASCSM supports 1.7V to 3.6V. The ASCO exhibits ±50ppm frequency stability compared to the ASCSM's ±25ppm specification. Package geometry differs slightly, requiring PCB layout verification. The ASCO is currently active in production, ensuring long-term availability.

Parameter Comparison

Parameter	ASCSM-11.0592MHZ-LR-T (Original)	ASCO-11.0592MHZ-L-T3 (Substitute)
Manufacturer	Abracon LLC	Abracon LLC
Frequency	11.0592 MHz	11.0592 MHz
Output Type	CMOS	CMOS
Supply Voltage	1.7V ~ 3.6V	3.3V
Frequency Stability	±25ppm	±50ppm
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Function	Enable/Disable	Enable/Disable
Current - Supply (Max)	6.5mA	4.5mA
Package / Case	4-UFBGA, CSPBGA	4-SMD, No Lead
Size / Dimension	0.070" L x 0.049" W (1.79mm x 1.25mm)	0.063" L x 0.047" W (1.60mm x 1.20mm)
Height - Seated (Max)	0.027" (0.69mm)	0.028" (0.70mm)
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The ASCO-11.0592MHZ-L-T3 is suitable as a substitute when the following conditions are met:

System supply voltage is fixed at 3.3V or can be adapted to 3.3V operation. The original ASCSM's wide voltage range (1.7V to 3.6V) is not a design requirement.

Frequency stability of ±50ppm is acceptable for the application. Applications requiring the tighter ±25ppm specification of the original part require alternative sourcing.

PCB layout can accommodate the slightly smaller package dimensions (1.60mm x 1.20mm versus 1.79mm x 1.25mm) and the transition from UFBGA/CSPBGA to 4-SMD, No Lead packaging.

The active product status of the ASCO variant ensures continued availability and manufacturing support, eliminating obsolescence risk associated with the original ASCSM part.

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the ASCO-11.0592MHZ-L-T3 directly replace the ASCSM-11.0592MHZ-LR-T without PCB modifications?

A: Package geometry differs between the two parts. The ASCO uses 4-SMD, No Lead packaging versus the ASCSM's 4-UFBGA/CSPBGA. PCB footprint verification and potential layout adjustments are necessary.

Q: What is the impact of the ±50ppm frequency stability in the ASCO compared to the ±25ppm in the ASCSM?

A: The ASCO exhibits twice the frequency tolerance. Applications with strict frequency accuracy requirements must evaluate whether ±50ppm meets system specifications.

Q: Is the 3.3V fixed supply voltage of the ASCO compatible with systems designed for the ASCSM's 1.7V to 3.6V range?

A: The ASCO operates only at 3.3V. Systems requiring operation below 3.3V or with variable supply voltages cannot use this substitute without circuit redesign.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the ASCSM and ASCO operate across -40°C to 85°C, ensuring thermal compatibility.

Q: What is the significance of the ASCSM being obsolete and the ASCO being active?

A: The active status of the ASCO ensures ongoing manufacturing, inventory availability, and technical support. The obsolete status of the ASCSM limits future sourcing options.

Q: Do both parts support Enable/Disable functionality?

A: Yes. Both the ASCSM and ASCO incorporate Enable/Disable control capability.

Q: Are there differences in current consumption between these parts?

A: The ASCO draws a maximum of 4.5mA compared to the ASCSM's 6.5mA, representing improved power efficiency in the substitute part.

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