ASCSM-11.2896MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASCSM-11.2896MHZ-LR-T is a 11.2896 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 listed as Obsolete, necessitating identification of active alternative components that maintain functional compatibility for new designs or production continuity.

Key Parameters

Parameter	Value
Frequency	11.2896 MHz
Output Type	CMOS
Function	Enable/Disable
Voltage Supply Range	1.7V ~ 3.6V
Frequency Stability	±25ppm
Operating Temperature	-40°C ~ 85°C
Current Supply (Max)	6.5mA
Mounting Type	Surface Mount
Package	4-UFBGA, CSPBGA
Size	0.070" L x 0.049" W (1.79mm x 1.25mm)
Height (Max)	0.027" (0.69mm)
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the ASCSM-11.2896MHZ-LR-T requires matching the following critical parameters:

Frequency: 11.2896 MHz (exact match required)
Output Type: CMOS
Function: Enable/Disable capability
Mounting: Surface Mount
Compliance: ROHS3 Compliant, REACH Unaffected

The identified substitute parts are from Abracon LLC's ASCO series, which utilize crystal-based resonators instead of MEMS technology. Both substitute parts maintain the required frequency, CMOS output, Enable/Disable function, and surface mount configuration. The ASCO series components are Active products, providing production continuity for the obsolete ASCSM part.

Parameter Comparison

Parameter	ASCSM-11.2896MHZ-LR-T (Main)	ASCO-11.2896MHZ-L-T3	ASCO-11.2896MHZ-EK-T3
Frequency	11.2896 MHz	11.2896 MHz	11.2896 MHz
Output Type	CMOS	CMOS	CMOS
Function	Enable/Disable	Enable/Disable	Enable/Disable
Voltage Supply	1.7V ~ 3.6V	3.3V	3.3V
Frequency Stability	±25ppm	±50ppm	±30ppm
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-20°C ~ 70°C
Current Supply (Max)	6.5mA	4.5mA	4.5mA
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package	4-UFBGA, CSPBGA	4-SMD, No Lead	4-SMD, No Lead
Size	0.070" L x 0.049" W (1.79mm x 1.25mm)	0.063" L x 0.047" W (1.60mm x 1.20mm)	0.063" L x 0.047" W (1.60mm x 1.20mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both ASCO series parts provide Active product status, ensuring long-term availability and manufacturing support compared to the Obsolete ASCSM-11.2896MHZ-LR-T. Both substitute parts maintain ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements.

ASCO-11.2896MHZ-L-T3 is suitable for applications where the wider operating temperature range of -40°C to 85°C is required and where the ±50ppm frequency stability is acceptable.

ASCO-11.2896MHZ-EK-T3 offers improved frequency stability at ±30ppm, making it appropriate for applications with tighter frequency tolerance requirements. This part operates within -20°C to 70°C, which may be limiting for extended temperature range applications.

Both substitute parts operate at fixed 3.3V supply voltage, compared to the main part's 1.7V to 3.6V range. Circuit designs must accommodate this fixed voltage specification. Both substitute parts feature reduced maximum supply current (4.5mA versus 6.5mA), providing improved power efficiency.

Frequently Asked Questions (FAQ)

Q: Can ASCO-11.2896MHZ-L-T3 or ASCO-11.2896MHZ-EK-T3 directly replace ASCSM-11.2896MHZ-LR-T?

A: Both ASCO parts maintain the same 11.2896 MHz frequency, CMOS output, and Enable/Disable function. However, the supply voltage is fixed at 3.3V instead of the variable 1.7V to 3.6V range. Verify that your circuit design operates at 3.3V supply voltage. Package dimensions are slightly smaller (1.60mm x 1.20mm versus 1.79mm x 1.25mm), and package type differs (4-SMD, No Lead versus 4-UFBGA, CSPBGA), requiring PCB layout verification.

Q: What is the difference between the two ASCO substitute parts?

A: ASCO-11.2896MHZ-L-T3 operates across -40°C to 85°C with ±50ppm stability. ASCO-11.2896MHZ-EK-T3 operates across -20°C to 70°C with ±30ppm stability. Select based on your application's temperature range and frequency stability requirements.

Q: Are there supply voltage compatibility concerns?

A: Yes. The main part accepts 1.7V to 3.6V, while both ASCO substitutes require exactly 3.3V. If your design uses variable supply voltages within the original range, circuit modification is necessary.

Q: Do the substitute parts have the same package footprint?

A: No. The main part uses 4-UFBGA or CSPBGA packaging, while both ASCO substitutes use 4-SMD, No Lead packaging. PCB layout and assembly process changes are required.

Q: What is the frequency stability difference impact?

A: The main part specifies ±25ppm. ASCO-11.2896MHZ-L-T3 specifies ±50ppm (wider tolerance), while ASCO-11.2896MHZ-EK-T3 specifies ±30ppm (closer to original). Applications with tight frequency tolerance requirements should use ASCO-11.2896MHZ-EK-T3.

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