ASCSM-14.7456MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASCSM-14.7456MHZ-LR-T is a 14.7456 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-14.7456MHZ-LR-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 utilizing this oscillator frequency and functional specification.

Substiute Parts

ASCSM-14.7456MHZ-LR-T

Abracon LLCIn Stock: 1099ASCSM-14.7456MHZ-LR-T Datasheet

Current PartRFQ

ASCO-14.7456MHZ-L-T3

Abracon LLCIn Stock: 1058ASCO-14.7456MHZ-L-T3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ASCSM-14.7456MHZ-LR-T must satisfy the following criteria:

Mandatory Matching Parameters:

• Frequency: 14.7456 MHz
• Output Type: CMOS
• Function: Enable/Disable
• Operating Temperature Range: -40°C ~ 85°C
• RoHS3 Compliance

Allowable Variations:

• Base Resonator Type: Crystal-based oscillators are acceptable substitutes for MEMS-based oscillators when frequency and output specifications match
• Voltage Supply Range: Substitute parts may operate at fixed voltage levels (such as 3.3V) provided the voltage is within or compatible with the main part's operating range
• Frequency Stability: Substitute parts may have relaxed stability specifications (±50ppm vs. ±25ppm) depending on application requirements
• Package Type: Substitute parts may use alternative surface-mount packages (4-SMD, No Lead) provided mechanical dimensions remain compatible with PCB layout constraints
• Current Consumption: Variations in supply current are acceptable provided they do not exceed system power budgets

Parameter Comparison

Engineering Selection Recommendations

The ASCO-14.7456MHZ-L-T3 is a direct functional substitute for the obsolete ASCSM-14.7456MHZ-LR-T. Both components are manufactured by Abracon LLC and maintain identical frequency, output type, function, and operating temperature specifications.

The ASCO-14.7456MHZ-L-T3 is currently in Active product status, ensuring ongoing availability and supply chain support. Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements.

Key considerations for substitution:

The ASCO-14.7456MHZ-L-T3 operates at a fixed 3.3V supply voltage, which is within the main part's 1.7V to 3.6V range. Applications requiring operation below 3.3V must verify compatibility with system power architecture.

Frequency stability differs between the parts: the substitute specifies ±50ppm versus the main part's ±25ppm. Applications with stringent frequency accuracy requirements must evaluate whether this relaxed specification is acceptable.

The substitute uses a crystal-based resonator instead of MEMS technology. Both resonator types deliver equivalent frequency performance at the specified operating conditions.

Package geometry is comparable: the substitute measures 1.60mm × 1.20mm versus the main part's 1.79mm × 1.25mm, with heights within 0.01mm of each other. PCB layout modifications may be minimal or unnecessary.

Current consumption is lower in the substitute (4.5mA maximum versus 6.5mA), providing potential power efficiency improvements.

Frequently Asked Questions (FAQ)

Q: Can the ASCO-14.7456MHZ-L-T3 directly replace the ASCSM-14.7456MHZ-LR-T without PCB modifications?

A: The substitute part has compatible dimensions and identical electrical specifications for frequency, output type, and function. However, package type differs (4-SMD, No Lead versus 4-UFBGA/CSPBGA), which may require PCB footprint verification. Consult PCB layout documentation to confirm pad compatibility.

Q: What is the impact of the ±50ppm frequency stability specification on system performance?

A: Frequency stability tolerance depends on application requirements. The substitute's ±50ppm specification is twice the main part's ±25ppm. Applications with timing-critical functions, communication protocols, or precision measurement requirements must evaluate whether this relaxed tolerance meets performance criteria.

Q: Is the 3.3V fixed supply voltage compatible with my design?

A: The substitute operates at 3.3V, which falls within the main part's 1.7V to 3.6V range. If your system uses 3.3V supply rails, the substitute is directly compatible. Systems operating at lower voltages (below 3.0V) must verify that 3.3V operation is acceptable for the application.

Q: What are the differences between MEMS and crystal-based oscillators?

A: Both technologies deliver equivalent frequency performance at the specified operating conditions. MEMS oscillators typically offer smaller size and lower power consumption, while crystal oscillators provide established reliability in legacy applications. For this 14.7456 MHz specification, both resonator types are functionally equivalent.

Q: Are there any compliance or certification differences between the two parts?

A: Both parts are ROHS3 compliant and REACH Unaffected. Regulatory compliance is equivalent, and both parts satisfy environmental and hazardous substance requirements.

Q: What is the current consumption difference, and does it matter?

A: The substitute draws 4.5mA maximum versus the main part's 6.5mA. This 2mA reduction may provide measurable power savings in battery-powered or power-constrained applications. For line-powered systems, the difference is typically negligible.