ASCSM-16.384MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASCSM-16.384MHZ-LR-T is a MEMS-based XO (Standard) oscillator manufactured by Abracon LLC, operating at 16.384 MHz with CMOS output. This component features a wide supply voltage range of 1.7V to 3.6V, making it suitable for low-power and battery-operated applications. The oscillator includes enable/disable functionality and is housed in a compact 4-UFBGA/CSPBGA package measuring 1.79mm × 1.25mm.

The ASCSM-16.384MHZ-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 applications utilizing this frequency and package specification.

Substiute Parts

ASCSM-16.384MHZ-LR-T

Abracon LLCIn Stock: 1130ASCSM-16.384MHZ-LR-T Datasheet

Current PartRFQ

ASCO-16.384MHZ-L-T3

Abracon LLCIn Stock: 868ASCO-16.384MHZ-L-T3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ASCSM-16.384MHZ-LR-T must satisfy the following core electrical and mechanical criteria:

Mandatory Matching Parameters:

• Frequency: 16.384 MHz
• Output Type: CMOS
• Function: Enable/Disable
• Operating Temperature Range: -40°C ~ 85°C
• RoHS3 Compliance

Allowable Variations:

• Supply Voltage: The substitute ASCO-16.384MHZ-L-T3 operates at 3.3V (fixed), which is within the original part's 1.7V ~ 3.6V range. This represents a narrower but compatible voltage specification.
• Frequency Stability: The substitute specifies ±50ppm versus the original ±25ppm. This represents a relaxed tolerance that may be acceptable depending on application requirements.
• Base Resonator: The substitute uses a crystal-based resonator instead of MEMS. Both technologies deliver the required frequency and stability within specified tolerances.
• Package Type: The substitute uses 4-SMD, No Lead packaging versus the original 4-UFBGA/CSPBGA. Both are surface-mount packages with comparable footprints and heights.
• Current Consumption: The substitute draws 4.5mA maximum versus 6.5mA for the original, representing improved efficiency.

Parameter Comparison

Engineering Selection Recommendations

The ASCO-16.384MHZ-L-T3 is an active, in-stock substitute for the obsolete ASCSM-16.384MHZ-LR-T. Both components are manufactured by Abracon LLC and maintain ROHS3 compliance and EAR99 export classification.

Compatibility Assessment:

The substitute part maintains electrical equivalence for the 16.384 MHz frequency, CMOS output, enable/disable function, and -40°C to 85°C operating temperature range. The fixed 3.3V supply voltage is compatible with applications designed for the original part's 1.7V ~ 3.6V range, provided the circuit operates at 3.3V.

The relaxed frequency stability specification (±50ppm versus ±25ppm) and crystal-based resonator technology represent functional trade-offs. These differences are acceptable for applications where the original ±25ppm specification was not a critical design constraint.

The substitute package (4-SMD, No Lead) differs from the original (4-UFBGA/CSPBGA) but maintains comparable physical dimensions and surface-mount compatibility. PCB layout and footprint modifications may be required.

The improved current consumption (4.5mA versus 6.5mA) provides a performance advantage for power-sensitive applications.

Frequently Asked Questions (FAQ)

Q: Can the ASCO-16.384MHZ-L-T3 directly replace the ASCSM-16.384MHZ-LR-T without circuit modifications?

A: Direct replacement depends on circuit design. The substitute operates at a fixed 3.3V supply voltage, whereas the original supports 1.7V to 3.6V. If your circuit operates at 3.3V, electrical compatibility is maintained. PCB footprint changes are required due to different package types (4-SMD, No Lead versus 4-UFBGA/CSPBGA).

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

A: Frequency stability tolerance determines long-term frequency accuracy. The substitute's ±50ppm specification is twice as relaxed as the original. This is acceptable for applications where timing precision is not critical. Applications requiring ±25ppm accuracy must evaluate whether ±50ppm meets functional requirements.

Q: Are both parts RoHS compliant?

A: Yes. Both the ASCSM-16.384MHZ-LR-T and ASCO-16.384MHZ-L-T3 are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements.

Q: What are the package differences, and do they affect PCB design?

A: The original uses 4-UFBGA/CSPBGA packaging (1.79mm × 1.25mm, 0.69mm height). The substitute uses 4-SMD, No Lead packaging (1.60mm × 1.20mm, 0.70mm height). Both are surface-mount packages with similar footprints, but PCB layout and solder pad geometry require redesign to accommodate the different package type.

Q: Is the substitute part currently available?

A: Yes. The ASCO-16.384MHZ-L-T3 has active product status with 788 pieces in stock, ensuring supply chain availability compared to the obsolete original part.

Q: Does the substitute support the same disable current specification?

A: The original part specifies 15µA maximum disable current. The substitute's disable current specification is not provided in available documentation. Verify disable current performance against application requirements before final selection.