TA-1.544MBD-T MEMS Oscillator Equivalent & Substitute Parts

Part Overview

The TA-1.544MBD-T is a 1.544 MHz MEMS-based XO (Standard) oscillator manufactured by TXC CORPORATION. This component operates at 3.3V with CMOS output, Enable/Disable function, and is housed in a 4-SMD, No Lead package. The part is currently classified as Obsolete, making identification of equivalent and substitute components essential for ongoing system support and procurement planning. Substitute parts must maintain functional compatibility across frequency, output type, supply voltage, operating temperature range, and physical package dimensions.

Substiute Parts

TA-1.544MBD-T

TXC CORPORATIONIn Stock: 985TA-1.544MBD-T Datasheet

Current PartRFQ

510CBA1M54400AAGR

Skyworks Solutions Inc.In Stock: 805510CBA1M54400AAGR Datasheet

DirectRFQ

SG-8018CA 1.5440M-TJHSA0

EPSONIn Stock: 892SG-8018CA 1.5440M-TJHSA0 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TA-1.544MBD-T are qualified based on the following critical parameters:

Mandatory Compatibility Criteria:

• Frequency: 1.544 MHz (exact match required)
• Output: CMOS (required for signal compatibility)
• Function: Enable/Disable (required for control compatibility)
• Package: 4-SMD, No Lead with 7.00mm x 5.00mm footprint (required for PCB layout compatibility)
• Mounting: Surface Mount (required for assembly process compatibility)
• Moisture Sensitivity Level: 1 (Unlimited) (required for storage and handling compatibility)

Acceptable Parameter Variations:

• Supply Voltage: Substitute must support 3.3V operation; wider voltage ranges are acceptable
• Frequency Stability: Substitute must meet or exceed ±25ppm specification
• Operating Temperature: Substitute must support minimum -40°C ~ 85°C range; extended ranges are acceptable
• Supply Current: Substitute maximum current may vary; lower values are preferred for power efficiency
• Base Resonator: Both MEMS and Crystal resonator types are functionally equivalent at this frequency and stability specification

The two substitute parts listed below meet all mandatory compatibility criteria and are qualified for direct replacement in applications using the TA-1.544MBD-T.

Parameter Comparison

Engineering Selection Recommendations

510CBA1M54400AAGR (Skyworks Solutions Inc.)

This substitute part is classified as Active product status and provides direct functional equivalence to the TA-1.544MBD-T. The 510CBA1M54400AAGR maintains identical frequency (1.544 MHz), output type (CMOS), supply voltage (3.3V), frequency stability (±25ppm), and operating temperature range (-40°C ~ 85°C). The maximum supply current specification of 26mA is marginally higher than the main part at 25mA. The package footprint and dimensions are identical. This part is suitable for applications requiring direct replacement with minimal design modification.

SG-8018CA 1.5440M-TJHSA0 (EPSON)

This substitute part is classified as Active product status and provides functional equivalence with extended operating specifications. The SG-8018CA 1.5440M-TJHSA0 maintains identical frequency (1.544 MHz), output type (CMOS), and Enable/Disable function. The supply voltage range (1.62V ~ 3.63V) encompasses the 3.3V requirement of the main part. The operating temperature range extends to 105°C, exceeding the main part specification of 85°C. The frequency stability specification of ±50ppm is wider than the main part at ±25ppm. The maximum supply current is significantly lower at 8.1mA compared to 25mA, providing improved power efficiency. The package footprint is identical; however, the maximum seated height is 1.30mm compared to 1.00mm for the main part. This part is suitable for applications where extended temperature operation or reduced power consumption is beneficial, provided PCB clearance accommodates the increased height.

Both substitute parts carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications as the main part. The SG-8018CA 1.5440M-TJHSA0 includes RoHS3 compliance and REACH Unaffected status documentation.

Frequently Asked Questions (FAQ)

Q: Can the 510CBA1M54400AAGR be used as a direct replacement for the TA-1.544MBD-T without PCB modifications?

A: Yes. The 510CBA1M54400AAGR maintains identical package footprint (7.00mm x 5.00mm), mounting type (Surface Mount, 4-SMD No Lead), frequency (1.544 MHz), output type (CMOS), supply voltage (3.3V), and operating temperature range (-40°C ~ 85°C). The maximum seated height of 1.80mm is higher than the main part's 1.00mm; verify PCB clearance in the component mounting area.

Q: What is the key difference between the 510CBA1M54400AAGR and SG-8018CA 1.5440M-TJHSA0?

A: Both parts are functionally equivalent for the 1.544 MHz CMOS oscillator application. The 510CBA1M54400AAGR matches the main part's frequency stability (±25ppm) and operating temperature range (-40°C ~ 85°C). The SG-8018CA 1.5440M-TJHSA0 offers extended operating temperature (-40°C ~ 105°C), wider supply voltage range (1.62V ~ 3.63V), and significantly lower supply current (8.1mA vs. 25mA), but has wider frequency stability (±50ppm) and greater seated height (1.30mm).

Q: Is the frequency stability difference between ±25ppm and ±50ppm significant for my application?

A: Frequency stability tolerance depends on application requirements. The ±25ppm specification of the TA-1.544MBD-T and 510CBA1M54400AAGR provides tighter frequency control than the ±50ppm specification of the SG-8018CA 1.5440M-TJHSA0. Applications requiring precise frequency adherence should use parts with ±25ppm or better stability.

Q: Can the SG-8018CA 1.5440M-TJHSA0 operate at voltages below 3.3V?

A: Yes. The SG-8018CA 1.5440M-TJHSA0 supply voltage range is 1.62V ~ 3.63V, which encompasses operation at voltages lower than 3.3V. The TA-1.544MBD-T and 510CBA1M54400AAGR are specified for 3.3V operation only.

Q: Are all three parts compatible with the same PCB layout?

A: The package footprint (7.00mm x 5.00mm, 4-SMD No Lead) is identical for all three parts, making them compatible with the same PCB pad layout. However, verify component clearance for the seated height: TA-1.544MBD-T (1.00mm), 510CBA1M54400AAGR (1.80mm), and SG-8018CA 1.5440M-TJHSA0 (1.30mm).

Q: What is the significance of the Moisture Sensitivity Level 1 (Unlimited) rating?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. All three parts carry this rating, meaning they do not require special moisture-controlled storage or handling procedures.

Q: Do all substitute parts carry the same export classification?

A: Yes. All three parts carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, indicating equivalent export control and tariff treatment.