TC-32.768MBD-T MEMS Oscillator Equivalent & Substitute Parts

Part Overview

The TC-32.768MBD-T is a 32.768 MHz MEMS-based XO (Standard) oscillator manufactured by TXC CORPORATION. This component operates at 3.3V with CMOS output and includes Enable/Disable functionality. The device is packaged in a 4-SMD, No Lead configuration with surface mount mounting type.

The TC-32.768MBD-T has reached Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this oscillator specification.

Substiute Parts

TC-32.768MBD-T

TXC CORPORATIONIn Stock: 1047TC-32.768MBD-T Datasheet

Current PartRFQ

7X-32.768MBD-T

TXC CORPORATIONIn Stock: 10697X-32.768MBD-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TC-32.768MBD-T are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Frequency: 32.768 MHz (exact match required)
• Output Type: CMOS (exact match required)
• Supply Voltage: 3.3V (exact match required)
• Function: Enable/Disable (exact match required)
• Frequency Stability: ±25ppm (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• Package / Case: 4-SMD, No Lead (exact match required)
• Size / Dimension: 0.126" L x 0.098" W (3.20mm x 2.50mm) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Allowable Variations:

• Base Resonator Type: MEMS or Crystal technology
• Current Supply (Max): May vary within operational limits
• Height - Seated (Max): May vary within PCB assembly constraints
• Product Status: Active status preferred for ongoing availability

The 7X-32.768MBD-T qualifies as a substitute part based on matching all critical electrical and mechanical parameters while utilizing Crystal-based resonator technology instead of MEMS.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 7X-32.768MBD-T

The 7X-32.768MBD-T is the recommended substitute for the obsolete TC-32.768MBD-T. This part maintains electrical and mechanical compatibility across all critical parameters including frequency, output type, supply voltage, function, frequency stability, operating temperature range, package configuration, and physical dimensions.

Advantages of the 7X-32.768MBD-T:

• Active product status ensures ongoing availability and supply chain support
• RoHS Compliant certification
• REACH Unaffected status
• Lower maximum supply current (15mA versus 25mA) provides improved power efficiency
• Identical electrical performance specifications

Design Considerations:

• Height difference of 0.012" (0.30mm) between seated positions requires PCB layout verification to ensure clearance in constrained applications
• Crystal-based resonator technology replaces MEMS technology; both technologies deliver equivalent frequency stability and performance at the specified ±25ppm tolerance
• Current supply reduction from 25mA to 15mA may improve overall system power consumption

Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, maintaining regulatory consistency.

Frequently Asked Questions (FAQ)

Q: Can the 7X-32.768MBD-T directly replace the TC-32.768MBD-T without circuit modifications?

A: Yes. The 7X-32.768MBD-T maintains identical electrical specifications (frequency, output type, supply voltage, function, frequency stability, and operating temperature range) and identical package/case configuration. No circuit modifications are required. PCB layout should be verified to accommodate the 0.30mm height difference.

Q: What is the difference between MEMS and Crystal-based oscillators in this application?

A: The TC-32.768MBD-T uses MEMS (Micro-Electro-Mechanical Systems) resonator technology, while the 7X-32.768MBD-T uses Crystal resonator technology. Both deliver the same frequency stability (±25ppm) and operating characteristics for this 32.768 MHz application. The choice between technologies does not affect functional compatibility.

Q: Why is the current supply specification different between these parts?

A: The TC-32.768MBD-T specifies a maximum supply current of 25mA, while the 7X-32.768MBD-T specifies 15mA. This difference reflects the efficiency characteristics of the respective resonator technologies and internal circuit design. The lower current requirement of the 7X-32.768MBD-T may reduce overall system power consumption.

Q: Are there any compliance or regulatory differences between these parts?

A: The 7X-32.768MBD-T carries RoHS Compliant and REACH Unaffected certifications. Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. Verify compliance requirements for your specific application and region.

Q: What is the significance of the height difference (0.031" versus 0.043")?

A: The seated height difference of 0.012" (0.30mm) is within typical PCB assembly tolerances. Verify that your PCB layout and any overlying components provide adequate clearance. This difference does not affect electrical performance or functional compatibility.

Q: Is the 7X-32.768MBD-T suitable for new designs?

A: Yes. The 7X-32.768MBD-T is an Active product with ongoing manufacturer support, making it suitable for both replacement applications and new design implementations requiring a 32.768 MHz CMOS oscillator with Enable/Disable functionality at 3.3V supply voltage.