TC-18.432MBE-T MEMS Oscillator Equivalent & Substitute Parts

Part Overview

The TC-18.432MBE-T is a 18.432 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 surface mount package. The part is currently classified as Obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and field replacement applications.

Substiute Parts

TC-18.432MBE-T

TXC CORPORATIONIn Stock: 1169TC-18.432MBE-T Datasheet

Current PartRFQ

7X-18.432MBE-T

TXC CORPORATIONIn Stock: 7527X-18.432MBE-T Datasheet

DirectRFQ

7X18400002

TXC CORPORATIONIn Stock: 10737X18400002 Datasheet

DirectRFQ

ASE-18.432MHZ-L-C-T

Abracon LLCIn Stock: 1355ASE-18.432MHZ-L-C-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC-18.432MBE-T is determined by strict alignment of the following parameters:

Critical Matching Parameters:

• Frequency: 18.432 MHz (exact match required)
• Output Type: CMOS
• Supply Voltage: 3.3V
• Function: Enable/Disable
• Frequency Stability: ±50ppm
• Operating Temperature Range: -40°C ~ 85°C
• Package Type: 4-SMD, No Lead
• Physical Dimensions: 0.126" L x 0.098" W (3.20mm x 2.50mm)
• Moisture Sensitivity Level: 1 (Unlimited)

All three substitute parts meet these critical parameters. Differences in base resonator technology (MEMS versus Crystal), current consumption specifications, and product status are secondary considerations that do not prevent functional substitution within the defined electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status):

The three substitute parts—7X-18.432MBE-T, 7X18400002, and ASE-18.432MHZ-L-C-T—are all classified as Active products and meet all critical electrical and mechanical parameters required for direct substitution of the obsolete TC-18.432MBE-T.

TXC CORPORATION 7X Series (7X-18.432MBE-T and 7X18400002): Both parts are manufactured by the original equipment manufacturer and maintain identical electrical specifications. The 7X-18.432MBE-T specifies 20mA maximum supply current, while 7X18400002 does not specify this parameter. Both parts carry RoHS Compliant and REACH Unaffected certifications. The 7X series uses crystal-based resonators rather than MEMS technology. Height difference (0.043" versus 0.031" for the main part) must be evaluated for PCB layout clearance in space-constrained applications.

Abracon LLC ASE Series (ASE-18.432MHZ-L-C-T): This part offers the lowest maximum supply current specification at 7mA and includes a Current - Supply (Disable) specification of 10µA. The ASE series carries ROHS3 Compliant and REACH Unaffected certifications. Packaging is specified as Tape & Reel (TR). Height is 0.047" (1.20mm), representing the maximum seated height among all options. This part is suitable for applications prioritizing power consumption efficiency.

Compliance Considerations: All substitute parts maintain MSL 1 (Unlimited) moisture sensitivity rating. The TXC 7X series and Abracon ASE series all carry current environmental compliance certifications (RoHS and REACH), whereas the main part does not specify these certifications.

Frequently Asked Questions (FAQ)

Q: Can the TC-18.432MBE-T be directly replaced with any of the three substitute parts?

A: Yes. All three substitute parts meet the critical electrical parameters: 18.432 MHz frequency, CMOS output, 3.3V supply, Enable/Disable function, ±50ppm frequency stability, -40°C ~ 85°C operating temperature, and 4-SMD No Lead package with 3.20mm x 2.50mm footprint. Functional substitution is supported within these constraints.

Q: What is the primary difference between the TC-18.432MBE-T and the 7X series substitutes?

A: The main part uses MEMS-based resonator technology, while the 7X series (7X-18.432MBE-T and 7X18400002) use crystal-based resonators. Both technologies deliver identical electrical performance within the specified parameters. The 7X series parts are manufactured by the same original equipment manufacturer (TXC CORPORATION) and are classified as Active products.

Q: Are there height clearance concerns when substituting these parts?

A: Yes. The TC-18.432MBE-T has a maximum seated height of 0.031" (0.80mm). The 7X-18.432MBE-T and 7X18400002 are 0.043" (1.10mm), and the ASE-18.432MHZ-L-C-T is 0.047" (1.20mm). PCB layout and component placement clearance must be verified for applications with height restrictions.

Q: Which substitute part offers the lowest power consumption?

A: The ASE-18.432MHZ-L-C-T specifies a maximum supply current of 7mA and includes a disable mode current specification of 10µA. The 7X-18.432MBE-T specifies 20mA maximum supply current. The 7X18400002 does not specify maximum supply current. For power-sensitive applications, the ASE series is the appropriate selection.

Q: What is the packaging difference between the substitute parts?

A: The 7X-18.432MBE-T and 7X18400002 do not specify packaging format in the provided data. The ASE-18.432MHZ-L-C-T is specified as Tape & Reel (TR) packaging. All three parts use identical 4-SMD No Lead surface mount package type and footprint dimensions.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. The 7X-18.432MBE-T and 7X18400002 are RoHS Compliant and REACH Unaffected. The ASE-18.432MHZ-L-C-T is ROHS3 Compliant and REACH Unaffected. The original TC-18.432MBE-T does not specify these certifications.

Q: Can the ASE-18.432MHZ-L-C-T be used in applications requiring the Enable/Disable function?

A: Yes. The ASE-18.432MHZ-L-C-T includes Enable/Disable function identical to the main part and all other substitutes. The additional Current - Supply (Disable) specification of 10µA indicates the current draw when the oscillator is disabled.