7X-20.000MBE-T CMOS Crystal Oscillator Equivalent & Substitute Parts

Part Overview

The 7X-20.000MBE-T is a 20 MHz CMOS crystal oscillator manufactured by TXC CORPORATION, designed for applications requiring a standard XO (crystal oscillator) with enable/disable functionality. This component operates at 3.3V supply voltage with CMOS output and is housed in a compact 4-SMD, no-lead surface mount package measuring 3.20mm × 2.50mm.

The 7X-20.000MBE-T is classified as obsolete. Locating equivalent and substitute parts is necessary to support ongoing production requirements, field repairs, and design continuity for systems currently utilizing this oscillator.

Substiute Parts

7X-20.000MBE-T

TXC CORPORATIONIn Stock: 9587X-20.000MBE-T Datasheet

Current PartRFQ

ASE-20.000MHZ-L-C-T

Abracon LLCIn Stock: 15252ASE-20.000MHZ-L-C-T Datasheet

DirectRFQ

LFSPXO025495

IQD Frequency ProductsIn Stock: 5442LFSPXO025495 Datasheet

DirectRFQ

SXO32C3A481-20.000M

Suntsu Electronics, Inc.In Stock: 1723SXO32C3A481-20.000M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 7X-20.000MBE-T is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 20 MHz
• 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
• Package Dimensions: 3.20mm × 2.50mm
• Mounting Type: Surface Mount

All three substitute parts listed below meet these mandatory criteria. Variations in supply current, disable current, maximum height, and product status are noted but do not prevent functional substitution when the above parameters are matched.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are functionally equivalent to the 7X-20.000MBE-T based on matching electrical and mechanical specifications. Selection among these alternatives should be based on the following factors:

Product Status: The ASE-20.000MHZ-L-C-T (Abracon LLC), LFSPXO025495 (IQD Frequency Products), and SXO32C3A481-20.000M (Suntsu Electronics, Inc.) are all classified as active products, ensuring ongoing availability and manufacturing support compared to the obsolete 7X-20.000MBE-T.

Regulatory Compliance: All substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. The original 7X-20.000MBE-T is RoHS compliant but not ROHS3 certified.

Supply Current Characteristics: The ASE-20.000MHZ-L-C-T operates at 7mA maximum supply current, the lowest among all options. The SXO32C3A481-20.000M operates at 10mA, and the LFSPXO025495 operates at 12mA. The original 7X-20.000MBE-T requires 20mA. Lower supply current may provide power efficiency benefits in battery-powered or power-constrained applications.

Disable Current: The ASE-20.000MHZ-L-C-T specifies a maximum disable current of 10µA, providing quantified low-power standby performance. The other substitutes do not specify disable current values.

Physical Height: The original 7X-20.000MBE-T has a maximum seated height of 1.10mm. All substitute parts have a maximum seated height of 1.20mm. This 0.10mm difference must be evaluated against PCB layout constraints and clearance requirements in the target application.

Packaging Format: The ASE-20.000MHZ-L-C-T is supplied in Tape & Reel format. The LFSPXO025495 is supplied in Tape & Reel format. The SXO32C3A481-20.000M is supplied in Bulk format. Packaging selection depends on production volume and assembly line requirements.

Frequently Asked Questions (FAQ)

Q: Can the ASE-20.000MHZ-L-C-T directly replace the 7X-20.000MBE-T without circuit modifications?

A: Yes. The ASE-20.000MHZ-L-C-T matches all mandatory electrical parameters: 20 MHz frequency, CMOS output, 3.3V supply voltage, enable/disable function, ±50ppm frequency stability, and -40°C to 85°C operating temperature range. The package type, dimensions (3.20mm × 2.50mm), and mounting type are identical. The maximum seated height difference of 0.10mm (1.20mm vs. 1.10mm) must be verified against PCB clearance specifications.

Q: What is the significance of the frequency stability specification of ±50ppm?

A: Frequency stability of ±50ppm indicates the maximum deviation of the oscillator output frequency from the nominal 20 MHz specification across the operating temperature range (-40°C to 85°C) and over the component's operational lifetime. All substitute parts maintain this specification, ensuring equivalent timing accuracy for the application.

Q: Are there differences in moisture sensitivity between the substitute parts?

A: The 7X-20.000MBE-T and ASE-20.000MHZ-L-C-T are both rated MSL 1 (Unlimited), indicating no moisture sensitivity limitations. The LFSPXO025495 is rated as Not Applicable for MSL. The SXO32C3A481-20.000M does not specify an MSL rating. For applications with strict moisture control requirements, the ASE-20.000MHZ-L-C-T provides explicit MSL 1 certification.

Q: How do the supply current specifications affect component selection?

A: The original 7X-20.000MBE-T requires 20mA maximum supply current. The substitute parts operate at lower currents: ASE-20.000MHZ-L-C-T at 7mA, SXO32C3A481-20.000M at 10mA, and LFSPXO025495 at 12mA. Lower supply current reduces power dissipation and heat generation. In power-constrained applications, the ASE-20.000MHZ-L-C-T offers the most significant power efficiency improvement.

Q: What does the disable current specification indicate?

A: The disable current specification indicates the maximum current drawn by the oscillator when the enable/disable function is activated to place the device in a low-power standby state. The ASE-20.000MHZ-L-C-T specifies 10µA disable current, enabling precise power budget calculations for applications that periodically disable the oscillator to reduce overall system power consumption.

Q: Are all substitute parts available in the same packaging formats?

A: No. The ASE-20.000MHZ-L-C-T and LFSPXO025495 are supplied in Tape & Reel (TR) format, suitable for automated assembly processes. The SXO32C3A481-20.000M is supplied in Bulk format. Packaging format selection depends on production volume, assembly equipment compatibility, and inventory management requirements.

Q: Do all substitute parts meet current environmental and regulatory standards?

A: Yes. All three substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental regulations. The original 7X-20.000MBE-T is RoHS compliant but predates ROHS3 certification. All parts are classified as EAR99 for export control purposes and share the same HTSUS code (8542.39.0001).

Q: What is the practical significance of the 0.10mm height difference between the original and substitute parts?

A: The original 7X-20.000MBE-T has a maximum seated height of 1.10mm, while all substitute parts have a maximum seated height of 1.20mm. This 0.10mm difference must be evaluated against PCB layout constraints, component clearance requirements, and any height-restricted applications such as thin-profile devices or systems with limited vertical space. In most standard applications, this difference is not significant.

Q: Which substitute part offers the best overall balance of performance and availability?

A: Selection depends on specific application requirements. The ASE-20.000MHZ-L-C-T (Abracon LLC) offers the lowest supply current (7mA), specified disable current (10µA), and explicit MSL 1 rating. The LFSPXO025495 (IQD Frequency Products) provides a mid-range supply current (12mA) with active product status. The SXO32C3A481-20.000M (Suntsu Electronics, Inc.) offers moderate supply current (10mA) with bulk packaging availability. All three are active products with superior availability compared to the obsolete 7X-20.000MBE-T.