7X-40.000MBD-T CMOS Oscillator Equivalent & Substitute Parts

Part Overview

The 7X-40.000MBD-T is a 40 MHz XO (Standard) CMOS oscillator manufactured by TXC CORPORATION. This surface mount crystal oscillator operates at 3.3V with enable/disable functionality, designed for applications requiring stable frequency generation in a compact 4-SMD, No Lead package. The part is currently Active in product status with full RoHS compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when original inventory is unavailable or when equivalent electrical and mechanical specifications allow direct replacement without design modification.

Substiute Parts

7X-40.000MBD-T

TXC CORPORATIONIn Stock: 11567X-40.000MBD-T Datasheet

Current PartRFQ

SXO32C3C481-40.000M

Suntsu Electronics, Inc.In Stock: 1764SXO32C3C481-40.000M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7X-40.000MBD-T is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Frequency: 40 MHz (exact match required)
• Output: CMOS (logic family match required)
• Supply Voltage: 3.3V (voltage compatibility required)
• Function: Enable/Disable (functional feature match required)
• Frequency Stability: ±25ppm (tolerance match required)
• Operating Temperature: -40°C ~ 85°C (range match required)

Mechanical Parameters:

• Package Type: 4-SMD, No Lead (footprint compatibility required)
• Package Dimensions: 0.126" L x 0.098" W / 3.20mm x 2.50mm (dimensional match required)
• Mounting Type: Surface Mount (assembly process compatibility required)

Compliance Parameters:

• RoHS Status: Compliant (regulatory requirement match)
• REACH Status: Unaffected (regulatory requirement match)

The substitute part SXO32C3C481-40.000M meets all critical electrical, mechanical, and compliance parameters for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: 7X-40.000MBD-T

The 7X-40.000MBD-T remains the primary component choice when available. This part carries Active product status, full RoHS compliance, and MSL 1 rating (unlimited moisture sensitivity), indicating superior handling flexibility in manufacturing environments. Current supply inventory of 1090 pieces supports production continuity.

Substitute Selection: SXO32C3C481-40.000M

The SXO32C3C481-40.000M qualifies as a direct electrical and mechanical substitute when the primary part is unavailable. This Suntsu Electronics part maintains identical frequency (40 MHz), output type (CMOS), supply voltage (3.3V), function (Enable/Disable), frequency stability (±25ppm), and operating temperature range (-40°C ~ 85°C). Package footprint and dimensions are identical, ensuring PCB layout compatibility without redesign.

Compatibility Considerations:

The substitute part exhibits two minor parameter variations that remain within acceptable engineering tolerances:

1. Maximum supply current: 17mA (substitute) versus 15mA (primary). The substitute draws 2mA additional current under maximum conditions. This difference is acceptable for applications where power budget accommodates the variance.

2. Maximum seated height: 0.047" / 1.20mm (substitute) versus 0.043" / 1.10mm (primary). The 0.004" / 0.10mm height increase is negligible for standard PCB assembly and does not affect component clearance in typical applications.

Both parts carry Active product status and meet REACH compliance requirements. The substitute part carries ROHS3 certification, which represents a higher environmental standard than the primary part's RoHS compliance.

Frequently Asked Questions (FAQ)

Q: Can SXO32C3C481-40.000M be used as a direct replacement for 7X-40.000MBD-T without PCB modification?

A: Yes. Both parts share identical package type (4-SMD, No Lead), footprint dimensions (0.126" L x 0.098" W / 3.20mm x 2.50mm), and mounting type (Surface Mount). No PCB layout changes are required for substitution.

Q: What is the impact of the 2mA higher supply current in the substitute part?

A: The SXO32C3C481-40.000M draws a maximum of 17mA compared to 15mA for the 7X-40.000MBD-T. This 2mA difference affects total system power consumption. Verify that your power supply and current distribution network can accommodate this variance. For most applications, this difference is negligible.

Q: Does the 0.004" height difference affect component placement or clearance?

A: The substitute part's maximum seated height of 0.047" (1.20mm) versus 0.043" (1.10mm) for the primary part represents a 0.004" increase. This variation is within standard PCB assembly tolerances and does not affect component clearance in typical applications. Verify clearance only if your design has height-critical constraints.

Q: Are both parts RoHS compliant?

A: Yes. The 7X-40.000MBD-T carries RoHS compliance. The SXO32C3C481-40.000M carries ROHS3 compliance, which represents a higher environmental standard. Both parts meet RoHS regulatory requirements.

Q: What is the difference between MSL 1 and unspecified moisture sensitivity?

A: The 7X-40.000MBD-T carries MSL 1 rating, indicating unlimited shelf life under moisture-controlled conditions. The SXO32C3C481-40.000M does not specify an MSL rating in available documentation. For applications requiring extended storage or high-humidity environments, the primary part's MSL 1 rating provides superior handling flexibility.

Q: Can I use the substitute part in new designs?

A: Yes. The SXO32C3C481-40.000M meets all electrical and mechanical specifications for the 7X-40.000MBD-T. Both parts are Active in product status. Either part is suitable for new design implementation. Component selection should consider inventory availability, lead time, and cost factors.

Q: Are there any frequency or stability differences between these parts?

A: No. Both parts operate at 40 MHz with ±25ppm frequency stability. Electrical performance is equivalent across all specified parameters.