7C-40.000MBA-T CMOS Oscillator Equivalent & Substitute Parts

Part Overview

The 7C-40.000MBA-T is a 40 MHz XO (Standard) CMOS oscillator manufactured by TXC CORPORATION, designed for applications requiring a 3.3V enable/disable crystal oscillator in a compact 4-SMD, No Lead surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent substitute components from active product lines. The oscillator delivers CMOS output with ±25ppm frequency stability across an operating temperature range of -10°C to 70°C, with a maximum supply current of 30mA.

Substiute Parts

7C-40.000MBA-T

TXC CORPORATIONIn Stock: 21457C-40.000MBA-T Datasheet

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7C-40.000MBB-T

TXC CORPORATIONIn Stock: 8807C-40.000MBB-T Datasheet

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7C-40.000MBC-T

TXC CORPORATIONIn Stock: 8947C-40.000MBC-T Datasheet

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7CL-40.000MBD-T

TXC CORPORATIONIn Stock: 7727CL-40.000MBD-T Datasheet

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SXO53C3C171-40.000M

Suntsu Electronics, Inc.In Stock: 2335SXO53C3C171-40.000M Datasheet

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CPPC5L-A3B6-40.0TS

Cardinal Components Inc.In Stock: 1067CPPC5L-A3B6-40.0TS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7C-40.000MBA-T is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 40 MHz
• Output Type: CMOS
• Supply Voltage: 3.3V
• Function: Enable/Disable
• Package Type: 4-SMD, No Lead
• Physical Dimensions: 5.00mm x 3.20mm footprint
• Mounting Type: Surface Mount

Allowable Variation Parameters:

• Frequency Stability: ±25ppm (main part) to ±100ppm (acceptable tolerance range for substitution)
• Operating Temperature Range: -10°C ~ 70°C (main part) to -40°C ~ 85°C or -55°C ~ 125°C (wider ranges acceptable)
• Maximum Supply Current: 30mA (main part) to 25mA (lower current acceptable)
• RoHS Status: RoHS Compliant or ROHS3 Compliant (both acceptable)

Substitute parts must maintain identical frequency, output type, supply voltage, function, and package specifications. Variations in frequency stability, operating temperature, and supply current are acceptable when the substitute part meets or exceeds the performance envelope of the original component.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Closest Match): The 7CL-40.000MBD-T from TXC CORPORATION is the primary recommended substitute. This part maintains identical frequency stability (±25ppm) and supply current specifications as the original 7C-40.000MBA-T, while offering an extended operating temperature range (-40°C ~ 85°C) and ROHS3 compliance. The part is currently active in production with 745 units in stock.

Secondary Substitutes (Active Alternatives): The 7C-40.000MBB-T and 7C-40.000MBC-T are functionally compatible alternatives from TXC CORPORATION. Both parts are active and available in quantity. The 7C-40.000MBB-T exhibits ±50ppm frequency stability, while the 7C-40.000MBC-T operates at ±100ppm. Both maintain the original operating temperature range and supply current specifications.

Cross-Manufacturer Alternatives: The SXO53C3C171-40.000M (Suntsu Electronics) and CPPC5L-A3B6-40.0TS (Cardinal Components) provide functionally equivalent substitutes with active product status. The Suntsu part matches the original frequency stability (±25ppm) with reduced supply current (25mA). The Cardinal Components part offers the widest operating temperature range (-55°C ~ 125°C) with ±100ppm frequency stability and includes disable current specification (50µA).

All substitute parts maintain RoHS compliance and are suitable for direct replacement in applications where the original 7C-40.000MBA-T was specified, provided that the application requirements fall within the specified parameter ranges of the selected substitute.

Frequently Asked Questions (FAQ)

Q: Can the 7C-40.000MBB-T replace the 7C-40.000MBA-T in all applications?

A: The 7C-40.000MBB-T is functionally compatible for applications where ±50ppm frequency stability is acceptable. The original part specifies ±25ppm stability. Applications with tighter frequency tolerance requirements should select the 7CL-40.000MBD-T or SXO53C3C171-40.000M, both of which maintain ±25ppm stability.

Q: What is the difference between the 7C and 7CL series?

A: The 7CL-40.000MBD-T (7CL series) extends the operating temperature range to -40°C ~ 85°C compared to the -10°C ~ 70°C range of the 7C series. Both maintain identical frequency stability and supply current specifications. The 7CL series is recommended for applications requiring wider temperature operation.

Q: Are there packaging differences between substitute parts?

A: The primary substitute parts (7C-40.000MBB-T, 7C-40.000MBC-T, 7CL-40.000MBD-T, and SXO53C3C171-40.000M) maintain identical 5.00mm x 3.20mm x 1.40mm dimensions. The CPPC5L-A3B6-40.0TS has a slightly reduced height of 1.30mm maximum, which remains compatible with standard 4-SMD, No Lead footprints.

Q: Which substitute offers the best frequency stability?

A: The 7CL-40.000MBD-T and SXO53C3C171-40.000M both maintain ±25ppm frequency stability, matching the original 7C-40.000MBA-T specification. These parts are recommended for applications requiring the tightest frequency tolerance.

Q: Can I use the CPPC5L-A3B6-40.0TS in high-temperature applications?

A: Yes. The CPPC5L-A3B6-40.0TS operates across -55°C ~ 125°C, providing the widest temperature range among all substitute options. This part is suitable for applications requiring extended temperature operation beyond the original -10°C ~ 70°C specification.

Q: What is the supply current difference between substitutes?

A: The original 7C-40.000MBA-T and most TXC substitutes specify 30mA maximum supply current. The SXO53C3C171-40.000M and CPPC5L-A3B6-40.0TS specify 25mA, representing a 5mA reduction. This lower current consumption is acceptable and beneficial for power-constrained applications.

Q: Are all substitutes RoHS compliant?

A: Yes. The original part is RoHS Compliant. All substitute parts are either RoHS Compliant or ROHS3 Compliant, both of which meet current regulatory requirements.