7X-12.000MBD-T CMOS Oscillator Equivalent & Substitute Parts

Part Overview

The 7X-12.000MBD-T is a 12 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 in active production status with full RoHS compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified to provide design flexibility, supply chain alternatives, and equivalent performance characteristics for applications where the primary part may be unavailable or where alternative packaging configurations are acceptable.

Key Parameters

Parameter	Value	Unit
Frequency	12.0000	MHz
Output Type	CMOS	-
Supply Voltage	3.3	V
Frequency Stability	±25	ppm
Operating Temperature Range	-40 to +85	°C
Package Type	4-SMD, No Lead	-
Mounting Type	Surface Mount	-
Function	Enable/Disable	-
RoHS Status	Compliant	-

Substitute Part Grouping Explanation

Substitution of the 7X-12.000MBD-T with the SXO32C3C481-12.000M is based on electrical and mechanical parameter equivalence. The critical substitution criteria are:

Electrical Equivalence:

Identical frequency: 12.0000 MHz
Identical output type: CMOS
Identical supply voltage: 3.3V
Identical frequency stability: ±25 ppm
Identical operating temperature range: -40°C to +85°C
Identical function: Enable/Disable capability

Mechanical Equivalence:

Identical package type: 4-SMD, No Lead
Identical footprint dimensions: 0.126" L x 0.098" W (3.20mm x 2.50mm)
Identical mounting type: Surface Mount

Compliance Equivalence:

Both parts are RoHS compliant
Both parts carry EAR99 ECCN classification
Both parts share identical HTSUS code: 8542.39.0001

The substitute part operates within the same electrical specifications and occupies the same PCB footprint, enabling direct substitution in circuit designs.

Parameter Comparison

Parameter	7X-12.000MBD-T (TXC)	SXO32C3C481-12.000M (Suntsu)	Compatibility
Frequency	12.0000 MHz	12.0000 MHz	Equivalent
Output Type	CMOS	CMOS	Equivalent
Supply Voltage	3.3V	3.3V	Equivalent
Frequency Stability	±25 ppm	±25 ppm	Equivalent
Operating Temperature	-40°C to +85°C	-40°C to +85°C	Equivalent
Current - Supply (Max)	15 mA	10 mA	Compatible (Substitute lower)
Package / Case	4-SMD, No Lead	4-SMD, No Lead	Equivalent
Size / Dimension	0.126" L x 0.098" W (3.20mm x 2.50mm)	0.126" L x 0.098" W (3.20mm x 2.50mm)	Equivalent
Height - Seated (Max)	0.043" (1.10mm)	0.047" (1.20mm)	Compatible (Substitute higher by 0.10mm)
Mounting Type	Surface Mount	Surface Mount	Equivalent
Function	Enable/Disable	Enable/Disable	Equivalent
RoHS Status	RoHS Compliant	ROHS3 Compliant	Compatible (Substitute higher standard)
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

Primary Part Selection (7X-12.000MBD-T): Select the TXC 7X-12.000MBD-T when the original design specification requires the exact part number, when tape and reel packaging is mandatory for automated assembly, or when the lower maximum seated height (1.10mm) is a critical constraint in space-limited applications.

Substitute Part Selection (SXO32C3C481-12.000M): Select the Suntsu SXO32C3C481-12.000M when supply chain availability of the primary part is limited, when bulk packaging is acceptable for the application, or when the lower maximum supply current (10mA versus 15mA) provides power consumption benefits. The substitute part meets or exceeds all electrical specifications and occupies the same PCB footprint. The maximum seated height difference of 0.10mm (1.20mm versus 1.10mm) is negligible for most applications and does not affect PCB assembly clearances in standard designs.

Both parts carry active product status and full compliance certifications (RoHS and EAR99), ensuring long-term availability and regulatory acceptance.

Frequently Asked Questions (FAQ)

Q: Can the SXO32C3C481-12.000M directly replace the 7X-12.000MBD-T on the PCB?

A: Yes. Both parts share identical electrical specifications (12 MHz, 3.3V, CMOS output, ±25 ppm stability, -40°C to +85°C operating range) and identical footprint dimensions (3.20mm x 2.50mm). The 0.10mm difference in maximum seated height does not affect standard PCB assembly or component clearances.

Q: What is the difference in supply current between these parts?

A: The TXC 7X-12.000MBD-T specifies a maximum supply current of 15mA, while the Suntsu SXO32C3C481-12.000M specifies 10mA. The substitute part draws less current, which is compatible with designs rated for the higher specification.

Q: Are there packaging differences between these parts?

A: Yes. The 7X-12.000MBD-T is supplied in Tape & Reel (TR) packaging, while the SXO32C3C481-12.000M is supplied in Bulk packaging. Both are surface mount 4-SMD, No Lead packages with identical footprints. Tape & Reel packaging is optimized for automated pick-and-place assembly, while Bulk packaging is suitable for manual assembly or lower-volume applications.

Q: Do both parts meet RoHS compliance?

A: Yes. The 7X-12.000MBD-T is RoHS Compliant, and the SXO32C3C481-12.000M is ROHS3 Compliant. ROHS3 represents a higher standard of compliance, making the substitute part fully acceptable for applications requiring RoHS certification.

Q: What is the frequency stability specification, and is it identical between parts?

A: Both parts specify ±25 ppm frequency stability across the -40°C to +85°C operating temperature range. This specification is identical and ensures equivalent performance in timing-critical applications.

Q: Can I use the substitute part in a new design, or only as a replacement?

A: The SXO32C3C481-12.000M can be used in new designs. Both parts are in active production status with equivalent electrical and mechanical specifications. Design selection should be based on packaging requirements (Tape & Reel versus Bulk), supply chain availability, and power consumption considerations.

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