TXC CORPORATION 9C07370004 Equivalent & Substitute Parts

Part Overview

The TXC CORPORATION 9C07370004 is a 7.3728 MHz crystal oscillator with 18pF load capacitance, designed for surface mount applications in the HC-49/US package. This component operates across the industrial temperature range of -40°C to 85°C with ±30ppm frequency stability. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and field replacement requirements.

Substiute Parts

9C07370004

TXC CORPORATIONIn Stock: 7589C07370004 Datasheet

Current PartRFQ

ABLS2-7.3728MHZ-D4Y-T

Abracon LLCIn Stock: 25441ABLS2-7.3728MHZ-D4Y-T Datasheet

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ABLS3-7.3728MHZ-D4Y-T

Abracon LLCIn Stock: 1702ABLS3-7.3728MHZ-D4Y-T Datasheet

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LP073F33IDT

CTS-Frequency ControlsIn Stock: 1079LP073F33IDT Datasheet

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LP073F33IET

CTS-Frequency ControlsIn Stock: 1220LP073F33IET Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 9C07370004 is determined by strict alignment of the following critical parameters:

Primary Matching Criteria:

• Frequency: 7.3728 MHz (exact match required)
• Frequency Stability: ±30ppm (exact match required)
• Load Capacitance: 18pF (exact match required)
• Package / Case: HC-49/US (exact match required)
• Operating Temperature Range: -40°C to 85°C (exact match required)
• Mounting Type: Surface Mount (exact match required)

Secondary Compatibility Factors:

• ESR (Equivalent Series Resistance): 80 Ohms preferred; 100 Ohms acceptable within circuit design margins
• RoHS3 Compliance: Required for regulatory alignment
• Product Status: Active status preferred for long-term availability

Parts meeting all primary criteria are classified as direct electrical equivalents. Parts with ESR variations (80 Ohms vs. 100 Ohms) remain functionally compatible provided circuit design accommodates the specified tolerance range.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (18pF Load Capacitance, 80 Ohms ESR):

LP073F33IDT (CTS-Frequency Controls) is the primary direct electrical equivalent to the 9C07370004. This part maintains identical frequency, stability, load capacitance, and ESR specifications while offering active product status and established supply chain availability. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1), matching the original component's environmental classification.

Compatible Alternatives (18pF Load Capacitance, 100 Ohms ESR):

ABLS2-7.3728MHZ-D4Y-T and ABLS3-7.3728MHZ-D4Y-T (Abracon LLC) provide functional equivalence with a 20 Ohm ESR increase. Both parts maintain all critical electrical parameters and operate within the specified temperature range. ABLS3-7.3728MHZ-D4Y-T offers the lowest profile height (2.50mm seated) among active alternatives. These parts are suitable for applications where circuit design accommodates the specified ESR tolerance band.

Load Capacitance Variation (Not Recommended as Primary Selection):

LP073F33IET (CTS-Frequency Controls) operates at 20pF load capacitance rather than 18pF. This deviation from the original specification introduces frequency offset risk and is not recommended as a direct substitute without circuit re-characterization.

Selection Priority Based on Availability and Compliance:

1. LP073F33IDT: Direct electrical match, active status, 1055 units available
2. ABLS3-7.3728MHZ-D4Y-T: Active status, lowest profile, 1682 units available
3. ABLS2-7.3728MHZ-D4Y-T: Active status, highest inventory (25388 units), suitable for high-volume applications

Frequently Asked Questions (FAQ)

Q: Can ABLS2-7.3728MHZ-D4Y-T or ABLS3-7.3728MHZ-D4Y-T be used as direct replacements despite the 100 Ohms ESR specification?

A: Yes, within circuit design margins. Both Abracon parts maintain the critical frequency (7.3728 MHz), stability (±30ppm), load capacitance (18pF), and temperature range specifications. The 20 Ohm ESR increase from 80 to 100 Ohms is a secondary parameter. Compatibility depends on circuit design tolerance for ESR variation. Circuits designed with ESR margin accommodation will function without modification.

Q: Why is LP073F33IET not recommended as a primary substitute?

A: LP073F33IET specifies 20pF load capacitance instead of 18pF. This deviation from the original 9C07370004 specification creates frequency offset risk. The part is listed as a substitute option but requires circuit re-characterization and frequency verification before deployment.

Q: What is the significance of product status (Obsolete vs. Active)?

A: The 9C07370004 is classified as obsolete, indicating TXC CORPORATION has discontinued production. Active status parts (ABLS2, ABLS3, LP073F33IDT, LP073F33IET) ensure ongoing manufacturing availability, established supply chains, and long-term procurement reliability. Active parts are preferred for new designs and field replacement programs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original component's regulatory status. This ensures compatibility with environmental and procurement requirements.

Q: What is the difference between ABLS2 and ABLS3 series?

A: Both ABLS2-7.3728MHZ-D4Y-T and ABLS3-7.3728MHZ-D4Y-T maintain identical electrical specifications (7.3728 MHz, ±30ppm, 18pF, 100 Ohms ESR). The primary difference is physical height: ABLS2 seated height is 3.30mm, while ABLS3 seated height is 2.50mm. ABLS3 is suitable for space-constrained applications. ABLS2 offers significantly higher inventory availability (25388 units vs. 1682 units).

Q: Does moisture sensitivity level (MSL) affect substitution compatibility?

A: MSL classification affects handling and storage procedures but does not impact electrical performance or functional substitution. The original 9C07370004 specifies MSL 1 (Unlimited). LP073F33IDT also specifies MSL 1. Abracon parts (ABLS2, ABLS3) specify "Not Applicable," indicating different moisture classification standards. Both approaches are acceptable for surface mount crystal applications.

Q: Can these parts be used interchangeably in existing PCB designs without layout modification?

A: All substitute parts maintain HC-49/US package specification and surface mount mounting type, ensuring mechanical compatibility with existing PCB footprints. Physical dimensions vary slightly (length 11.10mm to 11.40mm, width 4.70mm to 4.83mm, height 2.50mm to 4.10mm), but these variations remain within standard HC-49/US tolerance bands. PCB layout modification is not required.