9C18400096 18.432 MHz Crystal Equivalent & Substitute Parts

Part Overview

The 9C18400096 is an 18.432 MHz surface mount crystal manufactured by TXC CORPORATION in the HC-49/US package. This component is classified as obsolete product status. The 18.432 MHz frequency is commonly used in telecommunications, audio processing, and industrial timing applications. Due to obsolete status, equivalent substitute parts from active manufacturers are necessary for new designs and ongoing production requirements.

Substiute Parts

9C18400096

TXC CORPORATIONIn Stock: 11409C18400096 Datasheet

Current PartRFQ

ABLS2-18.432MHZ-B4Y-T

Abracon LLCIn Stock: 932ABLS2-18.432MHZ-B4Y-T Datasheet

SimilarRFQ

LP184F33CDT

CTS-Frequency ControlsIn Stock: 806LP184F33CDT Datasheet

SimilarRFQ

LP184F33CET

CTS-Frequency ControlsIn Stock: 965LP184F33CET Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 9C18400096 is determined by the following critical parameters:

Primary Matching Criteria:

• Frequency: 18.432 MHz (exact match required)
• Frequency Stability: ±30ppm (exact match required)
• Package / Case: HC-49/US (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -20°C ~ 70°C (minimum requirement)

Secondary Compatibility Factors:

• Load Capacitance: 18pF (primary specification); 20pF variants acceptable with circuit design verification
• ESR: 30 Ohms (original); 40 Ohms (acceptable within HC-49/US standard tolerance)
• RoHS3 Compliance: Required for environmental and regulatory alignment

The substitute parts listed below meet all primary matching criteria. Variations in ESR and load capacitance are within acceptable ranges for HC-49/US crystal oscillators and do not prevent functional substitution in standard applications.

Parameter Comparison

Engineering Selection Recommendations

ABLS2-18.432MHZ-B4Y-T (Abracon LLC): This substitute provides direct parameter alignment with 18pF load capacitance matching the original specification. ESR is 40 Ohms, which is within acceptable tolerance for HC-49/US package standards. The part is active status with ROHS3 compliance. Inventory availability is 843 units. This option is suitable for applications where load capacitance specification is critical.

LP184F33CDT (CTS-Frequency Controls): This substitute maintains 18pF load capacitance specification identical to the original part. ESR is 40 Ohms. The part is active status with ROHS3 compliance and supplied in Tape & Reel packaging. Inventory availability is 719 units. Dimensions are slightly reduced (11.10mm x 4.83mm vs. 11.40mm x 4.80mm), with lower seated height (3.20mm vs. 4.10mm), providing improved PCB layout flexibility.

LP184F33CET (CTS-Frequency Controls): This substitute differs in load capacitance specification at 20pF versus the original 18pF. All other electrical parameters align: 18.432 MHz frequency, ±30ppm stability, 40 Ohms ESR, and -20°C ~ 70°C operating range. The part is active status with ROHS3 compliance and supplied in Tape & Reel packaging. Inventory availability is 928 units. This option is applicable when circuit design accommodates 20pF load capacitance or when load capacitance tuning is available in the application.

All three substitutes are surface mount HC-49/US package crystals with identical frequency and stability specifications. Selection should be based on load capacitance requirements, PCB layout constraints, and packaging preferences.

Frequently Asked Questions (FAQ)

Q: Can the ABLS2-18.432MHZ-B4Y-T replace the 9C18400096 directly?

A: Yes. Both parts share identical frequency (18.432 MHz), frequency stability (±30ppm), load capacitance (18pF), package (HC-49/US), and operating temperature range (-20°C ~ 70°C). The ESR difference (40 Ohms vs. 30 Ohms) is within HC-49/US standard tolerance and does not prevent direct substitution in standard applications.

Q: What is the difference between LP184F33CDT and LP184F33CET?

A: The primary difference is load capacitance: LP184F33CDT specifies 18pF (matching the original 9C18400096), while LP184F33CET specifies 20pF. Both parts share identical frequency, stability, ESR (40 Ohms), package, and temperature range. Selection depends on circuit load capacitance requirements.

Q: Does the 20pF load capacitance of LP184F33CET affect compatibility?

A: Load capacitance affects crystal oscillation frequency in the application circuit. The LP184F33CET is suitable for circuits designed for 20pF load capacitance. If the original circuit requires 18pF, use LP184F33CDT or ABLS2-18.432MHZ-B4Y-T instead.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three substitute parts (ABLS2-18.432MHZ-B4Y-T, LP184F33CDT, and LP184F33CET) are ROHS3 compliant, matching the environmental compliance of the original 9C18400096.

Q: What is the significance of the ESR difference (30 Ohms vs. 40 Ohms)?

A: ESR (Equivalent Series Resistance) affects crystal startup time and power consumption in oscillator circuits. The 40 Ohms ESR of substitute parts is within HC-49/US package standard tolerance. For most applications, this difference is not significant. High-precision timing applications should verify ESR impact through circuit simulation or testing.

Q: Do the dimensional differences between substitute parts affect PCB layout?

A: Yes. The CTS parts (LP184F33CDT and LP184F33CET) have reduced seated height (3.20mm vs. 4.10mm) and slightly different length/width dimensions. These differences provide improved PCB layout flexibility but require verification of footprint compatibility with existing PCB designs.

Q: Which substitute part has the best inventory availability?

A: LP184F33CET has the highest inventory at 928 units, followed by ABLS2-18.432MHZ-B4Y-T at 843 units, and LP184F33CDT at 719 units.

Q: Can I use these substitutes in new product designs?

A: Yes. All three substitute parts are active status products from established manufacturers (Abracon LLC and CTS-Frequency Controls) with ROHS3 compliance. They are suitable for new product designs requiring 18.432 MHz crystals in HC-49/US packages.