7M-18.432MBBK-T Equivalent & Substitute Parts Reference

Part Overview

The 7M-18.432MBBK-T is an 18.432 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION. This surface mount device operates at ±50ppm frequency stability with a 20pF load capacitance and 80 Ohms equivalent series resistance. The component is packaged in a 4-SMD, No Lead configuration with dimensions of 3.20mm × 2.50mm and a maximum seated height of 0.80mm. The part maintains Active product status and is RoHS Compliant with MSL Level 1 (Unlimited moisture sensitivity). Substitute parts are identified when inventory constraints, packaging format requirements, or enhanced frequency stability specifications necessitate alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

7M-18.432MBBK-T

TXC CORPORATIONIn Stock: 7657M-18.432MBBK-T Datasheet

Current PartRFQ

ECS-184-20-33-CKM-TR

ECS Inc.In Stock: 4003ECS-184-20-33-CKM-TR Datasheet

UpgradeRFQ

ECS-184-20-33-DU-TR

ECS Inc.In Stock: 2066ECS-184-20-33-DU-TR Datasheet

SimilarRFQ

ECS-184-20-33-TR

ECS Inc.In Stock: 1716ECS-184-20-33-TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 7M-18.432MBBK-T are classified based on strict adherence to critical electrical and mechanical parameters. All identified substitutes maintain the following mandatory specifications: 18.432 MHz frequency, 20pF load capacitance, 80 Ohms ESR, 4-SMD No Lead package, 3.20mm × 2.50mm dimensions, and 0.80mm maximum seated height. Substitution categories are defined as follows:

Upgrade Substitutes: Parts with enhanced frequency stability (tighter tolerance) while maintaining all other critical parameters. These provide improved performance for applications requiring higher frequency accuracy.

Similar Substitutes: Parts with identical electrical specifications but different packaging formats (Cut Tape vs. Tape & Reel) or extended operating temperature ranges. These accommodate specific procurement or environmental requirements.

Parametric Equivalents: Parts with identical electrical and mechanical specifications to the main part, differing only in manufacturer or series designation. These provide direct functional replacement.

All substitute relationships are based exclusively on the parameters provided: frequency, frequency stability, load capacitance, ESR, operating mode, package type, physical dimensions, height, operating temperature range, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (7M-18.432MBBK-T): Select this TXC CORPORATION part when the original specification is required and inventory is available. The part maintains Active product status with RoHS Compliance and REACH Unaffected designation, confirming regulatory alignment for current manufacturing standards.

Upgrade Selection (ECS-184-20-33-CKM-TR): Select this substitute when enhanced frequency stability is required. The ±10ppm frequency tolerance provides tighter accuracy compared to the ±50ppm specification of the main part, while maintaining identical electrical and mechanical parameters. This part is packaged in Tape & Reel format and carries ROHS3 Compliant certification with higher inventory availability (3976 units).

Extended Temperature Selection (ECS-184-20-33-DU-TR): Select this substitute when the application requires operation beyond the standard -20°C to 70°C range. This part extends the operating temperature to -55°C ~ 125°C, accommodating industrial or automotive environments. The frequency stability specification is ±100ppm, which is broader than the main part. This part is supplied in Cut Tape format and carries ROHS3 Compliant certification.

Direct Equivalent Selection (ECS-184-20-33-TR): Select this substitute when a parametric equivalent from ECS Inc. is required. This part maintains identical electrical specifications (±50ppm frequency stability) and operating temperature range (-20°C ~ 70°C) as the main part. It is packaged in Tape & Reel format with RoHS Compliance certification.

All substitute parts maintain the critical parameters of 18.432 MHz frequency, 20pF load capacitance, 80 Ohms ESR, and 4-SMD No Lead package configuration. Selection should be based on specific application requirements regarding frequency accuracy, temperature environment, and packaging format availability.

Frequently Asked Questions (FAQ)

Q: Can ECS-184-20-33-CKM-TR be used as a direct replacement for 7M-18.432MBBK-T?

A: Yes, with the understanding that this substitute provides enhanced frequency stability. The ECS-184-20-33-CKM-TR maintains all critical electrical parameters (18.432 MHz, 20pF load capacitance, 80 Ohms ESR) and identical mechanical specifications (4-SMD No Lead, 3.20mm × 2.50mm, 0.80mm height). The ±10ppm frequency tolerance is tighter than the ±50ppm specification of the main part, making it suitable for applications requiring higher accuracy.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on continuous tape wound on reels, suitable for high-volume automated assembly. Cut Tape (CT) packaging supplies components on tape segments cut to specific lengths, suitable for lower-volume or manual assembly operations. Both formats contain identical components; the difference is in procurement and handling format.

Q: Can ECS-184-20-33-DU-TR be used in applications requiring -20°C to 70°C operation?

A: Yes. The ECS-184-20-33-DU-TR operates across -55°C ~ 125°C, which encompasses the -20°C to 70°C range. However, this part specifies ±100ppm frequency stability, which is broader than the ±50ppm specification of the main part. Verify that the application can tolerate this wider frequency tolerance before selection.

Q: Are all substitute parts RoHS compliant?

A: Yes. The main part (7M-18.432MBBK-T) is RoHS Compliant. All substitute parts carry either RoHS Compliant or ROHS3 Compliant certification, confirming compliance with current and updated RoHS directives.

Q: What does MSL Level 1 (Unlimited) mean?

A: MSL (Moisture Sensitivity Level) 1 indicates the lowest moisture sensitivity classification. "Unlimited" means the component can be stored indefinitely without special moisture control measures, provided standard storage conditions are maintained. All parts in this comparison carry MSL Level 1 (Unlimited).

Q: Can I substitute based on frequency alone?

A: No. While frequency (18.432 MHz) is critical, substitution requires matching all critical parameters: frequency stability, load capacitance (20pF), ESR (80 Ohms), operating mode (Fundamental), package type (4-SMD No Lead), and physical dimensions (3.20mm × 2.50mm × 0.80mm height). Mismatches in these parameters will result in circuit malfunction or performance degradation.

Q: What is the significance of ±50ppm vs. ±10ppm frequency stability?

A: Frequency stability defines the maximum deviation from the nominal frequency across operating conditions. ±50ppm means the frequency can deviate up to 50 parts per million from 18.432 MHz. ±10ppm provides tighter accuracy, deviating only up to 10 parts per million. Applications requiring precise timing or communication protocols may require the tighter ±10ppm specification.

Q: Are all parts suitable for the same PCB footprint?

A: Yes. All parts maintain identical package specifications (4-SMD No Lead) and physical dimensions (3.20mm × 2.50mm with 0.80mm maximum height). They are designed for the same PCB footprint and can be used interchangeably from a physical placement perspective.