38.4 MHz Crystal 9pF SMD Equivalent & Substitute Parts (8Q-38.400MEEC-T)

Part Overview

The 8Q-38.400MEEC-T is a 38.4 MHz fundamental mode crystal oscillator manufactured by TXC Corporation, designed for surface mount applications requiring precise frequency control. This active product features a 9pF load capacitance, 80 Ohms equivalent series resistance, and operates across the -20°C to 70°C temperature range. The component is packaged in a 4-SMD, No Lead configuration with RoHS compliance and MSL 1 moisture sensitivity rating. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications utilizing this frequency standard.

Substiute Parts

8Q-38.400MEEC-T

TXC CORPORATIONIn Stock: 9368Q-38.400MEEC-T Datasheet

Current PartRFQ

ECS-384-10-47-CKM-TR

ECS Inc.In Stock: 7501ECS-384-10-47-CKM-TR Datasheet

SimilarRFQ

8Q-38.400MEEC-T

FTSIn Stock: 49608Q-38.400MEEC-T Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 8Q-38.400MEEC-T are identified based on strict alignment with critical electrical and mechanical parameters. All substitutes must maintain the following specifications:

Critical Matching Parameters:

• Frequency: 38.4 MHz (exact match required)
• Frequency Stability: ±10ppm (tolerance specification)
• ESR: 80 Ohms (oscillator circuit compatibility)
• Operating Mode: Fundamental (frequency generation method)
• Operating Temperature Range: -20°C to 70°C (environmental specification)
• Mounting Type: Surface Mount (assembly compatibility)
• Package / Case: 4-SMD, No Lead (physical interface)
• Size / Dimension: 0.063" L x 0.047" W (1.60mm x 1.20mm) (footprint compatibility)

Allowable Variation Parameter:

• Load Capacitance: 9pF or 10pF (minor variation acceptable within circuit design tolerance)

Substitutes are grouped into two categories: direct equivalents matching all parameters including load capacitance, and parametric equivalents with minor load capacitance variation that remain functionally compatible within standard oscillator circuit design margins.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Parametric Match): The 8Q-38.400MEEC-T manufactured by FTS is a direct parametric equivalent, matching all critical electrical specifications including 9pF load capacitance, 80 Ohms ESR, ±10ppm frequency stability, and identical physical dimensions. Both the TXC and FTS versions maintain RoHS compliance and MSL 1 rating. This substitute provides identical circuit performance with no design modifications required.

Functional Substitute (Minor Parameter Variation): The ECS-384-10-47-CKM-TR from ECS Inc. is a functional substitute with a 10pF load capacitance specification compared to the 9pF of the primary part. All other critical parameters—frequency, stability, ESR, operating temperature, mounting type, package, and physical dimensions—are identical. The 1pF load capacitance difference falls within standard oscillator circuit design tolerance margins and does not require circuit redesign. This part is ROHS3 compliant and maintains MSL 1 rating. The ECS substitute is available in Tape & Reel packaging, offering higher inventory availability (7,474 units in stock).

Packaging Consideration: The primary TXC part is supplied in Cut Tape (CT) packaging. Both substitute parts are supplied in Tape & Reel (TR) packaging, which is standard for high-volume production environments and automated assembly processes.

Compliance Status: All three parts maintain active product status and meet RoHS environmental compliance requirements. The FTS equivalent provides identical compliance profile to the TXC original. The ECS substitute provides ROHS3 compliance, representing an enhanced regulatory standard.

Frequently Asked Questions (FAQ)

Q: Can the ECS-384-10-47-CKM-TR with 10pF load capacitance be used in place of the 8Q-38.400MEEC-T with 9pF load capacitance?

A: Yes. The 1pF load capacitance difference is within standard oscillator circuit design tolerance. Both parts share identical frequency (38.4 MHz), frequency stability (±10ppm), ESR (80 Ohms), operating temperature range (-20°C to 70°C), and physical dimensions (1.60mm x 1.20mm). No circuit modifications are required for substitution.

Q: Are the physical dimensions identical across all three parts?

A: Yes. All three parts—TXC 8Q-38.400MEEC-T, ECS ECS-384-10-47-CKM-TR, and FTS 8Q-38.400MEEC-T—share identical length (0.063" / 1.60mm) and width (0.047" / 1.20mm) dimensions. The ECS part has a maximum seated height of 0.014" (0.35mm) compared to 0.016" (0.40mm) for the TXC and FTS parts. This minor height difference does not affect PCB footprint compatibility or assembly clearance in standard applications.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging supplies components in individual strips cut to specific lengths, suitable for small-quantity orders and manual assembly. Tape & Reel packaging supplies components on continuous reels, optimized for automated pick-and-place assembly in high-volume production. Both packaging formats contain identical components; the difference is in supply format and handling method.

Q: Do all substitute parts meet RoHS compliance?

A: Yes. The TXC and FTS parts are RoHS Compliant. The ECS part is ROHS3 Compliant, which represents an enhanced version of the RoHS standard. All three parts meet environmental compliance requirements for regulated markets.

Q: What is MSL 1 (Unlimited) moisture sensitivity rating?

A: MSL 1 indicates the lowest moisture sensitivity level, meaning the component can be stored indefinitely without special moisture control measures. No baking or desiccant storage is required prior to assembly. This rating applies to all three parts.

Q: Are frequency stability specifications identical across all parts?

A: Yes. All three parts specify ±10ppm frequency stability and ±10ppm frequency tolerance, ensuring identical timing accuracy performance in circuit applications.

Q: Can these parts be used interchangeably in production?

A: The FTS 8Q-38.400MEEC-T is a direct parametric equivalent and can be used interchangeably with no design or process changes. The ECS ECS-384-10-47-CKM-TR can be used interchangeably with the understanding that the 10pF load capacitance specification requires verification within your specific oscillator circuit design, though this variation typically falls within standard design tolerance margins.