8Q-37.400MDDV-T Equivalent & Substitute Parts

Part Overview

The TXC CORPORATION 8Q-37.400MDDV-T is a 37.4 MHz fundamental mode crystal oscillator in 4-SMD, No Lead surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent substitute components that maintain electrical and mechanical compatibility with existing circuit designs. The original part specification includes 8pF load capacitance, 80 Ohms ESR, and ±20ppm frequency stability across the -20°C to 70°C operating temperature range.

Substiute Parts

8Q-37.400MDDV-T

TXC CORPORATIONIn Stock: 10618Q-37.400MDDV-T Datasheet

Current PartRFQ

ABM13W-37.4000MHZ-6-B2X-T5

Abracon LLCIn Stock: 1022ABM13W-37.4000MHZ-6-B2X-T5 Datasheet

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ABM13W-37.4000MHZ-7-B2X-T5

Abracon LLCIn Stock: 1032ABM13W-37.4000MHZ-7-B2X-T5 Datasheet

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ABM13W-37.4000MHZ-8-B2X-T5

Abracon LLCIn Stock: 938ABM13W-37.4000MHZ-8-B2X-T5 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 8Q-37.400MDDV-T is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 37.4 MHz (exact match required)
• Frequency Stability: ±20ppm (exact match required)
• Operating Mode: Fundamental (exact match required)
• Operating Temperature Range: -20°C to 70°C (exact match required)
• Package / Case: 4-SMD, No Lead (exact match required)
• Mounting Type: Surface Mount (exact match required)

Allowable Variation Parameters:

• Load Capacitance: 6pF, 7pF, or 8pF (circuit design determines acceptable range)
• ESR (Equivalent Series Resistance): 50 Ohms or 80 Ohms (lower ESR acceptable for circuit compatibility)
• Physical Dimensions: Smaller dimensions acceptable within PCB layout constraints
• RoHS Status: ROHS3 Compliant acceptable as equivalent to RoHS Compliant
• MSL: Not Applicable acceptable as equivalent to MSL 1

The Abracon LLC ABM13W series crystals meet all mandatory parameters and provide substitute options across three load capacitance values (6pF, 7pF, 8pF) with lower ESR specifications.

Parameter Comparison

Engineering Selection Recommendations

ABM13W-37.4000MHZ-8-B2X-T5 (Primary Substitute)

This part is the direct equivalent for applications requiring 8pF load capacitance. It maintains identical frequency, frequency stability, operating mode, and temperature range specifications. The lower ESR (50 Ohms versus 80 Ohms) provides improved circuit performance characteristics. The part is currently active in production with ROHS3 compliance certification. Physical dimensions are smaller, reducing PCB footprint requirements while maintaining full electrical compatibility.

ABM13W-37.4000MHZ-7-B2X-T5 (Secondary Substitute)

This part is suitable for circuit designs tolerant of 7pF load capacitance. All frequency and stability parameters remain identical to the original specification. Selection of this part requires circuit design verification that the load capacitance specification is compatible with the application oscillator circuit.

ABM13W-37.4000MHZ-6-B2X-T5 (Tertiary Substitute)

This part is suitable for circuit designs tolerant of 6pF load capacitance. All frequency and stability parameters remain identical to the original specification. Selection of this part requires circuit design verification that the load capacitance specification is compatible with the application oscillator circuit.

All three Abracon substitutes are currently in active production status, ensuring long-term availability and supply chain continuity compared to the discontinued TXC part.

Frequently Asked Questions (FAQ)

Q: Can the ABM13W-37.4000MHZ-8-B2X-T5 be used as a direct replacement for the 8Q-37.400MDDV-T?

A: Yes. Both parts share identical frequency (37.4 MHz), frequency stability (±20ppm), operating mode (Fundamental), operating temperature range (-20°C to 70°C), and package type (4-SMD, No Lead). The ABM13W part features lower ESR (50 Ohms versus 80 Ohms), which is compatible with standard oscillator circuit designs. Physical dimensions are smaller, which is advantageous for PCB layout.

Q: What is the difference between the three Abracon substitute options?

A: The three ABM13W parts differ only in load capacitance specification: 6pF, 7pF, or 8pF. All other electrical parameters (frequency, stability, ESR, temperature range) and physical characteristics (package, mounting type) are identical. Selection depends on the load capacitance requirement of the specific oscillator circuit design.

Q: Does load capacitance affect circuit compatibility?

A: Load capacitance is a critical parameter that must match the oscillator circuit design specification. The original 8Q-37.400MDDV-T specifies 8pF load capacitance. If the circuit design is verified to accept 6pF or 7pF load capacitance, the corresponding ABM13W parts are suitable. If the circuit design requires exactly 8pF, the ABM13W-37.4000MHZ-8-B2X-T5 is the appropriate selection.

Q: Are the physical dimension differences between the main part and substitutes significant?

A: The ABM13W parts are smaller (1.20mm x 1.00mm versus 1.60mm x 1.20mm) and lower profile (0.33mm versus 0.40mm maximum height). These dimensions are smaller, which reduces PCB footprint and is compatible with standard surface mount assembly processes. No design modifications are required for PCB layout.

Q: What is the difference between RoHS Compliant and ROHS3 Compliant?

A: Both certifications indicate compliance with Restriction of Hazardous Substances regulations. ROHS3 represents the current version of the RoHS directive. Both certifications are equivalent for component selection purposes.

Q: Is the lower ESR of the Abracon parts (50 Ohms versus 80 Ohms) a concern?

A: No. Lower ESR is generally beneficial in crystal oscillator circuits, as it reduces power dissipation and improves frequency stability. Standard oscillator circuit designs accommodate ESR values in this range without modification.

Q: What is the inventory status of these substitute parts?

A: The ABM13W-37.4000MHZ-8-B2X-T5 has 846 pieces in stock. The ABM13W-37.4000MHZ-7-B2X-T5 has 926 pieces in stock. The ABM13W-37.4000MHZ-6-B2X-T5 has 988 pieces in stock. All three parts are in active production status, ensuring continued availability.