8Z-20.000MEEC-T Crystal Equivalent & Substitute Parts

Part Overview

The 8Z-20.000MEEC-T is a 20 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION. This surface mount device is designed for applications requiring precise frequency generation with ±10ppm stability across the -20°C to 70°C operating temperature range. The component is RoHS Compliant and carries an MSL rating of 1 (Unlimited), indicating minimal moisture sensitivity. As an active product with 980 pieces in stock, substitute parts may be required due to supply chain constraints, design optimization, or application-specific performance requirements.

Substiute Parts

8Z-20.000MEEC-T

TXC CORPORATIONIn Stock: 10558Z-20.000MEEC-T Datasheet

Current PartRFQ

ABM11W-20.0000MHZ-8-B1U-T3

Abracon LLCIn Stock: 3406ABM11W-20.0000MHZ-8-B1U-T3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 8Z-20.000MEEC-T is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 20.0000 MHz (exact match required)
• Frequency Stability: ±10 ppm (tolerance specification)
• Operating Mode: Fundamental
• Operating Temperature Range: -20°C to 70°C (minimum coverage)
• Package / Case: 4-SMD, No Lead (mechanical compatibility)
• Mounting Type: Surface Mount

Allowable Variation Parameters:

• Load Capacitance: 8–9 pF (minor variation acceptable within circuit design margins)
• ESR: 100–120 Ohms (within acceptable impedance range for 20 MHz applications)
• Physical Dimensions: Variations within SMD footprint compatibility
• Height: Up to 0.55 mm maximum seated height

The ABM11W-20.0000MHZ-8-B1U-T3 meets all mandatory matching criteria and falls within allowable variation ranges for load capacitance and ESR, qualifying it as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: 8Z-20.000MEEC-T

The 8Z-20.000MEEC-T remains the primary component choice when available. It is an active product with established supply (980 pieces in stock), carries RoHS Compliance certification, and features an MSL rating of 1 (Unlimited), indicating superior moisture tolerance for storage and handling.

Substitute Selection: ABM11W-20.0000MHZ-8-B1U-T3

The ABM11W-20.0000MHZ-8-B1U-T3 from Abracon LLC qualifies as a direct substitute when the primary part is unavailable. It maintains identical frequency (20.0000 MHz) and frequency stability (±10 ppm) specifications. The load capacitance difference (8 pF vs. 9 pF) and ESR variation (120 Ohms vs. 100 Ohms) remain within acceptable engineering tolerances for 20 MHz crystal applications. The substitute is ROHS3 Compliant and features a smaller physical footprint (2.00 x 1.60 mm vs. 2.50 x 2.00 mm), which may provide layout advantages. Higher inventory availability (3355 pieces) supports supply chain reliability.

Both parts operate across the identical temperature range (-20°C to 70°C) and utilize the same 4-SMD, No Lead package configuration, ensuring mechanical and electrical compatibility in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can the ABM11W-20.0000MHZ-8-B1U-T3 be used as a direct replacement for the 8Z-20.000MEEC-T without circuit modification?

A: Yes. Both crystals operate at 20.0000 MHz with ±10 ppm stability and share identical package geometry (4-SMD, No Lead). The 1 pF load capacitance difference and 20 Ohm ESR variation fall within standard design tolerances for 20 MHz applications. No circuit redesign is required.

Q: What is the significance of the load capacitance difference between these parts?

A: Load capacitance (9 pF vs. 8 pF) affects the crystal's resonant frequency in the circuit. The 1 pF difference is minor and typically compensated by standard oscillator circuit design practices. Both values are within the acceptable range for 20 MHz fundamental mode crystals.

Q: How does the ESR difference impact circuit performance?

A: ESR (Equivalent Series Resistance) of 100 Ohms versus 120 Ohms represents a 20% variation. For 20 MHz applications, this difference is within acceptable limits and does not significantly affect startup time, power consumption, or frequency stability in standard oscillator circuits.

Q: Are there physical footprint compatibility concerns?

A: The ABM11W substitute features a smaller footprint (2.00 x 1.60 mm vs. 2.50 x 2.00 mm) and lower height (0.50 mm vs. 0.55 mm). Both use identical 4-SMD, No Lead package configuration. The smaller dimensions may provide layout advantages and are fully compatible with standard SMD assembly processes.

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

A: Both certifications indicate compliance with Restriction of Hazardous Substances directives. ROHS3 represents the current regulatory standard. Both parts meet environmental and safety requirements for electronic component use.

Q: Which part should be selected for new designs?

A: For new designs, either part is acceptable based on availability and supply chain considerations. The ABM11W-20.0000MHZ-8-B1U-T3 offers higher inventory availability (3355 vs. 980 pieces) and a smaller physical footprint, which may support design optimization and supply chain continuity.