ZTT-20.00MX Ceramic Resonator Equivalent & Substitute Parts

Part Overview

The ZTT-20.00MX is a 20 MHz ceramic resonator with built-in 30 pF capacitor manufactured by ECS Inc. This through-hole component operates across -20°C to 80°C with ±0.3% frequency stability and 30 Ohms impedance. The product is currently obsolete, making identification of compatible substitute components essential for legacy system maintenance, repair, and redesign applications.

Substiute Parts

ZTT-20.00MX

ECS Inc.In Stock: 1137ZTT-20.00MX Datasheet

Current PartRFQ

CSTLS20M0X53-B0

Murata ElectronicsIn Stock: 6877CSTLS20M0X53-B0 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ZTT-20.00MX is determined by the following critical parameters:

• Frequency Match: 20 MHz (exact match required)
• Mounting Configuration: Through-hole radial package with 2.50mm pitch (mechanical compatibility)
• Operating Temperature Range: -20°C to 80°C minimum (thermal envelope compatibility)
• Built-in Capacitor Architecture: Integrated capacitor design (functional equivalence)
• Regulatory Compliance: ROHS3 compliance (environmental and supply chain requirements)

The CSTLS20M0X53-B0 from Murata Electronics qualifies as a substitute based on matching frequency, mounting type, package pitch, temperature range, and regulatory compliance. Variations in built-in capacitance (15 pF vs. 30 pF), frequency stability (±0.2% vs. ±0.3%), and impedance (50 Ohms vs. 30 Ohms) represent acceptable parameter deviations within the scope of ceramic resonator substitution, provided circuit design accommodates these differences.

Parameter Comparison

Engineering Selection Recommendations

The CSTLS20M0X53-B0 is the qualified substitute for the ZTT-20.00MX based on the following factors:

• Frequency Alignment: Both components operate at 20 MHz, ensuring direct functional compatibility in clock and timing circuits.
• Mechanical Compatibility: Identical through-hole radial package configuration with 2.50mm lead pitch permits direct board-level substitution without layout modification.
• Thermal Envelope: Matching -20°C to 80°C operating temperature range ensures equivalent performance across specified environmental conditions.
• Regulatory Compliance: Both components meet ROHS3 requirements, supporting supply chain continuity and environmental compliance mandates.
• Product Availability: The CSTLS20M0X53-B0 maintains active production status with established inventory, addressing the obsolescence of the ZTT-20.00MX.

Circuit design review is required to evaluate the impact of capacitance reduction (30 pF to 15 pF) and impedance increase (30 Ohms to 50 Ohms) on oscillator performance and frequency accuracy.

Frequently Asked Questions (FAQ)

Q: Can the CSTLS20M0X53-B0 be used as a direct drop-in replacement for the ZTT-20.00MX?

A: Mechanical and electrical compatibility is established through matching frequency, package configuration, and operating temperature range. However, the reduced built-in capacitance (15 pF vs. 30 pF) and increased impedance (50 Ohms vs. 30 Ohms) may affect oscillator circuit behavior. Circuit simulation or prototype testing is necessary to confirm performance within application-specific tolerance requirements.

Q: What are the key differences between these two ceramic resonators?

A: The primary differences are built-in capacitance (30 pF vs. 15 pF), frequency stability (±0.3% vs. ±0.2%), impedance (30 Ohms vs. 50 Ohms), and physical dimensions. The CSTLS20M0X53-B0 is smaller and offers superior frequency stability. Both maintain identical frequency, temperature range, and package pitch.

Q: Why is the CSTLS20M0X53-B0 considered a substitute despite capacitance differences?

A: Ceramic resonators with different built-in capacitance values can function as substitutes when the oscillator circuit design permits external capacitance adjustment or when the application tolerance accommodates the parameter variation. The matching frequency, mounting type, and thermal range establish functional equivalence at the component level.

Q: Are there any compliance or supply chain advantages to using the CSTLS20M0X53-B0?

A: Yes. The CSTLS20M0X53-B0 maintains active production status with established supply chain availability, whereas the ZTT-20.00MX is obsolete. Both components are ROHS3 compliant. The Murata component also carries REACH compliance documentation, supporting extended regulatory requirements in certain markets.

Q: What should be evaluated before implementing this substitution?

A: Evaluate oscillator circuit response to the 15 pF capacitance value, confirm frequency accuracy remains within application tolerance, and assess impedance matching with the circuit load. Physical board layout compatibility is confirmed through identical package pitch and through-hole configuration.