CS20-16.000MABJ-UT Equivalent & Substitute Parts

Part Overview

The CS20-16.000MABJ-UT is a 16 MHz crystal oscillator manufactured by Citizen Finedevice Co Ltd, designed for surface mount applications requiring fundamental mode operation. This component features an 18pF load capacitance, 50 Ohms equivalent series resistance, and operates across a temperature range of -10°C to 60°C. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

CS20-16.000MABJ-UT

Citizen Finedevice Co LtdIn Stock: 1046CS20-16.000MABJ-UT Datasheet

Current PartRFQ

ABC2-16.000MHZ-4-T

Abracon LLCIn Stock: 1997ABC2-16.000MHZ-4-T Datasheet

DirectRFQ

NX1255GB-16.000000MHZ-STD-CSA-1

NDK America, Inc.In Stock: 2140NX1255GB-16.000000MHZ-STD-CSA-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CS20-16.000MABJ-UT is determined by the following critical parameters:

Primary Matching Criteria:

• Frequency: 16 MHz (exact match required)
• Operating Mode: Fundamental (exact match required)
• Package / Case: 4-SMD, No Lead (exact match required)
• Mounting Type: Surface Mount (exact match required)

Secondary Compatibility Parameters:

• Load Capacitance: 18pF (primary specification; deviations affect circuit performance)
• ESR: 50 Ohms (affects circuit stability and startup characteristics)
• Frequency Tolerance: ±30ppm (affects timing accuracy)
• Operating Temperature Range: -10°C to 60°C (minimum requirement)

Two substitute parts meet the primary matching criteria. The ABC2-16.000MHZ-4-T provides direct substitution with improved ESR characteristics. The NX1255GB-16.000000MHZ-STD-CSA-1 shares frequency and package specifications but differs in load capacitance and frequency stability parameters.

Parameter Comparison

Engineering Selection Recommendations

ABC2-16.000MHZ-4-T (Recommended Direct Substitute)

The ABC2-16.000MHZ-4-T from Abracon LLC is the primary substitute for the CS20-16.000MABJ-UT. This part maintains identical frequency, load capacitance, and package specifications. The ABC2 series offers improved ESR at 30 Ohms compared to the original 50 Ohms, resulting in lower power consumption and faster startup characteristics. The part is currently in active production status, ensuring long-term availability. ROHS3 compliance and REACH affected status indicate current regulatory alignment. Dimensional compatibility is maintained with minor length variation (11.80mm vs 11.60mm) and reduced height (2.00mm vs 2.20mm), both favorable for PCB layout.

NX1255GB-16.000000MHZ-STD-CSA-1 (Similar Frequency Match)

The NX1255GB-16.000000MHZ-STD-CSA-1 from NDK America, Inc. shares the 16 MHz frequency and 4-SMD package configuration. However, this part specifies 12pF load capacitance versus the original 18pF, requiring circuit verification before implementation. Frequency tolerance is ±50ppm, matching the original stability specification. The part is classified as obsolete. This option is suitable only when load capacitance variation is acceptable within the application circuit design.

Frequently Asked Questions (FAQ)

Q: Can the ABC2-16.000MHZ-4-T be used as a direct drop-in replacement for the CS20-16.000MABJ-UT?

A: Yes. Both parts share identical frequency (16 MHz), load capacitance (18pF), operating mode (Fundamental), and package configuration (4-SMD, No Lead). The ABC2 variant offers superior ESR characteristics (30 Ohms vs 50 Ohms) and is in active production status.

Q: What is the significance of the load capacitance difference between the main part and the NX1255GB substitute?

A: Load capacitance directly affects the crystal's resonant frequency in the circuit. The main part specifies 18pF, while the NX1255GB specifies 12pF. This 6pF difference requires circuit-level verification to confirm frequency accuracy and stability within your application's tolerance requirements.

Q: Are there dimensional compatibility concerns with the substitute parts?

A: The ABC2-16.000MHZ-4-T has a length of 11.80mm versus the original 11.60mm, a 0.20mm increase. Height is reduced to 2.00mm from 2.20mm. These variations are within typical PCB layout tolerances for surface mount components. The NX1255GB-16.000000MHZ-STD-CSA-1 has increased height (2.65mm), which may affect clearance in space-constrained applications.

Q: What is the difference between frequency stability and frequency tolerance?

A: Frequency stability (ppm) defines the maximum frequency variation over the operating temperature range. Frequency tolerance defines the initial accuracy at room temperature. The main part specifies ±50ppm stability and ±30ppm tolerance. The ABC2 substitute improves stability to ±30ppm, enhancing performance across temperature variations.

Q: Why is the ABC2-16.000MHZ-4-T preferred over the NX1255GB option?

A: The ABC2 maintains all critical electrical parameters (frequency, load capacitance, frequency tolerance) and is in active production status, ensuring availability and support. The NX1255GB differs in load capacitance and is obsolete, requiring additional circuit validation and offering limited procurement options.

Q: Does the lower ESR of the ABC2 substitute affect circuit operation?

A: Lower ESR (30 Ohms vs 50 Ohms) reduces power consumption and improves startup characteristics. This is a favorable change that does not negatively impact circuit compatibility. The oscillator circuit will experience faster amplitude buildup and lower energy dissipation.