CS20-12.000MABJ-UT Equivalent & Substitute Parts

Part Overview

The CS20-12.000MABJ-UT is a 12 MHz fundamental mode crystal oscillator manufactured by Citizen Finedevice Co Ltd, designed for surface mount applications in 4-SMD, No Lead package configuration. This part operates at ±30ppm frequency tolerance with 18pF load capacitance and 80 Ohms equivalent series resistance (ESR). The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

CS20-12.000MABJ-UT

Citizen Finedevice Co LtdIn Stock: 772CS20-12.000MABJ-UT Datasheet

Current PartRFQ

ABC2-12.000MHZ-4-T

Abracon LLCIn Stock: 4039ABC2-12.000MHZ-4-T Datasheet

DirectRFQ

ECS-120-20-19A-TR

ECS Inc.In Stock: 1338ECS-120-20-19A-TR Datasheet

SimilarRFQ

NX1255GB-12.000000MHZ

NDK America, Inc.In Stock: 3142NX1255GB-12.000000MHZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CS20-12.000MABJ-UT is determined by the following critical parameters: frequency (12 MHz), frequency tolerance (±30ppm), load capacitance (18pF), operating mode (Fundamental), and surface mount package configuration. Parts meeting these core electrical specifications are classified as direct equivalents. Parts with variations in load capacitance, ESR, or package configuration are classified as similar alternatives and require circuit validation.

Direct Equivalent Criteria:

• Frequency: 12 MHz
• Frequency Tolerance: ±30ppm
• Load Capacitance: 18pF
• Operating Mode: Fundamental
• Mounting Type: Surface Mount

Similar Alternative Criteria:

• Frequency: 12 MHz
• Frequency Tolerance: ±30ppm or ±50ppm
• Load Capacitance: 12pF or 20pF (within acceptable circuit margin)
• Operating Mode: Fundamental
• Mounting Type: Surface Mount

Parameter Comparison

Engineering Selection Recommendations

ABC2-12.000MHZ-4-T (Abracon LLC) is the primary direct equivalent for the CS20-12.000MABJ-UT. This part maintains identical frequency (12 MHz), frequency tolerance (±30ppm), load capacitance (18pF), and 4-SMD package configuration. The ABC2-12.000MHZ-4-T features lower ESR (35 Ohms versus 80 Ohms), which may improve circuit performance characteristics. The part is currently active with ROHS3 compliance and higher inventory availability (3944 units). Dimensional compatibility is confirmed with minimal variation in length (11.80mm versus 11.60mm) and identical width and height specifications within acceptable PCB layout tolerances.

ECS-120-20-19A-TR (ECS Inc.) is classified as a similar alternative with the following considerations: load capacitance is specified at 20pF (versus 18pF), and package configuration is 2-SMD, No Lead (versus 4-SMD, No Lead). ESR matches the main part at 80 Ohms. This part is active with ROHS3 compliance and extended operating temperature range (-10°C ~ 70°C). The 2-SMD package and 20pF load capacitance require circuit validation for compatibility.

NX1255GB-12.000000MHZ (NDK America, Inc.) is classified as a similar alternative with the following considerations: load capacitance is specified at 12pF (versus 18pF), and frequency tolerance is ±50ppm (versus ±30ppm). ESR is 50 Ohms. This part is obsolete with RoHS compliance and extended operating temperature range (-10°C ~ 70°C). The 12pF load capacitance and relaxed frequency tolerance require circuit validation for compatibility.

Frequently Asked Questions (FAQ)

Q: Can ABC2-12.000MHZ-4-T be used as a direct replacement for CS20-12.000MABJ-UT?

A: Yes. The ABC2-12.000MHZ-4-T meets all critical electrical parameters: 12 MHz frequency, ±30ppm frequency tolerance, 18pF load capacitance, and 4-SMD, No Lead package. The lower ESR (35 Ohms) may improve circuit performance. Dimensional compatibility is confirmed within standard PCB layout tolerances.

Q: What are the key differences between the direct equivalent and similar alternatives?

A: The direct equivalent (ABC2-12.000MHZ-4-T) maintains identical load capacitance (18pF) and package configuration (4-SMD). Similar alternatives vary in load capacitance (ECS-120-20-19A-TR at 20pF; NX1255GB-12.000000MHZ at 12pF) and/or package configuration (ECS-120-20-19A-TR uses 2-SMD). These variations require circuit validation.

Q: Does the 2-SMD package of ECS-120-20-19A-TR affect PCB layout compatibility?

A: Yes. The 2-SMD package differs from the 4-SMD configuration of the main part and direct equivalent. PCB footprint and layout must be evaluated for compatibility. Additionally, the 20pF load capacitance (versus 18pF) may require oscillator circuit tuning adjustments.

Q: What is the impact of load capacitance variation in substitute parts?

A: Load capacitance directly affects oscillator frequency and circuit stability. The main part specifies 18pF. The ECS-120-20-19A-TR (20pF) and NX1255GB-12.000000MHZ (12pF) represent deviations that may require circuit compensation or tuning. Circuit validation is necessary before implementation.

Q: Are all substitute parts currently available?

A: ABC2-12.000MHZ-4-T and ECS-120-20-19A-TR are active products with current inventory. NX1255GB-12.000000MHZ is obsolete. For new designs, ABC2-12.000MHZ-4-T is recommended as the primary source.

Q: What compliance certifications should be considered for regulatory requirements?

A: ABC2-12.000MHZ-4-T and ECS-120-20-19A-TR are ROHS3 compliant. The main part (CS20-12.000MABJ-UT) and ECS-120-20-19A-TR are REACH Unaffected. ABC2-12.000MHZ-4-T is REACH Affected. Regulatory requirements for your application determine which certification status is applicable.