CS10-12.000MBBJ Equivalent & Substitute Parts

Part Overview

The CS10-12.000MBBJ is a 12 MHz fundamental mode crystal oscillator manufactured by Citizen Finedevice Co Ltd, designed for surface mount applications with 18pF load capacitance and 70 Ohms equivalent series resistance. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing production and maintenance applications. The part operates across a temperature range of -10°C to 60°C with ±50ppm frequency stability and is packaged in a 2-SMD, no-lead configuration measuring 6.00mm × 4.60mm.

Substiute Parts

CS10-12.000MBBJ

Citizen Finedevice Co LtdIn Stock: 1074CS10-12.000MBBJ Datasheet

Current PartRFQ

ECS-120-18-23A-EN-TR

ECS Inc.In Stock: 20942ECS-120-18-23A-EN-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS10-12.000MBBJ is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 12 MHz
• Load Capacitance: 18pF
• Package / Case: 2-SMD, No Lead
• Mounting Type: Surface Mount
• Physical Dimensions: 6.00mm × 4.60mm (length × width)

Allowable Variation Parameters:

• Frequency Stability: The main part specifies ±50ppm; substitute parts with equal or tighter stability (lower ppm value) are acceptable
• ESR: The main part specifies 70 Ohms; substitute parts with ESR within ±15% tolerance are acceptable
• Operating Temperature Range: Substitute parts with equal or wider temperature ranges are acceptable
• Height - Seated: Minor variations within manufacturing tolerances are acceptable

The ECS-120-18-23A-EN-TR meets all mandatory matching parameters and demonstrates acceptable variation in allowable parameters, qualifying it as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The ECS-120-18-23A-EN-TR is a qualified substitute for the CS10-12.000MBBJ based on the following factors:

Product Status: The CS10-12.000MBBJ is obsolete, while the ECS-120-18-23A-EN-TR is active and in current production with 20,837 units available in inventory, ensuring long-term supply continuity.

Regulatory Compliance: Both parts maintain identical REACH and ECCN classifications (REACH Unaffected, EAR99), and both carry the same HTSUS code (8541.60.0050), indicating equivalent regulatory standing.

Electrical Compatibility: The substitute part meets all mandatory electrical parameters. The ESR variation of 10 Ohms (70 Ohms to 80 Ohms) represents a 14.3% increase, which remains within acceptable tolerance for crystal oscillator applications. The substitute's tighter frequency tolerance (±30ppm versus ±50ppm) provides improved frequency accuracy.

Thermal Performance: The substitute part operates across a wider temperature range (-40°C to 85°C versus -10°C to 60°C), providing enhanced performance in extended temperature environments.

Physical Compatibility: Identical package dimensions, mounting type, and MSL rating ensure direct mechanical and environmental compatibility.

Frequently Asked Questions (FAQ)

Q: Can the ECS-120-18-23A-EN-TR be used as a direct replacement for the CS10-12.000MBBJ?

A: Yes. Both parts share identical frequency (12 MHz), load capacitance (18pF), package configuration (2-SMD, no lead), and physical dimensions (6.00mm × 4.60mm). The ESR difference of 10 Ohms falls within acceptable tolerance for crystal oscillator circuit design.

Q: What is the significance of the frequency tolerance difference (±50ppm vs ±30ppm)?

A: Frequency tolerance defines the initial accuracy of the crystal at room temperature. The substitute part's ±30ppm tolerance is tighter than the main part's ±50ppm, meaning the ECS-120-18-23A-EN-TR will have better initial frequency accuracy. This is advantageous for applications requiring precise timing.

Q: Does the 10 Ohm ESR difference affect circuit performance?

A: ESR (Equivalent Series Resistance) affects the crystal's impedance and power consumption in oscillator circuits. The 10 Ohm increase (70 Ohms to 80 Ohms) represents a 14.3% variation. For most standard crystal oscillator applications, this variation is within acceptable design margins. Circuit designers should verify ESR compatibility with their specific oscillator IC specifications.

Q: Why does the substitute part have a wider operating temperature range?

A: The ECS-120-18-23A-EN-TR operates from -40°C to 85°C, compared to the main part's -10°C to 60°C range. This wider range indicates the substitute part is designed for industrial and extended-temperature applications. If your application operates within the original -10°C to 60°C range, the substitute remains fully compatible.

Q: Are there any packaging or handling differences?

A: Both parts are packaged as 2-SMD, no-lead components with identical MSL rating of 1 (Unlimited). The substitute is available in Cut Tape (CT) and Digi-Reel packaging options, while the main part's original packaging is not specified. Both parts have identical moisture sensitivity requirements.

Q: What is the inventory status for each part?

A: The CS10-12.000MBBJ (obsolete) has 1,020 units in stock. The ECS-120-18-23A-EN-TR (active) has 20,837 units in stock, providing significantly better long-term availability for production and maintenance applications.