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CS325S24000000EEQT Equivalent & Substitute Parts
Part Overview
The CS325S24000000EEQT is a 24 MHz fundamental mode crystal oscillator manufactured by Citizen Finedevice Co Ltd. This surface mount device operates at ±10ppm frequency stability with a 10pF load capacitance and 80 Ohms equivalent series resistance. The part is actively produced and available in Tape & Reel packaging, suitable for automated assembly in applications requiring precise 24 MHz timing references. Substitute parts are identified to provide alternative sourcing options when primary inventory is unavailable or when design flexibility permits component selection from qualified manufacturers.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CS325S24000000EEQT |
| Manufacturer | Citizen Finedevice Co Ltd |
| Frequency | 24 MHz |
| Frequency Stability | ±10ppm |
| Load Capacitance | 10pF |
| ESR (Equivalent Series Resistance) | 80 Ohms |
| Operating Mode | Fundamental |
| Operating Temperature Range | -10°C ~ 60°C |
| Mounting Type | Surface Mount |
| Package / Case | 4-SMD, No Lead |
| Size / Dimension | 0.126" L x 0.098" W (3.20mm x 2.50mm) |
| Height - Seated (Max) | 0.024" (0.60mm) |
| Packaging | Tape & Reel (TR) |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the CS325S24000000EEQT are qualified based on the following critical parameters that determine functional equivalence:
Primary Matching Criteria:
- Frequency: 24 MHz (exact match required)
- Frequency Stability: ±10ppm (exact match required)
- Operating Mode: Fundamental (exact match required)
- Operating Temperature Range: -10°C ~ 60°C (exact match required)
- Mounting Type: Surface Mount (exact match required)
- Package / Case: 4-SMD, No Lead (exact match required)
- Packaging: Tape & Reel (TR) (exact match required)
- Product Status: Active (exact match required)
- RoHS Status: ROHS3 Compliant (exact match required)
- Moisture Sensitivity Level (MSL): 1 (Unlimited) (exact match required)
Secondary Parameters (Allowable Variation):
- Load Capacitance: 10pF or 8pF (within design tolerance)
- ESR (Equivalent Series Resistance): 80 Ohms or 120 Ohms (within circuit design margin)
- Physical Dimensions: Minor variations permitted within SMD assembly constraints
The Raltron Electronics R2016 series parts meet all primary matching criteria and are therefore qualified as substitutes. Two variants are identified: one matching the 10pF load capacitance specification and one at 8pF load capacitance.
Parameter Comparison
| Parameter | CS325S24000000EEQT (Citizen) | R2016-24.000-10-1010-TR-NS1 (Raltron) | R2016-24.000-8-1010-TR-NS1 (Raltron) |
|---|---|---|---|
| Frequency | 24 MHz | 24 MHz | 24 MHz |
| Frequency Stability | ±10ppm | ±10ppm | ±10ppm |
| Frequency Tolerance | ±10ppm | ±10ppm | ±10ppm |
| Load Capacitance | 10pF | 10pF | 8pF |
| ESR (Equivalent Series Resistance) | 80 Ohms | 120 Ohms | 120 Ohms |
| Operating Mode | Fundamental | Fundamental | Fundamental |
| Operating Temperature Range | -10°C ~ 60°C | -10°C ~ 60°C | -10°C ~ 60°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 4-SMD, No Lead | 4-SMD, No Lead | 4-SMD, No Lead |
| Packaging | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) |
| Product Status | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Both Raltron R2016 series parts are qualified substitutes for the CS325S24000000EEQT based on matching all primary electrical and mechanical specifications. Both substitute parts maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.
R2016-24.000-10-1010-TR-NS1 provides the closest parameter match with identical 10pF load capacitance. The ESR difference of 40 Ohms (120 Ohms versus 80 Ohms) falls within acceptable circuit design margins for most 24 MHz timing applications.
R2016-24.000-8-1010-TR-NS1 offers an alternative with 8pF load capacitance. This variant is suitable for applications where the circuit design accommodates the lower load capacitance specification. The ESR specification remains at 120 Ohms.
Both Raltron parts are available in higher inventory quantities (6890 Pcs and 3349 Pcs respectively) compared to the primary part, supporting supply chain flexibility.
Frequently Asked Questions (FAQ)
Q: Can R2016-24.000-10-1010-TR-NS1 be used as a direct replacement for CS325S24000000EEQT?
A: Yes. Both parts share identical frequency (24 MHz), frequency stability (±10ppm), load capacitance (10pF), operating temperature range (-10°C ~ 60°C), package type (4-SMD, No Lead), and compliance certifications (ROHS3, MSL 1). The ESR difference of 40 Ohms is within acceptable design margins for fundamental mode crystal applications.
Q: What is the difference between the two Raltron substitute options?
A: R2016-24.000-10-1010-TR-NS1 matches the 10pF load capacitance of the original part. R2016-24.000-8-1010-TR-NS1 operates at 8pF load capacitance. Both maintain identical frequency, stability, and operating temperature specifications. Selection depends on circuit design requirements for load capacitance.
Q: Are there physical dimension differences between the main part and substitutes?
A: Yes. The CS325S24000000EEQT measures 0.126" L x 0.098" W (3.20mm x 2.50mm) with 0.024" (0.60mm) maximum seated height. The Raltron R2016 series measures 0.079" L x 0.063" W (2.00mm x 1.60mm) with 0.020" (0.50mm) maximum seated height. Both are 4-SMD, No Lead packages suitable for automated assembly, but PCB footprint design must accommodate the dimensional differences.
Q: Do all parts share the same moisture sensitivity level?
A: Yes. The CS325S24000000EEQT and both Raltron R2016 substitutes are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.
Q: Are all parts RoHS compliant?
A: Yes. The main part and both substitute parts are ROHS3 Compliant, meeting regulatory requirements for restricted substance use.
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