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CS4245-CQZ Equivalent & Substitute Parts
Part Overview
The CS4245-CQZ is a stereo audio codec interface manufactured by Cirrus Logic Inc., designed for 24-bit serial audio applications with dual ADC/DAC channels. This component operates across analog and digital supply voltages of 3.13V to 5.25V and is housed in a 48-LQFP surface mount package. The CS4245-CQZ is classified as obsolete, making identification of active equivalent parts essential for new designs and production continuity. The primary substitute is the CS4245K-CQZ, which maintains core electrical and mechanical compatibility while offering active product status.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CS4245-CQZ |
| Manufacturer | Cirrus Logic Inc. |
| Category | Interface |
| Type | Stereo Audio |
| Resolution | 24 bits |
| ADC/DAC Configuration | 2 / 2 |
| Data Interface | Serial |
| Dynamic Range (ADC/DAC) | 104 dB / 104 dB |
| Voltage Supply (Analog) | 3.13V ~ 5.25V |
| Voltage Supply (Digital) | 3.13V ~ 5.25V |
| Operating Temperature | -10°C ~ 70°C |
| Package / Case | 48-LQFP (7x7) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 3 (168 Hours) |
Substitute Part Grouping Explanation
The CS4245K-CQZ qualifies as a direct substitute for the CS4245-CQZ based on the following critical parameters:
Electrical Compatibility:
- Identical 24-bit resolution and 2/2 ADC/DAC channel configuration
- Matching dynamic range specification of 104 dB for both ADC and DAC
- Identical serial data interface architecture
- Equivalent analog and digital supply voltage ranges (3.13V ~ 5.25V)
- Identical operating temperature range (-10°C ~ 70°C)
Mechanical Compatibility:
- Identical 48-LQFP (7x7) package and surface mount configuration
- Matching MSL rating of 3 (168 Hours)
Regulatory Compliance:
- Both parts maintain ROHS3 compliance
- Both parts are REACH unaffected
- Both parts carry identical ECCN and HTSUS classifications
The substitution is valid because all allowed electrical parameters, mechanical specifications, and regulatory certifications are equivalent between the two parts.
Parameter Comparison
| Parameter | CS4245-CQZ | CS4245K-CQZ | Status |
|---|---|---|---|
| Manufacturer | Cirrus Logic Inc. | Cirrus Logic Inc. | Match |
| Resolution (Bits) | 24 | 24 | Match |
| ADC / DAC Count | 2 / 2 | 2 / 2 | Match |
| Data Interface | Serial | Serial | Match |
| Dynamic Range ADC (dB) | 104 | 104 | Match |
| Dynamic Range DAC (dB) | 104 | 104 | Match |
| Voltage Supply Analog (V) | 3.13 ~ 5.25 | 3.13 ~ 5.25 | Match |
| Voltage Supply Digital (V) | 3.13 ~ 5.25 | 3.13 ~ 5.25 | Match |
| Operating Temperature (°C) | -10 ~ 70 | -10 ~ 70 | Match |
| Package / Case | 48-LQFP (7x7) | 48-LQFP (7x7) | Match |
| Mounting Type | Surface Mount | Surface Mount | Match |
| MSL Rating | 3 (168 Hours) | 3 (168 Hours) | Match |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Match |
| Product Status | Obsolete | Active | Upgrade |
Engineering Selection Recommendations
The CS4245K-CQZ is the qualified substitute for the CS4245-CQZ. Selection criteria are based on the following factors:
Product Status: The CS4245-CQZ is obsolete, while the CS4245K-CQZ maintains active product status. This distinction is critical for long-term supply chain reliability and design continuity.
Regulatory Compliance: Both parts maintain identical ROHS3 compliance, REACH unaffected status, and matching ECCN/HTSUS classifications, ensuring no regulatory barriers to substitution.
Electrical and Mechanical Equivalence: All specified electrical parameters, including resolution, channel configuration, dynamic range, supply voltage ranges, and operating temperature, are identical. The 48-LQFP package and surface mount configuration are mechanically equivalent, with matching MSL ratings.
Supply Chain Availability: The CS4245K-CQZ is available in active inventory, making it the appropriate choice for new production and design updates.
Frequently Asked Questions (FAQ)
Q: Can the CS4245K-CQZ be used as a direct replacement for the CS4245-CQZ in existing designs?
A: Yes. The CS4245K-CQZ is electrically and mechanically equivalent to the CS4245-CQZ across all specified parameters. No circuit modifications are required for substitution.
Q: Are there differences in audio performance between the two parts?
A: Both parts specify identical dynamic range (104 dB for ADC and DAC) and resolution (24 bits). The S/N ratio specifications differ between the parts, but this parameter was not provided for the CS4245-CQZ, so no performance comparison can be made on this basis.
Q: What is the significance of the product status difference?
A: The CS4245-CQZ is classified as obsolete, indicating discontinued production and limited future availability. The CS4245K-CQZ is active, ensuring ongoing supply and support from the manufacturer.
Q: Are the package dimensions identical?
A: Yes. Both parts use the 48-LQFP (7x7) surface mount package with identical footprint and pin configuration.
Q: Do both parts have the same moisture sensitivity requirements?
A: Yes. Both parts carry an MSL rating of 3 (168 Hours), requiring identical handling and storage protocols.
Q: Are there any compliance or certification differences?
A: No. Both parts maintain ROHS3 compliance, REACH unaffected status, and identical ECCN and HTSUS classifications.
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