CS4340-DSZ Equivalent & Substitute Parts

Part Overview

The CS4340-DSZ is a 24-bit audio digital-to-analog converter (DAC) manufactured by Cirrus Logic Inc., designed for audio applications requiring 96 kHz sampling rate with SPI interface connectivity. The device operates from single supply voltages of 2.7V to 3.6V or 5V and is housed in a 16-SOIC surface mount package.

The CS4340-DSZ carries an Obsolete product status, indicating it is no longer in active production. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing manufacturing or repair operations for systems utilizing this DAC.

Substiute Parts

CS4340-DSZ

Cirrus Logic Inc.In Stock: 887CS4340-DSZ Datasheet

Current PartRFQ

CS4345-CZZ

Cirrus Logic Inc.In Stock: 5141CS4345-CZZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CS4340-DSZ are identified based on the following core substitution criteria:

• Manufacturer alignment: Same manufacturer (Cirrus Logic Inc.) ensures design compatibility and consistent device behavior
• Functional category: Audio DAC classification with identical channel count (2 channels) and resolution (24 bits)
• Interface compatibility: SPI data interface maintained across substitute parts
• Supply voltage overlap: Substitute parts must support at least one common operating voltage range
• Package form factor: Surface mount technology maintained for PCB integration compatibility
• Series continuity: Popguard® series designation preserved

The CS4345-CZZ meets these substitution criteria while offering enhanced sampling rate capability (192 kHz versus 96 kHz) and operates within overlapping voltage supply ranges (3V ~ 3.47V, 5V).

Parameter Comparison

Engineering Selection Recommendations

The CS4345-CZZ is identified as the manufacturer-recommended substitute for the CS4340-DSZ. Both devices maintain core functional equivalence through identical 24-bit resolution, 2-channel configuration, and SPI interface protocol.

Key considerations for substitution:

• The CS4345-CZZ supports an extended sampling rate of 192 kHz, providing enhanced performance capability compared to the 96 kHz specification of the CS4340-DSZ
• Operating temperature range differs: CS4345-CZZ operates from -10°C to 70°C versus -40°C to 85°C for the CS4340-DSZ. Applications requiring extended low-temperature operation below -10°C are not suitable for the substitute
• Supply voltage range for CS4345-CZZ begins at 3V (versus 2.7V for the main part). Designs operating at 2.7V to 2.99V require verification of compatibility
• Package form factor changes from 16-SOIC to 10-TFSOP/10-MSOP, requiring PCB layout modification and potential footprint redesign
• Both devices maintain identical Moisture Sensitivity Level (MSL 2) and REACH compliance status
• CS4345-CZZ carries Last Time Buy status, indicating limited future availability

Frequently Asked Questions (FAQ)

Q: Can the CS4345-CZZ directly replace the CS4340-DSZ without PCB modification?

A: No. The CS4345-CZZ uses a 10-TFSOP/10-MSOP package (0.118", 3.00mm width) compared to the 16-SOIC package (0.154", 3.90mm width) of the CS4340-DSZ. PCB footprint redesign and layout modification are required.

Q: Are there voltage supply compatibility concerns?

A: The CS4345-CZZ minimum supply voltage is 3V, while the CS4340-DSZ operates from 2.7V. Designs operating at 2.7V to 2.99V require circuit verification before substitution. Both devices support 5V operation.

Q: What is the impact of the different operating temperature ranges?

A: The CS4340-DSZ operates from -40°C to 85°C, while the CS4345-CZZ operates from -10°C to 70°C. Applications requiring operation below -10°C or above 70°C cannot use the CS4345-CZZ as a substitute.

Q: Does the higher sampling rate of the CS4345-CZZ affect compatibility?

A: The CS4345-CZZ supports 192 kHz sampling rate versus 96 kHz for the CS4340-DSZ. This represents enhanced capability and does not create incompatibility. Designs operating at 96 kHz or lower will function correctly with the substitute.

Q: What is the significance of the Last Time Buy status for the CS4345-CZZ?

A: Last Time Buy status indicates limited production availability. Long-term design continuity may require identification of additional alternatives or early procurement planning.

Q: Are there differences in interface protocol or pin configuration?

A: Both devices use SPI interface protocol. Pin configuration differences exist due to package form factor change. Detailed datasheet comparison and schematic review are necessary for implementation.