CS4350-DZZ Equivalent & Substitute Parts

Part Overview

The CS4350-DZZ is a 24-bit audio digital-to-analog converter (DAC) manufactured by Cirrus Logic Inc., designed for high-fidelity audio applications with 192 kHz sampling rate capability. This component operates as a single-supply device with SPI interface connectivity and is housed in a 24-TSSOP surface-mount package.

The CS4350-DZZ has reached Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary for ongoing design support, production continuity, and long-term system maintenance where this component is currently deployed.

Key Parameters

Parameter	CS4350-DZZ
Resolution	24 bits
Sampling Rate	192 kHz
Data Interface	SPI
Number of Channels	2
Voltage Supply Source	Single Supply
Operating Temperature Range	-40°C to 105°C
Package Type	24-TSSOP
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the CS4350-DZZ are identified based on the following core electrical and mechanical parameters:

24-bit resolution and 192 kHz sampling rate capability (audio DAC functional equivalence)
2-channel stereo output configuration
Surface-mount TSSOP package family
ROHS3 compliance and equivalent moisture sensitivity handling
Data interface compatibility or functional equivalence within audio DAC applications

The three substitute parts listed below meet these criteria with variations in interface protocol, package pin count, and supply voltage specifications. Selection depends on specific application requirements regarding data interface type and thermal operating range.

Parameter Comparison

Parameter	CS4350-DZZ	CS4398K-CZZ	WM8523GEDT	WM8524CGEDT
Manufacturer	Cirrus Logic Inc.	Cirrus Logic Inc.	Cirrus Logic Inc.	Cirrus Logic Inc.
Resolution (Bits)	24	24	24	24
Sampling Rate (Per Second)	192k	192k	192k	192k
Number of Channels	2	2	2	2
Data Interface	SPI	I2C, SPI	I2C, SPI	I2S
Voltage Supply Source	Single Supply	Analog and Digital	Single Supply	Single Supply
Operating Temperature Range	-40°C to 105°C	-10°C to 70°C	-40°C to 85°C	-40°C to 85°C
Package / Case	24-TSSOP	28-TSSOP	20-TSSOP	16-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)
Product Status	Last Time Buy	Active	Active	Active

Engineering Selection Recommendations

All substitute parts maintain ROHS3 compliance and equivalent environmental certifications (REACH Unaffected, ECCN EAR99, HTSUS 8542.39.0001) to the CS4350-DZZ.

CS4398K-CZZ is the manufacturer-recommended primary substitute. It provides dual-interface capability (I2C and SPI), supporting existing SPI implementations while enabling I2C-based designs. The 28-TSSOP package accommodates additional control pins. Operating temperature range (-10°C to 70°C) is narrower than the original part; applications requiring extended low-temperature operation below -10°C require thermal analysis.

WM8523GEDT offers improved moisture handling (MSL 1 vs. MSL 3) and extended low-temperature operation (-40°C). The 20-TSSOP package reduces board footprint. Dual-interface support (I2C and SPI) maintains protocol flexibility. Supply voltage specification (2.97V to 3.63V) differs from the original single-supply design; voltage regulation compatibility must be verified.

WM8524CGEDT provides the smallest package footprint (16-TSSOP) and highest inventory availability (39,200 units). I2S interface differs from the original SPI specification; this part is suitable only for designs where I2S protocol is compatible or where interface conversion is implemented. MSL 1 rating and -40°C to 85°C operating range support demanding environmental conditions.

Frequently Asked Questions (FAQ)

Q: Can CS4398K-CZZ directly replace CS4350-DZZ without PCB modification?

A: CS4398K-CZZ uses a 28-TSSOP package versus the original 24-TSSOP. Pin count and layout differ; PCB footprint modification is required. Both parts support SPI interface, but pinout verification against datasheets is mandatory before implementation.

Q: What is the primary difference between WM8523GEDT and WM8524CGEDT?

A: WM8523GEDT implements I2C and SPI interfaces, while WM8524CGEDT uses I2S interface exclusively. Package sizes differ (20-TSSOP vs. 16-TSSOP). Selection depends on the audio data protocol required by the application.

Q: Is WM8524CGEDT suitable for applications currently using SPI?

A: No. WM8524CGEDT supports only I2S interface. SPI-dependent designs require CS4398K-CZZ or WM8523GEDT, both of which include SPI capability.

Q: What does MSL 1 (Unlimited) mean compared to MSL 3 (168 Hours)?

A: MSL 1 indicates unlimited shelf life under controlled moisture conditions. MSL 3 requires use within 168 hours of package opening under specified humidity. WM8523GEDT and WM8524CGEDT offer superior moisture tolerance for extended storage and handling.

Q: Are all substitute parts pin-compatible with CS4350-DZZ?

A: No. Package types differ (24-TSSOP, 28-TSSOP, 20-TSSOP, 16-TSSOP). Pin assignments and counts vary. Each substitute requires independent PCB layout design and pinout verification.

Q: Which substitute supports the widest operating temperature range?

A: CS4350-DZZ itself supports -40°C to 105°C. Among substitutes, WM8523GEDT and WM8524CGEDT support -40°C to 85°C. CS4398K-CZZ is limited to -10°C to 70°C.

Q: Can I use multiple substitute parts interchangeably in the same design?

A: No. Each substitute has distinct interface protocols, package footprints, and electrical specifications. Design selection must commit to a single substitute part with corresponding PCB and firmware implementation.

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