Hi, I’m considering buying the CS4270-CZZ for a hobby project. The datasheet on the digi-key listing (https://media.digikey.com/pdf/Data%20Sheets/Cirrus%20Logic%20PDFs/CS4270.pdf) has the allowable voltage range as 3.1 to 5.25 V, but a different datasheet (apparently for exactly the same product) I found on the cirrus logic website (https://statics.cirrus.com/pubs/proDatasheet/CS4270_DS686F2.pdf) has the allowable voltage range as 4.75 to 5.25 V.
Is there a way for me to find out whether a part I buy will support 3.3 V operation?
Thanks
The first data sheet is from 2006, the second sheet is from 2021. The revision notes for March 2021 includes (page 45):
Removed support for VA at 3.3 V throughout (VA supported at 5 V only).
I don’t see any indication if the first spec was a mistake, or if the chip design was changed in 2021. I’d bet on a mistake, since a 5V only mode of operation is not a desirable attribute in the 21st century,
If it was to correct a data sheet mistake then no parts will be reliable in VA mode @ 3.3V.
If it represents a design change then you need to find parts with a manufacturing date from before the change.
Thanks for your reply. I’m intending to power it from USB VBUS without a boost converter so I don’t think this particular IC has sufficient supply voltage range for my use case.
AFAIK, USB VBUS is always 5V (4.75 to 5.25) so no boost needed
Thank you for catching this error, our website has been updated and now has the 2021 datasheet.
1 Like