What is the function of this resistor and is it okay with this value ?

i2s Schematic


  • \$\begingroup\$ It is a pulldown resistor and it depends on the rest of the circuit, but probably it is ok \$\endgroup\$
    – tobalt
    Commented Nov 2, 2021 at 6:52

1 Answer 1


It's a pulldown resistor: it's purpose is to keep the signal down unless is properly driven to an high value: during startup or with the driver in 3-state, for example.

The actual value is not critical unless you have low drive strength signals or micropower constraint. Usually from 4.7k to 100k is typical (but in some case you can go down to about 2.2k and up to 4.7megs)

  • \$\begingroup\$ it's clear now, very good explanation. \$\endgroup\$ Commented Nov 2, 2021 at 8:06

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