DS92LV18: Need to Know about floating Pins

Sooraj Surendran

Part Number: DS92LV18

Hello Team
Am using the IC DS92LV18 IC and here am using only connections only for pins DIN[0-12] and ROUT[0-1]. Remaining pins for DIN and ROUT is left floating. please check and let us know whether i can float this pins or need to connect to GND or VCC. Attaching my circuit section below:

Please check the circuit also like any modifications is needed for this

3 months ago

0 Matt Smith 3 months ago

TI__Genius 16116 points

Hi Sooraj,

Unused DIN pins that are left floating are internally pulled down. If not using the full 18 bits of the payload, careful attention needs to be taken to avoid disrupting the random lock feature. These unused bits will still be transmitted, so in order for the receiver to maintain random data lock capability, care must be taken not to create a situation where the unused bits cause a repetitive multiple low-high transitions (RMTs). Avoid this by tying bits high at the LSB inputs (starting with DIN0) and bits tied low at the MSB inputs (inputs ending with DIN17).

ROUT pins can be floating as well.

Read this app note for more details: https://www.ti.com/lit/ug/snla202/snla202.pdf?ts=1772740025989&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FDS92LV18

Regards,

Matt

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DS92LV18: Need to Know about floating Pins