TCA39306-Q1: Down translation from 3.3V(Master) to 1.8V,2.5V(slave)

karthik Santhanam

Prodigy 50 points

Part Number: TCA39306-Q1

Tool/software:

Hi ,

As perTCA39306-Q1:data sheet allowed voltage-level translation is below added (Lower Voltage to higher voltage)

Can we use it for 3.3V(master) to 1.8V/2.5V (slave) down translation? Please suggest

Thanks

Karthik Santhanam

2 months ago

+1 Clemens Ladisch 2 months ago

Guru 316690 points

These are just examples. This device allows translation between any two voltages up to 5.5 V.

0 Tyler Townsend 2 months ago

TI__Mastermind 47328 points

Hi Karthik,

Yes this is possible. If you are going to use the VREF1 side for the master and VREF2 side for the slave, you might see slightly worse prop delays (ns range) due to using the higher voltage on the VREF1 side. Level translation should still work properly, and for I2C applications should not make a large enough difference as to cause any problems.

Regards,

Tyler