TCA9511A: Replacement recommend

Statham Su

Genius 4990 points

Part Number: TCA9511A
Other Parts Discussed in Thread: TCA4307, TCA9509

Hello Sir:

We are searching hot swapable with 2 bit level transfer.

Such as NXP, PCA9512A, or ADI LTC4315.

Please let us know your recommendations.

Thanks a lot.

over 1 year ago

0 Clemens Ladisch over 1 year ago

Guru 276420 points

TCA9511A or TCA4307.

0 Statham Su over 1 year ago in reply to Clemens Ladisch

Genius 4990 points

Hi Clemens:

We need has level shift function, likes PCA9512A and LTC4315.

But TCA9511A and TCA4307 has no this function.

Please recommend others for us.

Thanks a lot.

0 Clemens Ladisch over 1 year ago in reply to Statham Su

Guru 276420 points

The I²C signals can be pulled up to a voltage higher than V_CC.

There is no hot-swappable I²C buffer with two separate supplies.

0 Tyler Townsend over 1 year ago in reply to Statham Su

TI__Mastermind 30463 points

Hi Statham,

As Clemens has mentioned, we do not offer a hot-swappable buffer with dual supplies specifically for level-translation. TCA9511A or TCA4307 would be a good device choice when compared to the PCA9512A or LTC4315.

While our hot-swappable buffers do not have dual supplies specific for level-translation, I agree with Clemens comments on having the I2C signals being pulled up to a voltage higher than VCC.

What voltage level is the customer trying to translate to? 1.8V to 3.3V, 3.3V to 5V, etc?

Regards,

Tyler

0 Statham Su over 1 year ago in reply to Tyler Townsend

Genius 4990 points

Hi Tyler:

Sadly, customer application are only 3.3V or 1.8V to 3.3V.

If operate on 1.8V to 3.3V application, which means both TCA9511A and TCA4307 can not be used on their product.

Am I right?

Looking forward your feedback.

Thanks a lot.

0 Tyler Townsend over 1 year ago in reply to Statham Su

TI__Mastermind 30463 points

Hi Statham,

The TCA4307 and TCA9511A would work with the voltage ranges of 1.8V / 3.3V / 5V, but they do not conduct proper level translation. You could try using the TCA9509 which is a buffer with dual supply for level translation, however, this device does not support hot-swap capability. The hot-swap portion would have to be done with external components in addition to the TCA9509.

Regards,

Tyler

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TCA9511A: Replacement recommend