SN65LVCP23: AC-coupled single-ended input?

Kei Kuwahara

Part Number: SN65LVCP23
Other Parts Discussed in Thread: SN65LVCP22

Tool/software:

Hello team,

My customer would like to use this device with AC-coupled single-ended clock input.
Does this device accept AC-coupled single-ended clock input?

On the datasheet, there is an input configuration for DC-coupled single-ended.
How can customer configure for AC-coupled input? (Single-ended)

Best Regards,
Kei Kuwahara

+1 Brian Zhou 5 months ago

Hi Kei:

For AC coupled input, common mode on B is 1.9v, you need to keep A common mode voltage at 1.9v as well by biasing Vtt .

Best

Brian

0 Kei Kuwahara 5 months ago in reply to Brian Zhou

Hi Brian-san,

Thank you for the quick answer!
Customer has additional questions. Could you please answer them?

Question 1
Is there any similar device to SN65LVCP23 with Active LOW EN logic? (Customer want output = H, when EN = L)

Question 2
Are there any EVMs for SN65LVCP23?

Best Regards,
Kei Kuwahara

0 Brian Zhou 5 months ago in reply to Kei Kuwahara

Hi Kei:

For Q1: both SN65LVCP22 and SN65LVCP23 support Active high EN logic. We don't have device support Active LOW EN logic.

For Q2: We inherited this device from other TI product line, but never found EVM for this device.

Best

Brian

0 Kei Kuwahara 4 months ago in reply to Brian Zhou

Hello Brian-san,

Thank you for the answer.
I have confirmed with customer, and they can you Active high EN logic.

Customer has designed input circuit for AC-coupled single-ended configuration as attached below.

Could you please check if this schematic is okay?
(Customer is creating 1.9V from 3.3V by two diodes drop voltage)

Best Regards,
Kei Kuwahara

0 Brian Zhou 4 months ago in reply to Kei Kuwahara

You just need Vcc and voltage divider like below.

Regards

Brian

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