TCA9509: VILC > 0.4V solution recommendation

Solution for what problem? Buffering? Level shifting (between which voltages)?

For systems not above 3.3 V, use the TCA9800/1/2/3 (which has a current source on the B side, but no strict V_IL requirement).

Hi Ann,

Does the customer need VILC > 0.4V due to too low VILC on TCA9509 A-side? 

Can the customer look into what Clemens suggested with the TCA980x devices which do not have internal current source on A-side. ICS is on the B-side. Low-level and high-level supply voltages are more lenient on the TCA980x. 

Can the customer use the TCA9517 or TCA9517A and connect the B-side to the application requiring VILC > 0.4V? 

Regards,

Tyler

Hello Tyler,

But for TCA980x series, we've already checked the spec and it should not be okay to use also due to voltage level invalid on A side. For TCA9517A, customer also rejected due to voltage level invalid.

if Vilc in B side, this voltage need to less than Vilc of 9515 (0.47~0.6).

If for 9517, Vol is 0.45~0.6, not less than (0.47~0.6)

May you have other choice for customer? Thanks a lot!

Thanks a lot!

Best regards,

Ann Lien

The TCA980x's A-side V_IL is 30 % of V_CC.

What are your customer's voltage level requirements? At what supply voltage?

Hi Ann,

Similar to what Clemens has suggested here, what does the customer mean by "also rejected due to voltage level invalid?" 

Regards,

Tyler

Hello Tyler and Clemens,

Please see customer's requirement, thanks!

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For 9800, B side has Vilc voltage, and  it connects to 9515. Thus does not work.

Thanks

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Best regards,

Ann Lien

The TCA9800 does not have a V_ILC limit (but it does have I_ILC limit and R_ILC limits).

We cannot help you if we do not know the requirements. What are the supply voltages on both sides, and what are the devices (and their voltage thresholds) on the A side?

Hi Ann,

Does the customer have a schematic of their implementation with voltage supplies, and which side is connected of the TCA9800 and PCA9515B? 

Regards,

Tyler

Hello Tyler and Clemens,

Customer is using TCA9800 B side connected to PCA9515B. Thanks!

Best regards,

Ann Lien