ISO7240C: Reason for changed of absolute maximum rating of Vi

Masanori Tachibana

Part Number: ISO7240C

Hi support team,

We have received some questions regarding ISO724x series from our customer.

When the datasheet was changed from Rev. P to Rev. Q, absolute maximum rating of Vi (Voltage at IN, OUT, EN) had been revised from "-0.5 ~ 6 V" to "-0.5 V ~ Vcc + 0.5 V".
Could you teach me why the absolute maximum rating of Vi had been changed?

Does that mean that the withstand voltage of Vi has been lowered?
Or does that mean that the tolerance of overshoot has weakened?

Sincerely,
M. Tachibana

over 5 years ago

0 Koteshwar Rao over 5 years ago

TI__Mastermind 49535 points

Hi Masanori,

There is no change in device from Rev P. to Rev Q., only the spec has been defined more accurately in Rev Q of datasheet.

Per Rev Q. when VCC = 5.5V, the abs max of input pin is VCC+0.5V which is nothing but 6V. So it still supports the same withstand voltage but is defined better in Rev Q. Since abs ma input signal voltage cannot be greater than its VCC by 0.5V, it has been defined as VCC+0.5V.

I hope this clarifies your question, thank you.

Regards,
Koteshwar Rao

0 Masanori Tachibana over 5 years ago in reply to Koteshwar Rao

Genius 5350 points

Hi Rao-san,

Thank you for teaching me.
I understood it, and I have already told the customer.

Sincerely,
M. Tachibana

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ISO7240C: Reason for changed of absolute maximum rating of Vi