LM3642 / Test condition at VIH (Input Logic High)

Hi Sonoki-san,

I will forward this question to the application engineer responsible of this device. I hope to get an answer by tomorrow.

Thank you,

Sami

Hi Sami-san,

I appreciate for you quick response. I'm waiting for the response from the engineer.

Best Regards

Sonoki

Hi Sonoki-san,

I got the answer from the apps:It is not 2.5V to 5.5V. It is 2.5V to 4.2V. If you are looking for a spec upto 5.5V, the limits on the datasheet will not apply.

Thanks,

Sami

Hi Sami-san,

Thank you for the response. I understand that the test condition of VIH is 2.5V to 4.2V. Then can you confirm why this condition (2.5V to 4.2V) is applied only VIH? In other words, why did the VIH test with 2.5 ≤ VIN ≤ 4.2V ? I would like to know it for my understanding.

Best Regards,

Sonoki

Hi Sonoki-san,

I noticed too that the reason for the condition was not explained. I will consult the apps engineer again.

Thank you,

Sami

Ｈｉ Sami-san,

Thank you for your support. I'm waiting for you update from apps engineer.

Best Regards,

Sonoki

Hi Sami-san,

Thank you for your response. I understand that  the 1.2V spec is guaranteed at 2.5V to 4.2V, and it will be high at larger range 2.5V to 5.5V. I will show the 1.25V as just for reference, not guaranteed value.

Best Regards,

Sonoki