DP83822I: RESET PULSE WIDTH

Brian Wang0928

Part Number: DP83822I

Hello,

I'd like to confirm the timing of the RESET pulse width. In the D/S page 6 pin configuration, it mentioned the minimum duration for RESET is 1uS at least. But in the page 11 (7.7 Timing requirement, Reset Timing), the minimum value is defined as 10uS. so i'm confused about these. could you clarify it. thanks.

BTW, is there over temperature protection inside the device? if so, what's the trigger thermal temp?

over 5 years ago

0 Cecilia Reyes over 5 years ago

TI__Genius 9920 points

Hi Brian,

T1 should be 10us but I will need to confirm with our design team.

Best,

Cecilia

0 Brian Wang0928 over 5 years ago in reply to Cecilia Reyes

TI__Genius 14090 points

Please help to check what exact min time for reset function? Very thanks.

0 Cecilia Reyes over 5 years ago in reply to Brian Wang0928

TI__Genius 9920 points

Hi Brian,

The team has confirmed with me that the minimum width time is 10us. We will update this in the next refresh of our datasheet.

Thanks,

Cecilia

0 Brian Wang0928 over 5 years ago in reply to Cecilia Reyes

TI__Genius 14090 points

Cecilia, thanks.

1. Is 10uS really a minimum width time for /RESET pin? or 1uS? Customer mentioned they tried to assert this pin(/RESET pin) low with 1uS, and it was activated? So I'm a little confused about this. Could you double check this behavior?

In the TEST CONDITIONS, it shows the 1uS is a minimum pulse low time, was it a typo?

2. Is the /RESET pin integrated a pull-high resistor or not? if so, what's the resistor value inside?

Please help to clarify them. very thanks.

Regards

Brian W

0 Cecilia Reyes over 5 years ago in reply to Brian Wang0928

TI__Genius 9920 points

Hi Brian,

1. The 1us could be part to part variation and we cannot guarantee that the 1us will work for all as expected. As mentioned before, it was a typo in the test conditions that we will need to update.

2. In the pin map you can see that the RESET pin is an internal pull up. The value is mentioned above in 'integrated pullup resistance'

Thanks,

Cecilia

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DP83822I: RESET PULSE WIDTH