Explanation of supply voltage range

[twonsr]

Dear all :

When I read some datasheet, the specified supply voltage range is "-0.3v to 6v".

I don't understand why "-0.3v" is.

Could someone tell me about that ?

Thanks a lot.

 

[sunking]

Supply voltage range

dont make the diode turn on

 

[echo47]

Supply voltage range

The title of that section of the data sheet probably says "Absolute Maximum Ratings". That means the device should survive those crazy voltages without damage, but it won't necessarily operate normally over that entire range.

 

[philipwang]

Re: Supply voltage range

Which diode you mentioned? we know that when supply voltage exceed 6v(example) the device will be damaged, but when supply voltage is lower than -0.3v(example), what will happen? Thx!

Bg,

dont make the diode turn on

 

[Kral]

Re: Supply voltage range

twolevel2002,

Most ICs are constructed on a substrate consisting of P++ material. A "well" of N type material is then embedded in the substrate. The IC depends on the reverse biased diode formed by the N type well and the P++ substrate to keep the indiviual elements of the IC from shorting together. a voltage of -.3 volts is the maximum that can be applied without forward biasing the "substrate diode" and shorting everything together.
Regards,
Kral