Voltage tolerant interface circuit

Details Voltage tolerant interface circuit Voltage tolerant interface circuit

1999-06-18

2000-11-07

Nguyen, Viet Q.

Electronic digital logic circuitry

Interface

Supply voltage level shifting

326 82, 326 62, 327328, 365226, H03K 1920

Patent

active

061442216

ABSTRACT:
An interface circuit functions as a so-called voltage tolerant circuit to which signals may be applied from, for example, a 3.3-V internal source or from an external source operating with a supply voltage greater than the internal source, for example, a 5-V source. By eliminating a floating voltage state in the internal circuits, problem-causing current leaks can be prevented in substantially all operating modes, that is, in any signal input or output mode, and in any voltage transition state, that is, irrespective of the sequence in which, for example, 0-V, 3.3-V, and 5-V signals are applied.

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