5v tolerant I/O circuit

Details 5v tolerant I/O circuit 5v tolerant I/O circuit

1997-02-07

1998-12-22

Ton, My-Trang Nu

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

361 56, H03K 300, H02H 320

Patent

active

058523758

ABSTRACT:
An integrated circuit has an I/O circuit that is connected to an I/O PAD. The I/O PAD may have greater voltage than the VDD associated with the integrated circuit so there is provided a switching circuit that is connected between the VDD and the I/O PAD. An output circuit is also provided that comprises n-channel transistors connected between the PAD and the ground. There is a cascode arrangement of p-channel transistors connected between the I/O PAD and VDD.

REFERENCES:
patent: 4983860 (1991-01-01), Yim et al.
patent: 5300835 (1994-04-01), Assar et al.
patent: 5528447 (1996-06-01), McManus et al.
patent: 5617283 (1997-04-01), Krakauer et al.
patent: 5712586 (1998-01-01), Kitao

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