Patent ID: 11909393
Assignee: SK HYNIX INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An input/output circuit comprising:
a pull-up driving circuit including at least one internal node coupled to a pad, the pull-up driving circuit configured to pull up a voltage of the pad to a transmission (Tx) power supply voltage;
a pull-down driving circuit configured to pull down the voltage of the pad to a ground voltage; and
a fixed voltage generation circuit configured to generate a fixed voltage, based on whether the pull-up driving circuit pulls up the voltage of the pad and the voltage level of the pad,
wherein the pull-up driving circuit is configured to set a voltage level of the at least one internal node to a voltage level of a power supply voltage on the basis of the fixed voltage, when a voltage difference between the Tx power supply voltage and the voltage of the pad is greater than the voltage level of the power supply voltage.