Patent ID: 8050003
Filing Date: 2011-11-01
Classification: H01L

Abstract:
1. An electrostatic discharge protective circuit comprising: a transfer unit that transfers electrostaticity from at least one of a plurality of input/output pads to a boost bus line; a trigger unit that responds to the electrostaticity transferred via the boost bus line from at least one of the plurality of input/output pads to detect a trigger voltage and apply it to a trigger bus line; and a plurality of clamp units that are connected between the plurality of input/output pads and an internal circuit and are triggered by the trigger voltage to discharge the electrostaticity of the input/output pads to a first or second voltage bus line, wherein each of the clamp units includes: a first clamp that responds to the trigger voltage applied to the trigger bus line to discharge the electrostaticity of the input/output pad to the first voltage bus line; and a second clamp that responds to the trigger voltage applied to the trigger bus line to discharge the electrostaticity of the input/output pad to the second voltage bus line.