US 11,990,192 B2
Integrated circuit with ESD protection
Toshiaki Dozaka, Yokohama Kanagawa (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Electronic Devices & Storage Corporation, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION, Tokyo (JP)
Filed on Mar. 1, 2022, as Appl. No. 17/684,190.
Claims priority of application No. 2021-172764 (JP), filed on Oct. 22, 2021.
Prior Publication US 2023/0126057 A1, Apr. 27, 2023
Int. Cl. G11C 17/18 (2006.01); H01L 27/02 (2006.01); H02H 9/04 (2006.01); G11C 17/16 (2006.01)
CPC G11C 17/18 (2013.01) [H01L 27/0266 (2013.01); H01L 27/0288 (2013.01); H01L 27/0292 (2013.01); H02H 9/045 (2013.01); G11C 17/16 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An integrated circuit, comprising:
a first power supply line to which a first power supply voltage can be supplied;
a protection circuit connected to the first power supply line;
an internal circuit including a first transistor, a drain or a source of the first transistor being connected to the first power supply line, a breakdown voltage of the first transistor being lower than the first power supply voltage;
a second transistor on the first power supply line between the protection circuit and the internal circuit and configured to switch between conduction and non-conduction states to connect and disconnect the protection circuit and the internal circuit from each other along the first power supply line; and
a shutoff control circuit configured to place the second transistor in the non-conduction state during an ESD operation, wherein
the shutoff control circuit includes:
a resistive element and a capacitive element connected in series between the first power supply line and a ground potential;
a first inverter having an input terminal connected to a node between the resistive element and the capacitive element; and
a third transistor having a gate connected to an output terminal of the first inverter, a drain connected to a gate of the second transistor, and a source connected to a ground potential.