US 2011/0235224 A1 · SEMICONDUCTOR INTEGRATED CIRCUIT

Abstract

A circuit device connected between a neighboring pair of terminals in a semiconductor integrated circuit is protected from electrostatic damage due to a surge voltage when the surge voltage is applied between the neighboring pair of terminals. The semiconductor integrated circuit is formed to include terminals P0-P14, MOS transistors MN0-MN15 in diode connection, protection diode circuits HD0-HD14, MOS transistors T1-T14 for discharging electricity from batteries, a battery voltage detection control circuit and a clamp circuit for overvoltage protection. Each of the MOS transistors T1-T14 for discharging electricity from the batteries is connected between each neighboring pair of the terminals P0-P14 through wirings. Each of the MOS transistors MN1-MN14 in diode connection is connected between each neighboring pair of the terminals.

Claims10

Dependent claims

A semiconductor integrated circuit, comprising:

a plurality of terminals, a battery being connected between each neighboring pair of the plurality of terminals;
a circuit device connected between the neighboring pair of the terminals;
and
an overvoltage protection device connected between the neighboring pair of the terminals and protecting the circuit device from an overvoltage applied between the neighboring pair of the terminals.

1 more element

A semiconductor integrated circuit, comprising:

a first terminal;
a second terminal;
a third terminal;
a first battery being connected between the first terminal and the second terminal, a second battery being connected between the second terminal and the third terminal;
a first circuit device connected between the first terminal and the second terminal;
a first overvoltage protection device being connected between the first terminal and the second terminal and protecting the first circuit device from an overvoltage;
a second circuit device connected between the second terminal and the third terminal;
a second overvoltage protection device being connected between the second terminal and the third terminal and protecting the second circuit device from an overvoltage;
a protection diode circuit connected to the second terminal;
and
a third overvoltage protection device connected between the first terminal and the third terminal.

8 more elements

Dependencies are inferred from the claim text.

Semiconductor integrated circuit

Life of this patent

Semiconductor integrated circuit

Life of this patent

Abstract

Claims10