Semiconductor integrated circuit and semiconductor device including the same
An integrated circuit and semiconductor technology, applied in the field of semiconductor devices, can solve problems such as gate breakdown of MOS transistors, and achieve the effect of preventing transistor breakdown
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no. 1 example
[0028] figure 1 is a block diagram showing a configuration example of the semiconductor integrated circuit 1 according to the first embodiment. The semiconductor integrated circuit 1 according to the present embodiment can simply use a small-scale secondary clamp circuit to prevent transistors receiving signals transmitted between circuit blocks driven by different power sources gate breakdown. This will be described in detail below.
[0029] Such as figure 1 As shown, the semiconductor integrated circuit 1 includes a circuit block 11, a circuit block 12, a clamp circuit 13, a clamp circuit 14, a clamp circuit 15, a trigger circuit 16, and a transistor Tr1. The clamp unit 18 is formed by the clamp circuits 13 and 14 . As for the primary clamp circuits 13 to 15 , the secondary clamp 17 is formed by the trigger circuit 16 and the transistor Tr1 .
[0030] For example, the semiconductor integrated circuit 1 is provided in a small-scale analog IP (intellectual property) are...
no. 2 example
[0107] Figure 11 is a block diagram showing a configuration example of the semiconductor integrated circuit 2 according to the second embodiment. The semiconductor integrated circuit 1 has a configuration that protects transistors in the circuit block 12 that receive the different power supply crossing signal S1 from ESD breakdown. The semiconductor integrated circuit 2 has a configuration that protects transistors in the circuit block 11 that receive the different power supply crossing signal S2 from ESD breakdown. It will be described below.
[0108] The semiconductor integrated circuit 2 includes a secondary clamp circuit 27 instead of the secondary clamp circuit 17 of the semiconductor integrated circuit 1 . The secondary clamp circuit 27 has a transistor Tr2 and a trigger circuit 16 . The transistor Tr2 is provided between the different power supply crossing signal line S2 and the power supply voltage line VDD1 , and is turned on / off according to a trigger signal Strg...
no. 3 example
[0117] Figure 13 is a block diagram showing a configuration example of the semiconductor integrated circuit 3 according to the third embodiment. Unlike the semiconductor integrated circuit 1 , the semiconductor integrated circuit 3 also includes a regulator 19 . Instead of the secondary clamping circuit 17 , it also includes a secondary clamping circuit 37 .
[0118] The regulator 19 generates a predetermined stable internal voltage VINT from the power supply voltage VDD1. The line to which the internal voltage VINT is supplied will be referred to as an internal voltage line VINT hereinafter. In this case, the circuit block 11 is provided between the internal voltage line VINT and the reference voltage line VSS1. That is, the circuit block 11 is driven by the internal voltage VINT and the reference voltage VSS1.
[0119] The secondary clamp circuit 37 has a transistor Tr1 and a trigger circuit 16 . Trigger circuit 16 is provided between power supply voltage line VDD1 and...
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