CN106384732A - Integrated circuit with electrostatic discharge protection - Google Patents

Abstract

The invention discloses an integrated circuit with electrostatic discharge protection. The integrated circuit includes: the ESD protection circuit includes a housing, a circuit pin, an internal circuit, and an ESD protection unit. The internal circuit has at least one of a functional connection point, a power connection point, and a ground connection point; the electrostatic discharge protection unit comprises a first coupling end and a second coupling end, wherein the first coupling end is connected with a function connection point or a power connection point, and the second coupling end is connected with a function connection point which is not connected with the first coupling end or a grounding connection point. Therefore, the electrostatic discharge protection unit is arranged among the connecting points and packaged in the single integrated circuit, so that the integrated circuit has electrostatic discharge protection capability, the design and manufacturing cost of the whole circuit is reduced, and the whole circuit layout is more flexible.

Description

Integrated Circuits with ESD Protection

technical field

The invention relates to an integrated circuit, in particular to an integrated circuit with electrostatic discharge protection.

Background technique

In the modern age of ever-changing technology, electronic products have become an indispensable part of people's daily life, and the rapid evolution and widespread use of integrated circuits (ICs) is one of the important drivers for the rapid development of electronic products.

However, once the integrated circuit is affected by ElectroStatic Discharge (ESD), some unstable phenomena will often appear, such as sudden malfunction of the function, or the internal circuit of the integrated circuit collapsed due to the unbearable voltage or current of static electricity. damage. Generally, a transient voltage suppressor (TVS) is installed on the periphery of the integrated circuit to prevent damage caused by electrostatic discharge. Manufacturing cost, and the overall circuit layout is limited due to the additional transient voltage suppressor.

Therefore, it is necessary to propose an integrated circuit with electrostatic discharge protection to solve the defects of the prior art.

Contents of the invention

The object of the present invention is to provide an integrated circuit with electrostatic discharge protection capability.

To achieve the above and other objectives, the present invention provides an integrated circuit with electrostatic discharge protection, including a housing, at least one circuit pin, an internal circuit, and at least one electrostatic discharge protection unit. Wherein the internal circuit is arranged in the casing, the internal circuit has at least one of a functional connection point, a power connection point and a ground connection point, and these function connection points, power connection points and ground connection points are respectively connected to the corresponding circuit pins connected; and the electrostatic discharge protection unit is disposed in the housing, the electrostatic discharge protection unit has at least one first coupling end and at least one second coupling end; wherein, when the first coupling end is connected to the function When the connection point is connected, the second coupling terminal is connected to the functional connection point not connected to the first coupling terminal or to the grounding connection point; wherein, when the first coupling terminal is connected to the power supply connection point, The second coupling end is connected to the ground connection point.

In an embodiment of the present invention, the electrostatic discharge protection unit is adjacent to the internal circuit.

In an embodiment of the invention, the ESD protection unit is adjacent to the circuit pin.

In an embodiment of the present invention, the functional connection point is used to transmit one of a data signal, a voltage source signal, an output signal or a command signal.

In an embodiment of the invention, the electrostatic discharge protection unit is disposed on the circuit pin.

In an embodiment of the present invention, the electrostatic discharge protection unit includes a body, and the first coupling end and the second coupling end are disposed on the same side of the body.

In an embodiment of the present invention, the electrostatic discharge protection unit includes a body, and the first coupling end and the second coupling end are respectively disposed on two non-adjacent side surfaces of the body.

Thus, the integrated circuit with electrostatic discharge protection of the present invention, by disposing the electrostatic discharge protection unit between multiple connection points and packaging it in a single integrated circuit, enables the integrated circuit to have electrostatic discharge protection capability without further An additional transient voltage suppressor is provided, thereby reducing the design and manufacturing costs of the overall circuit, and making the overall circuit layout more flexible.

Description of drawings

FIG. 1 is a schematic diagram of an embodiment of an integrated circuit 1 with ESD protection according to the present invention.

FIG. 2 is a schematic diagram of an embodiment of the ESD protection unit 40 of the present invention.

Fig. 3 is a schematic diagram of an embodiment of the ESD protection unit 40' of the present invention.

FIG. 4 is a schematic diagram of an embodiment of the ESD protection unit 40 ″ of the present invention.

5a-5h are circuit diagrams of various embodiments of the ESD protection unit 40 of the present invention.

FIG. 6 is a schematic diagram of an embodiment of an integrated circuit 1' with ESD protection according to the present invention.

FIG. 7 is a schematic diagram of an embodiment of an integrated circuit 1 ″ with ESD protection according to the present invention.

Main component reference signs:

1, 1’, 1” integrated circuit

10 housing

20 circuit pins

30, 30’, 30” Internal Circuits

32 Function connection points

34 Power connection points

36 Ground connection point

40, 40’, 40” ESD Protection Units

42 Ontology

441 First coupling end

442 Second coupling end

detailed description

In order to fully understand the purpose, features and technical effects of the present invention, the present invention will be described in detail by means of the following specific embodiments in conjunction with the accompanying drawings, as follows:

Please refer to FIG. 1 and FIG. 2 , which are schematic diagrams of an integrated circuit 1 with ESD protection and an ESD protection unit 40 according to an embodiment of the present invention. The integrated circuit 1 includes a casing 10 , at least one circuit pin 20 , an internal circuit 30 and at least one electrostatic discharge protection unit 40 .

The casing 10 is used to package the portion of the circuit pin 20 , the internal circuit 30 and the ESD protection unit 40 therein to form the integrated circuit 1 . The circuit pin 20 can be used for signal transmission between the integrated circuit 1 and an external circuit (not shown in the figure), and the circuit pin 20 can also be used for grounding, receiving an input voltage, and the like. The internal circuit 30 can be a single functional circuit or an assembly of multiple functional circuits. The internal circuit 30 has at least one of a functional connection point 32, a power connection point 34 and a ground connection point 36, and respectively It is connected to the corresponding circuit pin 20 , wherein the functional connection point 32 can be used to transmit one of a data signal, a voltage source signal, an output signal or a command signal. In this embodiment, two functional connection points 32, a power connection point 34 and a ground connection point 36 are taken as examples, and two electrostatic discharge protection units 40 are taken as examples, and one of these electrostatic discharge protection units 40 is arranged on Between the power connection point 34 and the ground connection point 36, and another one of these electrostatic discharge protection units 40 is arranged between the two functional connection points 32, and these electrostatic discharge protection units 40 are all used to prevent electrostatic discharge from affecting the Any damage that the internal circuitry 30 may cause.

It is worth noting that, in this embodiment, not all connection points in the internal circuit 30 must be connected to the corresponding ESD protection unit 40, that is, the number and location of the ESD protection unit 40 It can be singular or multiple according to the design requirements, that is, each connection point can be selectively connected or not connected to the ESD protection unit 40 . Generally speaking, the ESD protection unit 40 is disposed between two different functional connection points 32, between the power connection point 34 and the ground connection point 36, and between the function connection point 32 and the ground connection point 36. between. Moreover, the ESD protection unit 40 can be disposed adjacent to the internal circuit 30 or adjacent to the circuit pin 20 according to the circuit wiring requirements.

The ESD protection unit 40 includes a body 42, a first coupling end 441 and a second coupling end 442, and the first coupling end 441 and the second coupling end 442 can be respectively connected to the functional connection point 32 in the manner described above. , the power connection point 34 and one of the ground connection point 36 are connected. In this embodiment, the first coupling end 441 and the second coupling end 442 are disposed on the same side of the body 42 .

Please refer to FIG. 3 , which is a schematic diagram of an ESD protection unit 40' according to another embodiment of the present invention. The difference between the ESD protection unit 40 ′ and the ESD protection unit 40 is that the first coupling end 441 and the second coupling end 442 of the ESD protection unit 40 ′ are respectively arranged on different sides of the body 42 . The adjacent two sides, that is, the electrostatic discharge protection unit of the present invention can adjust the relative positions of the coupling ends according to the design requirements, so that the configuration of the overall circuit is more flexible.

Please refer to FIG. 4 , which is a schematic diagram of an electrostatic discharge protection unit 40 " of another embodiment of the present invention. The difference between the electrostatic discharge protection unit 40 " and the above-mentioned electrostatic discharge protection unit is that the electrostatic discharge protection unit 40 " is also There may be two first coupling ends 441 and two second coupling ends 442, that is, the electrostatic discharge protection unit of the present invention can adjust the number of the first coupling ends and the second coupling ends according to design requirements, so as to Cooperate with the design and configuration of the overall circuit. Further, the electrostatic discharge protection unit can also have multiple first coupling terminals and a single second coupling terminal, that is, the electrostatic discharge protection unit can be connected through multiple first coupling terminals. terminals share a single second coupling terminal to achieve the technical effect of electrostatic discharge protection.

Please refer to Fig. 5a～Fig. 5h, it is the circuit diagram of various embodiments of the electrostatic discharge protection unit 40, 40 ', 40 " of the present invention. The electrostatic discharge protection unit 40, 40 ', 40 " can be enumerated in these accompanying drawings Different circuit configurations are used to achieve the technical effect of electrostatic discharge protection, and with various circuit configurations, the respective numbers of the first coupling end and the second coupling end of the electrostatic discharge protection unit can also be adjusted accordingly. It should be noted that the type, quantity and configuration of the diodes used in these figures are not limited thereto.

Please refer to FIG. 6 , which is a schematic diagram of an integrated circuit 1' with electrostatic discharge protection according to another embodiment of the present invention. Compared with the integrated circuit 1, the internal circuit 30' of the integrated circuit 1' has three functional connection points 32 and one ground connection point 36, and each functional connection point 32 is connected to the electrostatic discharge protection unit, There are two functional connection points 32 connected to the same ESD protection unit 40". Since the ESD protection unit 40" includes two sets of first coupling ends 441 and second coupling ends 442, the ESD The discharge protection unit 40" can be connected to two functional connection points 32 at the same time, and make these functional connection points 32 all have electrostatic discharge protection capabilities. Furthermore, in this embodiment, the two of the electrostatic discharge protection unit 40" The second coupling ends 442 are all connected to the ground connection point 36, so these second coupling ends 442 can be integrated into a single coupling end to reduce the volume of the ESD protection unit 40". In addition, the present invention Those skilled in the art can understand that the quantity of the first coupling end and the second coupling end of the ESD protection unit can be adjusted according to design requirements.

Please refer to FIG. 7 , which is a schematic diagram of an integrated circuit 1 "with electrostatic discharge protection according to another embodiment of the present invention. Compared with the above-mentioned embodiment, there is a functional connection point 32 in the internal circuit 30 " of the integrated circuit 1 " and a ground connection point 36, and the first coupling end 441 of the ESD protection unit 40' is connected to the functional connection point 32, and the second coupling end 442 (not shown) of the ESD protection unit 40' is The connection is set on a circuit pin 20 and is connected to the ground connection point 36 through the circuit pin 20, that is, the ESD protection unit 40' is connected between the functional connection point 32 and the ground connection point 36 , so that it has the technical effect of electrostatic discharge protection and makes the overall circuit layout more flexible.

Thereby, the integrated circuit with electrostatic discharge protection of the present invention, by arranging the electrostatic discharge protection unit between multiple connection points and packaging it in a single integrated circuit, makes the integrated circuit have electrostatic discharge protection capability, thereby reducing the overall The design and manufacturing costs of the circuit can also make the overall circuit layout more flexible; moreover, the electrostatic discharge protection unit of the present invention has multiple variations, which can also make the design of the integrated circuit more flexible.

The present invention has been disclosed above with preferred embodiments, but those skilled in the art should understand that the embodiments are only for describing the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to this embodiment should be considered within the scope of the present invention. Therefore, the protection scope of the present invention should be determined by the contents defined in the claims.

Claims (7)

1. An integrated circuit with electrostatic discharge protection, characterized in that, comprising: case; at least one circuit pin connected to the casing; The internal circuit is arranged in the casing, and the internal circuit has at least one of a functional connection point, a power connection point, and a ground connection point, and these function connection points, power supply connection points, and ground connection points are respectively connected to corresponding circuit pins. connection; and At least one electrostatic discharge protection unit is arranged in the casing, and the electrostatic discharge protection unit has at least one first coupling end and at least one second coupling end; Wherein, when the first coupling end is connected to the functional connection point, the second coupling end is connected to the functional connection point not connected to the first coupling end or to the ground connection point; Wherein, when the first coupling end is connected to the power connection point, the second coupling end is connected to the ground connection point. 2. The integrated circuit as claimed in claim 1, wherein the electrostatic discharge protection unit is adjacent to the internal circuit. 3. The integrated circuit as claimed in claim 1, wherein the ESD protection unit is adjacent to the circuit pin. 4. The integrated circuit of claim 1, wherein the functional connection point is used to transmit one of a data signal, a voltage source signal, an output signal or a command signal. 5. The integrated circuit as claimed in claim 1, wherein the electrostatic discharge protection unit is disposed on the circuit pin. 6. The integrated circuit according to any one of claims 1-5, wherein the electrostatic discharge protection unit comprises a body, and the first coupling end and the second coupling end are arranged on the same body of the body side. 7. The integrated circuit according to any one of claims 1-5, wherein the electrostatic discharge protection unit comprises a body, and the first coupling end and the second coupling end are respectively arranged on the body Non-adjacent sides.