Punch-through type protection element capable of being used for 5Gbps Ethernet

Abstract

The utility model discloses a novel technical scheme, and provides a punch-through type protection element which can be used for a 5Gbps Ethernet. A miniaturized SMT (Surface Mount Technology) MSOP10 is adopted for packaging, the MSOP10 comprises ten ports, namely, a pin 1, a pin 2, a pin 3, a pin 4, a pin 5, a pin 6, a pin 7, a pin 8, a pin 9 and a pin 10, a protection unit from the pin 1 to the pin 3 is composed of one of a first chip, a second chip and a third chip, a protection unit from the pin 5 to the pin 3 is composed of one of a fourth chip, a fifth chip and a third chip, and the protection unit from the pin 5 to the pin 3 is composed of one of a first chip, a second chip and a third chip. The protection unit from the pin7 to the pin3 is composed of one of a sixth chip, a seventh chip and a third chip, and the protection unit from the pin9 to the pin3 is composed of one of an eighth chip, a ninth chip and a third chip. Through the reasonable structure and chip design, the parameters that VRWM is equal to 3.3 V, CJ (f is equal to 1 MHz, VR is equal to 0 V) is equal to 1.2 pF, IPPmax (tp is equal to 8 / 20 us) is larger than or equal to 20 A, and VESD (Contact Model) is larger than or equal to + / -30 KV are obtained, the manufacturing difficulty is lower, and meanwhile four paths of independent protection are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of semiconductor technology, mainly relates to a kind of through type protection element for 5Gbps Ethernet. BACKGROUND

[0002] Ethernet is a kind of local area network (LAN) technology with IEEE 802.3 standard. Now, 10Mbps, 100Mbps, 1Gbps, 2.5Gbps, 5Gbps bandwidth signal, twisted-pair wire and other forms of wired access Ethernet appear in the market. The data transmission rate of 5Gbps Ethernet is as high as 5Gbps, while the transmission limit of 100 meters needs to be guaranteed. Electrostatic discharge (ESD) is a common transient overcurrent threat in Ethernet use.

[0003] Figure 4 It is a circuit scheme applied to 5Gbps Ethernet, which can provide through type without connecting column, so that the wiring process of PCB board can be simplified, and electromagnetic interference (EMI) caused by connecting column on PCB board can be reduced. The left side of the circuit is twisted-pair wire, and A1 and A2 are two 4-way unidirectional through type protection elements with same performance, used to protect the rear-end Ethernet PHY (physical layer device). The 4-way through type protection element adopts miniaturized SMT (surface mount technology) MSOP10 package, wherein pin1, pin5, pin7 and pin9 are 4-way I / O data interface ends, pin3 and pin8 are ground ends, pin3 is connected with pin8. Pin2, pin4, pin6 and pin10 are useless ports. Its equivalent circuit is shown in Figure 3 It is a 4-way unidirectional protection element. From pin3 and pin8 to pin1 or pin5 or pin7 or pin9 is the forward conduction characteristic of diode, and from pin1 or pin5 or pin7 or pin9 to pin3 and pin8 is the reverse breakdown protection characteristic of diode, and the corresponding volt-ampere characteristic curve is shown in Figure 6

[0004] 5Gbps Ethernet has the characteristics of 5Gbps high-speed data transmission rate and not higher than 3.3V PHY reference voltage, and the corresponding protection element needs to have not higher than 1.5pF capacitance and not higher than 3.3V working voltage. Low capacitance can reduce the negative effect of useful signal, and low working voltage can protect in time. Considering the surge situation in actual application, the protection element needs to have not less than 20A super strong surge resistance and ±30KV ESD resistance.

[0005] Figure 5 ​It is a conventional MSOP10 package 4-way unidirectional pass-through type protection element applied in 5Gbps Ethernet, the performance of the element meets: VRWM=3.3V, CJ(f=1MHz, VR=0V)=1.2pF, IPPmax(tp=8 / 20us) >=20A, VESD(Contact Mode) >=+ / -30KV. Pin1-pin10 are 10 ports of MSOP10. 26 is a plastic package. Chips 11, 12, 16 and 17 are low-capacitance unidirectional switch chips with P-type substrate structure, which meet the parameters: CJ(f=1MHz, VR=0V)=0.6pF, IPPmax(tp=8 / 20us) >=20A, VBR(IT=1mA) >=50V. Chips 13 and 15 are double-core chips of chip 11, and chip 14 is a transient suppression unidirectional diode chip with P-type substrate structure, which meets the parameters: CJ(f=1MHz, VR=0V) >=50pF, IPPmax(tp=8 / 20us) >=20A, VBR(IT=1mA) >=3.5V. 18, 19, 20, 21, 22, 23, 24 and 25 are wires, and the wire material is generally 1.0mil-1.2mil Cu wire.

[0006] In a conventional MSOP10 package 4-way unidirectional pass-through type protection element applied in 5Gbps Ethernet, since the low-capacitance unidirectional switch chips commonly seen in the market are mostly N-type substrate structure, the low-capacitance unidirectional switch chip with P-type substrate structure is a very unconventional structure chip, which increases the manufacturing and procurement cost. The protection units of pin1-pin3 are composed of one of chips 11 and 13 and 14, the protection units of pin5-pin3 are composed of one of chips 16 and 13 and 14, the protection units of pin7-pin3 are composed of one of chips 17 and 15 and 14, the protection units of pin9-pin3 are composed of one of chips 17 and 15 and 14, and the 4-way protection structure uses one transient suppression unidirectional diode chip 14, if the transient suppression unidirectional diode chip is burned out, the 4-way protection will fail at the same time. Content of the utility model

[0007] Therefore, the utility model aims at providing a pass-through type protection element which can be used in 5Gbps Ethernet. Through reasonable structure and chip design, the parameters of VRWM=3.3V, CJ(f=1MHz, VR=0V)=1.2pF, IPPmax(tp=8 / 20us) >=20A and VESD(Contact Mode) >=+ / -30KV are obtained, the manufacturing difficulty is lower, and 4-way independent protection is realized.

[0008] In order to achieve the above object, the utility model discloses a kind of through type protection elements for 5Gbps Ethernet, using the MSOP10 package of miniaturization SMT, the MSOP10 includes 10 ports, respectively pin1, pin2, pin3, pin4, pin5, pin6, pin7, pin8, pin9 and pin10, the protection unit of pin1 to pin3 is composed of 1 chip in first chip, second chip and third chip, the protection unit of pin5 to pin3 is composed of 1 chip in fourth chip, fifth chip and third chip, the protection unit of pin7 to pin3 is composed of 1 chip in sixth chip, seventh chip and third chip, the protection unit of pin9 to pin3 is composed of 1 chip in eighth chip, ninth chip and third chip.

[0009] In some embodiments, the first chip, the ninth chip, the sixth chip and the fifth chip are low-capacity unidirectional switch dies of N-type substrate structure, the third chip is a four-core continuous chip of the first chip, and the second chip, the eighth chip, the seventh chip and the fourth chip are transient suppression unidirectional diode dies of N-type substrate structure.

[0010] In some embodiments, the first chip is connected to pin3 by a first wire, the second chip is connected to the third chip by a second wire, the eighth chip is connected to the third chip by a third wire, the ninth chip is connected to pin8 by a fourth wire, the sixth chip is connected to pin8 by a fifth wire, the seventh chip is connected to the third chip by a sixth wire, the fourth chip is connected to the third chip by a seventh wire, and the fifth chip is connected to pin3 by an eighth wire.

[0011] In some embodiments, the first wire, the second wire, the third wire, the fourth wire, the fifth wire, the sixth wire, the seventh wire and the eighth wire are Cu wires with a diameter of 1.0 mil to 1.2 mil.

[0012] In some embodiments, pin1, pin5, pin7 and pin9 are 4-way I / O data interface ends, pin3 and pin8 are ground ends, pin3 is connected to pin8, and pin2, pin4, pin6 and pin10 are unused ports.

[0013] The utility model has the advantages that:

[0014] 1. The utility model provides a new technical scheme can provide a kind of through type protection element for 5Gbps Ethernet. Through reasonable structure and chip design, obtain the parameter of VRWM=3.3V, CJ (f=1MHz, VR=0V)=1.2pF, IPPmax (tp=8 / 20us)≥20A, VESD (Contact Mode)≥±30KV, with lower manufacturing difficulty, simultaneously realize 4-way independent protection.

[0015] 2, the utility model discloses the element performance can satisfy: VRWM=3.3V, CJ (f=1MHz, VR=0V)=1.2pF, IPPmax (tp=8 / 20us)≥20A, VESD (Contact Mode)≥±30KV. Pin1-pin10 are the 10 ports of MSOP10. 26 is plastic package. Chip 27, 30, 31, 34 are the low-capacity unidirectional switch tube chips of common N-type substrate structure, and its parameters satisfy: CJ (f=1MHz, VR=0V)=0.6pF, IPPmax (tp=8 / 20us)≥20A, VBR (IT=1mA)≥50V, chip 35 is the four-core continuous chip of chip 27, and chip 28, 29, 32, 33 are the transient suppression unidirectional diode chips of N-type substrate structure, and its parameters satisfy: CJ (f=1MHz, VR=0V)≥50pF, IPPmax (tp=8 / 20us)≥20A, VBR (IT=1mA)≥3.5V. 36, 37, 38, 39, 40, 41, 42, 43 are wire, and wire material is generally 1.0mil-1.2mil Cu wire.

[0016] 3, the utility model uses the low-capacity unidirectional switch tube chip of N-type substrate structure, and manufacturing cost and procurement cost are lower, so reduce the processing difficulty. The protection unit of pin1 to pin3 of the utility model is composed of chip 27, 28 and 1 chip of 35, the protection unit of pin5 to pin3 is composed of chip 33, 34 and 1 chip of 35, the protection unit of pin7 to pin3 is composed of chip 31, 32 and 1 chip of 35, the protection unit of pin9 to pin3 is composed of chip 29, 30 and 1 chip of 35, and 4-way unit independent protection, wherein 1 way is damaged, and the normal protection effect of other 3 ways is not affected. ACCURACY

[0017] In order to more clearly understand the purpose and advantages of the utility model, the following will be described in detail in conjunction with the drawings, and the drawings are as follows:

[0018] Figure 1 It is the structure diagram of the utility model's a kind of through type protection element for 5Gbps Ethernet.

[0019] Figure 2 The utility model relates to a kind of through-type protection elements for 5Gbps Ethernet with the MSOP10 appearance graph of conventional through-type protection elements for 5Gbps Ethernet.

[0020] Figure 3 The utility model relates to a kind of through-type protection elements for 5Gbps Ethernet with the equivalent circuit diagram of conventional through-type protection elements for 5Gbps Ethernet.

[0021] Figure 4 The utility model relates to a kind of through-type protection elements for 5Gbps Ethernet with the application diagram of conventional through-type protection elements for 5Gbps Ethernet.

[0022] Figure 5 It is the structure diagram of conventional through-type protection elements for 5Gbps Ethernet.

[0023] Figure 6 The utility model relates to a kind of through-type protection elements for 5Gbps Ethernet with the volt-ampere characteristic curve diagram of conventional through-type protection elements for 5Gbps Ethernet. DETAILED DESCRIPTION

[0024] The utility model is further described in detail in the following with the accompanying drawings and embodiment. With 2.5V voltage grade as example to make detailed explanation.

[0025] Figure 1 As shown in the structure diagram of a kind of through-type protection elements for 5Gbps Ethernet of the utility model. The structure adopts miniaturization SMT (surface mount technology) MSOP10 package, wherein pin1, pin5, pin7, pin9 are 4-way I / O data interface end, pin3, pin8 are ground terminal, pin3 is connected with pin8. Pin2, pin4, pin6, pin10 are useless port. Its equivalent circuit is as shown in Figure 3 As shown in the structure diagram of a kind of through-type protection elements for 5Gbps Ethernet of the utility model. The structure adopts miniaturization SMT (surface mount technology) MSOP10 package, wherein pin1, pin5, pin7, pin9 are 4-way I / O data interface end, pin3, pin8 are ground terminal, pin3 is connected with pin8. Pin2, pin4, pin6, pin10 are useless port. Its equivalent circuit is as shown in Figure 6 As shown in the structure diagram of a kind of through-type protection elements for 5Gbps Ethernet of the utility model. The structure adopts miniaturization SMT (surface mount technology) MSOP10 package, wherein pin1, pin5, pin7, pin9 are 4-way I / O data interface end, pin3, pin8 are ground terminal, pin3 is connected with pin8. Pin2, pin4, pin6, pin10 are useless port. Its equivalent circuit is as shown in

[0026] The element performance can satisfy: VRWM=3.3V, CJ(f=1MHz, VR=0V)=1.2pF, IPPmax(tp=8 / 20us)≥20A, VESD(Contact Mode)≥±30KV. Pin1-pin10 are 10 ports of MSOP10. 26 is a plastic sealing body. Chips 27, 30, 31 and 34 are low-capacitance unidirectional switch chips with common N-type substrate structure, and the parameters satisfy: CJ(f=1MHz, VR=0V)=0.6pF, IPPmax(tp=8 / 20us)≥20A, VBR(IT=1mA)≥50V. Chip 35 is a four-core continuous chip of chip 27, and chips 28, 29, 32 and 33 are transient suppression unidirectional diode chips with N-type substrate structure, and the parameters satisfy: CJ(f=1MHz, VR=0V)≥50pF, IPPmax(tp=8 / 20us)≥20A, VBR(IT=1mA)≥3.5V. 36, 37, 38, 39, 40, 41, 42 and 43 are wires, and the wire material is generally 1.0mil-1.2mil Cu wire.

[0027] Since the manufacturing cost and procurement cost of the low-capacitance unidirectional switch chip with N-type substrate structure are lower, the processing difficulty is reduced. The protection unit of pin1-pin3 is composed of one of chips 27, 28 and 35, the protection unit of pin5-pin3 is composed of one of chips 33, 34 and 35, the protection unit of pin7-pin3 is composed of one of chips 31, 32 and 35, and the protection unit of pin9-pin3 is composed of one of chips 29, 30 and 35, so that four units are independently protected, and when one of the four units is damaged, the normal protection of the other three units is not affected.

[0028] Finally, it should be pointed out that: those skilled in the art should understand that the present application is not limited by the above implementation examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A pass-through protection element usable for 5 Gbps Ethernet, characterized in that, The MSOP10 of miniaturized SMT includes 10 ports, pin1, pin2, pin3, pin4, pin5, pin6, pin7, pin8, pin9 and pin10, the protection unit of pin1-pin3 is composed of one of the first chip (27), the second chip (28) and the third chip (35), the protection unit of pin5-pin3 is composed of one of the fourth chip (33), the fifth chip (34) and the third chip (35), the protection unit of pin7-pin3 is composed of one of the sixth chip (31), the seventh chip (32) and the third chip (35), and the protection unit of pin9-pin3 is composed of one of the eighth chip (29), the ninth chip (30) and the third chip (35).

2. The pass-through protection component for 5 Gbps Ethernet of claim 1, wherein, The first chip (27), the ninth chip (30), the sixth chip (31) and the fifth chip (34) are low-capacity unidirectional switch chips with N-type substrate structure, the third chip (35) is a four-core continuous chip of the first chip (27), and the second chip (28), the eighth chip (29), the seventh chip (32) and the fourth chip (33) are transient suppression unidirectional diode chips with N-type substrate structure.

3. The pass-through protection component for 5 Gbps Ethernet of claim 1, wherein, The first chip (27) is connected with pin3 through the first wire (36), the second chip (28) is connected with the third chip (35) through the second wire (37), the eighth chip (29) is connected with the third chip (35) through the third wire (38), the ninth chip (30) is connected with pin8 through the fourth wire (39), the sixth chip (31) is connected with pin8 through the fifth wire (40), the seventh chip (32) is connected with the third chip (35) through the sixth wire (41), the fourth chip (33) is connected with the third chip (35) through the seventh wire (42), and the fifth chip (34) is connected with pin3 through the eighth wire (43).

4. The pass-through protection component for 5 Gbps Ethernet of claim 3, wherein, The first wire (36), the second wire (37), the third wire (38), the fourth wire (39), the fifth wire (40), the sixth wire (41), the seventh wire (42) and the eighth wire (43) are Cu wires with a diameter of 1.0mil-1.2mil.

5. The pass-through protection component for 5 Gbps Ethernet of claim 1, wherein, The pin1, pin5, pin7 and pin9 are 4-way I / O data interface ends, the pin3 and pin8 are ground ends, the pin3 is connected with the pin8, and the pin2, pin4, pin6 and pin10 are useless ports.

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