JY-SEMICON

Contents 1. Introduction to PS/2 connector 2. PS/2 connector characteristics 3. Jingyang electronics' ESD/EOS protection solution for PS/2 interface 1. Introduction to PS/2 connector The PS/2 connector is an connector on a PC-compatible computer system that can be used to connect a keyboard and mouse. PS/2 is named after the personal computer launched by IBM in 1987: Personal System/2 (PS/2 series). This is a special connector for mouse and keyboard. It is a 6-pin circular connector but the mouse Only 4 pins are used to transmit data and power supply, and the remaining 2 pins are empty. It should be noted that when connecting to the PS/2 connector. When using the connector, pay attention to distinguish the mouse and keyboard connectors. The corresponding colors are as follows: Generally, for a motherboard that complies with the PC99 specification, the mouse connector is green and the keyboard connector is purple. In addition, it can also be judged from the relative position of the

1. VWM - is the maximum continuous working DC or pulse voltage of the TVS. When this reverse voltage is applied to the two poles of the TVS, it is in a reverse shutdown state, and the current flowing through it is less than or equal to its maximum reverse leakage current ID. ​ 2. VBR - is the minimum avalanche voltage of TVS. At 25°C, the protection TVS is not conductive before this voltage. When the specified 1mA current IR flows through the TVS, the voltage applied between the two poles of the TVS is its minimum breakdown voltage VBR. 3. IT ——Test current. 4. ID ——Reverse leakage current. 5. VC - When the pulse peak current IPP with a duration of 20us flows through the TVS, the maximum peak voltage that appears between its two poles is VC. It is the combination of voltage rise in series resistance and thermal temperature rise. 6. IPP - maximum peak pulse current. ​ 7. C---- Capacitance value (pF). In data transmission circuits such as bus connectors and communication connectors, it i