German VISHAY plug VISHAY model VISHAY price

VISHAY plug is the public communication backbone for transmitting information between various functional components of a computer. It is a transmission bundle composed of wires. According to the types of information transmitted by the computer, the computer bus can be divided into data bus, address bus, and control bus, which are used to transmit data, data addresses, and control signals, respectively. The bus is an internal structure; it is the common channel for cpu, memory, input, and output devices to transmit information. The various components of the host are connected via the bus, and external devices are connected to the bus through corresponding interface circuits, thereby forming the computer hardware system. In a computer system, the public path for transmitting information between components is called the bus. Microcomputers use a bus structure to connect various functional components.

VISHAY plug working principle

If the motherboard (Mother Board) is a city, then the bus is like the public buses (bus) in the city, transporting bits (bit) that operate back and forth along fixed routes. These lines can only be responsible for transmitting one bit at a time. Therefore, multiple lines must be used simultaneously to transmit more data. The number of data items the bus can transmit simultaneously is called the width (width), measured in bits. The greater the bus width, the better the transmission performance. The bus bandwidth (i.e., the total amount of data that can be transmitted per unit time) is: Bus Bandwidth = Frequency x Width (Bytes/sec). When the bus is idle (other devices are connected to the bus in a high-impedance state) and a device needs to communicate with a target device, the initiating device drives the bus, issuing address and data. Other devices connected to the bus in a high-impedance state, upon receiving (or being able to receive) address information matching their own, accept the data on the bus. After the sending device completes communication, it releases the bus (output changes to high-impedance state).

VISHAY plug features

1) Physical characteristics: Physical characteristics, also known as mechanical characteristics, refer to the properties exhibited by components on the bus during physical connection, such as the geometric dimensions, shape, number of pins, and arrangement order of plugs and sockets. 2) Functional characteristics: Functional characteristics refer to the function of each signal line. For example, the address bus is used to represent address codes. The data bus is used to represent transmitted data, and the control bus represents commands, status, etc., for operations on the bus. 3) Electrical characteristics: Electrical characteristics refer to the signal direction on each signal line and the voltage range representing valid signals. Typically, signals sent by the master device (such as CPU) are called output signals (OUT), and signals sent into the master device are called input signals (IN). Typically, for data and address signals, a high level is defined as logic 1 and a low level as logic 0. There is no customary convention for control signals; for example, WE indicates active low, and Ready indicates active high. There is no uniform regulation for the high and low voltage ranges of different buses; they usually comply with TTL. 4) Timing characteristics: Timing characteristics, also known as logical characteristics, refer to when signals on each signal line are valid during bus operations. Through these timing relationships for signal validity, correct bus operation is ensured. To improve computer scalability and the universality of components and devices, apart from on-chip buses, all components or devices adopt standardized forms to connect to the bus and implement information transmission on the bus in a standardized manner. These standardized connection forms and operation methods of the bus are collectively referred to as bus standards. Examples include ISA, PCI, and USB bus standards. Correspondingly, buses adopting these standards are ISA bus, PCI bus, and USB bus.

VISHAY plug safety parameters

1) Insulation resistance: Insulation resistance refers to the resistance value presented by leakage current generated on or within the surface of the insulating part of a connector when voltage is applied. It is mainly influenced by factors such as insulation material, temperature, humidity, and contamination. The insulation resistance values provided in connector samples are generally indicator values under standard atmospheric conditions. Under certain environmental conditions, insulation resistance values will decrease to varying degrees. Additionally, pay attention to the test voltage value for insulation resistance. According to Insulation Resistance (MΩ) = Voltage applied to the insulator (V) / Leakage Current (μA), applying different voltages yields different results. In connector tests, the applied voltages generally have three levels: 10V, 100V, and 500V. 2) Rated voltage: Dielectric strength is the critical voltage that the mutually insulated parts of contact pairs or between insulated parts and ground can withstand for a specified time without breakdown, exceeding the rated voltage. It is mainly influenced by contact pair spacing, creepage distance, geometric shape, insulator material, ambient temperature and humidity, and atmospheric pressure. 3) Mechanical life: The mechanical life of a connector refers to its mating/unmating cycle life, typically specified as 500 to 1000 cycles. When this specified mechanical life is reached, indicators such as contact resistance, insulation resistance, and dielectric strength should not exceed specified values. Strictly speaking, mechanical life is related to time; using 500 cycles over 10 years is obviously different from using 500 cycles over 1 years. First, select the number of contact pairs based on circuit requirements, while considering the connector's volume and total separation force. A larger number of contact pairs naturally results in a larger volume and relatively greater total separation force. In cases with high reliability requirements and permissible volume, two contact pairs can be connected in parallel to improve connection reliability. In connector plugs and sockets, pins (male contacts) and sockets (female contacts) are generally interchangeable. In actual use, selection can be made based on the energized status at both ends of the plug and socket. For example, if the socket needs to remain energized, choose a socket equipped with female contacts, because the energized contacts are embedded in the insulator, making them less accessible to human touch and thus relatively safer. Mainly consider the electrical continuity of contact pairs under vibration, shock, and collision at specified frequencies and accelerations. Contact pairs may experience instantaneous open circuits under such dynamic stress. Specified instantaneous interruption times generally include 1μs, 10μs, 100μs, 1ms, and 10ms. Note how to judge instantaneous interruption faults in contact pairs. Currently, it is considered that a fault in a closed contact pair (contact) is determined when the voltage drop across its ends exceeds 50% of the power source electromotive force. That is, there are two conditions for judging instantaneous interruption: duration and voltage drop, both of which are indispensable. Connectors generally consist of plugs and sockets, where the plug is also called a free-end connector, and the socket is also called a fixed connector. Circuit connection and disconnection are achieved through the mating and unmating of plugs and sockets, resulting in various connection methods for plugs and sockets. For circular connectors, the main methods are threaded coupling, bayonet coupling, and push-pull (ball-lock) coupling. Threaded coupling is the most common, offering advantages such as simple processing technology, low manufacturing cost, and wide applicability, but it has a slower connection speed and is unsuitable for frequent mating/unmating and rapid connections. Bayonet coupling has a faster connection speed due to the longer lead of its three bayonet slots, but it is more complex to manufacture and has a higher cost. Push-pull coupling is the fastest among the three connection methods; it does not require rotational motion, only linear motion to achieve connection, separation, and locking. As it belongs to the straight push-pull connection method, it is only suitable for connectors with low total separation force. It is generally more common in small connectors.

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