74HC4851BQ-Q100,11

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Interface – Analog Switches, Multiplexers, Demultiplexers plays an important role in analog and digital data exchange. It is especially important in dealing with complex tasks. An example of such an Interface is the 74HC4851BQ-Q100,11. This article will discuss its application field and working principle.

The 74HC4851BQ-Q100,11 is a high speed CMOS Analog Switch IC designed to operate with a supply voltage range of 4.5V to 5.5V. It can be uniquely used in automotive applications where low-power dissipation and high-temperature capability are needed. With up to 11 Gigaohm isolation, it further goes to show the wide range of application fields it has.

At the same time, it can also handle high voltage and current signals and control multiplexers, switches, relays and buses around a circuit. An integrated charge injection feature prevents switching-induced offsets and minimizes the need for external filtering. In addition, an internal logic block keeps the input and outputs synchronized during switching, resulting in excellent repeatability.

In terms of working principle, the 74HC4851BQ-Q100,11 is an 8-to-1 multiplexer controlled by 2 select lines (S0 and S1). It consists of a high-speed CMOS multiplexer that allows up to 8 analog inputs (A0-A7) to be multiplexed and selected through the select lines. In addition, a small logic is built-in which helps to speed up multiplexing and output settling times. The device also features an Enable pin (EN) which enables or disables the output. This pin can be used to power save the device when not in use.

At the output, the switch showcases excellent static characteristics up to 11 Gigaohm isoaltion and ultra-low 25pF off-capacitance. In addition, it has an extremely low ON transition resistance (25 ohms typical). This enables it to accurately switch various analog signals, such as protocols and data, with minimal distortion. Last but not least, it is tolerant to up to 1000V ESD.

In conclusion, the 74HC4851BQ-Q100,11 is the perfect component for applications involving digital-to-analog and analog-to-digital communications. It is a perfect choice for automotive applications due to its high temperature capability, low power dissipation and ultra-high isolation. Moreover, its output static characteristic provide excellent distortion-free performance. With these factors in mind, it is no wonder why the 74HC4851BQ-Q100,11 is an invaluable tool for engineers.

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