74HCT4851BQ,115

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74HCT4851BQ,115 Application Field and Working Principle

The 74HCT4851BQ,115 is a digital multiplexer, part of a broad family of digital multiplexers, demultiplexers, analog switches, and level translators. It belongs to the Interface - Analog Switches, Multiplexers, Demultiplexers category in electronics. It primarily acts as a switch for analog and digital circuits, enabling multiplexing of a single input channel into multiple output channel configurations and demultiplexing multiple input channels into single output channels. It is primarily used to reduce the number of signal lines of a single device while allowing more than one input, allowing faster data transmission and ultimately better performance.

In operation, the device can switch an input signal line between various destinations. Some example applications of the 74HCT4851BQ,115 are: data acquisition, monitoring, and control; signal routing for audio/video systems; and serial data transmission. The 74HCT4851BQ,115 can also be used in applications where there is only one data input, such as when multiplexing a signal into two different outputs. The device can switch between being active or inactive, depending on the circuit configuration, allowing it to be used in a variety of different applications.

The 74HCT4851BQ,115 is based on the CMOS logic technology and has a power supply voltage rating of 3 - 15 V. It has an operating temperature range of -40°C to 85°C and is available in both SOIC and PDIP packages. It has an output resistance of 6.5Ω and a maximum output current of 25mA. The device is designed to be able to switch high frequency signals up to 300MHz, while providing low power requirements and low ON resistance.

The device features three power supply pins: VDD, VSS and VEE. VDD is the main power supply and can be either 3 - 15 V. VSS is the ground supply and should be connected to the circuit ground. VEE is the intermediate power supply and is used to adjust the output voltage when using an electric motor as the actuator. The device also has six input pins, labeled I 0 - I 5, for a total of 16 possible input combinations. Finally, the device has four control pins, labeled EN, DIR, SEL 0 and SEL 1 for a total of four different signal selection combinations.

The device operates in either an active or inactive state. In the active state the signal can be switched from one set of inputs (I 0 - I 5) to the corresponding output (O 0 - O 5). In the inactive state, the signal is not allowed to pass through the device. The device is controlled by the three control pins, EN, DIR, SEL 0 and SEL 1. When EN is set to logical high, the device is enabled and can operate in either the active or inactive state. DIR is used to determine the direction of the signal, i.e. when DIR is set to logical low, the signal is routed from the inputs to the corresponding outputs and when DIR is set to logical high, the signal is routed from the outputs to the inputs. SEL 0 and SEL 1 are used to determine which signals are routed between the inputs and outputs.

In summary, the 74HCT4851BQ,115 is a digital multiplexer, demultiplexer, analog switch, and level translator that is widely used to reduce the number of signal lines of a single device while allowing more than one input, allowing faster data transmission and ultimately better performance. It features a power supply voltage rating of 3 - 15 V, operating temperature range of -40°C to 85°C, output resistance of 6.5Ω and a maximum output current of 25mA. It is designed to be able to switch high frequency signals up to 300MHz, while providing low power requirements and low ON resistance. These capabilities make it perfect for a wide range of applications, from data acquisition and monitoring to audio/video system signal routing and serial data transmission.

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