74AHCT257D-Q100J

74AHCT257D-Q100J is a type of switch circuit that is used in integrated circuit digital system such as telecommunication systems and signal processing. 74AHCT257D-Q100J is a signal switch that is applied to multiplex (MUX) and de-multiplex (DEMUX) signals which can be used for both input/output data in integrated circuits.

Application Field

74AHCT257D-Q100J is used in many applications in signal processing and communications equipment, such as in modems, ISDN controllers, and in data communications, including cable and satellite transmissions. It is also used in military, aerospace and satellite applications for communications, control and data acquisition systems. 74AHCT257D-Q100J\'s broad usage and flexibility make it ideal for use in high performance and demanding applications.

Working Principles

The 74AHCT257D-Q100J multiplex/de-multiplex (MUX/DEMUX) is an active switch, with two quad 2-1 multiplexers. The 74AHCT257D-Q100J is controlled by a single logic signal, which enables the selection of one of four possible input signals (A, B, C, or D). The four possible inputs are selected and are sent to the appropriate output by an active low-to-high and a high-to-low signal transition. When the control signal is at a low level (0V), all four inputs are active, and all four outputs are determined by the logic state of the input signals. When the control signal is in the high state (4.5V to 5V), only one input/output pair is active. The active input is then sent to the appropriate output and the other three inputs/outputs are disconnected. High speed CMOS technology used for 74AHCT257D-Q100J allows for fast switching times and provides good noise immunity. The device is tolerant to power supply noise and has low power consumption. Additionally, 74AHCT257D-Q100J is protected against shorts and ESD as it has integrated EMI protection features. 72AHCT257D-Q100J is used in many different applications such as digital signal transmission, signal decoding, antenna systems, telecommunications, industrial automation and medical electronics. The device is also used in high-speed data communications such as ten GigE and Infiniband, as well as in memory circuits and in sensors.