SN74LS257BNSR

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The SN74LS257BNSR is an integrated circuit that belongs to the Logic – Signal Switches, Multiplexers, and Decoders category. It is a multiplexer integrated circuit with 4 addressable input channels. When allows an input signal to be routed to one of the four available output lines.

The SN74LS257BNSR is a logic- level switching circuit with a single, active low select input "•S", four active low enable input "•G1 – G4", and four outputs. It operates on a wide range of input and output voltage, which ranges from 3.0V up to 15V. It also offers high speed switching performance with a typical propagation delay of 6 ns.

The SN74LS257BNSR is a non-inverting multiplexer, which means it has an inverted output. The output voltage polarity depends on the connected device. If it is connected to a TTL compatible device, the output voltage is a negative logic, or NT (negative true).

The SN74LS257BNSR is designed for use in a variety of applications where a poor logic level or poor logic level compatibility between input and output is required. Examples of typical applications include multiplexing, logic level conversion, logic level expansion, and logic level isolator. The device is used for switching and connecting circuits with different logic voltage level requirements. In a multiplexer application, the device allows for switching four different input signals to an output signal of constant voltage.

The SN74LS257BNSR can be used as a decoder. In this application, the four input channels are used to decode a four-bit binary address to one of four output lines. The selection of the output line is done by taking the logic level of the enable input to be active. The enable input is the binary combination of the four input address lines.

Another application for the SN74LS257BNSR is as a data selector. In this application, the four input channels are used to select one of four output lines. The input channels must be at the same logic level for the selection to take place. The output line is selected by taking the enable input to an active logic level.

The SN74LS257BNSR is a versatile integrated circuit that can be used in a wide range of applications from logic level multiplexing, logic level conversion, logic level isolation to logic level expansion. With a single active low select pin, four active low enable inputs, and four outputs, plus the wide range of input and output voltage, the SN74LS257BNSR is an ideal device for many applications in various industries.

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