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74LS257 Quad 2-Input Multiplexer Tri-State IC (74257) DIP-14 Package

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Description

  • Function: The 74LS257 selects data from two sources (input A or input B) for each of the four multiplexers, based on the select (S) pin. Each multiplexer can route one of the two input signals to the output.
  • Tri-State Outputs: It has three-state (high-impedance) outputs controlled by the Output Enable (OE) pin, which allows multiple devices to share the same output lines.
  • Package: Available in a DIP-14 (Dual Inline Package), making it easy to integrate into standard breadboards or through-hole PCBs.

Features

  • Quad 2-Input Multiplexer: It has four separate multiplexers, each capable of selecting between two input sources.
  • Tri-State Outputs: The three-state output configuration allows for easy bus driving when the device is not selected.
  • TTL Compatibility: Compatible with TTL logic levels, making it ideal for use in systems with standard TTL components.
  • Fast Switching: Ensures quick data selection with low propagation delay.
  • Select and Enable Control: The device uses one select pin (S) to control which input (A or B) is routed to the output for all four multiplexers and one output enable (OE) pin to control the three-state output.

Specifications

  • Supply Voltage (Vcc): 4.75V to 5.25V (typically 5V)
  • Input High Voltage (VIH): 2V minimum
  • Input Low Voltage (VIL): 0.8V maximum
  • Propagation Delay: Typically around 15 ns from input to output.
  • Current Consumption: Low power consumption due to the LS (Low Power Schottky) technology.
  • Tri-State Output Enable Time: Approximately 20 ns.
  • Package Type: DIP-14 (Dual In-line Package)
  • Operating Temperature Range: 0°C to 70°C (commercial grade)

Note

* Product Images are shown for illustrative purposes only and may differ from actual product

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