SN74LS240N

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The SN74LS240N is a second-generation Schottky TTL (Transistor–Transistor Logic) integrated circuit, manufactured by Texas Instruments. It is a TTL inverting buffer, and part of the 74LS00 family of logic ICs (Integrated Circuits). The SN74LS240N is able to provide high-speed logic transitioning and sharp data edges, regardless of the design of the logic board. It is a versatile logic device featuring individually-inverted buffers, each exhibiting a low power consumption, high speed, and high input impedance.

The SN74LS240N is primarily used to increase the load capability of a circuit, or as an output buffer for interfacing between two circuits with different electrical and/or logic characteristics. It can be found in a range of applications such as automotive control systems, timing circuits, or logic networks.

An SN74LS240N buffer consists of six individual buffers, each of which is isolated from the others. Each buffer is designed to receive a single signal and output its inverted version. The buffered output is provided in TTL format, and its signal is present only while the input signal is in the high or “true” state.

The SN74LS240N design includes numerous unique features that can be used to increase the reliability, performance, and accuracy in a variety of applications. It has a low propagation delay time of only 9ns and a wide voltage swing of 34V. The SN74LS240N is CSD (Clamp-State Drain) protected against input displacement voltages up to 11V, providing additional protection in circuits with high-impedance inputs.

The SN74LS240N also features Schottky-type input protection, allowing isolation between the inputs and outputs up to 25V. This level of input protection makes the chip suitable for use in applications that require high levels of isolation between the inputs and outputs of the circuit, such as automotive systems.

The chip also includes output saturation protection (OSP) circuits, which are designed to protect the outputs from being overdriven. This function is extremely beneficial in applications where switching noise immunity is an issue.

The SN74LS240N utilizes TTL-compatible current-limiting buffers, which allow for increased compatibility with a wider range of TTL devices. It also features a thermal shutoff circuit designed to protect the logic circuit from overheating. In addition, the chip features a 3-state option, which allows for the choice of either high or low active outputs.

In conclusion, the SN74LS240N is an excellent logic device for many applications, including automotive systems, logic networks, and timing circuits. It provides users with high-speed transitioning, low power consumption, high input impedance, input protection up to 11V, and output saturation protection that ensures the outputs are not overdriven. Above all, it is an cost effective and reliable solution for those looking to increase the capability of a circuit or interface between circuits with different electrical and/or logic characteristics.

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