SN74ALS138ANG4

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Logic-signal switches, multiplexers, and decoders are important components in a variety of digital circuits. The SN74ALS138ANG4 is a high-speed advanced performance multiplexer/demultiplexer with integrated 3 to 8 line decoder. It is used for logic control of different types of applications such as controlled power, analog control, and other applications which require data transmission.

The SN74ALS138ANG4 is a triple 3−input multiplexer/demultiplexer. It consists of a 3−bit latch, 8−channel multiplexer, 3−input decoder, and 8 cold emitters. At the same time, it features three-state outputs, active-low enable inputs (G2,G1), low standby current, and low on-state resistance. With a very low propagation delay of 10ns typical at 5V, the SN74ALS138ANG4 is perfect for applications with high-speed requirements.

In terms of its application field, this device is mainly used for logic control in data transmission, such as controlled power, analog control, and other applications which require data transmission. It can also be used for multiplexing and demultiplexing applications for transferring data from a register to multiple locations. In addition, the integrated 3−input decoder further simplifies the design of decoder circuits.

Its working principle is very straightforward. The device is used in two configurations: as a multiplexer or as a demultiplexer. In the multiplexer configuration, the intersection of the G2 and G1 inputs of the multiplexer determine which of the 8 channels will be enabled. The channel selection is controlled by the 2 input data lines A and B. If both G2 and G1 are high, then the selected channel is enabled. In the demultiplexer configuration, the G1 input determines which output is enabled, and the A and B inputs determine which of the 8 outputs is enabled.

The SN74ALS138ANG4 is a versatile component with several application fields and an easy to understand working principle. With its high-speed operation, low standby current, and low on-state resistance, it is perfect for applications in data transmission, controlled power, analog control, multiplexing, and demultiplexing.

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