74HC238DB,112

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Logic-signal switches, multiplexers, and decoders are essential components for a wide range of applications. The 74HC238DB,112 is one of the most well-known and widely used of such components. It is a 3-to-8 bit decoder/demultiplexer with a voltage-level translator, especially suitable for low-voltage applications.

The 74HC238DB,112 is composed of a control logic and three 8-bit buffers. The control logic uses A, B, C and three Enable inputs to select one of 3 - 8 output lines. A, B and C are encoded as binary inputs and form an address code to determine the required output line.

The 74HC238DB,112 has many applications, ranging from basic task to complex ones. It is largely used for low-speed data routing and address decoding in memory and bus control systems. It is also used for address decoding in small computers and I/O control circuit. The device is ideal for applications such as waveform generation and audio/video channels switching.

In terms of working principle, the 74HC238DB,112 combines a bandgap voltage reference with a CMOS switching network to generate eight discrete outputs. When the appropriate binary address is presented, the desired output will be enabled. The chip can also be used to connect with the lower half of a 8-bit bus, providing high fan out capability.

The 74HC238DB,112 is suitable for demanding applications that require low-voltage and low-power operation. When operated under a wide range of power supplies, the device maintains an outstanding static and dynamic characteristics. In terms of static characteristics, it has been tested and found to have a logic high level of 2.0V and a logic low level of 0.8V.

Furthermore, the device has its own power-saving modes, ensuring low power consumption. At 66MHz, the device’s active current of typical 19.5mA is 2.5mA lower than the TTL logic family at the same frequency. Additionally, its standby current is as low as 3.2μA.

Overall, the 74HC238DB,112 is a reliable and versatile decoder/multiplexer, ideal for a wide range of general-purpose applications. Its easy-to-implement technology, low power consumption, and low voltage operation make it a popular choice among engineers and manufacturers.

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