CD74HC238EG4

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Logic-signal switches, multiplexers, decoders are widely used in communication and control applications because of their capability to select and route multiple different signals over a single connection. The CD74HC238EG4 is a general purpose logic-signal switch, multiplexer, and decoder which provides up to eight multiplexing functions. This device features low-power Schottky-clamp technology and provides a high-performance CMOS multiplexer/demultiplexer solution for typical applications as well as in video recording systems.

The CD74HC238EG4 is a three-state device that offers an 8-channel multiplexer/demultiplexer logic function. The device uses a two-pin control input that allows for the selection of a particular input and provides a three-state output. The 8-channel multiplexer provides 8 inputs and 1 output and can be used to multiplex signals from 8 different sources. The device also has an active-low enable input which can be used to enable or disable the device.

The CD74HC238EG4 is designed to provide low-cost, low-power logic-signal switching and multiplexing. It is available in a 24-pin narrow SOIC package and works over a wide range of supply voltages, from 1.8V to 5.5V. The device features an improved data path design over other multiplexers, which allows for improved data throughput. The device is designed for operation up to 50MHz, making it suitable for high-speed applications.

The CD74HC238EG4 works by using two select lines, \'SELx\' (x=1,2), to select among one of the 8 possible combinations of inputs. The two select lines allow for a total of 8 possible combinations of 8 inputs. Input signals are routed to the output based on which combination of select lines is applied. When one of the SEL lines is low and the other is high, then the output will be associated with the input of the low SEL line. If both SEL lines are low or high then the output is disabled.

The CD74HC238EG4 also features an active-low enable input which selects one of the 8 available input combinations when it is asserted. The enable pin can also be used to disable the output when set to a high level. The device features an open-drain output which is used to provide an active low output. The open-drain output is capable of sinking currents up to 10mA, so it can be used to drive LED indicators or other such loads without the need for additional components.

Overall, the CD74HC238EG4 is a cost-effective device for providing logic-signal switching and multiplexing with low-power operation and wide supply voltage range. It is available in a compact 24-pin narrow SOIC package and is designed for operations at up to 50MHz, making it an ideal choice for high-speed applications. The device features an active-low enable pin which allows the device to be enabled or disabled and an open-drain output which is capable of sinking currents up to 10mA enabling it to be used to drive LED indicators or other such loads.

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