MC74HCT138ADTR2G

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The MC74HCT138ADTR2G belongs to the logic-signal switches, multiplexers and decoders family of integrated circuits (ICs). Developed and manufactured by ON Semiconductor, this 3 to 8 line decoder can be used to discover various functions with applications ranging from signal selection, signal decoding, signal routing, multiplexing and other applications with discrete signal lines.

The MC74HCT138ADTR2G integrated circuit features SY system, low power Schottky TTL circuits, in a 14-pin DIP package. All the functions come with outputs from Y0 to Y7. The decoder provides 8 output lines and can be used to decode signals up to locations of 256. It provides a maximum frequency operating at 10MHz and is compatible with TTL logic levels.

The MC74HCT138ADTR2G decoder uses an enable input that activates the decoder when enable is set to a logic-1 level. An enable option simplifies system logic, by enabling the user to turn on and off the function. It is typically used in applications where a single decoder is used to route multiple signals. The enable input will shut off that line, so that another line can be accessed without having to shift the devices of other circuits.

Some of the key applications of the MC74HCT138ADTR2G integrated circuit include signal selection, signal decoding, signal routing, multiplexing and other applications with discrete signal lines. It has several applications such as, system control, color graphics monitor and multi-level data board connections. Other applications include address decoding, industrial controllers, printers, computer networking, encoders, decoders and multiplexers.

The working principle of the MC74HCT138ADTR2G IC starts with the inputs that contain encoded signals. The enable input (E) is held in the logic-0 level. The input lines (A1 and A2) are then applied with the binary-coded signals to be decoded. The output of the decoder corresponds to the binary code, which is determined from the binary coded inputs (A1, A2). Any of the eight output lines can be used to select/deselect depending upon the external circuit connection.

The MC74HCT138ADTR2G decoder is a cost effective and reliable device, with features like low power are an ideal choice for applications such as multiplexers, color video monitor, address decoding and market-level data board connections. It is also used in computer networking, encoders, decoders, printers, and industrial controllers. This integrated circuit has numerous applications due to its robust design and ample functionality.

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