SN74CBTD3861DBR

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Logic - Signal Switches, Multiplexers, Decoders

The SN74CBTD3861DBR is a logic signal switch, multiplexer, and decoder device with three 8-bit input buses and two 8-bit output buses, manufactured by Texas Instruments. It is a multi-bus arbiter device that combines a 3:8 decoder, 8:1 multiplexer, 1:2 (SSI/SPI/QSPI/Micro-Wire) decoder, and three 8-bit priority encoders into one 24-pin device. By combining these functions, this device offers a wide range of applications, such as communication protocols, digital and analog I/O control, clock control, and memory access control.

Application Field

The SN74CBTD3861DBR is a versatile device and is used in a variety of applications in the industrial, automotive, and aerospace fields. It can be used in communication applications such as serial interfaces, as well as clock and data distribution designs and bus arbitration applications. It is also used in digital and analog I/O control, microprocessor/microcontroller I/O expansion, memory access control, and system level monitoring.

Working Principle

The SN74CBTD3861DBR has three 8-bit input buses, two 8-bit output buses, and seven control inputs. The three input buses are used to select the output bus and enable the three 8-bit output encoders. The two output buses provide eight different outputs, depending on the input buses. The control inputs are used to enable the bus arbiter function, enable chip-select decoding, and control the polarity of the output buses.

The bus arbiter function selects one of the three input buses and provides higher or lower priority encoding based on how these three buses are set up. The chip-select decoding is used for selecting one or more of the eight chip-select inputs and connecting it to a particular output bus. The polarity control makes it possible to connect the output buses to either a low or high voltage.

The SN74CBTD3861DBR is a versatile device with a wide range of applications. Its combination of functions makes it ideal for communication protocols, digital and analog I/O control, clock control, and memory access control.

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