SN74LVC646ADW

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The SN74LVC646A-DW is a low-voltage, small footprint buffer/driver device. It is designed for up to 3.6V operation and can be used with signal speeds up to 75MHz. The device is a high-speed, low power, low voltage, 8-bit parallel-to-serial shift register suitable for bus-oriented applications.

The SN74LVC646A-DW is a single 8-bit buffer/driver that is used to interface a wide range of applications. It is ideal for interfacing between conventional logic circuits and high-speed buses and memory systems. The device can be used in both unidirectional and bidirectional applications. It is useful in buffering data paths to reduce the number of logic elements required to perform the same function.

This device is organized as 8 bits. Each bit is controlled by an individual output enable (OE). The outputs are placed in a tristate configuration when the output enable is high and in an active state register when it is low. The SN74LVC646A-DW also provides 3.3V CMOS compatible inputs. The device also includes a dedicated Clock enable (CE) input. The Clock enable allows the serial shift register to be disabled and the data path is in tri-state condition.

The device has four main applications fields; bus transceiver, buffer, serial-to-parallel converter and parallel-to-serial converter. As a bus transceiver, it can be used to convert from one type of logic family to another and also provides buffering. As a buffer, it can be used to isolate a line from a logic family, driving high capacitive loads, or for level shifting between two different voltage levels. As a serial-to-parallel converter, the device can be used to take serial data streams and convert them into parallel data streams. As a parallel-to-serial converter, the device can be used to take multiple inputs and convert them into a single serial data stream.

The working principle of the SN74LVC646A-DW buffer/driver device is straightforward; it takes in a parallel data set and then, when enabled, it drives the parallel data one bit at a time out of the device. When the Clock Enable pin is activated, the device starts to shift the parallel data out of the device serially, starting with the least significant bit. The device then repeats this process until all 8 bits have been shifted out. The device is then ready to repeat this process with a new set of data. The device continues to shift in the same direction until the clock is de-asserted, at which time the device is put into a tri-state condition.

The SN74LVC646A-DW is a low-voltage, small package buffer/driver device. The device is suitable for signals speeds up to 75MHz, and is ideal for interfacing between two different logic families or between multiple devices. The device is organized into 8 bits and allows for both unidirectional and bidirectional applications. The device also has four application fields; buffer, bus transceiver, serial-to-parallel converter and parallel-to-serial converter. It is an invaluable tool for a variety of digital logic applications.

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