74ACT244SC

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74ACT244SC is a logic based buffer, driver, receiver and transceiver integrated circuit. This integrated circuit is manufactured and distributed by Texas Instruments, Inc. (TI) and provides a medium-speed, low-power integrated circuit solution to many communications applications.

The 74ACT244SC is an 8-bit bus transceiver. It may be used as either a bus driver or bus receiver, depending on the logic levels present at the direction control (DIR) pin. It is designed to be used as two 4-bit bidirectional transceivers with separate output-enable (OE) controls for each section.

The 74ACT244SC is a low-power device capable of driving up to 15 low-power Schottky (LS) families or 10 standard TTL loads. Outputs are capable of sinking or sourcing up to 16 mA with a VOH voltage of 2.4V. Inputs will accept up to 3.6V and have a Schmitt trigger action for noise immunity and increased noise margin for high speed applications.

Pin layout of the 74ACT244SC consists of eight inputs, eight outputs, two direction pins, four output-enable pins, and two VCC/VEE pins. Since the direction pins determine the transceiver’s direction of transfers, the chip can be used to either transmit or receive data on the same set of shared lines.

The 74ACT244SC can operate in two different modes: normal mode and high-impedance mode. In normal mode, data is transmitted and received as normal and in high-impedance mode the outputs are in the “off” or disabled state, allowing only the inputs to perform data transfer. This “three-state logic” operation is especially useful in the I/O (input/output) buses of many computer systems where multiple devices are connected to the same bus.

The various inputs and outputs of the 74ACT244SC can be crossed over to allow data flow in opposite directions. This allows the circuit to transmitter data bidirectionally. The direction control (DIR) pin defines which port is a transmitter and which port is a receiver. When the direction control signal is set to logic low, the inputs on the A port become receivers, and the outputs on the B port become drivers and vice versa when the signal is set to logic high.

The output-enable (OE) pins provide a control for the output drivers. When OE is set to low, data flows as expected, but when it is set to high, the output line is placed in a high-impedance state, which eliminates any current path from that output. This allows the IC to be used in data multiplexers and switches.

The 74ACT244SC can be used in a variety of applications, such as digital signal processing, serial communications, parallel data transfers, or any application that requires bidirectional data transmission. It is often used as a bus transceiver or a bus buffer in system architectures that are required to transfer data between input and output devices while maintaining signal integrity. In addition, it has a wide range of power supply voltages, making it suitable for a variety of applications that require low power consumption.

In summary, the 74ACT244SC is an integrated circuit that is intended to serve as a buffer, driver, receiver, and transceiver for communications applications. It is capable of delivering data bidirectionally and provides a low-power solution for many applications. It is a very versatile integrated circuit that can be used to perform a variety of tasks.

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