74F245MTCX

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The 74F245MTCX is a Logic - Buffers, Drivers, Receivers, Transceivers type of chip designed by Fairchild Semiconductor. It is a 4-bit bidirectional transceiver that is capable of driving large bus lines while still maintaining low static and dynamic power. The 74F245MTCX provides low power, high speed logic to support the demanding performance of high speed logic systems.

Application Field

The 74F245MTCX is used for transmitting and receiving data over large and small bus lines in a variety of applications. One such application is in communication systems that require fast transmission and reception of data, such as in networking or optical communication systems. The 74F245MTCX can also be used in semi-permanent or temporary bus networks where the bus line needs to be reconfigured quickly and efficiently. Such applications include, but are not limited to, test and measurement systems, industrial automation, and automotive systems.

Working Principle

The 74F245MTCX is a transceiver with four logic channels, each of which is configured to operate in either input or output mode. In output mode, the 74F245MTCX can source up to 120mA at 12V. In input mode, the device will seek to maintain the logic levels on its inputs with a guaranteed minimum input current of 35mA. The logic levels of the device’s inputs and outputs are TTL compatible.

In addition to the bidirectional capabilities of the 74F245MTCX, the device features an enable port (EN). The EN port is used to control the direction of the device, allowing it to operate as either a 3-state or as a 2-state device. When the EN port is enabled, the device will operate as a 3-state device, allowing the logic level of the outputs to be controlled by the inputs. When the EN port is disabled, the device will operate as a 2-state device, in which the logic levels of the outputs are determined by the logic levels of the inputs.

The 74F245MTCX also features an active pull-down circuit that is designed to keep the outputs in the low state when the EN port is in the disabled state. This feature helps reduce the risk of having stray signals on the bus line as the bus lines are being reconfigured. When used in conjunction with the 74F245MTCX’s low power requirements and its high operating speed, this feature makes the device a very attractive choice for a variety of applications.

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