MC74AC244NG

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This article mainly introduces the application field and working principle of MC74AC244NG. MC74AC244NG belongs to the Logic - Buffers, Drivers, Receivers, Transceivers and this integrated circuit is used in various applications. It is also known as a “quad tri-state line driver/receiver” because it can be used as one or the other in the same system.

MC74AC244NG is made up of four independent edge triggered, D-type flip-flops with tri-state outputs, which are controlled by the logic levels applied to the true and complement data input. The output state of each flip-flop is determined by the levels of data inputs (D and /D) one set-up time prior to the LOW-to-HIGH clock transition. A LOW level on the reset (/R) input of each flip-flop will reset the outputs to the LOW state independent of the data inputs.

It is used for data transfer between various systems, components, and buses. It is a cost effective solution for enabling data transfer in systems, and is frequently used in embedded systems and consumer electronics. The integrated circuit is an absolute must when designs require high speed communication. MC74AC244NG is designed to drive bus lines or to multiple drivers while thereby reducing the load on drivers.

MC74A244NG is also designed to drive bus line to multiple items while taking care of set-up and hold times, as well as ensuring data is transferred in and out simultaneously. The output is an open drain and therefore, VCC can be applied to the output prior to being driven, to ensure the line is at VCC when the driver is enabled.

The working principle of MC74AC244NG is quite simple. It consists of four independent, edge-triggered, D-type flip-flops with tri-state outputs, which are controlled by the logic levels applied to the true and complement data input. The outputs of the flip-flops are controlled by the level of the data input D (data) and the compliment data /D (not data) one set-up time prior to the LOW-to-HIGH clock transition.

The outputs of MC74AC244NG can be multiplexed up to 4 lines while taking care of their set-up and hold times. A LOW level on the reset (/R) input of each flip-flop will reset the outputs to the LOW state independent of the data inputs.

In summary, MC74AC244NG is an important integrated circuit which can be used in various applications. It can be used as one or the other in the same system, enabling data transfer between various systems, components, and buses. Its working principle is quite simple and it comprises of four independent edge triggered, D-type flip-flops with tri-state outputs.

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