74AC573MTCX

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The 74AC573MTCX is a part of a larger series of 3-state, octal D-type flip-flop ICs offered by Texas Instruments (TI); the “573” family. It is a thinner package version of the 74AC573, and is generally used when space is a concern. The IC includes a latch output enable terminal that can be used to entirely disable all outputs, effectively creating a 3-state, off condition with all channels disabled.

The 74AC573MTCX is typically used in applications prone to high EMI/RFI due to its low propagation delay and low lowower dissipation. With that being said, it is widely used in a variety of applications, such as aerospace, automotive, industrial control and more.

As far as its working principle, the 74AC573MTCX features eight flip-flop latches, operating under the D-Latch logic setup. Each latch consists of two CMOS latches, one for each half of the latch. A D-Latch takes an external input (D) and stores it, ignoring any further changes to the D-input. When the clock (CLK) is HIGH, the input will latch. Upon subsequent CLK-LOW events, the latched data remains unchanged, but the output(s) can be disabled by applying a LOW value to the OE (output enable) or LE (latch enable) input as needed.

The advantage of using this type of latch is that the data is stored even when the clock is inactive and both the OE and LE terminals are active (HIGH). This allows the latches to maintain their data across power cycles, without the need for volatile SRAM. Furthermore, the outputs are fully independent of each other; when in the disabled state, none of the outputs affect the others, regardless of their logic level.

When the 74AC573MTCX is in operation, the data is transferred on each positive-going clock edge. The output is enabled or disabled based on the state of the OE and LE inputs. If either or both inputs are HIHG, the output of the latch is disabled; if both inputs are LOW, the output is enabled.

Overall, the 74AC573MTCX is a powerful and versatile octal, 3-state flip-flop logic IC. It is built with differential multiplexers and dual cross-coupled CMOS latches, and it can be used across a wide array of applications. Due to its low power consumption and low EMI/RFI design, it is often used in applications requiring high speed and low power dissipation. Furthermore, it is designed to have a latch output enable terminal that can be used to entirely disable all outputs, effectively creating a 3-state, off condition with all channels disabled.

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