MC74HCT573ANG

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MC74HCT573ANG is a popular logic latch device and belongs to the family of Logic-Latches. It is a high-performance, open-drain 9-bit bidirectional I/O latch suitable for a wide variety of applications. As a general-purpose device, the MC74HCT573ANG provides 9 data inputs (D0-D8) and 9 outputs (Q0-Q8). It is a protocol-independent device, meaning it can be used for tasks without regard for data format.

MC74HCT573ANG features low voltage operation, supporting a flight path of +3.3v or +5v, with a maximum operating temperature of 125°C. Additionally, it possesses Schmitt Trigger devices on all inputs, providing improved noise rejection and improved data-transfer stability. Its maximum data-output current is limited to 10mA at +5V and 15mA at 3.3V, and its minimum power supply voltage is 1.64V.

In terms of applications, the MC74HCT573ANG is often used to interface between digital circuitry and switch devices, such as pushbuttons. Additionally, due to its open drain design, it is often applied when bidirectional bus communication is necessary. Furthermore, it is versatile enough for use in different types of environment, from static RAMs to programmable logic controllers.

With respect to the working principle of the MC74HCT573ANG, it is a semi-latching device. When its data input (D) is at logic “1”, the output (Q) will be the same logic “1”. However, upon slight changes to the data input (D), its output (Q) will switch back to its previous low-level state. This temporary latching feature is beneficial when preventing false readings during a switching operation. That is, it stores the current state of the data input (D) until a new one is available. It should be noted that the MC74HCT573ANG is a static device, meaning it requires no power to retain the latest data. Additionally, all inputs will remain disabled during power-on.

In conclusion, due to its versatility, low voltage operation, high-performance, and open-drain design, the MC74HCT573ANG has a variety of applications and is categorized into the Logic-Latches family. The working principle of the MC74HCT573ANG is based on a semi-latching technique, whereby it stores the current state of the data input until a new one is available.

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