74ACT521SJ

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The 74ACT521SJ is a low-power logic integrated circuit (IC) designed for general-purpose levels translation. It is a comparator IC, which is commonly used in wide variety of applications where a logic signal needs to be translated from one level to another level. The device is used to compare voltage levels and generate corresponding outputs.

The 74ACT521SJ comparator IC features two 8-bit differential stores and two corresponding 8-bit output drivers. The comparator IC is powered by a single 5V supply and the differential input voltage is between 0 and 5V. The typical input current is 60µA maximum, while the supply current has a typical value of 200µA. The device has a rise or fall time of 10 ns, and is suitable for data transmission in asynchronous applications such as General Purpose I/O (GPIO) and serial communication. The device has multiple functions, including the ability to translate from TTL to 3.3V CMOS. The device also has an over-voltage protection, making it suitable for applications where transceivers are driven directly from CMOS logic.

The 74ACT521SJ is also used to provide level-shifting between different logic systems, such as between 5V and 3.3V systems. This is useful in applications such as automotive, remote sensing, and industrial controls, where signal integrity needs to be maintained. The comparator IC also has an internal Schmitt trigger, which allows it to drive the outputs of large capacitive loads. This makes the comparator IC an ideal choice for high-speed data transmission, such as in automotive and remote sensing applications.

The working principle of the 74ACT521SJ comparator IC is simple. It consists of two input pins and two output pins. When the input signal on one of the input pins is less than the other, the corresponding output pin is pulled low, and when the input signal is greater than the other, the output pin is pulled high. This level comparison is performed with the help of an internal comparator, which is powered by a single 5V supply. The logic thresholds are programmable. The device has an internal schmitt trigger, which provides increased noise immunity and improved signal integrity. The device is ready to use after connecting to the power supply and connecting the desired input and output pins.

In conclusion, the 74ACT521SJ is a low-power comparator IC, which is commonly used in wide variety of applications requiring level shifting, level translation, and improved signal integrity. It features two 8-bit differential stores and two corresponding 8-bit output drivers, and is powered by a single 5V supply. The device has an internal Schmitt trigger, which compares the input voltages and provides an output based on the comparison. The device is suitable for a wide range of applications, including automotive, remote sensing, and industrial controls, where signal integrity needs to be maintained.

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