MC74ACT244DTR2

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The MC74ACT244DTR2 is an integrated circuit designed for use as an active resistor (buffer) for digital circuits. This IC is suitable for a wide range of applications from bus line driving to analog circuit interfacing.

The device has two independent tri-state outputs capable of sinking up to 15mA loads. The inputs are TTL/CMOS compatible and can accept up to 14V DC input signals. By operating the active resistor, the device can amplify and/or buffer the signals sent out to the output, providing improved noise immunity. The active resistor is able to regenerate switching signals to the TTL/CMOS logic levels.

The MC74ACT244DTR2 is most commonly used in applications which require isolation between input and output lines. It is also useful for driving large capacitive loads, for example found in LCD displays. This device works with non-inverting and inverting gates, as well as with transistors and FETs. The MC74ACT244DTR2 can also be used in analog circuits for level conversion between high voltages and low voltages, as well as for level shifting between TTL and CMOS logic levels. Additionally, the device can be used for multiplexing or controlling LED brightness.

The MC74ACT244DTR2 works by operating the active resistor at a low level, below the threshold of the outputs. The active resistor amplifies the voltage difference between input and output, hence it is common to refer to the device as an active resistor. The output voltage is adjusted by changing the input voltage, and the device can be used to turn on or off switch contacts or LEDs as desired.

The MC74ACT244DTR2 is available in several packages, including SOIC and SSOP. The SOIC package is most commonly used for logic circuits, while the SSOP is suitable for bus systems. The SSOP has longer leads, allowing the device to be mounted on boards with larger pins.

In summary, the MC74ACT244DTR2 is a versatile active resistor device suitable for a variety of applications. It can be used as a buffer to reduce noise, as a level shifter between high and low voltages, and as a switch contact driver. The device can also be used to control LED brightness or to multiplex input and output lines. In all cases, the device is able to improve the speed, accuracy, and noise immunity of digital logic circuits.

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