MC74HC573ADT

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Logic - Latches

The MC74HC573ADT is a high-speed, low-power octal D latch integrated circuit (IC) made by Motorola. It is used by logic circuit designers for general purpose applications and is designed to be used in combinatorial and sequential logic systems.

The MC74HC573ADT is designed for multiplexing data, serial-to-parallel, bit-swapping, output-buffering. It contains eight D-type latch structures, each containing a storage latch clocked by an individual active-low latch input signal. When the signal is held LOW at the clock input of the latch, the stored data is retained. When the clock is driven HIGH, the ingoing data is registered. The stored data is presented at the latch outputs after the clock signal is released.

The structure also has separate active-low reset inputs that, when driven HIGH, force all outputs of the latch to fall to their low-level state. A logic 0 at the latch enable is used to enable or disable all latch outputs.

The MC74HC573ADT is suited for multiplexing data, serial-to-parallel shift registers, parallel-to-serial data conversion, bit-swapping and output buffering applications, and for use in address/data latching. It can also be used to conveniently store parallel port data during each bit transmission and to provide a handy set of data bits from a single latch.

The MC74HC573ADT can be easily connected into a circuit via the chip’s 16-pin Dual In-line Package (DIP). It operates over a temperature range of 0°C to 70°C and consumes relatively little power at 3.6 mW per D latch. Its maximum supply voltage is 6V and its dynamic operating temperature is - 55°C to 125°C.

The MC74HC573ADT works on the basis of ‘bouncing logic’, which involves swapping logic states between one latch and the next. The logic is then applied multiple times to different latches, with the result that the target latch will display the desired data as it gets ‘bounced’ around the circuit. In this way, the MC74HC573ADT can be used to multiplex data and receive input from many different sources in parallel.

In short, the MC74HC573ADT is a multi-purpose latch IC that offers a flexible and efficient way of dealing with data in a wide variety of applications. Its logic structure makes it simple to design logic circuits that require buffering and multiplexing of data.

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