HEF4518BT,653

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The HEF4518BT,653 logic devices are part of a family of monolithic logic counters, dividers and frequency-controlled oscillators. It is generally used in applications such as digital signal processing (DSP), clock and timing design, and data conversion.

The two main features of the HEF4518BT,653 are the synchronous 4-bit binary up/down counter and the pulse accumulator. The synchronous 4-bit binary up/down counter allows the user to count in binary up or down, with the output value increasing or decreasing depending on the direction selected. The pulse accumulator is an 8-bit counter designed to count successive input pulses and provide an 8-bit output representing the pulse count. This feature allows for extremely accurate timing and counting applications.

The device is also equipped with several control modes, including: single-shot, transparent latch, toggle, and hold. These control modes allow the user to control the output of the device depending on the application. The single-shot mode is used to count successive input pulses and provide a single output while the transparent latch mode allows the user to hold the output of the device regardless of the input. The toggle mode allows the user to toggle between binary high and binary low and the hold mode holds the last count when the input is inactive.

In addition to the synchronous 4-bit binary up/down counter and pulse accumulator, the HEF4518BT,653 logic devices also feature an oscillator input and an asynchronous reset/preset inputs. The oscillator input is used to provide clock pulses to the device and to set the frequency of the output. The asynchronous reset/preset inputs can be used to reset the counter or to preset it with a value.

The HEF4518BT,653 logic device is a versatile, multi-purpose counter and divider for any logic applications. The combination of its 8-bit binary output, synchronous 4-bit binary up/down counter and pulse accumulator, and control modes provide the user with a powerful and accurate device for a variety of timing and counting applications.

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