CD74HC4017EG4

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The CD74HC4017EG4 is a high-speed CMOS decade counter with decoded outputs. It is a 16 pin IC, and comes in a small outline package. By counting up pulses, the CD74HC4017EG4 can be used to count frequency or events, since the output can be used to trigger other circuits.

Application fields for the CD74HC4017EG4 include frequency division and counting, clock signal generation, timers, signal processing, and digital data processing. It is used in digital signal generator circuits, where it can be used to generate pulse waves.

The CD74HC4017EG4 works by taking an input signal in the form of square waves, which are then counted according to the clock signal, generating the decoded output to the other side. The decoded output is composed of multiple bits, represented in binary code (9-bits total). The output then produces a corresponding voltage output in proportion to the data present at the input.

The CD74HC4017EG4 can be used to divide a clock frequency by an integer number (2, 3, 4,…) to obtain one or more output clock signals whose frequencies are lower than the input frequency. When using counters, the input clock signal should be applied to the Clock Page (CP) pin and the output of the previous stage to the Reset (R) pin. The output pins and the count are reset to 0 when the Reset pin is at a logic low state.

The CD74HC4017EG4 can be set to different modes, such as Up-Count, Down-Count, and Echo Count, which can be selected from the pin layout. The up counter is a binary counters and the down counter is a 2’s complement binary counter, each type can be reset to zero when connected to a presetable counter.

The clock pin of a CD74HC4017EG4 can be connected either to a logic zero or to a logic one. When connected to a logic one, the count goes up; when connected to a logic zero, the count goes down. The count is reset to 0 when the reset pin (R) is at logic low. The echo count functions by counting up from 0 to the highest available number, then resetting to 0, and then counting down back to zero.

The CD74HC4017EG4 also offers multiple types of Outputs, such as Quadrature and Decoded Outputs. Quadrature Outputs are two-phase square wave signals, and Decoded outputs are binary encoded, with each output being either a logic high or logic low, depending on the number present. Outputs can also be connected that are dual-level NAND gates containing eight outputs, each output having a logic low when the count is an even multiple of 3.

In conclusion, the CD74HC4017EG4 is a versatile IC that can be used in digital circuit design. It can be used to count events and frequency, and generate pulse waves, clock signals, timers, and digital data processing. Additionally, it can be set to different modes, such as Up-Count, Down-Count, and Echo Count. It also offers multiple types of Outputs, such as Quadrature and Decoded Outputs. With its numerous features, the CD74HC4017EG4 is an invaluable tool for many digital circuit designs.

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