SN74HC74N

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Logic - Flip Flops is a type of digital circuit with memory state, which is widely used in data processing, intermediate storage, and decision making of digital systems. SN74HC74N is a popular dual-edge-triggered positive-edge-triggered flip-flop integrated circuit. This article will look into its application fields and working principles.

SN74HC74N applications include data storage, shift register, half-adder, latch circuits, ring counter and frequency divider. The first three are the most popular applications. As a data storage circuit, SN74HC74 stores one bit of data every time a positive edge voltage is given as input to its trigger pin. As a shift register, it’s used to move data from one point to another. Finally, as a half-adder, the SN74HC74 adds two bits of data and produces one bit of truth output.

SN74HC74N’s working principle is based on digital logic. When the trigger pin is held high, the logic state of Set and Reset inputs is used to determine the logic state of two output pins. There are two possible conditions for Set/Reset: both LOW, either HIGH. If both inputs are LOW, the output pins will remain in the previous state; if either Set or Reset is HIGH while the other is LOW, the outputs will be set or reset accordingly. Furthermore, the J and K input pins are used to control the output pins when the trigger pin is in low state. For example, when J and K input pins are both LOW, the output pins will maintain the same state regardless of the previous state; when both J and K input pins are HIGH, the output pins will toggle.

In summary, SN74HC74N is a dual-edge-triggered positive-edge-triggered flip-flop integrated circuit with popular applications in data storage, shift register, and half-adder. Its working principle is based on digital logic and the logic state of Set and Reset inputs. Furthermore, the J and K input pins are used to control the output pins when the trigger pin is in low state.

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