SN74AC74PWRG4

Max Propagation Delay @ V, Max CL:	10ns @ 5V, 50pF
Base Part Number:	74AC74
Package / Case:	14-TSSOP (0.173", 4.40mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Input Capacitance:	3pF
Current - Quiescent (Iq):	2µA
Voltage - Supply:	2 V ~ 6 V
Current - Output High, Low:	24mA, 24mA
Trigger Type:	Positive Edge
Series:	74AC
Clock Frequency:	160MHz
Number of Bits per Element:	1
Number of Elements:	2
Output Type:	Differential
Type:	D-Type
Function:	Set(Preset) and Reset
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Logic - Flip Flops

Flip flops are a basic form of sequential circuit consisting of a group of two or more electronic switches connected such that the output of one switch changes the state of the other. A flip-flop can hold a single bit of data, making it a central component in many digital logic circuits. They are commonly used to "remember" the state of a signal. Flip flops are a type of memory element, carry digital signals from one circuit to another, and are used for time-delay circuit applications, for example, a time division multiplexer. In this article we take the SN74AC74PWRG4 as an example to explore its application field and working principle. The SN74AC74PWRG4 is a dual D-type flip-flop with a positive edge triggered input. It is designed for use in low power applications such as bus-oriented systems, signal routing, signal merging, and memory address and data applications. The device is designed to reject any undesired cross-interference between inputs on a single circuit and any noise caused by simultaneous switching of outputs on different circuits.The dual flip-flop SN74AC74PWRG4 consists of two clocked D type flip-flops connected in a "T-type" configuration. The clocked inputs are labeled C and C, and the data inputs are labeled D and D. An enable (EN1 and EN2) input is provided to control the state of the flip-flops, allowing the user to set or reset them as needed. Outputs are provided in both set/reset (Q and Q) and complementary (Q and Q) form. The outputs are enabled when EN1 and EN2 are LOW. The working principle of the SN74AC74PWRG4 D Flip-Flop is based on the fundamental concept of flip-flop circuit. The flip-flop is triggered by a clock, which triggers the right side of the circuit to the opposite output of the left side. This behavior is called a latch. The SN74AC74PWRG4 latch has two CLK inputs, CLK which is the positive edge trigger clock, and CLK which is the negative edge trigger clock. Now, let’s take a look at how this works. When CLK is applied, the output of the flip-flop will be set to the opposite value of D, which is the data input. The operation of the SN74AC74PWRG4 D Flip-Flop is essentially the same for both possible clock edges. The difference is that for the positive edge triggered clock the “functional” edge is the falling edge, and for the negative edge triggered clock the “functional” edge is the rising edge. This means that when CLK is HIGH, the output of the flip-flop should not change, no matter what the value of the DATA input is. Similarly, when CLK is LOW and a HIGH signal is applied to DATA, the output of the flip-flop will only change when CLK is taken LOW again. The SN74AC74PWRG4 is capable of handling asynchronous data and uses a three-state output structure, which ensures a data-independent tri-state output. This structure significantly improves the speed and the power efficiency of the device.In conclusion, the SN74AC74PWRG4 is a dual D-type flip-flop with a positive edge triggered input. It is used for low power applications and time-delay circuit applications. The device can operate both synchronously and asynchronously, and its three-state output structure provides better speed and power efficiency.

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