SN74ALS174N

Max Propagation Delay @ V, Max CL:	17ns @ 5V, 50pF
Base Part Number:	74ALS174
Package / Case:	16-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 70°C (TA)
Current - Quiescent (Iq):	19mA
Voltage - Supply:	4.5 V ~ 5.5 V
Current - Output High, Low:	400µA, 8mA
Trigger Type:	Positive Edge
Series:	74ALS
Clock Frequency:	50MHz
Number of Bits per Element:	6
Number of Elements:	1
Output Type:	Non-Inverted
Type:	D-Type
Function:	Master Reset
Part Status:	Active
Packaging:	Tube

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Logic - Flip Flops

The SN74ALS174N is a type of flip flop that is used as a memory device and generally employed in digital circuits. There are two main types of flip flops, the bistable and the monostable. The SN74ALS174N is a bistable type flip flop, which means that it has two stable states, in either of which it remains until changed by applied signals.Bistable flip flops are composed of two logic levels, called the Set and Reset states or S-R for short. In the case of the SN74ALS174N, the states are High and Low, with the High being the Set state and Low being the Reset state. The state of a flip flop is determined and set to High or Low according to the input signals applied and may then remain until further input is applied.The SN74ALS174N is further classified into two types: the Type 1 and Type 2. The type designation is based on the type of input that they accept. Type 1 devices accept active low inputs and type 2 devices accept active high inputs. Both a master-slave and a toggle (or flip/flop) version is available so the type designation applies to both types.The SN74ALS174N is the most commonly used during logic checkpoint designs and found in ECL logic families. It has a very low propagation delay, is relatively inexpensive and is widely reliable. The SN74ALS174N flip flop works on a two-level logic system as described earlier, where the Set and Reset, or S-R state, are the two stable states. The two-level logic is based on a single applied input and a single reset input, enabling the SN74ALS174N to be held in either state. An applied input will Set the device to the High state and a reset input will Reset the device to the Low state.The applied input and the reset input are important to the functioning of the flip flop, however, other inputs are also present. These include the Clock input, Clock Enable input and the Enable input. The Clock Input is the most important of these input signals, as it initiates state changes when required. The Clock Enable input is used to monitor the Clock input, enabling and disabling it as required. Lastly, the Enable input can be used to prevent state changes from occurring.The SN74ALS174N is a versatile device that is widely used in digital circuits and is capable of performing many different functions. It is an important tool for designers who are working on complex logic checkpoint designs, as it offers a high degree of reliability and excellent performance. The design and implementation of these devices are well documented, making them an ideal choice for many digital applications. In conclusion, the SN74ALS174N is a bistable, two-level logic flip flop device that offers a wide range of applications in digital circuits. It is the most commonly used device during logic checkpoint designs and is relatively inexpensive and reliable. It features a Set and Reset state, a Clock input, Clock Enable Input, and an Enable input which can be used to prevent state changes from occurring. Furthermore, the documentation on design and implementation of the device is readily available, making the SN74ALS174N an ideal choice for design and implementation in sophisticated digital applications.

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