SN74AS74AD

Max Propagation Delay @ V, Max CL:	9ns @ 5V, 50pF
Base Part Number:	74AS74
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Current - Quiescent (Iq):	16mA
Voltage - Supply:	4.5 V ~ 5.5 V
Current - Output High, Low:	2mA, 20mA
Trigger Type:	Positive Edge
Series:	74AS
Clock Frequency:	105MHz
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:	Tube

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The SN74AS74AD is a logic-based flip-flop device used in digital circuits. It is used to store bits and can be used for synchronizing and sequencing operations in digital circuits. The SN74AS74AD is a Positive Edge-Triggered D-type Flip-Flop with Asynchronous Set and Reset and with Input Clocking.The SN74AS74AD is made up of two basic components: the S-R Latch and the Clock-edge Detector. The S-R latch is a type of logic circuit whose function is to capture the state of two digital inputs, called the Set (S) and the Reset (R). This is done by capturing the instantaneous values of the two inputs. Whenever either the Set or the Reset input transitions from 0 to 1, the latch output changes accordingly.The Clock-edge Detector is a circuit that senses the rising edge (or falling edge) of an input signal and then generates a pulse or a high pulse level. This pulse or high pulse level is used to inform the S-R Latch about a rising or falling edge on its input signal, or an input change.The SN74AS74AD is ideal for use in a variety of applications such as counters and asynchronous data transfer. It can be used to quickly toggle a signal from one state to another or from values of 0-1 in a synchronous manner. The device is also able to carry out data transfer operations between multiple devices, providing greater speed and accuracy than more complex approaches such as ad hoc protocols.In terms of structure, the Sn74AS74AD is simply a two-bit device with its two outputs connected together and both driven by the same signal source. The device is organized into two input and two output ports. The two input ports are known as the S and the R. The S and the R are responsible for driving the two outputs, referred to as Q and ~Q (the inverse of Q). The first input port, known as the Set (S), allows the signal to be set to either a low or high state. The second port, known as the Reset (R), allows the signal to be set to either a low or a high state. The concurrent state of the input signal(s) drives the Q output, which can then be used to feed other logic gates.The SN74AS74AD is often used in combination with other flip-flop devices such as the SN75169, SN75178, or the SN74AS74AD/2 to create a synchronized signal generator. This is done by connecting the output of one flip-flop with the input of another. When connected in this way, the output of the previous set is used as the input signal for the next set, thus synchronizing the output signal with the input signal.Finally, the SN74AS74AD can be used with the SN74AS74AD/2 to create a circuit which can count up or down. This is done by connecting the output(s) of the SN74AS74AD/2 to the S and R inputs of the SN74AS74AD. As the SN74AS74AD/2 outputs are changing, the inputs to the SN74AS74AD are also changing, which in turn causes the output (Q) to sequentially change, thus creating a count up or down.The SN74AS74AD is a powerful and versatile device and is very useful in a wide variety of digital circuit applications. It allows designers to quickly and easily implement complex synchronizing and sequencing operations. Thanks to its ability to accurately carry out data transfer operations between multiple devices, the SN74AS74AD is finding increasing applications in the domains of industrial automation, aerospace, and communication systems.

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