SN74AC74D

Max Propagation Delay @ V, Max CL:	6ns @ 5V, 50pF
Base Part Number:	74AC74
Package / Case:	14-SOIC (0.154", 3.90mm 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:	Tube

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Introduction
SN74AC74D is a highly versatile and robust integrated circuit that is an important element of most electronic systems. It is a dual-flip flop, logic-level latch that can take in one logic-level input and output two logic-level outputs. This device is mainly used in applications that require logic-level functionality such as programmable logic controllers, analog-to-digital converters, data converters and processors, and other related equipment. The two flip flops (or latches) of the device offer the essential feature of latching the input bit. It allows the device to retain the bit until a new input bit is applied. By using the two flip flops, the logic can be more complex than one flip-flop on its own.

Logic - Flip Flops
Logic-level flip flops are the backbone of any digital system and are one of the basic building blocks of digital circuits such as computers, microprocessors, and other electronic systems. A typical flip-flop consists of two logic-level inputs, one at the S input and one at the R input, and two logic-level outputs, one at the Q output and one at the Q_ BAR output. Flip-flops can be either synchronous or asynchronous. Asynchronous flip-flops have no clock input, while synchronous flip-flops have a single clock input that is used to synchronize the output signals.

SN74AC74D Application Field and Working Principle
SN74AC74D is widely used in many modern applications that require logic-level functionality. Its two flip flops are used to latch and hold logic-level inputs, and its two logic-level outputs can produce two separate logic-level outputs. This is particularly useful for asynchronous and synchronous applications. In terms of its working principle, SN74AC74D is a logic-level latch that can be used to control two logic-level inputs and produce two logic-level outputs. The two logic-level outputs are driven by the logic-level inputs through a clock signal. The device can also be used in either a rising-edge triggered or a falling-edge triggered mode. In the rising-edge triggered mode, the output is triggered when the clock input rises and the output is de-asserted when the clock input falls. In the falling-edge triggered mode, the output is triggered when the clock input falls and the output is de-asserted when the clock input rises.

Advantages
SN74AC74D has numerous advantages over other similar devices. As a logic-level latch, the device is more robust than its analog counterparts, making it resistant to noise and other external interference. Additionally, the device is highly flexible, allowing for a wide range of applications. Furthermore, the device is input- and output-compatible, supporting the TTL and CMOS logic families. Finally, the device\'s two-flip flops make it well-suited for asynchronous applications, allowing the device to retain its outputs even if the clock signal is not available.

Conclusion
SN74AC74D is a highly versatile and robust logic-level latch that combines two flip-flops for improved functionality. It is used in many modern applications that require logic-level functionality and its many advantages make it a perfect choice for any digital system requiring latching capability. The two-flip flop configuration allows for greater flexibility, and its input- and output-compatibility support the TTL and CMOS logic families. The device is highly robust, making it well-suited for applications that require reliable and noise-free performance.

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