SN74LV74ADRG4

Max Propagation Delay @ V, Max CL:	9.3ns @ 5V, 50pF
Base Part Number:	74LV74
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TA)
Input Capacitance:	2pF
Current - Quiescent (Iq):	20µA
Voltage - Supply:	2 V ~ 5.5 V
Current - Output High, Low:	12mA, 12mA
Trigger Type:	Positive Edge
Series:	74LV
Clock Frequency:	140MHz
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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Introduction

The SN74LV74ADRG4 is a dual D-type flip-flop exhibiting double data rate (DDR) latch characteristics designed for use in 3.3 V systems. The LV74A combines a flip-flop circuit for data storage with RAM (Random Access Memory) capability and dual in-line package (DIP) for high density packaging. This flip-flop device contains two separate 1-bit latches, each with a data capture capability. The device is provided with separate clear and reset inputs, each of which can be used to initialize either the A or the B latch or both. The device also has a "dual" data bus arrangement that allows for both data and address selection. In addition, the device can also be used in a system with any combination of logic level (open-drain) or high-to-low (H2H) logic levels.

Application Fields

SN74LV74ADRG4 can be used in a variety of applications, such as:

• Communication equipments such as mobile phones, routers and modems
• Automatic machines with network control capability
• Automotive systems and railway traffic control systems
• Industrial systems, such as digital cameras and medical equipments
• Embedded systems, such as intelligent toys and home appliances
• Multimedia applications, such as LCD monitors and game consoles

Working Principle

The SN74LV74ADRG4 operates on two data bus lines A0 and B0. The A0 and B0 are both fed into the input latch A and B respectively and the stored data is then stored in a single latch. These two Latches A and B operated independently of each other, but they share a common clock, which will cause either of them to change state simultaneously. When the clock input goes from low to high, the input data is latched. When the CLR is low, the output of the latch A and B is cleared and the pre-existing data is replaced by the new data.The reset input is also asynchronous and will reset the latch without waiting for operations to be completed. This reset function can be used in systems where the output cannot be determined until the time of operation is known. The SN74LV74ADRG4 can also be used in systems that require data storage. This can be done by using the DQ output, which can be used to store data in RAM. The device also has another input, called “D”, which is used to control the state of the input latch. When this input is high, the latch will latch the data until it is ready to transfer the data to the output. When it is low, the latch will reset and the data will not be transferred. This control input can be used to ensure that the data is transferred to the desired output latch.

Conclusion

The SN74LV74ADRG4 is a dual D-type flip-flop with DDR latch characteristics designed for use in 3.3 V systems. This device can be used in a variety of applications such as communication equipments, automatic machines, automotive systems, industrial systems and digital cameras. The device has two data buses A0 and B0, as well as separate clear and reset inputs, which can be used to latch and reset data. In addition, the SN74LV74ADRG4 can also be used to store data in RAM. With its versatile features, this device is suitable for a wide range of applications.

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