SN74HCT374DWRG4

Max Propagation Delay @ V, Max CL:	32ns @ 5.5V, 50pF
Base Part Number:	74HCT374
Package / Case:	20-SOIC (0.295", 7.50mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Input Capacitance:	3pF
Current - Quiescent (Iq):	8µA
Voltage - Supply:	4.5 V ~ 5.5 V
Current - Output High, Low:	6mA, 6mA
Trigger Type:	Positive Edge
Series:	74HCT
Clock Frequency:	40MHz
Number of Bits per Element:	8
Number of Elements:	1
Output Type:	Tri-State, Non-Inverted
Type:	D-Type
Function:	Standard
Part Status:	Active
Packaging:	Tape & Reel (TR)

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The SN74HCT374DWRG4 is classified into the Logic – Flip Flops category. Flip flop circuits are used in a plethora of applications from the seemingly simple task of creating mechanical oscillators to the complex tasks of controlling sophisticated digital systems. Flip flops keep track of binary information, which is an essential part of many digital and logic circuit designs. The SN74HCT374DWRG4 is an octal D-type flip-flop, a type of logic circuit that consists of eight identical flip flop circuits such as those found in the 74HC374. It is manufactured by Texas Instruments, and is a member of the 74HC/HCT family. It operates down to 1.65 V and accepts inputs from either the TTL voltage level domain or the lower voltage level of the CMOS family, which enables it to be incorporated into a wide range of applications.The SN74HCT374 looks very similar to the SN74HC374, but the two devices have very different operations. While both are octal D-types, the SN74HCT374 is a D-type latch, while the SN74HC374 is a D-type flip-flop. The most fundamental difference between a latch and a flip-flop is that a latch is an edge-triggered device, meaning that the inputs must be changed on a clock edge. A flip-flop, however, is a level-triggered device, meaning that the inputs must remain at a certain level for a certain length of time for them to be activated. The SN74HCT374DWRG4 applications include:• Buffers and drivers, used to increase the speed and reliability of microprocessor and other digital systems by driving data bus and address signals with wide fan-out capability • Data storage, used to store binary data, such as counter and shift register states • Register files, used to provide quick access to large amounts of data stored in memory • Logic functions, used to implement Boolean logic functions such as AND, OR, XOR, and NOT • Multi-bit counters, used to count the number of pulses of a given frequency The working principle behind the SN74HCT374DWRG4 is the same as the SN74HC374, the following description is only applies to the HCT type device. The SN74HCT374 is an edge-triggered device, meaning that the inputs must be changed on a clock edge for the device to register a change. The direction of the clock edge used to trigger the device is determined by the clock mode desired. There are two clock modes available with the SN74HCT374: rising-edge triggered, with CLK going from low to high, and falling-edge triggered, with CLK going from high to low. When the clock edge is detected, the device registers the new data states at the four input pins, D0-D3. The data is then held steady from that point on.The SN74HCT374 also has two reset inputs, RESET and CLEAR, that can be used for system reset or asynchronous reset. In addition, the device includes two output-enable (OE) inputs that can be used to disable the outputs of the device when necessary. By using the OE inputs in conjunction with the clock mode, the device can be used to create timed pulses with a minimum of external components. The SN74HCT374DWRG4\'s eight flip flop circuits are all independent, and can be used in a variety of ways. They can be combined together to form more complex logic functions, or they can be used singly to provide quick data recall. The output of each flip flop can be fed back into itself to form a counter, or they can be used to control other devices. The possibilities are virtually limitless, and the SN74HCT374DWRG4 is an invaluable tool in any logic designer\'s arsenal.

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