SN74S174NSRE4

Max Propagation Delay @ V, Max CL:	12ns @ 5V, 15pF
Base Part Number:	74S174
Package / Case:	16-SOIC (0.209", 5.30mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Current - Quiescent (Iq):	144mA
Voltage - Supply:	4.75 V ~ 5.25 V
Current - Output High, Low:	1mA, 20mA
Trigger Type:	Positive Edge
Series:	74S
Clock Frequency:	110MHz
Number of Bits per Element:	6
Number of Elements:	1
Output Type:	Non-Inverted
Type:	D-Type
Function:	Master Reset
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The SN74S174NSRE4 is a Flip-Flop logic device which is used in various types of applications to provide input and output states which can be modified and held without the need for additional data. This type of device is generally used in digital circuits or systems to maintain a given state until another input is introduced, allowing for easily modified data as needed.

Application Field

The SN74S174NSRE4 Flip-Flop logic device has a variety of potential applications. It can be used as a data sensing or storage device across multiple levels of logical circuitry, as well as a switching type of device for low level gate triggering and overall control. The versatility of this device allows it to be used in a wide range of systems and processes, from industrial automation to residential security systems. This device can be used for a variety of tasks in digital circuit systems, including branching and resetting of control signals, as well as controlling serial data forming, instruction sequencing, and overall functional flow. It is also used as an external level or as an addressable memory expansion in computer systems, as a separate privileged memory space which is used to facilitate the reading and writing of data.

Working Principle

The functioning of the SN74S174NSRE4 Flip-Flop logic device can be attributed to its two input signals and two output states. The two basic input signals are designated as S (Set) and R (Reset), both of which apply logic state change to the corresponding output states. When S is triggered, the output state of the device is set to a logic ‘1’, and when R is triggered, the output state of the device is set to a logic ‘0’. In order to hold the given state of the output, either of the two outputs must remain negated, i.e. a logic ‘0’. Therefore, any change in the state can only be accomplished with the introduction of a new signal of the opposite polarity. For instance, if the output is currently in the logic ‘1’ state, the introduction of a logic ‘0’ signal will cause it to reset back to the logic ‘0’ state.A major part of the versatility of the SN74S174NSRE4 Flip-Flop logic device lies in its enable input signal. This is a special signal which allows the device to be bypassed and prevent any input signals from affecting its output. By removing the enable input, the two default states of the logic device can be prevented, allowing multiple external signals to briefly interfere without affecting the output signals.

Conclusion

Overall, the SN74S174NSRE4 Flip-Flop logic device is an effective way of providing a combination of set and reset signals, used to maintain low-level memory in a variety of digital systems. Its ability to hold a predetermined state and easily be modified as well as bypassed makes it ideal for applications requiring a combination of memory and logical control.

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