DM74S175N

Series:	74S
Packaging:	Tube
Part Status:	Obsolete
Function:	Master Reset
Type:	D-Type
Output Type:	Differential
Number of Elements:	1
Number of Bits per Element:	4
Clock Frequency:	65MHz
Trigger Type:	Positive Edge
Current - Output High, Low:	1mA, 20mA
Voltage - Supply:	4.75 V ~ 5.25 V
Operating Temperature:	0°C ~ 70°C (TA)
Mounting Type:	Through Hole
Package / Case:	16-DIP (0.300", 7.62mm)
Base Part Number:	74S175

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DM74S175N Logic - Flip Flop

DM74S175N (universally known as the Texas Instruments ‘S175) is a 4-bit static shift register from Texas Instruments which provides a powerful tool for the design engineer. This static register can be used for a variety of tasks within a digital logic system from data processing and memory storage to basic data manipulation. In this article, I will discuss the application fields and working principle of DM74S175N as a logic flip-flop.

Application Field

The DM74S175N may be used in a variety of applications. It is primarily used as an overall register with four individually addressable output pins. Because it supports static information (that is data which remain static in the register until changed), it can be used to store programmable data, or control the logic of a system. This component can be used within other components such as microcontrollers and FPGAs to provide basic logical control of systems, providing a powerful but flexible way for the engineer to design a functioning logical system.In addition to its use as a data and control register, DM74S175N can be used in memory applications by storing an arbitrary number of bits within the register and then shifting these values out. As the register supports only static information, any data which is stored in the register will remain there until manually cleared or overwritten with new data.

Working Principle

DM74S175N operates by accepting data serially and providing 4 outputs. The component receives four bits of data and stores them in the static registers, controlled by two clock inputs. The first two clock inputs, designated as the clear (C) and register (R) control the overall operation of the component.When a low pulse is received at the clear input, this will set all the outputs of the component to a logically low level, resetting the component. When a proper level high pulse is received at the register clock, this will update the shifting register with the most recent data sent to the component.The second two clock inputs, the serial input (S) and parallel output (Q) control the data sent to and received from the component respectively. A high level input to the serial input pin will shift the previous data up one bit and allow a new bit to enter the register from the serial input. On the other hand, a high level pulse sent to the parallel output pin will initiate the movement of all four bits of data from the register, with the initial bit being sent to the serial output, whilst the remaining three bits are sent to the parallel output pins.

Conclusion

DM74S175N is a versatile component which can be used in a variety of applications and scenarios within the field of digital logic. Its simple mechanism of operation and powerful versatility makes it an excellent choice for designing digital logic and data processing systems. With its static storage ability and powerful data manipulation tools, it provides a powerful and flexible digital logic tool that any engineer can use in the development of a digital logic system.

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