SN74HC174DG4

Max Propagation Delay @ V, Max CL:	27ns @ 6V, 50pF
Base Part Number:	74HC174
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Input Capacitance:	3pF
Current - Quiescent (Iq):	8µA
Voltage - Supply:	2 V ~ 6 V
Current - Output High, Low:	5.2mA, 5.2mA
Trigger Type:	Positive Edge
Series:	74HC
Clock Frequency:	50MHz
Number of Bits per Element:	6
Number of Elements:	1
Output Type:	Non-Inverted
Type:	D-Type
Function:	Master Reset
Part Status:	Active
Packaging:	Tube

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Introduction

The SN74HC174DG4 is a 4-bit edge-triggered flip-flop integrated circuit (IC) manufactured byTexas Instruments. This IC is part of the 74HC00 series of logic integrated circuits (ICs). It is often used when a device needs to store multiple bits of data or synchronize the timing of digital signals.

Application Field

The SN74HC174DG4 is particularly useful for digital applications such as microcontroller-based projects. It is used for synchronizing digital signals, and for data storage. For example, it can be used to simply store and recall digital values for digital logic purposes.It is also used for applications that require multiple bits of data, such as digital counters and registers. The flip-flops in the SN74HC174DG4 are separately addressable, meaning they can be programmed independently of each other, allowing for more flexible data manipulation.

Working Principle

The SN74HC174DG4 works by using four edge-triggered flip-flops, each with a set/reset (SR) latch connected to its input. When the clock edge is detected, the output of each individual flip-flop is updated according to the input data.The SR latches control the set and reset inputs of the flip-flops. When the SR latch input is logic high, then an S (set) signal is passed to the respective flip-flop, causing the output of that flip-flop to go logic high. When the SR latch input is logic low, then the R (reset) signal is passed to the corresponding flip-flop, causing the output of that flip-flop to go logic low.The SN74HC174DG4 also has an asynchronous clear feature. When the Clear (Clr) input is asserted, the output of all four flip-flops is logic 0, regardless of their input data state.

Conclusion

The SN74HC174DG4 is a 4-bit edge-triggered flip-flop IC that is ideal for digital applications such as synchronizing digital signals and storing multiple bits of data. Its SR latches and asynchronous clear feature make it easy to use and program.

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