SN74ALS874BDW

Max Propagation Delay @ V, Max CL:	14ns @ 5V, 50pF
Base Part Number:	74ALS874
Package / Case:	24-SOIC (0.295", 7.50mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Current - Quiescent (Iq):	21mA
Voltage - Supply:	4.5 V ~ 5.5 V
Current - Output High, Low:	2.6mA, 24mA
Trigger Type:	Positive Edge
Series:	74ALS
Clock Frequency:	30MHz
Number of Bits per Element:	4
Number of Elements:	2
Output Type:	Tri-State, Non-Inverted
Type:	D-Type
Function:	Master Reset
Part Status:	Active
Packaging:	Tube

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.Introduction

The SN74ALS874BDW is a high-speed 8-bit synchronous static shift register and is one of the many products of Texas Instruments involving logic and flip flops. In this article, the application field and working principle of the SN74ALS874BDW will be discussed.

Application Field

The SN74ALS874BDW is mainly used for applications requiring a shift register with high speed and low drive capability. It is also suitable for applications requiring a relatively high level of integration and high-speed operation. It is widely used in applications such as serial data transmission between devices, synchronous data transfer and data storage. These applications are widely used in the fields of embedded system control, communications, consumer electronics, automation, and others.

Working Principle

The SN74ALS874BDW is a synchronous static shift register, meaning that data is shifted by a clock signal and held in the register. It works according to the principle of four-phase non-overlapping clock signals (S0,S1,S2,S3). When S0 and S1 are low, data isloaded. When S2 is low, the data stored in the register is shifted one bit to the right each time a clock signal is provided. When S3 is low, the data stored in the register is shifted one bit to the left. This shift register also has an asynchronous reset input, allowing the data stored in the register to be reset to zero at any time. Furthermore, the SN74ALS874BDW has an enable/disable function that can be used to control the data shifting operation.

Conclusion

To summarize, the SN74ALS874BDW is a high-speed 8-bit synchronous static shift register mainly used for applications requiring a shift register with high speed and low drive capability. This shift register operates according to the principle of four-phase non-overlapping clock signals, and has an asynchronous reset input and enable/disable function for additional control of the shifting operation. It is widely used in embedded system control, communications, consumer electronics, automation, and other applications.

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