DM74AS161M

Timing:	Synchronous
Base Part Number:	74AS161
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C
Voltage - Supply:	4.5V ~ 5.5V
Trigger Type:	Positive Edge
Count Rate:	75MHz
Series:	74AS
Reset:	Asynchronous
Number of Bits per Element:	4
Number of Elements:	1
Direction:	Up
Logic Type:	Binary Counter
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The DM74AS161M is a multiplexer (or selector) integrated circuit designed and produced by Fairchild Semiconductor Corporation. It can be used to select one-of-eight inputs and output the corresponding data in four-bit form or as a single vector. It is one of the most common multiplexer circuit in the market, characterized by its high operating frequency, low power consumption and low temperature coefficient, making it a popular choice for applications in industrial, automotive, medical and consumer electronics.

Application Field and Working Principle

The DM74AS161M can be used in wide range of applications, such as logic buffer, data distribution and logic shifting. As logic buffer, it can be used to amplify logic signals and reduce electrical noise, enabling reliable data transmission between different logic elements of a system. As data distribution, the multiplexer can be used to distribute data from one source to multiple destination circuits, with data selection controlled by a multiplexer selection. As logic shifting, the DM74AS161M can be used to shift data between registers, enabling in-system data manipulation and modification.In terms of its working principle, the DM74AS161M functions as a four-bit linear counter. An up/down input and a clock input are used to regulated the counting sequence. Depending on the value of the up/down input, the counter will either count up or down on each clock edge. The output of the counter is connected to a multiplexer, thereby allowing different combinations of signals to be selected and output. This switching function is controlled by the multiplexer selection input.

Features and Benefits

The DM74AS161M has several distinct features and benefits that make it an ideal solution for many applications. It operates at a high speed of up to 500MHz, has a low power consumption of only 2nA, and requires very little drive strength of 74V. This ensures that the circuit will operate reliably in a wide range of electric and environmental conditions. Further, the integrated circuit has a low temperature coefficient (TC) of 0.1%, making it particularly suitable for high accuracy measurement applications.In addition, the DM74AS161M features automatic reset gate which ensures that the output data is cleared at power off. This prevents any undesirable output or power line noise from affecting the operation of the multiplexer. Furthermore, the multiplexer is packaged with a 24-pin DIP open-drain output, making it easy to assemble and integrate with other circuits.

Conclusion

The DM74AS161M is a versatile and highly reliable multiplexer integrated circuit designed and built by Fairchild Semiconductor. It can be used to select one-of-eight inputs and output the corresponding data in four-bit form or as a single vector. The multiplexer operates at a high speed of up to 500MHz, with low power consumption and low temperature coefficient, making it suitable for applications in many different sectors. The features and benefits offered by the integrated circuit ensure that the DM74AS161M is an excellent choice for many logic and data manipulation applications.

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