DM74LS85N

Series:	74LS
Packaging:	Tube
Part Status:	Obsolete
Type:	Magnitude Comparator
Number of Bits:	4
Output:	Active High
Output Function:	A<B, A=B, A>B
Voltage - Supply:	4.75 V ~ 5.25 V
Current - Output High, Low:	400µA, 8mA
Max Propagation Delay @ V, Max CL:	42ns @ 5V, 50pF
Operating Temperature:	0°C ~ 70°C
Package / Case:	16-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Base Part Number:	74LS85

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Logic comparators are electronic circuits that perform comparisons of two binary values or a sequence of them and produce a single output. The DM74LS85N is an 4-bit parallel comparator with open-collector outputs which provides 4-input comparison of two 4-bit words. It takes two 4-bit words A and B and produces a single active low logic output representing equality or inequality of the two words.The DM74LS85N can be used in a variety of applications such as in digital signal processing such as digital signal filters and DAC systems, in digital computer arithmetic such as constant multiplication, digital signal modulation, digital audio and video production, digital image manipulation and image processing. Furthermore, it is used in cognitive computing, neural networks and as a digital comparator for microcontrollers.The DM74LS85N is composed of 4 independent comparison circuits with open-collector type outputs. Each comparator module takes four single-ended binary bits and provides one active low logic output representing the equality or inequality of the two words A and B. It has an operating voltage of 4.5V to 5.5V and a maximum operating temperature of 75°C. The architecture of the DM74LS85N is simple which makes it easy to use.The DM74LS85N is a positive-edge triggered device with a propagation delay of 18ns and a typical power dissipation of 1mA at 5V. It has a low-power CMOS process, uses a single power supply source, and has open-collector outputs. The open collector type output is usually used when the input logic circuitry requires an output that requires a pull-up resistor to achieve logic 1 output. The working principle of the DM74LS85N is based on the principle of inequality comparison. When the 4-bit words A and B are applied to the comparator, the comparator starts comparing the two words bit-by-bit. If the words are equal, the output of the comparator is low and if the words are unequal, the output of the comparator is active high.The DM74LS85N is a versatile and useful IC that can be used in a variety of applications. It is a reliable and powerful device that can perform binary comparison efficiently. The DM74LS85N can be used in applications such as digital signal processing, digital computer arithmetic and digital signal modulation etc. It performs efficiently in both static and dynamic applications, making it an ideal choice for various applications.

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