SN74AS253ADR

Series:	74AS
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Multiplexer
Circuit:	2 x 4:1
Independent Circuits:	1
Current - Output High, Low:	2.6mA, 24mA
Voltage Supply Source:	Single Supply
Voltage - Supply:	4.5 V ~ 5.5 V
Operating Temperature:	0°C ~ 70°C
Mounting Type:	Surface Mount
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	16-SOIC
Base Part Number:	74AS253

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The SN74AS253ADR is a device belonging to the family of logic signal switches. These devices enable users to multiplex and decode input information and share it to other systems.Multiplexers, decoders, and signal switches are used to connect communication devices and create a series of signals for electrical systems. These devices are used for both digital and analog signals within a circuit board. The SN74AS253ADR is a particular signal switch incorporating asynchronous operation. Instead of multiplexing a single input in either positive or negative logic, it can be operated in both logic state at one time. The device features a triple 2-input multiplexer, with independent select and enable buffers.The SN74AS253ADR is commonly used in application fields such as data handling, memory decoder, and switches for peripheral devices. These applications are widespread across different industries including the automotive, biomedical, industrial, and aerospace industries.In order to understand its working principle, it is necessary to understand the different components of the SN74AS253ADR. This device contains three data channels, a two-input multiplexer for each channel, and an enable buffer. The input signals of the multiplexer can be characterized as being logic level independent; that is, they can be positive or negative logic, or a combination of the two. The body of the switch contains a set of logic gates and selectors, each of which serves a dedicated purpose.The output of the device is communicated through the enable buffer, which is connected directly to the input of the final output. The selectors of the device are responsible for the proper output selection. Whenever a signal to the enable channel is received, it is converted into either a positive or negative logic signal, depending on the control inputs. This signal is then passed on to the multiplexer’s inputs, which in turn send it out through the output.In order to understand how these signals are converted into the desired output, it is important to understand the different states of the multiplexer. For example, when the select inputs are both set to 0, the output of the multiplexer is 0, indicating that both data inputs are inactive. Conversely, when the select inputs are both set to 1, the output is 1, indicating that both data inputs are active.The SN74AS253ADR signal switch is a versatile device that allows users to input information and share it with other systems. It is used for both digital and analog signal switching, with the added advantage of operating in both positive and negative logic simultaneously. The device is widely used in industries such as aerospace and industrial, among others.

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