M74HC251TTR

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1. What is M74HC251TTR?
   M74HC251TTR is a 8-channel 1 of 8 line decoder/multiplexer logic IC, produced by the semiconductor company NXP. It is available in 16-Pin DIP, SOIC and MSOP package. This IC is designed for use in High-Speed industrial, consumer, automotive and commercial applications which are applicable to CMOS and TTL technologies.
2. Application field of M74HC251TTR
   M74HC251TTR is suitable for high speed, low power operations. It is widely used in logic signals, multiplexers, decoders, switches and relays, etc.It finds extensive applications in serial-data systems to program multiple systems through a set of data lines in conjunction with an address line. Also, in PLC (programmable logic controllers), it is used as a 8-channel input or output card with just one pin.Its high speed and low power operations make it suitable for use in remotely operated devices, automatic control systems, communication systems and security systems. Not only that, it is also used in various digital products like digital clocks, digital thermometers and telephones.Other applications of M74HC251TTR includes multifunctional keyboards, display units, remote keyless entry, power management systems, consumer electronics, automotive applications, professional instruments and robots.
3. Working principle of M74HC251TTR
   M74HC251TTR is a high speed CMOS 1-of-8 line decoder/ multiplexer. It has eight inputs labeled I0 to I7 and three control signals labelled A,B and C. The inputs can be connected to any logic constantly or can be directly operated from the external circuit.This device usually responds to the input signals and produces an output in form of a BCD code. According to the BCD code, each of the eight possible combinations of the A,B and C control lines will result in one output being "high".All the other outputs from the M74HC251TTR will be "low". This logic device also has two different power supply options, it can be powered by either a +5 V or a +3.3 V supply. If the device is powered by a +3.3 V supply, then the output to its output pins will be compatible with a +5 V CMOS.
4. Conclusion
   M74HC251TTR is a versatile 8-channel 1 of 8 line decoder/multiplexer logic IC, used mainly in logic signals, multiplexers, decoders, switches and relays. It works on high speed operations and requires low power which makes it suitable for remotely operated devices, automatic control systems, communication systems and other digital products. It is available in 16-Pin DIP, SOIC and MSOP package.

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