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Describe 74LS139 memory decoder.
The 74LS139 is a dual 2-to-4 line decoder. This contains two separate 2-to-4 line decoders - all with its address, output and enable connections.
The Pin-out of the 74LS139
Give the properties of PVC. PVC- It is acquired from polymerisation of hydrogen chloride and acetylene in the presence of a catalyst as peroxides at about 50 0 C. Properties
Faraday conducted a series of experiments on coils in a magnetic field. He found that if the magnetic flux density threading a coil were changed, a voltage was induced in the co
Register to Register This instruction is used to copy data from the source register to the destitution register. The previous contents on the destination register wil
how did shockley derived his equation
1. For the flyback converter operating in the discontinuous "current" (flux) mode, derive an expression for the time at which the magnetizing current returns to zero. 2. A forwa
The Ward-Leonard system, which is used in the control of large dc motors employed in rolling mills, is a highly flexible arrangement for effecting position and speed control of a s
Q. Consider a series-carry synchronous counter with T flip-flops shown in Figure in which the AND gates carry forward the transitions of the flip-flops, thereby improving the speed
What are the features used mode 1 in 8255? Two groups - group A and group B are available for stored data transfer. 1. Each group have one 8-bit data I/O port and one 4-bit
Q. What do you mean by addressing and numbering? Numbering and Addressing: In data and telephone networks, end equipment are more often single units than multiple devices uni
Conditional Jumps The most important part of programming is its decision making capability. Which is normally provided by statements like if then else in high level
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