In TTL logic unused input is considered as___

 Identify the device 74HC153 

An n-bit parallel adder consists of

Which one is necessary to prevent dc return between the source and load

In CMOS logic, the number of inputs that can be connected to a specified output is called

A sequence 1011 (rightmost bit first) is applied to a Ring counter. What is the sequence observed in the 35th clock cycle?

A 4-bit binary up counter has an input clock frequency of 20 kHz. The frequency of the most significant bit (MSB) is:

A 2-bit binary multiplier can be implemented using

Which digital circuits are easier to design?

Which of the following is false about asynchronous counters?