How many 16K * 4 RAMs are required to achieve a memory with a capacity of 64K and a word length of 8 bits?

A programmable logic array (PLA) is a programmable device that can implement combinational logic circuits. PLAs have a set of programmable AND gates that link to a set of programmable OR gates. The OR gates can be conditionally complemented to produce an output.  PLAs are read-only memory (ROM) with programmable addresses. They can be used to realize logic functions without designing logic networks and transistor circuits. PLAs are compact and space-efficient, and can be realized in NMOS technology.  Typical combinational PLAs have 10 to 20 inputs and 2 to 10 outputs, with 2 to 8 AND gates... Show more

A programmable logic array (PLA) is a programmable device that can implement combinational logic circuits. PLAs have a set of programmable AND gates that link to a set of programmable OR gates. The OR gates can be conditionally complemented to produce an output. 

PLAs are read-only memory (ROM) with programmable addresses. They can be used to realize logic functions without designing logic networks and transistor circuits. PLAs are compact and space-efficient, and can be realized in NMOS technology. 
Typical combinational PLAs have 10 to 20 inputs and 2 to 10 outputs, with 2 to 8 AND gates driving each OR gate. PLAs can be linked together with more gates or logic circuits. 
 

Related Test: Digital Electronics Practice Test: Memory Devices

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