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CHAPTER 1: INTRODUCTION TO ASIC AND STANDARD IC
SECTION 1.1: INTRODUCTION
An ASIC is an application-specific integrated circuit. Some digital logic ICs and their analog counterparts are standard parts, or standard ICs .They are readily available in market. One can select standard ICs from catalogs and data books and buy them from market. Different microelectronic systems are designed using the standard ICs.
With the advent of VLSI in the 1980s engineers began to realize the advantages of designing an IC that was customized to a particular application rather than using standard ICs alone.
With the help of VLSI it is possible to build a system from a smaller number of components by combining many standard ICs into a few custom ICs.
There are many situations in which it is not appropriate to use custom IC for each and every part of a microelectronic system. If a large amount of memory is needed, it is still best to use standard memory ICs, either dynamic random-access memory (DRAM) or static ram
(SRAM) in conjunction with custom ICs. Examples of ICs that are not ASICs include standard parts such as: memory chips sold as a commodity item-ROMs, DRAM, SRAM, microprocessors; TTL or TTL equivalent ICs at SSI, MSI and LSI levels.
Examples of ICs that are not ASICs include standard parts such as: a chip for a toy for children like a talking doll, a chip for mobile phone, chip containing a microprocessor as a cell together with other logic.
For example, two ICs that might or might not be considered ASICs are a controller chip for a
PC and a chip for modem. Both these examples are specific to an application (shades of
ASIC) but are sold to many different system vendors (shades of a standard part).thus it is difficult to decide whether an IC is ASIC or not because every IC has an application.
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CHAPTER 2: VLSI DESIGN FLOW
The chip design includes different types of processing steps to finish the entire flow. For anyone, who just started his
CHAPTER 1: INTRODUCTION TO ASIC AND STANDARD IC
SECTION 1.1: INTRODUCTION
An ASIC is an application-specific integrated circuit. Some digital logic ICs and their analog counterparts are standard parts, or standard ICs .They are readily available in market. One can select standard ICs from catalogs and data books and buy them from market. Different microelectronic systems are designed using the standard ICs.
With the advent of VLSI in the 1980s engineers began to realize the advantages of designing an IC that was customized to a particular application rather than using standard ICs alone.
With the help of VLSI it is possible to build a system from a smaller number of components by combining many standard ICs into a few custom ICs.
There are many situations in which it is not appropriate to use custom IC for each and every part of a microelectronic system. If a large amount of memory is needed, it is still best to use standard memory ICs, either dynamic random-access memory (DRAM) or static ram
(SRAM) in conjunction with custom ICs. Examples of ICs that are not ASICs include standard parts such as: memory chips sold as a commodity item-ROMs, DRAM, SRAM, microprocessors; TTL or TTL equivalent ICs at SSI, MSI and LSI levels.
Examples of ICs that are not ASICs include standard parts such as: a chip for a toy for children like a talking doll, a chip for mobile phone, chip containing a microprocessor as a cell together with other logic.
For example, two ICs that might or might not be considered ASICs are a controller chip for a
PC and a chip for modem. Both these examples are specific to an application (shades of
ASIC) but are sold to many different system vendors (shades of a standard part).thus it is difficult to decide whether an IC is ASIC or not because every IC has an application.
2
CHAPTER 2: VLSI DESIGN FLOW
The chip design includes different types of processing steps to finish the entire flow. For anyone, who just started his