types of asic & package types
TRANSCRIPT
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8/9/2019 Types of ASIC & Package Types
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ASICS
APPLICATION SPECIFIC INTEGRATED CIRCUITS)
- are non-standard integrated circuits that are designed for a
specific use or application.
- The cost of designing an ASIC is very high and therefore they tend
to be reserved for high volume products. But it can be very cost
effective for many applications where they are produced in large
scale.
TYPES OF ASICS
1. Full-Custom ASICs
- the complete IC design and developments are customized
by the designer. Full-custom offers the highest performance
and lowest part cost.
- the advantages of full-custom design are reduced area
better performance increased reliability.
- the disadvantages increased design time complexity
increased non-recurring engineering costs design expense
requirement of much higher skilled design team and highest
risk.
Examples: mobile processor sensor ICs actuator ICs etc.
TYPES OF ASICS
2
. Standard-Cell-Based ASICs
- ASIC manufacturer creates functional blocks with known
electrical characteristics such as propagation delay
capacitance and inductance. Utilizing these functional
blocks standard cell of very high gate density and good
electrical performance is designed.
- high degree of flexibility provided that standard functions
are able to meet the requirements.
- the significant advantage is that this uses the
m nuf turers cell libraries that have been used in
potentially hundreds of other design implementations.
- Standard cells produce a design density that is cost
effective manufacturing time is also less and they can also
integrate IP cores and SRAM effectively.
TYPES OF ASICS
3. Gate-Array-Based ASICs
- is the least customizable.
-Is ideal where a large number of standard functions
are required which can be connected in a particular
manner to meet the given requirement.
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SUMMARY OF COMPARISON DESIGN FLOW
- is a sequence of steps to design an ASIC.
ADVANTAGES OF ASICS
1. Small in Size
2. No Routing Issues
3. No Timing Issues
4. Less Power Consumption
5. Consistence and Reliable
6. Fully Developed and Functional
DRAWBACKS OF ASICS
1. Not Flexible
2. Higher System Cost
3. Increased Time to Market
ASSIGNMENT:
Explain the advantages and drawbacks of ASICs. Cite
examples or proofs if needed.
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PACKAGES
Package Functions
electrical connection of signals and power from chip to board
little delay or distortion
mechanical connection of chip to board
removes heat produced on chipprotects chip from mechanical damage
compatible with thermal expansion
inexpensive to manufacture and test
PACKAGE TYPES
Through-hole vs. Surface Mount
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