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Page 1 Digital Logic Families 1 Page 2 Digital Logic Families 1 Overview Integration, Moore’s law Early families (DL, RTL) TTL Evolution of TTL family ECL CMOS family and its evolution Overview 2 Page 3 Digital Logic Families 1 Overview Integration, Moore’s law Early families (DL, RTL) TTL Evolution of TTL family ECL CMOS family and its evolution Overview 2 Integration Levels Gate/transistor ratio is roughly 1/10 – SSI < 12 gates/chip – MSI < 100 gates/chip – LSI …1K gates/chip – VLSI …10K gates/chip – ULSI …100K gates/chip – GSI …1Meg gates/chip 3 Page 4 Digital Logic Families 1 Overview Integration, Moore’s law Early families (DL, RTL) TTL Evolution of TTL family ECL CMOS family and its evolution Overview 2 Integration Levels Gate/transistor ratio is roughly 1/10 – SSI < 12 gates/chip – MSI < 100 gates/chip – LSI …1K gates/chip – VLSI …10K gates/chip – ULSI …100K gates/chip – GSI …1Meg gates/chip 3 Moore’s law A prediction made by Moore (a co-founder of Intel) in 1965: “… a number of transistors to double every 2 years.” 4 Page 5 Digital Logic Families 1 Overview Integration, Moore’s law Early families (DL, RTL) TTL Evolution of TTL family ECL CMOS family and its evolution Overview 2 Integration Levels Gate/transistor ratio is roughly 1/10 – SSI < 12 gates/chip – MSI < 100 gates/chip – LSI …1K gates/chip – VLSI …10K gates/chip – ULSI …100K gates/chip – GSI …1Meg gates/chip 3 Moore’s law A prediction made by Moore (a co-founder of Intel) in 1965: “… a number of transistors to double every 2 years.” 4 In the beginning… Diode Logic (DL) simplest; does not scale NOT not possible (need an active element) = = Resistor-Transistor Logic (RTL) replace diode switch with a transistor switch can be cascaded large power draw 5Read More
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88 videos|71 docs|58 tests
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