
21Introduction
TABLE 1.9
Different Devices from Silicon and Circuit Complexity over the Decades
Year 1947 1950 1961 1966 1971 1980 1990 2000
Technology Transistor
invention
Discrete
devices
SSI MSI LSI VLSI ULSI GSI
Approximate
number of
transistors
per chip
1 1 10 100 to 1,000
(1 K)
1,000 to 20
K
20 K to
1,000 K
1,000 K to
10,000 K
More than
10,000 K
Typical
devices
Point
contact
diode
Junction
transis-
tors,
diodes
Planar
devices,
logic
gates,
ip-ops
Counters,
multiplex-
ers, adders
8-bit ROM
RAM
16-, 32-bit
micropro-
cessors
Special
proces-
sors
Many
more
complex
circuits
Sources: Data from Wikipedia, the free encyclopedia; T. F. Shao and F. C. Wang, “Wafer fab ...