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14 Cards in this Set

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  • Back
there are basically 3 stages of internal circuitry in a TTL (transistor transistor logic) IC:
1.)input
2.)control
3.)ouput
the input current (Iil or Iih) to an IC gate is _______ value specified by the IC manufacturer
constant
the output current of an IC gate depends on the _____ of the load connected to it. Its value cannot exceed the ______ rating of the chip, Iol or Ioh
size; maximum
the high and low level output voltages of the standard TTL family are not 5 or 0v but typically are ____ and _____v
3.4; 0.2
the ________ _______ is the length of time that it takes for the output of a gate to respond to a stimulus at its input
propagation delay
the rise and fall times of a pulse describe how long it takes for the ______ to travel between its 10% and 90% levels
voltage
_____ _____ outputs are required whenever logic outputs are connected to a common point
open collector
several improved ____ families are available and continue to be introduced each year, providing decreased ______ consumption and decreased ______ ______
TTL; power; propagation delay
the _______ family uses complementary metal oxide semiconductor transistors instead of bipolar transistors used in TTL ICs
CMOS
traditionally, the ______ family consumed less power but was slower than TTL. However, recent advances in both technologies have narrowed the differences
CMOS
The ________ family combines the best characteristics of bipolar technology and CMOS technology to provide logic functions that are optimized for the high speed, low power characteristics required in microprocessor systems
BiCMOS
_____ ______ logic provides the highest speed ICs. Its drawback is its very high _____ _______
emitter-coupled logic; power consumption
a figure of merit of IC families is the product of their propagation delay and power consumption, called the ______ ____ _____ (the lower the better)
speed-power product
when interfacing logic families, several considerations must be made. The output voltage level of one family must be ____ _____ enough to meet the input requirements of the receiving family. Also, the output current capability of the _____ ______ must be high enough for the input draw of the receiving gate or gates.
high and low; driving gate