Chapter 9 Summary Digital Funda

Front 1

there are basically 3 stages of internal circuitry in a TTL (transistor transistor logic) IC:

Back 1

1.)input
2.)control
3.)ouput

Front 2

the input current (Iil or Iih) to an IC gate is _______ value specified by the IC manufacturer

Back 2

constant

Front 3

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

Back 3

size; maximum

Front 4

the high and low level output voltages of the standard TTL family are not 5 or 0v but typically are ____ and _____v

Back 4

3.4; 0.2

Front 5

the ________ _______ is the length of time that it takes for the output of a gate to respond to a stimulus at its input

Back 5

propagation delay

Front 6

the rise and fall times of a pulse describe how long it takes for the ______ to travel between its 10% and 90% levels

Back 6

voltage

Front 7

_____ _____ outputs are required whenever logic outputs are connected to a common point

Back 7

open collector

Front 8

several improved ____ families are available and continue to be introduced each year, providing decreased ______ consumption and decreased ______ ______

Back 8

TTL; power; propagation delay

Front 9

the _______ family uses complementary metal oxide semiconductor transistors instead of bipolar transistors used in TTL ICs

Back 9

CMOS

Front 10

traditionally, the ______ family consumed less power but was slower than TTL. However, recent advances in both technologies have narrowed the differences

Back 10

CMOS

Front 11

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

Back 11

BiCMOS

Front 12

_____ ______ logic provides the highest speed ICs. Its drawback is its very high _____ _______

Back 12

emitter-coupled logic; power consumption

Front 13

a figure of merit of IC families is the product of their propagation delay and power consumption, called the ______ ____ _____ (the lower the better)

Back 13

speed-power product

Front 14

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.

Back 14

high and low; driving gate