Note:

The logic negation symbol (0) a1 one gives no information about the actual voltage levels used in a digital cirucit. For this reason the type of logic system (positive or negative) must be specified. In this manual, unless otherwise noted on the schematic, the logic system is positive; that is, the more positive voltage level is the HIGH or l-state and the less positive level is the LOW or O-state.

Function Labels

 

 

c

Adder

 

D

Amplifier/Buffer

1 4

Monostable Multivibrator (One-Shot)

&

And Gate

21

Or Gate

 

=l

Exclusive or Gate

X-Y

Encoder,

Decoder

XMAX+Y

Priority

Encoder

greek symbol

Schmitt

Trigger

ALU

Arithmetic and Logic Unit

C T R

Counter

 

DEMUX

Demultiplexer

FF

Flip-Flop

MUX

Multiplexer

RAM

Random

Access Memory

REG

Register

 

ROM

Read Only Memory

SAR

Successive Approximation Register

SR

Shift Register

Figure 6. Schematic Symbols for Digital Integrated Circuits (3 of 7)

General Information 15