Logic Symbology - Fujitsu M2301B Manual

8.2.2 Eel logic
The unit uses ECl (Emitter-Coupled-logic). The Eel logic is defined as POSITIVE
LOGIC used for the diffinition as follows.
High Voltage
=
logical"l"
Low Voltage
=
logical "0"
The input/output logic levels of ECl
~re
defined as follows.
-0.81 V --r--r-~,.---:r--:
"1"
-1.475~-.:-~-.:--.:--o:--
"0"
-1 .85V ............................ .:..-....
Input
~-O.81V
~-0.98V
-1.63V
-1.85V
Output
Fig.8.4 Eel logic level
8.2.3 logic Symbology
The following conventions are provided to aid in understanding the symbology used
in this manual.
(1) TTL
: ----II
)I---Y
A
I>-y
B
o
B03P·4605-0003A .... B
The diagram shows AND gate.
Y =A' B
The diagram shows OR gate.
Y=A+B
A circle placed on any input line or
on the output line indicates that logical
"0" is the significant state.
The absence of a circle indicates logical
"1" is the significant state.
8-3