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8. IC DETAIL
8.1
OUTLINE
This section describes functions of TTL, ECl, linear IC's and Fujitsu Analog Master Slice
IC's.
8.2
LOGIC CONVENTION AND SYMBOLOGY
8.2.1
TTL logic
M2301/M2302 micro disk drives use +5V transistor - transistor - logic. TTL logic
is defined in terms of standard POSITIVE lOG IC using the following definitions:
High Voltage
=
logical "1"
Low Voltage
=
Logical "0"
The input/output logic levels of TTL are defined as follows:
(1) TTL Medium/High Speed IC
Max. +5.5V
+2.0V
Fig.8.1 TTL Medium/High Speed
Ie
Level
B03P-4605-0003A .... A
+5.25V
+2.4V
+O.4V
OV
8·'
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