Key code description, Gut-6000a user manual – GW Instek GUT-6000A User Manual
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GUT-6000A USER MANUAL
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KEY CODE DESCRIPTION
Input device number without series key code, it runs by switching TTL/CMOS
selection.
Ex1. IC TTL 74138
An user switches TTL/CMOS to ''TTL 74'', then input 1 , 3 , 8 in order.
Ex2. CMOS 4020
An user switches TTL/CMOS to ''CMOS40'', then input 2 , 0 in order.
Ex3. CMOS 74HC4040
An user switches TTL/CMOS to ''CMOS40'', then input 4 , 0 in order.
Some ICs have different pin arrangements despite that have the same number. In
that situation, various key codes information is supplemented for this group’s ICs (see
appendixes).
Users may come upon difficult in some generic type’s ICs. For example, an IC is
numbered TTL 7454 and 74H54, the user identifies the difference with ''XXX'' and
''9XXX''. If the user is interested in testing TTL 74H54 device, then selects ''TTL 74''
first. Then types 9 , 0 , 5 , 4 .