The Signetics 2650 - The MESSUI Place
The Signetics 2650 - The MESSUI Place
The Signetics 2650 - The MESSUI Place
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INFORMATION CENTRE<br />
Notes & Errata<br />
2708 PROM PROGRAMMER (February<br />
1979, File No. 2/CC/35): In the overlay<br />
diagram on page 89, the 0.01uF and<br />
0.0047uF capacitors connected to pins<br />
14 and 15 of the 7415138s should be exchanged.<br />
<strong>The</strong> circuit diagram is correct.<br />
To prevent spurious triggering of the<br />
monostable chain, we have found it adviseable<br />
to ground the clear line (pins 3<br />
and 11) of "the 7415138s during reads<br />
from the PROM. This is best achieved<br />
by using a three pole instead of a two<br />
pole switch for the read/program<br />
switch.<br />
ELECTRONICS Australia, March, 1979 125
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