Epson S1C33 Specifications Page 94

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7 Mounting
88
EPSON
S1C33 ASIC DESIGN GUIDE
EMBEDDED ARRAY S1X50000 SERIES
Arrangement of Signal Lines
In order to prevent generation of electromagnetic induction noise caused by mutual
inductance, do not arrange a large current signal line near the circuits that are sensi-
tive to noise such as the oscillation unit and analog input unit.
When a signal line is parallel with a high-speed line in long distance or intersects a
high-speed line, noise may generated by mutual interference between the signals and
it may cause a malfunction.
Do not arrange a high-speed signal line especially near circuits that are sensitive to
noise such as the oscillation unit and analog input unit.
Figure 7.3 Prohibited Pattern
Precautions for Visible Radiation (when bare chip is mounted)
Visible radiation causes semiconductor devices to change the electrical characteris-
tics. It may cause this IC to malfunction. When developing products which use this
IC, consider the following precautions to prevent malfunctions caused by visible radi-
ation.
(1) Design the product and implement the IC on the board so that it is shielded from vis-
ible radiation in actual use.
(2) The inspection process of the product needs an environment that shields the IC from
visible radiation.
(3) As well as the face of the IC, shield the back and side too.
K60 (AD0)
Large current signal line
High-speed signal line
OSC4
OSC3
V
SS
Large current signal line
High-speed signal line
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