MB88155 Fujitsu Media Devices, MB88155 Datasheet - Page 7

• Manufacturer Part Number: MB88155
• Description: Spread Spectrum Clock Generator
• Manufacturer: Fujitsu Media Devices

Preventing Latchup
Handling unused pins
The attention when the external clock is used
Power supply pins
Oscillation circuit
HANDLING DEVICES
A latchup can occur if, on this device, (a) a voltage higher than V
input or output pin or (b) a voltage higher than the rating is applied between V
significantly increases the power supply current and may cause thermal destruction of an element. When you
use this device, be very careful not to exceed the maximum rating.
Do not leave an unused input pin open, since it may cause a malfunction. Handle by, using a pull-up or pull-
down resistor.
Unused output pin should be opened.
Input the clock to XIN pin, and XOUT pin should be opened when you use the external clock.
Please pay attention so that an overshoot and an undershoot do not occur to an input clock of XIN pin.
Please design connecting the power supply pin of this device by as low impedance as possible from the current
supply source.
We recommend connecting electrolytic capacitor (about 10 µF) and the ceramic capacitor (about 0.01 µF) in
parallel between V
Noise near the XIN and XOUT pins may cause the device to malfunction. Design printed circuit boards so that
electric wiring of XIN or XOUT pin and the resonator do not intersect other wiring.
Design the printed circuit board that surrounds the XIN and XOUT pins with ground.
SS
and V
DD
near the device, as a bypass capacitor.
DD
or a voltage lower than V
DD
and V
SS
. The latchup, if it occurs,
MB88155
SS
is applied to an
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