MB95710M Series
MB95770M Series
Document Number: 002-09307 Rev. *D
Page 31 of 172
(4) Radiation, Including Cosmic Radiation
Most devices are not designed for environments involving exposure to radiation or cosmic radiation. Users should
provide shielding as appropriate.
(5) Smoke, Flame
CAUTION: Plastic molded devices are flammable, and therefore should not be used near combustible substances.
If devices begin to smoke or burn, there is danger of the release of toxic gases.
Customers considering the use of Cypress products in other special environmental conditions should consult with
sales representatives.
9. Notes On Device Handling
• Preventing latch-ups
When using the device, ensure that the voltage applied does not exceed the maximum voltage rating.
In a CMOS IC, if a voltage higher than V
CC
or a voltage lower than V
SS
is applied to an input/output pin that is neither
a medium-withstand voltage pin nor a high-withstand voltage pin, or if a voltage out of the rating range of power sup-
ply voltage mentioned in “22.1 Absolute Maximum Ratings” of “Electrical Characteristics” is applied to the V
CC
pin or
the V
SS
pin, a latch-up may occur.
When a latch-up occurs, power supply current increases significantly, which may cause a component to be thermally
destroyed.
• Stabilizing supply voltage
Supply voltage must be stabilized.
A malfunction may occur when power supply voltage fluctuates rapidly even though the fluctuation is within the guar-
anteed operating range of the V
CC
power supply voltage.
As a rule of voltage stabilization, suppress voltage fluctuation so that the fluctuation in V
CC
ripple (p-p value) at the
commercial frequency (50 Hz/60 Hz) does not exceed 10% of the standard V
CC
value, and the transient fluctuation
rate does not exceed 0.1 V/ms at a momentary fluctuation such as switching the power supply.
• Notes on using the external clock
When an external clock is used, oscillation stabilization wait time is required for power-on reset, wake-up from sub-
clock mode or stop mode.
10. Pin Connection
• Treatment of unused pins
If an unused input pin is left unconnected, a component may be permanently damaged due to malfunctions or latch-
ups. Always pull up or pull down an unused input pin through a resistor of at least 2 k
Ω
. Set an unused input/output
pin to the output state and leave it unconnected, or set it to the input state and treat it the same as an unused input
pin. If there is an unused output pin, leave it unconnected.
• Power supply pins
To reduce unnecessary electro-magnetic emission, prevent malfunctions of strobe signals due to an increase in the
ground level, and conform to the total output current standard, always connect the V
CC
pin and the V
SS
pin to the
power supply and ground outside the device. In addition, connect the current supply source to the V
CC
pin and the
V
SS
pin with low impedance.
It is also advisable to connect a ceramic capacitor of approximately 1.0 µF as a bypass capacitor between the V
CC
pin and the V
SS
pin at a location close to this device.
