MB95F118MS datasheet(14/64 Pages) FUJITSU

14 / 64 page

MB95110M Series

■ HANDLING DEVICES

• Preventing Latch-up

Care must be taken to ensure that maximum voltage ratings are not exceeded when they are used.

Latch-up may occur on CMOS ICs if voltage higher than VCC or lower than VSS is applied to input and output pins

other than medium- and high-withstand voltage pins or if higher than the rating voltage is applied between VCC

pin and VSS pin.

When latch-up occurs, power supply current increases rapidly and might thermally damage elements.

Also, take care to prevent the analog power supply voltage (AVCC) and analog input voltage from exceeding the

digital power supply voltage (VCC) when the analog system power supply is turned on or off.

• Stable Supply Voltage

Supply voltage should be stabilized.

A sudden change in power-supply voltage may cause a malfunction even within the guaranteed operating range

of the Vcc power-supply voltage.

For stabilization, in principle, keep the variation in Vcc ripple (p-p value) in a commercial frequency range

(50/60 Hz) not to exceed 10% of the standard Vcc value and suppress the voltage variation so that the transient

variation rate does not exceed 0.1 V/ms during a momentary change such as when the power supply is switched.

• Precautions for Use of External Clock

Even 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.

MB95F118MS Scheda tecnica(PDF) 14 Page - fujitsu semiconductor