Hardware manual

46
FUJITSU SEMICONDUCTOR CONFIDENTIAL
MB96630 Series
DS704-00012-1v0-E
(7) Power-on Reset Timing
(V
CC
= AV
CC
= 2.7V to 5.5V, V
SS
= AV
SS
= 0V, T
A
= - 40°C to + 125°C)
Parameter Symbol Pin name
Value
Unit
Min Typ Max
Power on rise time
t
R
Vcc
0.05
-
30
ms
Power off time t
OFF
Vcc 1 - - ms
If the power supply is changed too rapidly, a power-on reset may occur.
We recommend a smooth startup by restraining voltages when changing
the power supply voltage during operation, as shown in the figure below.
0.2V
2.7V
t
R
t
OFF
0.2V 0.2V
It is required that rises in voltage
have a slope of 50 mV/ms or less.
2.7V
5.0V
0V
V
CC
V
CC
V
SS