ds1836cs-20t-r Maxim Integrated Products, Inc., ds1836cs-20t-r Datasheet - Page 2

• Manufacturer Part Number: ds1836cs-20t-r
• Description: Ds1836a, Ds1836b, Ds1836c, Ds1836d 3.3v/5v Micromanager
• Manufacturer: Maxim Integrated Products, Inc.

OPERATION
Power Monitor
The DS1836 provides the functions of detecting out-of-tolerance conditions on a 3.3V or 5V power
supply and warning a processor-based system of impending power failure. When V
tolerance the RST will be forced active. When V
about 350ms and then return to an inactive state until the next V
On power-up reset is kept active for approximately 350ms after the power supply input has reached the
selected tolerance. This allows the power supply and system power to stabilize before RST is released.
Power Switch (DS1836A & B)
The DS1836 switches the V
current from the V
to V
will be drawn from the supply with the highest voltage: either V
Power Switch (DS1836C & D)
The DS1836 switches the V
current from the V
to V
will be drawn from the supply with the highest voltage either V
BLOCK DIAGRAM Figure 1
* DS1836B and DS1836D
CC
CC
and will not switch back to V
and will not switch back to V
BAT
BAT
input until V
input until V
OUT
OUT
output between V
output between V
CC
CC
BAT
BAT
exceeds 3.9V. When V
exceeds 2.8V. When V
until V
until V
CC
CC
CC
returns to a valid state the RST will remain active for
drops below 3.8V. When V
CC
drops below 2.6V. When V
CC
2 of 9
and V
and V
BAT
BAT
CC
CC
CC
CC
CC
exceeds 3.9V V
exceeds 2.8V V
. On the initial power up, V
. On the initial power-up, V
or V
out-of-tolerance condition.
or V
BAT
BAT
.
.
CC
CC
OUT
OUT
CC
is below 3.8V, power
is below 2.6V, power
switches from V
switches from V
is detected as out of
DS1836A/B/C/D
OUT
OUT
draws
draws
BAT
BAT