DS1810R-15-U Maxim Integrated, DS1810R-15-U Datasheet - Page 2

• Manufacturer Part Number: DS1810R-15-U
• Description: Supervisory Circuits
• Manufacturer: Maxim Integrated
• Series: DS1810r

Specifications of DS1810R-15-U

• Number Of Voltages Monitored: 1
• Monitored Voltage: 1.2 V to 5.5 V
• Undervoltage Threshold: 4 V
• Overvoltage Threshold: 4.24 V
• Output Type: Active Low, Push-Pull
• Manual Reset: Not Resettable
• Watchdog: No Watchdog
• Battery Backup Switching: No Backup
• Power-up Reset Delay (typ): 300 ms
• Supply Voltage - Max: 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOT-23
• Chip Enable Signals: No
• Minimum Operating Temperature: - 40 C
• Power Fail Detection: Yes
• Supply Current (typ): 40 uA
• Supply Voltage - Min: 1.2 V
• Part # Aliases: 90-1810R-U15

OPERATION - POWER MONITOR
The DS1810 provides the function of detecting out-of-tolerance power supply conditions and warning a
processor-based system of impending power failure. When V
signal is asserted. On power-up,
reached the selected tolerance. This allows the power supply and microprocessor to stabilize before
is released.
BLOCK DIAGRAM (PUSH-PULL OUTPUT) Figure 1
APPLICATION EXAMPLE Figure 2
OUTPUT VALID CONDITIONS
All versions of the DS1810 can maintain a valid output as long as V
the
volts on an input. To sink current below 1.2 volts, a resistor can be connected from
Figure 3). This arrangement will maintain a valid value on the
volts. During both power-up and -down this arrangement will draw current when
A value of about 100 kV should be adequate to maintain a valid condition.
RST
outputs on the DS1810 use a push-pull structure which can maintain a valid output below 1.2
RST
is kept active for approximately 150 ms after the power supply has
2 of 5
CC
is detected as out-of-tolerance, the
RST
CC
outputs even it V
remains above 1.2 volt. However,
RST
RST
is in the high state.
CC
to Ground (see
approaches 0
DS1810
RST
RST