RT9818C-25GB Richtek USA Inc, RT9818C-25GB Datasheet - Page 9

• Manufacturer Part Number: RT9818C-25GB
• Description: IC VOLT DETECTOR 2.5V SOT23-5
• Manufacturer: Richtek USA Inc
• Type: Simple Reset/Power-On Resetr

Specifications of RT9818C-25GB

• Number Of Voltages Monitored: 1
• Output: Open Drain or Open Collector
• Reset: Active Low
• Reset Timeout: 143 ms Minimum
• Voltage - Threshold: 2.5V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SC-74A, SOT-753
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RT9818
Application Information
Multiple Supplies
Mainly, the pull-up connected to the RT9818 will connect to the supply voltage that is being monitored at the IC's
VDD
pin.
However, some systems may use the open-drain output to level-shift from the monitored supply to reset circuitry powered
by some other supply.
Benefits of Highly Accurate Reset Threshold
Most μP supervisor ICs have reset threshold voltages between 1% and 1.5% below the value of nominal supply voltages.
This ensures a reset will not occur within 1% of the nominal supply, but will occur when the supply is 1.5% below
nominal.
DS9818-09 April 2011
www.richtek.com
9