LTC1985-1.8 Series

Micropower Precision Triple Supply Monitor with Push-Pull Reset Output in a 5-Lead SOT-23 Package

Catalog

Micropower Precision Triple Supply Monitor with Push-Pull Reset Output in a 5-Lead SOT-23 Package

Part	Output	Operating Temperature [Max]	Operating Temperature [Min]	Type	Mounting Type	Reset Timeout [Min]	Reset	Number of Voltages Monitored	Package / Case	Voltage - Threshold	Voltage - Threshold
Analog Devices LTC1985ES5-1.8#TRMPBF	Open Drain or Open Collector	85 °C	-40 °C	Multi-Voltage Supervisor	Surface Mount	140 ms	Active Low	3	SOT-23-5 Thin TSOT-23-5	1.683 V 2.805 V	Adj

Catalog

Micropower Precision Triple Supply Monitor with Push-Pull Reset Output in a 5-Lead SOT-23 Package

Key Features

• Monitors Three Inputs Simultaneously:3V, 1.8V and Adjustable

• 3V, 1.8V and Adjustable

• ±1.5% Threshold Accuracy Over Temperature

• Very Low Supply Current: 10µA Typ

• 200ms Reset Time Delay

• Power Supply Glitch Immunity

• GuaranteedRESETfor VCC3≥ 1V or VCC18≥ 1V

• 3V Active-Low Push-Pull Reset Output

• 5-Lead SOT-23 Package

Description

The LTC1985-1.8 is a triple supply monitor intended for systems with multiple supply voltages. The reset output remains low until all three supplies have been in compliance for 200ms. Tight 1.5% accuracy specifications and glitch immunity ensure reliable reset operation without false triggering.TheRSToutput is guaranteed to be in the correct state for VCC18or VCC3down to 1V. The LTC1985 may also be configured to monitor any one or two VCCinputs instead of three, depending on system requirements.Very low (10µA typical) supply current makes the LTC1985 ideal for power conscious systems.The LTC1985 is available in a 5-lead SOT-23 package.ApplicationsDesktop ComputersNotebook ComputersIntelligent InstrumentsPortable Battery-Powered EquipmentNetwork Servers