LTC2901 Series

Programmable Quad Supply Monitor with Adjustable Reset and Watchdog Timers

Catalog

Programmable Quad Supply Monitor with Adjustable Reset and Watchdog Timers

Part	Package / Case	Package / Case	Package / Case	Type	Mounting Type	Supplier Device Package	Reset Timeout	Number of Voltages Monitored	Operating Temperature [Max]	Operating Temperature [Min]	Output	Reset	Voltage - Threshold
Analog Devices LTC2901-4CGN#TRPBF	0.154 in	16-SSOP	3.9 mm	Multi-Voltage Supervisor	Surface Mount	16-SSOP	5 ms	4	70 °C	0 °C	Push-Pull Totem Pole	Active Low	16 Selectable Threshold Combinations
Analog Devices LTC2901-1CGN#TRPBF	0.154 in	16-SSOP	3.9 mm	Multi-Voltage Supervisor	Surface Mount	16-SSOP	5 ms	4	70 °C	0 °C	Open Drain or Open Collector	Active Low	16 Selectable Threshold Combinations
Analog Devices LTC2901-2CGN#PBF	0.154 in	16-SSOP	3.9 mm	Multi-Voltage Supervisor	Surface Mount	16-SSOP	5 ms	4	70 °C	0 °C	Push-Pull Totem Pole	Active Low	16 Selectable Threshold Combinations
Analog Devices LTC2901-3CGN#PBF	0.154 in	16-SSOP	3.9 mm	Multi-Voltage Supervisor	Surface Mount	16-SSOP	5 ms	4	70 °C	0 °C	Open Drain or Open Collector	Active Low	16 Selectable Threshold Combinations
Analog Devices LTC2901-2CGN#PBF	0.154 in	16-SSOP	3.9 mm	Multi-Voltage Supervisor	Surface Mount	16-SSOP	5 ms	4	70 °C	0 °C	Push-Pull Totem Pole	Active Low	16 Selectable Threshold Combinations
Analog Devices LTC2901-3CGN#TRPBF	0.154 in	16-SSOP	3.9 mm	Multi-Voltage Supervisor	Surface Mount	16-SSOP	5 ms	4	70 °C	0 °C	Open Drain or Open Collector	Active Low	16 Selectable Threshold Combinations
Analog Devices LTC2901-2IGN#PBF	0.154 in	16-SSOP	3.9 mm	Multi-Voltage Supervisor	Surface Mount	16-SSOP	5 ms	4	85 °C	-40 °C	Push-Pull Totem Pole	Active Low	16 Selectable Threshold Combinations
Analog Devices LTC2901-1CGN#PBF	0.154 in	16-SSOP	3.9 mm	Multi-Voltage Supervisor	Surface Mount	16-SSOP	5 ms	4	70 °C	0 °C	Open Drain or Open Collector	Active Low	16 Selectable Threshold Combinations
Analog Devices LTC2901-2CGN#TRPBF	0.154 in	16-SSOP	3.9 mm	Multi-Voltage Supervisor	Surface Mount	16-SSOP	5 ms	4	70 °C	0 °C	Push-Pull Totem Pole	Active Low	16 Selectable Threshold Combinations

Catalog

Programmable Quad Supply Monitor with Adjustable Reset and Watchdog Timers

Key Features

• Simultaneously Monitors Four Supplies

• 16 User Selectable Combinations of 5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V and/or ±Adj Voltage Thresholds

• Guaranteed Threshold Accuracy: ±1.5% of Monitored Voltage Over Temperature

• Selectable Supply Tolerance: 5% and 10% Below Monitored Voltage (LTC2901-3/LTC2901-4)

• Low Supply Current: 43µA Typ

• Adjustable Reset Time

• Adjustable Watchdog Time

• Open-DrainRSTOutput (LTC2901-1/LTC2901-3)

• Push-PullRSTOutput (LTC2901-2/LTC2901-4)

• Individual Nondelayed Monitor Output for Each Supply

• Power Supply Glitch Immunity

• GuaranteedRSTfor VCC≥ 1V

• 16-Lead Narrow SSOP Package

Description

The LTC2901 is a programmable supply monitor for systems with up to four supply voltages. One of 16 preset or adjustable voltage monitor combinations can be selected using an external resistor divider connected to the program pin. The preset voltage thresholds are accurate to ±1.5% over temperature. All four voltage comparator outputs are connected to separate pins for individual supply monitoring.The reset and watchdog delay times are adjustable using external capacitors. Tight voltage threshold accuracy and glitch immunity ensure reliable reset operation without false triggering. TheRSToutput is guaranteed to be in the correct state for VCCdown to 1V. The LTC2901-1/LTC2901-3 features an open-drainRSToutput, while the LTC2901-2/LTC2901-4 has a push-pullRSToutput.The 43µA supply current makes the LTC2901 ideal for power conscious systems and it may be configured to monitor less than four inputs. The parts are available in the 16-lead narrow SSOP package.ApplicationsDesktop and Notebook ComputersMultivoltage SystemsTelecom EquipmentPortable Battery-Powered EquipmentNetwork Servers