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Updated at 17/06/2025 10:30:15(UTC+8)

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Description

DESCRIPTION
The UC1903 family of quad supply and line monitor integrated circuits will respond to under- and over-voltage conditions on up to four continuously monitored voltage levels. An internal op-amp inverter allows at least one of these levels to be negative. A separate line/switcher sense input is available to provide early warning of line or other power source failures.
FEATURES
• Inputs for Monitoring up to Four Separate Supply Voltage Levels
• Internal Inverter for Sensing a Negative Supply Voltage
• Line/Switch Sense Input for Early Power Source Failure Warning
• Programmable Under- and Over-Voltage Fault Thresholds with Proportional Hysteresis
• A Precision 2.5-V Reference
• General Purpose Op-Amp for Auxiliary Use
• Three High Current, >3 0mA, Open-Collector Outputs Indicate Over-Voltage, Under-Voltage and Power OK Conditions
• 8-V to 40-V Supply Operation with 7-mA Stand-By Current

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UC2903DW Specifications

Attribute	Attribute Value

Datasheet	Datasheet
3D Model	3D Model
Mounting Style	Surface Mount
Number of Pins	18 Pin
Case/Package	SOIC-18
Supply Voltage (DC)	8.00V (min)
Supply Current	15 mA
Power Dissipation	1 W
Quiescent Current	7.00 mA
Threshold Voltage	Adjustable
Reset Threshold Voltage (Min)	Adjustable
Reset Threshold Voltage (Max)	Adjustable
Operating Temperature (Max)	85 ℃
Operating Temperature (Min)	-40 ℃
Power Dissipation (Max)	1000 mW
Supply Voltage (Max)	40 V
Supply Voltage (Min)	8 V
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Size-Length	11.62 mm
Size-Width	7.52 mm
Size-Height	2.35 mm
Operating Temperature	-40℃ ~ 85℃ (TA)
Product Lifecycle Status	Active
Packaging	Tube
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/06/15
ECCN Code	EAR99

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