DESCRIPTIO U
The LTC ®1540 is an ultralow power, single comparator with built-in reference. The comparator’s features include less than 0.6µA supply current over the commer cial temperature range, a 1.182V ±2% reference, pro
grammable hysteresis and TTL/CMOS outputs that sink and source current. The reference output can drive a
bypass capacitor of up to 0.01µF without oscillation.

FEATURES
■ Ultralow Quiescent Current: 0.3µA Typ
■ Reference Output Drives 0.01µF Capacitor
■ Adjustable Hysteresis
■ Available in 3mm x 3mm x 0.8mm DFN Package
■ Wide Supply Range: 2V to 11V
■ Input Voltage Range Includes the Negative Supply
■ Reference Output Sources Up to 1mA
■ TTL/CMOS Compatible Outputs
■ 60µs Propagation Delay with 10mV Overdrive
■ No Crowbar Current
■ 40mA Continuous Source Current
■ Pin Compatible with LTC1440, MAX921, MAX931

APPLICATIONS
■ Battery-Powered System Monitoring
■ Threshold Detectors
■ Window Comparators
■ Oscillator Circuits