LTC1443IS

Overview

The LTC1443IS is an ultralow power quad comparator with a built-in reference, housed in a 16-lead plastic SO package. It operates from a single 2V to 11V supply or a dual ±1V to ±5.5V supply. The device features less than 8.5µA supply current over temperature and includes a 1.182V ±1% internal reference for the LTC1443 variant. Outputs are TTL/CMOS compatible, capable of sourcing up to 40mA continuously. Input common mode range extends from the negative supply to within 1.3V of the positive supply.

Feature Summary

• Ultralow quiescent current consumption across operating temperatures
• Integrated bandgap voltage reference output
• TTL and CMOS compatible open-collector outputs
• Elimination of crowbar switching currents during state transitions

Applications

• Battery-powered system monitoring
• Threshold detectors
• Window comparators
• Oscillator circuits

Procurement Notes

Verify the specific suffix IS indicates industrial temperature grade (-40°C to 85°C) and SOIC packaging. Confirm lead-free finish status via PBF designation. Ensure compatibility with existing PCB footprints for 16-lead narrow small outline packages before integration.

Selection Notes

Select this component when low static power is critical alongside integrated reference functionality. The LTC1443 provides fixed thresholding without external resistor dividers. Consider the LTC1444 if programmable hysteresis is required instead of the fixed configuration found in the LTC1443.

Part Context

Part of the Linear Technology ultralow power comparator family including LTC1444 and LTC1445 variants. Designed for applications requiring minimal standby current while maintaining precise voltage comparison capabilities. Pin-compatible upgrades available for MAX924 designs.

Replacement Considerations

LTC1444IS offers pin-compatible operation with added programmable hysteresis capability. Verify output stage requirements as LTC1443 uses open-drain outputs while other family members may differ.