LTC1540CS8#PBF

Overview

The LTC1540CS8#PBF is a nanopower comparator with an integrated reference, housed in an 8-lead plastic SO package. It operates from a single 2V to 11V supply or dual ±1V to ±5.5V supplies. The device features ultralow quiescent current of 0.3µA typical and includes a 1.182V ±2% reference output capable of driving up to 0.01µF capacitors. It offers adjustable hysteresis via the HYST pin, TTL/CMOS compatible outputs sourcing up to 40mA, and propagation delay of 60µs with 10mV overdrive.

Feature Summary

• Ultralow power consumption with less than 0.6µA supply current
• Integrated 1.182V reference output drives bypass capacitors without oscillation
• Programmable hysteresis using external resistors connected to the HYST pin
• Glitch-free CMOS output stage eliminates crowbar switching currents

Applications

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

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS status. Confirm the CS8 designation corresponds to the commercial temperature range (0°C to 70°C) and the 8-lead SOIC package. Ensure the source documentation matches the manufacturer's official datasheet for the LTC1540 series to validate electrical characteristics and pin configurations.

Selection Notes

Select this component for applications requiring minimal static power draw and precise voltage threshold detection. The built-in reference simplifies design by removing the need for external voltage references. Consider the wide input common-mode range and high output drive capability when interfacing with various logic families or loads.

Part Context

This part belongs to the LTC1540 family of nanopower comparators. It is pin-compatible with the LTC1440 and certain Maxim Integrated parts like the MAX921 and MAX931. The family includes variants in DFN and MSOP packages, offering flexibility for space-constrained designs while maintaining identical functional performance across package types.

Replacement Considerations

The LTC1440 is a pin-compatible alternative within the same product family. Verify that the replacement meets the specific temperature grade and package requirements of the original design.