LTC1540CDD#TRPBF

Overview

The LTC1540CDD#TRPBF is a nanopower comparator with an integrated reference, housed in an 8-lead (3mm × 3mm) plastic DFN package. It operates on a single supply from 2V to 11V or dual supplies of ±1V to ±5.5V. 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 without oscillation. Propagation delay is 60µs with 10mV overdrive. The CMOS outputs are TTL/CMOS compatible and can source up to 40mA continuously.

Feature Summary

• Ultralow power consumption with typical 0.3µA supply current
• Integrated 1.182V reference output drives capacitive loads
• Programmable hysteresis via external resistors
• Glitch-free switching eliminates crowbar currents

Applications

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

Procurement Notes

Verify the #TRPBF suffix indicates tape and reel packaging for automated assembly. Confirm the C grade corresponds to the commercial temperature range of 0°C to 70°C. Ensure the DFN package matches the footprint requirements. Check RoHS compliance status as specified in the ordering information.

Selection Notes

Select this component for space-constrained designs requiring low standby current. The wide input common mode range extends to the negative supply rail. Consider the 40mA output drive capability for direct interface applications. Verify that the 60µs propagation delay meets timing requirements.

Part Context

This part belongs to the LTC1540 series of nanopower comparators. It is pin-compatible with the LTC1440, MAX921, and MAX931. The DFN package offers a low profile suitable for portable electronics. The series provides options for industrial temperature ranges and different package styles like MSOP and SO.

Replacement Considerations

LTC1540CDD#PBF is the tube version of the same electrical specification.