LTC1542IDD#TRPBF

Overview

The LTC1542IDD#TRPBF is a micropower analog comparator housed in an 8-lead, 3mm x 3mm DFN package. It operates on a single supply voltage ranging from 2.5V to 12.6V with a typical quiescent current of 5µA. The device features a CMOS output capable of driving TTL and CMOS loads, with a propagation delay of 8µs at 100mV overdrive. Input common mode range extends from the negative rail to within 1.3V of the positive rail.

Feature Summary

• Integrates internal hysteresis for clean switching on slow-moving signals
• Provides rail-to-rail output swing capability
• Supports input common mode range including ground potential

Applications

• Battery-powered systems
• Automotive keyless entry
• Low frequency local area alarms or detectors
• Infrared receivers for remote controls
• Smoke detectors and safety sensors

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging and lead-free compliance when ordering. Confirm the industrial grade designation matches the required operating temperature range of -40°C to 85°C. Ensure the DFN package footprint aligns with the recommended solder pad layout provided in the datasheet to prevent thermal or mechanical issues during assembly.

Selection Notes

Select this component when low power consumption is critical alongside precise threshold detection. The integrated hysteresis eliminates the need for external feedback components in noisy environments. Verify that the required output drive current does not exceed the specified limits for the target load impedance. Consider the DFN package size constraints against available PCB real estate.

Part Context

This part belongs to the LTC1541/LTC1542 family of micropower amplifiers and comparators. While the LTC1541 includes an internal bandgap reference connected to the comparator's inverting input, the LTC1542 provides a dedicated inverting input pin for external signal comparison. Both share identical op amp characteristics and package options.

Replacement Considerations

The datasheet identifies the MAX951 and MAX953 as pin-compatible upgrades.