LTC1542CMS8#TRPBF

Overview

The LTC1542CMS8#TRPBF is a micropower analog comparator housed in an 8-lead MSOP package. It operates from a single supply voltage range of 2.5V to 12.6V or dual supplies of ±1.25V to ±6.3V, with a typical supply current of 5µA. The device features rail-to-rail output capability and a common-mode input range extending from the negative supply to within 1.3V of the positive supply. Electrical specifications include a maximum input offset voltage of 2mV for the commercial grade, a propagation delay of 8µs at 100mV overdrive, and a typical gain-bandwidth product of 12kHz.

Feature Summary

• Integrates a micropower amplifier and comparator with rail-to-rail output stages
• Features internal hysteresis to ensure clean switching on slow-moving signals
• Supports low-voltage operation with minimal quiescent current consumption
• Input common mode range includes ground potential

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging configuration. Confirm the 'C' designation corresponds to the commercial temperature grade requirements. Ensure the MSOP package outline matches the target PCB footprint dimensions. Cross-reference the datasheet revision date against manufacturing lot codes for compliance.

Selection Notes

Select this component when a combined op amp and comparator solution is required in a space-constrained design. The part is suitable for applications needing rail-to-rail performance with low power consumption. Consider the commercial temperature grade limits if operating outside standard industrial ranges. Verify that the 12kHz bandwidth meets the signal processing speed requirements.

Part Context

This part belongs to the LTC1541/LTC1542 family of micropower amplifiers and comparators. The LTC1542 variant specifically provides independent comparator inputs rather than the internally referenced configuration found in the LTC1541. Both share identical pinouts and electrical characteristics for the amplifier section.

Replacement Considerations

The datasheet identifies the MAX951 and MAX953 as pin-compatible upgrades. Verify functional equivalence regarding input offset voltage and propagation delay before substitution.