LTC1542CDD#TRPBF

Overview

The LTC1542CDD#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 rail-to-rail swing and includes internal hysteresis for clean switching. Input common mode range extends from the negative supply to within 1.3V of the positive rail.

Feature Summary

• Integrates a micropower comparator with internal hysteresis for stable signal detection
• CMOS output stage provides rail-to-rail voltage swing capabilities
• Input common mode range includes ground potential for single-supply flexibility

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging and lead-free compliance. Confirm the DD package designation matches the required 3mm x 3mm DFN footprint. Ensure the commercial grade temperature rating aligns with system operational requirements.

Selection Notes

Select this component when a dedicated comparator with built-in hysteresis is preferred over op-amp configurations. The integrated hysteresis eliminates external resistor networks typically needed for noise immunity. Verify that the 12kHz bandwidth meets the signal frequency requirements.

Part Context

This part belongs to the LTC1541/LTC1542 family of micropower amplifiers and comparators. While the LTC1541 integrates a reference and connects it to the comparator input, the LTC1542 provides independent comparator inputs. Both share identical pinouts and electrical characteristics except for the reference functionality.

Replacement Considerations

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