LT1671CS8#PBF

Overview

The LT1671CS8#PBF is a low-power, single-supply comparator featuring complementary outputs and an internal latch. It operates from a single 5V supply or dual ±5V supplies with a propagation delay of 60ns at 20mV overdrive. The input common-mode range extends to the negative supply rail. Key electrical parameters include a maximum input offset voltage of 4mV, a typical positive supply current of 450µA, and a common-mode rejection ratio of 100dB. It provides active drive in both directions for fast transitions into TTL or CMOS logic.

Feature Summary

• Features complementary outputs designed for direct interface with TTL or CMOS logic families.
• Includes an internal latch mechanism that retains output data when the control pin is asserted high.
• Input common-mode range extends down to the negative supply rail without phase reversal.
• Maintains stability during slow signal transitions through the active region without requiring a minimum slew rate.

Applications

• High-speed analog-to-digital converter front-ends
• Zero-crossing detectors
• Current sensing circuits for switching regulators
• Fast pulse height and width discriminators

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm package type and temperature grade. Ensure the ordering information matches the required lead frame finish and RoHS compliance status. Cross-reference the part number with authorized distributors to confirm availability and authenticity before procurement.

Selection Notes

Select this component for applications requiring ground-sensing inputs and integrated data retention. It is suitable for designs needing stable performance with slow input signals. Verify that the supply voltage constraints and output drive requirements align with the system's logic levels and load characteristics.

Part Context

This device belongs to the LT1671 family of precision comparators. It shares pin compatibility with similar industry-standard parts like the LT1394 and LT1016. The series is characterized by low power consumption combined with high speed, making it distinct from faster but higher-power alternatives.

Replacement Considerations

LT1394CS8#PBF

FAQ

How does the LATCH pin function?

When the LATCH pin is held high, the outputs retain their state regardless of the input signals. To allow normal operation, the pin must be grounded.

Can the inputs exceed the supply voltages?

Yes, either input may go above the positive supply voltage without causing phase reversal or damage, provided the current remains within limits.