LT1671IS8

Overview

The LT1671IS8 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 4.0mV, positive supply current of 450µA, and output drive capability of 4mA. It functions within a temperature range of -40°C to +85°C.

Feature Summary

• Complementary CMOS/TTL compatible outputs for direct logic interfacing
• Internal latch mechanism for data retention
• Ground-sensing inputs extending to the negative supply rail
• Stable operation without minimum input slew rate requirements

Applications

• High speed A/D converters
• Zero-crossing detectors
• Current sense for switching regulators
• Fast pulse height/width discriminators
• Line receivers

Procurement Notes

Verify the specific IS8 suffix indicates the industrial temperature grade (-40°C to +85°C) compared to the CS8 commercial variant. Confirm package type matches SOIC-8 specifications. Ensure compatibility with required supply voltages and logic levels before integration into final designs.

Selection Notes

Select this component when ground-sensing inputs are required alongside low power consumption. The integrated latch simplifies timing circuits by retaining state. Consider the 60ns propagation delay for high-speed applications. Verify that the 4mA output drive meets load requirements for connected logic families.

Part Context

This device belongs to the LT1671 series of comparators designed for precision and speed. It shares pinouts with related parts like the LT1394 and LT1016, facilitating design upgrades. The IS8 designation specifies the extended temperature range and plastic small outline package format.

Replacement Considerations

LT1671CS8#PBF

FAQ

Does the LT1671 require a minimum input slew rate?

No, the LT1671 remains stable even for slow transitions through the active region, eliminating the need for a minimum input slew rate specification.

How does the LATCH pin function?

Holding the LATCH pin high retains the current output state independent of input changes. Data must be valid during specific setup and hold times relative to the latch signal transition.