LT1719IS8#TRPBF

Overview

The LT1719IS8#TRPBF is a single UltraFast comparator in an 8-lead SOIC package. It operates on a supply voltage range of 2.7V to 6V with a maximum propagation delay of 13ns at 5mV overdrive and 8ns at 20mV overdrive. The device features rail-to-rail CMOS/TTL compatible outputs, internal hysteresis of 7mV, and a low power shutdown mode drawing 0.1µA. Input offset voltage is typically 2.5mV, and it supports separate input and output power supplies for flexible logic level translation.

Feature Summary

• UltraFast response optimized for low voltage operation
• Rail-to-rail outputs directly interface to TTL and CMOS logic
• Separate input and output power supplies allow flexible analog and digital ranges
• Low power shutdown mode extends battery life in portable applications

Applications

• High speed differential line receiver
• Crystal oscillator circuits
• Level translators
• Threshold detectors and discriminators
• Zero-crossing detectors

Procurement Notes

Verify the specific IS8 suffix indicates the industrial temperature grade (-40°C to 85°C) and the TRPBF suffix denotes tape and reel packaging with lead-free finish. Confirm that the component matches the exact Analog Devices part number to ensure compatibility with design specifications regarding package dimensions and electrical characteristics.

Selection Notes

Select this component when high-speed comparison is required within a single supply or split supply architecture. The availability of separate power rails for input and output stages makes it suitable for translating between different voltage domains. Ensure the application benefits from the integrated hysteresis to prevent oscillation without external components.

Part Context

This part belongs to the LT1719 family of UltraFast comparators designed by Analog Devices. It is available in both SO-8 and SOT-23 packages. The IS8 variant specifically provides an extended industrial operating temperature range compared to the commercial CS8 version. It serves as a single-channel solution within a series that also includes dual and quad configurations.

Replacement Considerations

LT1719CS8#TRPBF

FAQ

How does the LT1719 handle phase reversal?

Phase reversal protection circuitry prevents false output inversion when both inputs are below the negative common mode limit, clamping the output to at least -400mV.

What is the function of the SHDN pin?

The SHDN pin controls the shutdown state; pulling it low enables the comparator, while a logic high disables it to reduce quiescent current consumption.