OUT

+

-

IN+

IN-

Bias

Power-On-Reset

(POR)

VCC

GND

SNAPBACK

ESD

CLAMPS

GND

GND

GND

Output

Control

GND

VCC

9

LM393LV-Q1

www.ti.com

SNOSDB3 – JUNE 2020

Product Folder Links: LM393LV-Q1

Submit Documentation Feedback

Copyright © 2020, Texas Instruments Incorporated

9 Detailed Description

9.1 Overview

The LV Family devices are micro-power comparators with open-drain outputs and improved input offset voltage

that operate down to 1.65 V while only consuming only 25 µA per channel. The LV family are ideally suited for

portable, automotive and industrial applications. An internal power-on reset circuit ensures that the output

remains in a known state during power-up and power-down while fail-safe inputs can tolerate input transients

without damage or false outputs.

9.2 Functional Block Diagram

9.3 Feature Description

The LV family devices are micro-power comparators that have improved input offset voltages and are capable of

operating at low voltages. The LV family feature a rail-to-rail input stage capable of operating up to 100 mV

beyond the VCC power supply rails. The comparators also feature push-pull and open-drain output stage options

with internal 10 mV hysteresis and Power On Reset for known start-up conditions.

9.4 Device Functional Modes

9.4.1 Open Drain Output

The LV family features an open-drain (also commonly called open collector) sinking-only output stage enabling

the output logic levels to be pulled up to an external voltage from 0 V up to 5.5 V, independent of the comparator

level translation. TI recommends setting the pull-up resistor current to between 100uA and 1mA. Lower pull-up

dissipation. The risetime will be dependant on the time constant of the total pull-up resistance and total load

capacitance. Large value pull-up resistors (>1 MΩ) will create an exponential rising edge due to the RC time

constant and increase the risetime.

Unused open drain outputs should be left floating, or can be tied to the GND pin if floating pins are not allowed.

While an individual output can typically sink up to 100 mA, the total combined current for all channels must be

less than 200 mA.