Texas Instruments LM393LVPWR

Overview

LM393LVPWR from Texas Instruments is a dual low-voltage rail-to-rail input comparator with open-drain outputs, operating from 1.65 V to 5.5 V supply. It delivers 400 µV typical input offset voltage, 600 ns typical propagation delay, and 25 µA per channel quiescent current across –40°C to +125°C. It serves as an improved replacement for legacy LM393 in ≤5 V systems such as server PSUs and motor drives.

For engineers reviewing the LM393LVPWR datasheet, LM393LVPWR pinout, LM393LVPWR application, or LM393LVPWR equivalent, key selection criteria include its rail-to-rail input capability up to 6 V without damage, Power-On-Reset (POR) ensuring high-impedance startup, and 2 kV HBM ESD rating for robust industrial deployment.

Technical Context

The LM393LVPWR integrates two independent comparators with internal POR circuitry that holds outputs in high-impedance state until V+ reaches minimum operating voltage, eliminating power-up transients. Its rail-to-rail input stage accepts common-mode voltages from GND to V+, including overvoltage tolerance up to 6 V.

Each comparator features ultra-low input bias current (5 pA typical) and low input offset drift (±1.5 µV/°C), enabling precision threshold detection in battery-powered and high-impedance sensor interfaces. The open-drain output supports flexible pull-up configurations and wired-OR logic implementation.

Key Specifications

Pinout & Package

LM393LVPWR is packaged in an 8-pin TSSOP (PW) with body size 3.00 mm × 4.40 mm, optimized for space-constrained industrial and computing applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-voltage comparator applications.

Compared with LM393DR and TL393IPWR, LM393LVPWR uniquely combines POR-enabled safe startup, 125°C operation, and 5 pA input bias-making it the only option qualified for high-reliability, low-power, wide-temperature embedded systems requiring deterministic initialization.

Availability

LM393LVPWR is available at Aetrix Electronics and suitable for server PSU monitoring, motor drive fault detection, vacuum robot safety interlocks, and wireless infrastructure power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM393LVPWR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The LM393LV family was designed specifically to replace legacy comparators in ≤5 V applications, adding POR, rail-to-rail inputs, and extended temperature operation while maintaining pin compatibility with industry-standard packages.

FAQ

What is the maximum input voltage allowed at the IN+ and IN– pins of LM393LVPWR?

The LM393LVPWR supports rail-to-rail input operation from GND to V+, and its inputs tolerate up to 6 V regardless of supply voltage-preventing damage or phase inversion during overvoltage transients. This specification is confirmed in Section 5.1 Absolute Maximum Ratings and Section 3 Description of the official datasheet (SNOSDA4D).

Does LM393LVPWR require external pull-up resistors on its outputs?

Yes, LM393LVPWR features open-drain outputs and requires external pull-up resistors to define the high-state voltage level. Typical values range from 2.2 kΩ to 10 kΩ depending on speed and load requirements. This architecture enables wired-OR logic and flexible voltage-level translation, as documented in Section 4.2 Pin Functions and Figure 4-3 of the datasheet.

How does the Power-On-Reset (POR) function affect LM393LVPWR output behavior during power-up?

The POR circuit in LM393LVPWR holds both outputs in high-impedance state until V+ rises above 1.65 V, preventing false logic transitions during supply ramp-up. Once enabled, outputs respond normally to input differentials. This behavior is specified in Section 3 Description and verified in Section 5.10 Switching Characteristics (PON = 50 µs).

Can LM393LVPWR operate reliably at 1.8 V supply voltage?

Yes, LM393LVPWR is fully specified down to 1.65 V supply and operates reliably at 1.8 V. Electrical characteristics-including 400 µV typical offset, 25 µA/ch quiescent current, and 600 ns propagation delay-are guaranteed across 1.65 V to 5.5 V per Sections 5.3, 5.9, and 5.10 of the datasheet.

What is the thermal resistance (RθJA) of LM393LVPWR in its TSSOP (PW) package?

The LM393LVPWR in the 8-pin TSSOP (PW) package has a junction-to-ambient thermal resistance (RθJA) of 221.7 °C/W, as listed in Section 5.5 Thermal Information of the datasheet. This value assumes standard JEDEC 2-layer board conditions and informs thermal design for continuous operation at maximum ambient temperatures.