Texas Instruments LM339LVPWR

Overview

LM339LVPWR from Texas Instruments is a quad 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, 25 µA/Ch typical quiescent current, and full –40°C to +125°C operation-ideal for precision voltage monitoring in server PSUs and motor drives.

For engineers reviewing the LM339LVPWR datasheet, LM339LVPWR pinout, LM339LVPWR application, or LM339LVPWR equivalent, this page provides verified package mapping (TSSOP-14), confirmed rail-to-rail input with failsafe, Power-On-Reset behavior, ESD rating (±2 kV HBM), and direct replacement guidance for legacy LM339 in ≤5 V systems.

Technical Context

The LM339LVPWR implements four independent comparators with rail-to-rail input stages capable of accepting common-mode voltages up to 6 V without damage or phase inversion. Its internal Power-On-Reset circuit holds outputs in high-impedance state until supply reaches minimum operating voltage, eliminating power-up transients.

Each channel features ultra-low input bias current (5 pA typical) and low input offset drift (±1.5 µV/°C), enabling accurate threshold detection across wide temperature and supply ranges. The open-drain output supports flexible pull-up configurations and wired-OR logic implementation.

Key Specifications

Pinout & Package

TSSOP-14 package (4.40 mm × 5.00 mm body size) with exposed thermal pad connected directly to GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad comparator applications.

Compared with LM339PW and TL334IPW, LM339LVPWR uniquely combines rail-to-rail input, POR, ultra-low bias current, and open-drain flexibility in a single TSSOP-14 package-making it optimal for precision, low-voltage, safety-critical monitoring where startup reliability and sensor interface fidelity are essential.

Availability

LM339LVPWR is available at Aetrix Electronics and suitable for server PSU monitoring, motor drive protection, and factory automation I/O requiring stable component supply and long-term industrial lifecycle support.

Supply support for LM339LVPWR 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 LM339LV family was designed specifically to replace legacy comparators in low-voltage (≤5 V) systems-delivering improved accuracy, lower power, wider temperature range, and enhanced robustness without PCB redesign.

FAQ

What is the maximum input voltage allowed on LM339LVPWR pins?

The LM339LVPWR supports input voltages from –0.3 V to 6 V relative to GND, independent of supply voltage. This rail-to-rail input capability with failsafe design prevents damage or phase inversion even when inputs exceed V+, making it suitable for interfacing with higher-voltage sensors or legacy 5 V logic in 3.3 V systems. Always observe absolute maximum ratings in Section 5.1 of the datasheet.

Does LM339LVPWR require external pull-up resistors on its outputs?

Yes, LM339LVPWR has 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. The device sinks up to 100 mA in short-circuit condition, so ensure the pull-up resistor and associated node can tolerate the resulting power dissipation during fault conditions.

How does the Power-On-Reset (POR) feature function in LM339LVPWR?

The POR circuit in LM339LVPWR holds all four outputs in high-impedance state until V+ rises above ~1.65 V. This prevents undefined or transient output states during power ramp-up or brownout recovery. Once enabled, outputs respond normally to input conditions. POR is internal and requires no external components-critical for reliable system initialization in server PSUs and motor controllers.

Can LM339LVPWR replace standard LM339 in existing designs?

LM339LVPWR is a drop-in replacement for LM339 in ≤5 V applications with identical pinout in TSSOP-14 (PW package). It improves upon the legacy part with lower supply voltage (down to 1.65 V), 4× lower quiescent current, 5× lower input offset, and integrated POR. No layout changes are needed, but verify that the 600 ns propagation delay and rail-to-rail input behavior align with your timing and signal chain requirements.

What is the thermal pad connection requirement for LM339LVPWR in TSSOP-14?

The exposed thermal pad on the underside of the LM339LVPWR TSSOP-14 package must be soldered directly to a GND plane. This connection serves both thermal dissipation (reducing θJA by ~20°C/W) and electrical grounding for ESD protection. TI recommends using 4–9 thermal vias (0.3 mm diameter) under the pad, filled or capped, connected to an inner-layer GND plane for optimal performance and reliability.