Texas Instruments LM339LVRTER

Overview

LM339LVRTER 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 threshold detection in server PSUs and motor drives.

For engineers reviewing the LM339LVRTER datasheet, LM339LVRTER pinout, LM339LVRTER application, or LM339LVRTER equivalent, key selection criteria include its rail-to-rail input capability up to 6 V without damage, Power-On-Reset (POR) for known startup state, and compatibility with low-voltage systems where legacy LM339 cannot operate below 2 V.

Technical Context

The LM339LVRTER implements a comparator architecture with internal POR circuitry that forces output into high-impedance until V_CC exceeds minimum operating voltage, preventing transients during power-up/down. Its rail-to-rail input stage accepts common-mode voltages from GND to V_CC + 0.1 V, with no phase inversion or damage up to 6 V.

Each of the four independent comparators features 5 pA typical input bias current, 2–3 pF input capacitance, and open-drain outputs capable of sinking 60–100 mA while maintaining ≤300 mV VOL at 4 mA load across temperature.

Key Specifications

Pinout & Package

LM339LVRTER is packaged in a 14-pin thin SOT-23 (SOT-23-THIN) with nominal body size 4.20 mm × 2.00 mm. The package uses a standard leadframe layout compatible with automated pick-and-place and reflow processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339LVDR and TL339IPWR, LM339LVRTER offers the smallest footprint among quad LV comparators, lowest power consumption, and integrated POR-making it optimal for space-constrained, always-on, and safety-critical embedded power management.

Availability

LM339LVRTER is available at Aetrix Electronics and suitable for server PSU monitoring, motor drive fault detection, and factory automation sensors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM339LVRTER 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

LM339LVRTER belongs to TI's LV comparator product line, engineered specifically to replace legacy 5 V comparators in low-voltage systems while adding POR, rail-to-rail input, and extended temperature operation.

FAQ

What is the maximum input voltage allowed on LM339LVRTER pins?

The LM339LVRTER supports input voltages from GND to V_CC + 0.1 V under normal operation, with absolute maximum rating of –0.3 V to 6 V. This rail-to-rail input capability allows direct connection to 5 V signals even when powered from 3.3 V, eliminating external level shifters. The device includes internal snapback ESD clamps rated for ±2 kV HBM.

Does LM339LVRTER require external pull-up resistors on its outputs?

Yes, LM339LVRTER features open-drain outputs and requires external pull-up resistors to define the high-state voltage level. Pull-up values between 1 kΩ and 10 kΩ are typical; lower values improve rise time but increase power draw. The LM339LVRTER can sink up to 100 mA per output, supporting direct interface with LEDs, optocouplers, or microcontroller GPIOs.

How does the Power-On-Reset (POR) feature function in LM339LVRTER?

The POR circuit in LM339LVRTER holds all four outputs in high-impedance until V_CC rises above 1.65 V and stabilizes. This prevents undefined output states during power ramp-up or brownout events. Once enabled, the LM339LVRTER begins normal comparison immediately-no external reset signal or timing delay is needed.

Can LM339LVRTER operate from a 1.8 V supply?

Yes, LM339LVRTER is fully specified for operation from 1.65 V to 5.5 V. At 1.8 V, it maintains 400 µV typical input offset voltage, 600 ns typical propagation delay, and 25 µA per channel quiescent current. Input common-mode range extends from GND to 1.9 V, enabling direct sensing of low-voltage references or battery levels.

What is the thermal performance of LM339LVRTER in SOT-23-THIN package?

In the SOT-23-THIN (DYY) package, LM339LVRTER has a junction-to-ambient thermal resistance (R_θJA) of 211.1 °C/W. With 100 µA total supply current at 5 V, power dissipation remains below 0.5 mW-well within safe limits even in sealed enclosures. No heatsink or thermal pad is required for standard industrial operation.