Texas Instruments LM393LVWDSGRQ1

Overview

LM393LVWDSGRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual automotive voltage comparator with rail-to-rail inputs, 1.65 V to 5.5 V supply range, 400 µV typical input offset voltage, 600 ns typical propagation delay, and open-drain outputs. It operates across –40°C to +125°C and features Power-On-Reset (POR) for known startup behavior in server PSU and motor drive control circuits.

For engineers reviewing the LM393LVWDSGRQ1 datasheet, LM393LVWDSGRQ1 pinout, LM393LVWDSGRQ1 application, or LM393LVWDSGRQ1 equivalent, key selection criteria include its low 25 µA/ch quiescent current, 5 pA typical input bias current, rail-to-rail input capability up to 6 V, failsafe operation, and qualification for automotive-grade thermal and ESD robustness.

Technical Context

The LM393LVWDSGRQ1 implements a dual independent comparator architecture with separate IN1±/IN2± differential inputs and open-drain OUT1/OUT2 outputs. Its internal POR circuit holds outputs in high-impedance state until supply reaches minimum operating voltage, preventing transients during power-up/down.

Rail-to-rail input stage supports common-mode voltages from GND to V+, with no phase inversion or damage up to 6 V. Input bias current remains stable at 5 pA typ across temperature, enabling high-impedance sensing in battery-powered and precision threshold-detection applications.

Key Specifications

Pinout & Package

LM393LVWDSGRQ1 is packaged in an 8-pin WSON (DSG) package measuring 2.00 mm × 2.00 mm with exposed thermal pad. The package is optimized for space-constrained automotive PCB layouts and requires direct connection of the thermal pad to GND for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393LVDRQ1 and TL331LVQDBVRQ1, LM393LVWDSGRQ1 delivers identical electrical performance in a 60% smaller footprint with superior thermal resistance (175.2°C/W), making it optimal for high-density automotive modules requiring dual independent comparisons.

Availability

LM393LVWDSGRQ1 is available at Aetrix Electronics and suitable for server PSU, motor drives, infotainment systems, and appliance control requiring stable component supply across automotive production lifecycles.

Supply support for LM393LVWDSGRQ1 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 automotive, industrial, personal electronics, and communications markets.

LM393LVWDSGRQ1 belongs to TI's LV-Q1 automotive comparator family, designed specifically to replace legacy LM393-Q1 devices in ≤5 V systems with enhanced rail-to-rail input, lower quiescent current, and integrated POR for reliable power sequencing.

FAQ

What is the maximum input voltage allowed on the IN+ and IN− pins of LM393LVWDSGRQ1?

The LM393LVWDSGRQ1 supports rail-to-rail inputs with absolute maximum rating of –0.3 V to 6 V referenced to GND. This allows direct connection of signals up to 6 V without external clamping, even when V+ = 1.65 V - critical for high-side sensing in 12 V automotive domains with level-shifted references.

Does LM393LVWDSGRQ1 require external pull-up resistors on its outputs?

Yes, LM393LVWDSGRQ1 features open-drain outputs (OUT1 and OUT2) and requires external pull-up resistors to V+ or another logic rail. Typical values range from 2.2 kΩ to 10 kΩ depending on rise time and bus loading requirements; mismatched pull-ups may cause timing skew between channels.

How does the Power-On-Reset (POR) function affect system startup behavior of LM393LVWDSGRQ1?

The POR circuit in LM393LVWDSGRQ1 holds both outputs in high-impedance state until V+ reaches ≥1.65 V and stabilizes. This prevents false triggering during cold-cranking (e.g., 6–9 V cranking dips) and ensures deterministic startup - essential for safety-critical functions like motor enable/disable sequencing.

Can LM393LVWDSGRQ1 operate reliably at 1.65 V supply voltage across the full –40°C to +125°C range?

Yes, LM393LVWDSGRQ1 is fully specified at 1.65 V minimum supply across –40°C to +125°C. Electrical characteristics including 600 ns propagation delay, 25 µA/ch quiescent current, and ±0.4 mV offset voltage are guaranteed at this voltage, enabling ultra-low-power always-on monitoring in battery-backed modules.

Is the exposed thermal pad on the WSON package of LM393LVWDSGRQ1 electrically connected internally?

No, the exposed thermal pad on the LM393LVWDSGRQ1 DSG package is not internally connected to any die node. It must be soldered directly to a GND plane on the PCB to provide thermal conduction and reduce junction-to-board thermal resistance by ~40°C/W - failure to connect degrades long-term reliability under sustained 125°C ambient operation.