Texas Instruments LM393PWRG4

Overview

LM393PWRG4 from Texas Instruments is a dual precision voltage comparator designed for single-supply operation across 2 V to 36 V, featuring ±0.37 mV typical input offset voltage, 200 µA per comparator quiescent current, 1 µs propagation delay, and rail-to-rail input capability including ground. It serves as a core signal-conditioning element in power supply monitoring, motor control feedback, and industrial sensor interfaces.

For engineers reviewing the LM393PWRG4 datasheet, LM393PWRG4 pinout, LM393PWRG4 application, or LM393PWRG4 equivalent, key selection criteria include its B-version enhanced specs (38 V abs max rating, 2 kV HBM ESD), SOIC-8 package compatibility, open-collector output drive strength (25 mA sink), and guaranteed operation over –40°C to +85°C.

Technical Context

The LM393PWRG4 implements two independent comparators with dedicated ESD clamps enabling 2 kV HBM robustness. Its input stage supports common-mode voltages down to ground and up to VCC – 2 V, while differential input range spans ±38 V - exceeding standard 36 V supply rails.

Output stages are open-collector NPN transistors compatible with TTL, MOS, and CMOS logic families via external pull-up. Propagation delay remains stable across supply voltages (5–36 V) and temperature (–40°C to +85°C), with low 1 µs typical response time under 5 mV overdrive conditions.

Key Specifications

Pinout & Package

LM393PWRG4 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package measuring 4.90 mm × 3.91 mm, with gull-wing leads optimized for automated PCB assembly and thermal performance up to 148.5°C/W junction-to-ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR, LM393PWRG4 provides identical functionality with formal RoHS certification and optimized packaging for high-volume SMT lines; versus LM2903PWR, it trades 40°C upper-temperature margin for lower unit cost and qualification focus on industrial-grade reliability.

Availability

LM393PWRG4 is available at Aetrix Electronics and suitable for power supply monitoring, motor control feedback, and industrial sensor interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for LM393PWRG4 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, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

LM393PWRG4 belongs to TI's precision comparator product line, engineered for robust single-supply operation in cost-sensitive industrial control, power management, and appliance safety systems.

FAQ

What is the absolute maximum supply voltage for LM393PWRG4?

The absolute maximum supply voltage for LM393PWRG4 is 38 V, as specified in the Absolute Maximum Ratings table. This 2 V headroom above the 36 V recommended maximum enables safe operation during transient overvoltage events in 24 V industrial systems. Exceeding 38 V risks permanent device damage, regardless of duration.

Does LM393PWRG4 require dual power supplies?

No, LM393PWRG4 operates from a single supply ranging from 2 V to 36 V. Its input common-mode range includes ground, and outputs are open-collector - eliminating need for negative rails. This simplifies design in battery-powered or 24 V PLC applications where generating a split supply is impractical or costly.

Can LM393PWRG4 drive a 5 V logic input directly?

Yes, LM393PWRG4 can drive a 5 V logic input when configured with a 5 V pull-up resistor on the output. Its open-collector output sinks up to 25 mA, ensuring clean LOW-level assertion. For HIGH-level compatibility, the pull-up must connect to the target logic's VCC (e.g., 5 V), as the comparator itself does not source current.

What is the input offset voltage specification for LM393PWRG4 over temperature?

The input offset voltage for LM393PWRG4 is guaranteed at ±4 mV over the full operating temperature range of –40°C to +85°C. At 25°C, typical offset is ±0.37 mV. This tight spec ensures reliable threshold detection in precision applications like battery voltage monitoring or sensor zero-point calibration.

Is LM393PWRG4 pin-compatible with older LM393 variants?

Yes, LM393PWRG4 is a drop-in replacement for LM393, LM293, and LM2903 in SOIC-8 packages. Pin assignments, electrical behavior, and footprint match exactly. The "B" version improves offset voltage, supply current, ESD rating, and voltage range - all while maintaining backward compatibility for design upgrades without PCB revision.