Texas Instruments LM393APWRE4

Overview

LM393APWRE4 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, and 1 µs propagation delay. It serves as a signal-level decision element in power supply monitoring, motor control feedback, and industrial sensor interface circuits.

For engineers reviewing the LM393APWRE4 datasheet, LM393APWRE4 pinout, LM393APWRE4 application, or LM393APWRE4 equivalent, this page delivers verified electrical specifications, package-validated pin functions, real-world use-case implementation context, and two confirmed alternative parts with documented functional and thermal differences.

Technical Context

The LM393APWRE4 implements open-collector output architecture compatible with TTL, MOS, and CMOS logic families, enabling flexible pull-up configuration. Its input stage supports common-mode voltage range extending to ground and differential input voltage up to ±38 V, allowing direct sensing of signals referenced to system ground or floating sources.

Designed for robust operation in noisy industrial environments, the device integrates dedicated ESD clamps delivering 2 kV HBM rating and maintains stable performance over −40°C to +85°C ambient temperature, with input bias current as low as 3.5 nA and output saturation voltage below 400 mV at 4 mA sink load.

Key Specifications

Pinout & Package

TSSOP-8 package (3.00 mm × 4.40 mm body size) with exposed thermal pad connected to GND for enhanced thermal dissipation in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393APWRE4, LM393BDR improves offset and ruggedness for harsh environments, while TLV3702IDR trades output strength for femtoampere input leakage-making each optimal for distinct analog sensing priorities.

Availability

LM393APWRE4 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 traceable sourcing.

Supply support for LM393APWRE4 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 specializing in analog and embedded processing technologies, with decades of experience in precision signal conditioning and industrial-grade IC design.

The LM393x family was developed to deliver robust, cost-effective dual comparators for industrial automation, power management, and safety-critical monitoring systems where reliability and wide operating margins are essential.

FAQ

What is the maximum supply voltage rating for LM393APWRE4?

The LM393APWRE4 supports a maximum supply voltage of 36 V, verified per Absolute Maximum Ratings in the official Texas Instruments datasheet SLCS005AH. This rating applies across its full operating temperature range (−40°C to +85°C) and exceeds legacy LM393 versions limited to 30 V, enabling direct use in 24 V industrial control systems without derating.

Does LM393APWRE4 support ground-referenced input signals?

Yes, LM393APWRE4 supports common-mode input voltages that include ground (0 V), as confirmed in Section 5.5 of the datasheet. Its input stage allows either or both inputs to reach VCC without damage, and the valid common-mode range extends from ground to (VCC − 2 V), making it suitable for direct interface with shunt-based current sensing and grounded thermistor networks.

What is the typical input offset voltage of LM393APWRE4 and how does it affect precision applications?

The LM393APWRE4 has a typical input offset voltage of ±0.37 mV, with a maximum of ±4 mV over temperature. This specification directly determines minimum detectable voltage difference between inputs-enabling reliable threshold detection down to ~1 mV in room-temperature applications such as battery cell voltage monitoring or precision level shifting.

Can LM393APWRE4 drive an LED directly without a current-limiting transistor?

Yes, LM393APWRE4 can drive an LED directly when configured with appropriate pull-up and series resistance. With 21 mA sink capability at 1.5 V output saturation, it supports standard 2 mA to 10 mA indicator LEDs using a 470 Ω to 2.2 kΩ pull-up resistor to 3.3 V or 5 V, eliminating need for discrete buffer transistors in status-indication circuits.

Is LM393APWRE4 pin-compatible with older LM393 variants?

Yes, LM393APWRE4 uses the TSSOP-8 package and matches the pinout of standard LM393 devices in SOIC, VSSOP, and TSSOP packages as shown in Figure 4-1 of the datasheet. Pin assignments for 1OUT, 1IN−, 1IN+, GND, 2IN+, 2IN−, 2OUT, and VCC are identical-enabling drop-in replacement in existing layouts without redesign.