Texas Instruments LM393PWRG3

Overview

LM393PWRG3 from Texas Instruments is a dual precision voltage comparator in an 8-pin TSSOP package, designed for single-supply operation from 2 V to 36 V. It delivers ±0.37 mV typical input offset voltage, 200 µA per comparator quiescent current, 1 µs propagation delay, and rail-to-rail input common-mode range including ground-enabling robust level detection in industrial power supplies and motor control feedback loops.

For engineers reviewing the LM393PWRG3 datasheet, LM393PWRG3 pinout, LM393PWRG3 application, or LM393PWRG3 equivalent, key selection criteria include its B-version enhanced ESD rating (2 kV HBM), extended supply voltage headroom (up to 36 V), low input bias current (3.5 nA), compatibility with TTL/MOS/CMOS logic outputs, and drop-in replacement capability for legacy LM393 and LM2903 designs.

Technical Context

The LM393PWRG3 implements two independent open-collector comparators with dedicated ESD clamps, enabling reliable operation under transient stress. Its input stage supports differential voltages up to ±38 V and common-mode inputs down to −0.1 V (with respect to V−), while maintaining stable performance across −40°C to +85°C ambient temperature.

Propagation delay is specified at 1 µs under TTL-level input steps with 5.1 kΩ pull-up and 15 pF load, and output saturation voltage remains ≤400 mV at 4 mA sink current-ensuring clean logic-level transitions into standard digital interfaces without external level-shifting.

Key Specifications

Pinout & Package

LM393PWRG3 uses an 8-pin TSSOP package (3.00 mm × 4.40 mm body) with exposed thermal pad connected to GND for improved thermal dissipation in compact layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR and LM2903PWR, the LM393PWRG3 offers optimal balance of miniaturization (TSSOP), commercial-temperature performance, and drop-in compatibility-making it ideal for space-constrained server PSU and cordless tool PCBs where +85°C max ambient is sufficient.

Availability

LM393PWRG3 is available at Aetrix Electronics and suitable for server power supply monitoring, industrial motor drive feedback, and building automation sensor interface requiring stable component supply and long-term design-in support.

Supply support for LM393PWRG3 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 LM393B family-including LM393PWRG3-is engineered for high-reliability voltage comparison in power management, motor control, and sensor signal conditioning systems where precision, speed, and ruggedness are critical.

FAQ

What is the maximum supply voltage rating for LM393PWRG3?

The LM393PWRG3 has an absolute maximum supply voltage of 38 V, with recommended operation up to 36 V. This extended headroom allows direct integration into 24 V and 36 V industrial power rails without pre-regulation, unlike legacy LM393 variants rated only to 30 V.

Does LM393PWRG3 require external hysteresis for stable switching?

LM393PWRG3 does not include internal hysteresis; external positive feedback is required for noise immunity in slow-moving or noisy input signals. Typical implementation uses a resistor divider from output to non-inverting input-design value depends on desired threshold delta (e.g., 10–50 mV), and LM393PWRG3's low input bias current (3.5 nA) ensures minimal error.

Can LM393PWRG3 drive a 5 V logic input directly?

Yes-LM393PWRG3's open-collector output can sink up to 21 mA and is compatible with 5 V TTL/CMOS logic when pulled up to 5 V. Its low-level output voltage stays ≤400 mV at 4 mA sink current, satisfying VIH(min) = 2.0 V and VIL(max) = 0.8 V requirements for standard 5 V digital inputs.

Is LM393PWRG3 pin-compatible with older LM393 variants?

Yes-LM393PWRG3 is a B-version drop-in replacement for LM393, LM293, and LM2903 in TSSOP-8. Pin functions, electrical behavior, and layout footprint match exactly; only performance improvements (lower offset, faster response, higher ESD) are upgraded-no schematic or PCB changes are needed when migrating to LM393PWRG3.

What is the operating temperature range of LM393PWRG3?

The LM393PWRG3 is specified for operation from −40°C to +85°C ambient temperature. This commercial-grade range aligns with the LM393B variant designation and supports deployment in server PSUs, factory automation controllers, and cordless power tools-environments where extended industrial grade (−40°C to +125°C) is not required.