LM393PT

Overview

The LM393PT is a low-power dual voltage comparator designed to operate from a single power supply over a wide range of voltages. It features an open-collector output stage that is compatible with TTL, DTL, ECL, MOS, and CMOS logic levels. This specific variant is provided by STMicroelectronics in a thin shrink small outline package (TSSOP-8) for space-constrained designs.

Why Choose This Part

The LM393PT offers a very low supply current drain of approximately 0.4mA, which is nearly independent of the supply voltage. Its wide input common-mode range includes ground, allowing for direct sensing near 0V even when operating from a single supply. The TSSOP-8 packaging provides a smaller footprint than standard SOIC-8 while maintaining high reliability.

Applications

Getting Started

When designing with the LM393PT, remember to include an external pull-up resistor on the output since it is an open-collector architecture. Ensure that the common-mode input voltage does not exceed the maximum rating, typically 1.5V below the positive supply rail. For prototyping, the TSSOP-8 package requires an adapter board if used with standard 0.1-inch breadboards.

LM393 Family

Comparing specs that differ across variants. The current part is highlighted.