LM393PW

Overview

The LM393PW is a dual differential voltage comparator manufactured by Texas Instruments, designed for operation from a single power supply over a wide voltage range. It features two independent comparators with open-collector outputs compatible with TTL, MOS, and CMOS logic families. The device operates within a supply voltage range of 2 V to 36 V (single) or ±1 V to ±18 V (dual). Key electrical specifications include a maximum input offset voltage of 5 mV at 30 V, an input bias current of 50 nA, and a typical response time of 1.3 µs. The quiescent supply current is 2.5 mA. It is housed in an 8-TSSOP package and supports an operating temperature range of 0°C to +70°C.

Feature Summary

• Dual independent differential voltage comparators optimized for single-supply operation across a wide voltage spectrum.
• Open-collector output configuration allows compatibility with various logic families including TTL, MOS, and CMOS.
• Low input offset voltage and low input bias current ensure precise signal comparison capabilities.
• Common-mode input voltage range includes ground, facilitating direct interfacing with sensors and other components.

Applications

• Vacuum robot control systems
• Single phase uninterruptible power supply (UPS)
• Server power supply unit monitoring

Procurement Notes

Verify the specific suffix against the manufacturer's latest datasheet to confirm package type and temperature grade. Ensure the ordering part number matches the required RoHS compliance status and moisture sensitivity level. Cross-reference the component marking with official documentation to distinguish between standard and B-version variants if applicable.

Selection Notes

Select this component when dual-channel voltage comparison is required with open-collector outputs. It is suitable for applications needing wide supply voltage flexibility and ground-referenced common-mode inputs. Consider the 1.3 µs response time for speed requirements and the TSSOP-8 package for surface-mount assembly constraints.

Part Context

The LM393 is part of the industry-standard LMx93/LM2903 family of dual comparators. This series is widely used in general-purpose analog circuits where reliable threshold detection is necessary. The PW suffix indicates the 8-TSSOP surface-mount package variant, distinguishing it from through-hole or other plastic packages like SOIC or DIP.

Replacement Considerations

LM393B and LM2903B are documented as drop-in replacements offering improved specifications such as lower offset voltage and higher ESD ratings. Other family members like LM2903 may serve as functional equivalents depending on specific pinout and performance requirements.