LM393SNG

Overview

The LM393SNG is a dual independent precision voltage comparator integrated circuit manufactured by onsemi. It operates from a single power supply ranging from 2.0 Vdc to 36 Vdc or split supplies of ±1.0 Vdc to ±18 Vdc. The device features very low current drain, typically 0.4 mA, which remains independent of the supply voltage magnitude. Input offset voltage specifications are as low as 2.0 mV maximum. The input common-mode voltage range includes ground level, allowing sensing near ground even with single-supply operation. The differential input voltage range equals the power supply voltage.

Feature Summary

• Dual independent precision voltage comparators designed for single or split supply operation
• Input common-mode voltage range includes ground level for near-ground sensing
• Output voltage compatible with DTL, ECL, TTL, MOS, and CMOS logic levels
• Very low supply current drain that is independent of the supply voltage magnitude

Applications

• Limit comparators
• Simple analog to digital converters
• Pulse, squarewave, and time delay generators
• Wide range voltage controlled oscillators (VCO)
• MOS clock timers and multivibrators

Procurement Notes

Verify the specific suffix 'SNG' against the official onsemi datasheet to confirm package type, tape-and-reel specifications, and RoHS compliance status. Ensure the ordering part number matches the exact temperature grade and packaging format required for the design. Cross-reference with the manufacturer's latest documentation to confirm availability and any potential obsolescence notices before finalizing procurement.

Selection Notes

Select this component when high precision is required with low power consumption in single-supply systems. The inclusion of ground-level common-mode input range makes it suitable for applications requiring signal sensing near zero volts. The open-collector output allows flexible interfacing with various logic families without additional level shifting components, provided an external pull-up resistor is utilized.

Part Context

The LM393 series consists of two independent precision voltage comparators. It is designed specifically to operate from a single power supply over a wide range of voltages, though split supply operation is also supported. The low power supply current drain is independent of the magnitude of the power supply voltage. This device eliminates the need for dual supplies in many applications while maintaining high accuracy.

Replacement Considerations

LM2903: Industrial temperature grade version. LM193: Military temperature grade version. LM393N: DIP-8 package variant.