LM193AYDT

Overview

The LM193AYDT is a low-power dual voltage comparator manufactured by STMicroelectronics. It consists of two independent comparators designed for single-supply operation over a wide voltage range, with split supply capability also supported. The input common-mode voltage range includes ground even when operated from a single power supply. Key electrical characteristics include a wide single-supply voltage range of 2 V to 36 V or dual supplies of ±1 V to ±18 V. Supply current is very low at 0.45 mA, independent of supply voltage, resulting in 1 mW consumption per comparator at 5 V. Typical input bias current is 20 nA, input offset current is ±3 nA, and input offset voltage is ±1 mV. Output saturation voltage is typically 80 mV at an I sink of 4 mA.

Feature Summary

• Dual independent low-voltage comparators optimized for single-supply operation
• Input common-mode voltage range extends to ground potential
• Low supply current consumption independent of operating voltage
• Outputs compatible with TTL, DTL, ECL, MOS, and CMOS logic families

Applications

• Battery-powered systems requiring low quiescent current
• Voltage monitoring circuits
• Threshold detection applications
• Signal conditioning interfaces

Procurement Notes

Verify the specific suffix 'AYDT' against official STMicroelectronics documentation to confirm package type (typically SO-8) and temperature grade. Ensure compatibility with required PCB footprint and soldering profiles. Cross-reference ordering codes with authorized distributors to avoid counterfeit components. Confirm RoHS compliance status as indicated in the latest datasheet revision.

Selection Notes

Select this component when dual comparators are needed with minimal power consumption. It is suitable for applications where the input signal can swing to ground level. Consider the open-collector output nature which requires external pull-up resistors. Evaluate if the standard offset voltage meets system accuracy requirements compared to precision variants like the LM393A.

Part Context

The LM193 belongs to a family of low-power dual voltage comparators that includes the LM293 and LM393. These devices share similar functional architectures but may differ in temperature ranges, offset voltage specifications, or packaging options. The LM193 specifically targets general-purpose applications requiring reliable comparison with low energy usage.

Replacement Considerations

Compatible substitutes include the LM393 series, though performance parameters such as offset voltage and speed may vary. Verify pinout compatibility and electrical specifications before substitution. Other manufacturers offer equivalent parts, but ensure interface and timing characteristics match the original design constraints.