TS391AILT

Overview

The TS391AILT is a low-power, single voltage comparator from STMicroelectronics designed for operation from a single supply over a wide voltage range. It features an input common-mode voltage range that includes ground, even when operated from a single power supply. The device offers very low supply current of 0.2 mA, independent of the supply voltage, resulting in 1 mW consumption per comparator at 5 V. Key electrical characteristics include a low input bias current of 25 nA typical, low input offset current of ± 5 nA typical, and a maximum input offset voltage of ± 2 mV for the TS391A variant. The output saturation voltage is typically 250 mV at an output current of 4 mA.

Feature Summary

• Designed for low-power operation with supply current independent of voltage
• Input common-mode voltage range extends to ground on single supplies
• Outputs compatible with TTL, DTL, ECL, and CMOS logic families

Applications

• Signal conditioning circuits
• Threshold detection systems
• Logic level shifting

Procurement Notes

Verify the specific suffix 'AILT' against the manufacturer's official datasheet to confirm package type and temperature grade. Ensure the ordering code matches the exact pinout and electrical specifications required for the design. Cross-reference the component marking with the official documentation to prevent substitution errors during assembly.

Selection Notes

Select this component when a single-supply comparator with ground-referenced input capability is required. The low power consumption makes it suitable for battery-operated devices. Verify that the input offset voltage of ± 2 mV meets the precision requirements of the application compared to other variants in the series.

Part Context

The TS391AILT belongs to the TS391 family of low-power voltage comparators manufactured by STMicroelectronics. This family is engineered for applications requiring minimal power consumption while maintaining compatibility with standard digital logic levels. The device is part of a broader portfolio of signal conditioning components offered by the manufacturer.

Replacement Considerations

Consult the official datasheet for direct pin-to-pin replacements within the TS391 series. Verify that any substitute component maintains the same single-supply operation and ground-inclusive input range. Ensure the replacement meets the specific offset voltage and current specifications of the original design.