TSM9120ESA+T

Overview

The TSM9120ESA+T is a nanopower analog comparator manufactured by Silicon Labs, operating on a single supply voltage ranging from 1.6V to 5.5V. It features an open-drain output stage and draws a typical supply current of 350nA at 1.6V. The device includes internal hysteresis of 4mV and guarantees input voltage operation extending 200mV beyond the power supply rails without phase reversal. Propagation delay is typically 16µs at 1.6V and 45µs at 5V with a 100kΩ pullup resistor.

Feature Summary

• Ultra-low supply current consumption suitable for battery-powered applications
• Robust input stage tolerates voltages 200mV outside the supply rails
• Internal 4mV hysteresis ensures clean switching behavior
• Open-drain output allows flexible logic level translation

Applications

• Two-cell battery monitoring and management systems
• Medical instruments requiring low-power threshold detection
• Logic-level translation between different voltage domains
• Zero-crossing detectors in telemetry and remote systems

Procurement Notes

Verify component authenticity through authorized distributors as this part may be subject to obsolescence notices. Confirm package integrity upon receipt, as moisture sensitivity levels require proper handling. Cross-reference datasheet revisions to ensure compatibility with existing designs, noting that manufacturing sources may have changed over time.

Selection Notes

Select this model when an open-drain output is required for wired-OR configurations or interfacing with higher voltage logic systems. It is ideal for designs prioritizing minimal quiescent current draw below 1µA. Ensure external pullup resistors are sized appropriately to meet propagation delay requirements, as the open-drain architecture relies on them for high-state output levels.

Part Context

This component belongs to the TSM9117-TSM9120 family of nanopower comparators. It serves as a second-source equivalent to the Maxim Integrated MAX9120 series. The family shares identical electrical characteristics and form factors, offering both push-pull and open-drain variants with or without integrated voltage references.

Replacement Considerations

The TSM9120ESA+T is electrically and form-factor identical to the MAX9120ESA+. Designers can substitute one for the other without circuit modifications. Verify that the replacement source meets the same absolute maximum ratings and operating temperature ranges specified in the original documentation.