TSM9118EXK+T

Overview

The TSM9118EXK+T is a nanopower analog comparator from the TSM9117-TSM9120 family, manufactured by Silicon Labs. It features an open-drain output and includes an internal 1.252V ±1.75% voltage reference. The device guarantees operation down to +1.6V with a typical supply current of 600nA at +1.6V. Input voltages extend 200mV outside the rails without phase reversal. It offers 4mV internal hysteresis for clean switching and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Includes an on-board 1.252V voltage reference
• Open-drain output stage for flexible logic interfacing
• Robust input stage tolerates voltages beyond supply rails
• Internal hysteresis prevents oscillation during switching

Applications

• Two-cell battery monitoring and management systems
• Medical instruments requiring low power consumption
• Threshold detectors and discriminators
• Sensing applications at ground or supply lines
• Ultra-low-power mobile communications devices

Procurement Notes

Verify component authenticity through authorized channels as this part may be subject to obsolescence notices. Confirm package integrity upon receipt, specifically checking for SC-70-5 tape and reel condition. Ensure compatibility with existing PCB footprints and verify that the open-drain configuration meets system pull-up requirements before final integration.

Selection Notes

Select this model when an integrated voltage reference is required alongside low power consumption. The open-drain output allows connection to supply voltages higher than VCC, facilitating level shifting between different logic domains. Compare against TSM9117 if push-pull output is preferred, or TSM9119 if the internal reference is unnecessary to minimize current draw further.

Part Context

This component belongs to the TSM911x series of nanopower comparators, which are electrically and form-factor identical to the MAX9117-MAX9120 family. The series provides options for both push-pull and open-drain outputs with or without internal references, all packaged in compact 5-pin SC70 or 8-pin SOIC formats designed for space-constrained portable electronics.

Replacement Considerations

The datasheet identifies the TSM9118EXK+T as a second-source equivalent to the Maxim Integrated MAX9118. Verify pinout and electrical specifications match exactly before substitution. Other family members like TSM9117 (push-pull) or TSM9119 (no reference) share the same package but differ in output type or internal features.