TS7221AI1LT

Overview

The TS7221AI1LT is a single-channel analog comparator manufactured by STMicroelectronics, utilizing BiCMOS technology. It operates within a supply voltage range of 2.7V to 10V and features an open-drain output capable of sourcing up to 30mA. Key electrical specifications include a maximum input offset voltage of 7mV at 5V, a typical propagation delay of 500ns, and a quiescent current of 6µA. The device offers high common-mode rejection (70dB) and power supply rejection (80dB), with an operating temperature range from -40°C to +105°C.

Feature Summary

• Rail-to-rail input capability for wide dynamic range signal detection
• Low power consumption suitable for battery-operated applications
• Open-drain output allows flexible interfacing with various logic families

Applications

• Battery-powered portable devices requiring low standby current
• Threshold detection circuits in industrial monitoring systems
• Voltage level shifting between different logic domains

Procurement Notes

Verify the specific suffix 'I' indicates the extended industrial temperature range (-40°C to +105°C). Confirm the package marking matches SOT-23-5 standards. Ensure compatibility with RoHS3 directives if required by your manufacturing process. Cross-reference the datasheet revision date to confirm parameter stability before finalizing design-in decisions.

Selection Notes

Select this component when rail-to-rail input performance is critical alongside ultra-low power requirements. The open-drain output necessitates an external pull-up resistor; ensure the chosen resistor value supports the desired switching speed and logic levels. Compare against standard CMOS comparators if higher speed or push-pull outputs are needed instead of the micropower focus provided here.

Part Context

This part belongs to the TS7221 series of micropower comparators. It shares core architectural similarities with variants like the TS7221BILT but differs primarily in the specified operating temperature range. The series is designed for general-purpose applications where power efficiency and input voltage swing limitations of traditional comparators must be overcome.

Replacement Considerations

Direct pin-compatible substitutes may include other single-channel rail-to-rail comparators from manufacturers such as Texas Instruments or Analog Devices. Verify that replacement parts match the 2.7V minimum supply voltage and 30mA output drive capability. Check if the alternative device requires a pull-up resistor similar to the open-drain configuration.