TS861AILT

Overview

The TS861AILT is a single-channel rail-to-rail micropower comparator manufactured by STMicroelectronics. It operates within a supply voltage range of 2.7 V to 10 V and functions across an industrial temperature range of -40°C to +85°C. Key electrical specifications include a maximum input offset voltage of 7 mV at 5 V, a typical common-mode rejection ratio (CMRR) of 70 dB, and a maximum propagation delay of 2 µs. The device draws a maximum static current of 16 µA and features push-pull outputs capable of sourcing or sinking up to 5 mA. It is housed in a compact SOT-23-5 surface-mount package.

Feature Summary

• Rail-to-rail CMOS inputs allow signal processing near both supply rails
• Push-pull output stage enables direct microcontroller interfacing without external pull-up resistors
• Ultra-low power consumption suitable for battery-powered systems
• Integrated ESD protection and latch-up immunity

Applications

• Battery-powered portable devices
• Threshold detection circuits
• Voltage monitoring systems
• Microcontroller interface logic levels

Procurement Notes

Verify the specific suffix 'AILT' corresponds to the SOT-23-5 package and tape-and-reel quantity when ordering. Confirm RoHS compliance status matches current manufacturing standards. Ensure the operating environment remains within the specified -40°C to +85°C range to maintain guaranteed performance parameters. Cross-reference datasheet revision dates with procurement documents to ensure design compatibility.

Selection Notes

Select this component when low quiescent current is critical alongside rail-to-rail input capability. The push-pull output simplifies circuit design by eliminating the need for external pull-up components. Consider the SOT-23-5 package constraints for PCB space limitations. Verify that the 2 µs propagation delay meets the timing requirements of the target application compared to faster alternatives.

Part Context

This part belongs to the TS86x family of rail-to-rail micropower BiCMOS comparators, which includes dual (TS862) and quad (TS864) variants. The family shares identical electrical characteristics and pinouts where applicable, allowing for scalable design architectures. The TS861 specifically provides a single comparator channel optimized for minimal power usage in compact form factors.

Replacement Considerations

Direct functional substitutes within the same family include the TS862 and TS864, provided additional channels are acceptable. Verify pinout compatibility if replacing with other single-channel comparators from different manufacturers. Ensure equivalent supply voltage ranges and output drive capabilities match the existing circuit design requirements.