TS861AIN

Overview

The TS861AIN is a single-channel rail-to-rail micropower BiCMOS comparator manufactured by STMicroelectronics. It operates within a supply voltage range of 2.7 V to 10 V and supports temperatures from -40 °C to +85 °C. Key electrical parameters include a maximum input bias current of 300 pA at 5 V, a typical CMRR of 70 dB, and a maximum propagation delay of 2 µs. The device features push-pull outputs and consumes a maximum static current of 16 µA. It is housed in an 8-DIP package with a width of 0.300 inches (7.62 mm) for through-hole mounting.

Feature Summary

• Rail-to-rail CMOS inputs allow signal processing across the full supply voltage range.
• Push-pull output stage enables direct connection to microcontrollers without external pull-up resistors.
• Ultra-low power consumption design ensures efficient operation in battery-powered systems.

Applications

• Battery-powered portable electronic devices
• Direct interfacing with microcontroller logic inputs
• General-purpose analog signal comparison

Procurement Notes

Verify component authenticity as the TS861AIN is listed as obsolete or discontinued by the manufacturer. Confirm availability through authorized distributors or secondary market suppliers. Ensure the specific 8-DIP package variant matches the required footprint. Check RoHS compliance status for environmental regulations. Validate datasheet revisions to ensure parameter consistency with design requirements.

Selection Notes

Select this component when a single comparator with rail-to-rail input capability is required in a through-hole DIP package. The low quiescent current makes it suitable for energy-constrained applications. Consider alternative packages like SOT-23-5 if board space is limited, as other variants exist within the TS86x family. Verify that the 2 µs propagation delay meets the system timing specifications.

Part Context

The TS861AIN belongs to the TS86x family of rail-to-rail micropower comparators, which includes dual (TS862) and quad (TS864) configurations. This family shares common characteristics such as BiCMOS technology, low power consumption, and rail-to-rail performance. The TS861 specifically provides a single channel in an 8-pin DIP package, distinguishing it from surface-mount variants like the TS861AILT.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the TS861AIN is marked as obsolete, engineers should evaluate active alternatives within the same product family, such as the TS861AILT (SOT-23-5), ensuring pinout compatibility and electrical parameter alignment before substitution.