TS861AIDT

Overview

The TS861AIDT is a single-channel analog comparator manufactured by STMicroelectronics, utilizing rail-to-rail micropower BiCMOS technology. It operates within a supply voltage range of 2.7 V to 10 V and consumes only 6 µA of quiescent current per channel at the minimum voltage. The device features push-pull outputs capable of sourcing or sinking 5 mA, with a propagation delay of 2 µs. Input characteristics include a maximum input offset voltage of 7 mV and an input bias current of 300 pA. It is housed in an SOIC-8 surface-mount package and supports an operating temperature range from -40 °C to +85 °C.

Feature Summary

• Rail-to-rail CMOS inputs allow for full common-mode voltage range operation across the entire supply span.
• Micropower BiCMOS architecture ensures ultra-low current consumption suitable for battery-powered applications.
• Push-pull output stage provides strong drive capability without requiring external pull-up resistors.

Applications

• Battery-powered portable devices requiring low standby current
• Threshold detection circuits in consumer electronics
• Signal conditioning in industrial monitoring systems

Procurement Notes

Verify the specific ordering suffix and package variant against the manufacturer's official datasheet before procurement. Confirm RoHS compliance status and ensure the component meets the required operating temperature range for the intended application environment. Cross-reference the manufacturer part number with authorized distributor listings to avoid counterfeit components.

Selection Notes

Select this component when a single comparator with rail-to-rail input capability and minimal power consumption is required. The push-pull output simplifies interface design compared to open-collector alternatives. Consider the SOIC-8 package dimensions for PCB layout constraints and verify that the 2 µs propagation delay meets the timing requirements of the target signal processing speed.

Part Context

This component belongs to the TS861 family of rail-to-rail micropower comparators. The family includes variants with different pin counts and packages, such as the TS862 (dual) and TS864 (quad). The TS861AIDT specifically denotes the single-channel version in an SOIC-8 surface-mount package, offering a compact solution for space-constrained designs while maintaining high performance.

Replacement Considerations

Check for direct pin-compatible substitutes within the same product family, such as other TS861 variants with different packaging options. Verify that any alternative component maintains the same supply voltage range, current consumption, and electrical characteristics to ensure circuit compatibility without redesign.

FAQ

Does the TS861AIDT require external pull-up resistors?

No, the TS861AIDT features a push-pull output stage, which eliminates the need for external pull-up resistors typically required with open-collector comparators.

What is the maximum input bias current for this device?

The maximum input bias current is specified as 300 pA at 5 V, contributing to its micropower classification.