TS864AID

Overview

The TS864AID is a quad rail-to-rail micropower BiCMOS comparator from STMicroelectronics, designed for operation with supply voltages ranging from 2.7 V to 10 V across an industrial temperature range of -40 °C to +85 °C. It features four independent channels in a 14-SOIC package, delivering ultra-low current consumption of 6 μA per comparator at 2.7 V and a typical propagation delay of 1.5 μs. The device incorporates push-pull outputs capable of sourcing or sinking up to 5 mA, eliminating the need for external pull-up resistors when interfacing directly with microcontrollers.

Feature Summary

• Rail-to-rail CMOS inputs enable full common-mode voltage range utilization
• Push-pull output stage allows direct connection to digital logic without pull-up resistors
• Ultra-low power consumption optimized for battery-powered applications
• Integrated ESD protection and latch-up immunity for robust operation

Applications

• Battery-powered portable systems requiring low quiescent current
• Microcontroller interface circuits for signal conditioning
• Window comparator configurations for voltage monitoring
• Industrial sensor signal processing

Procurement Notes

Verify the specific suffix (e.g., IDT vs AIDT) against the manufacturer datasheet to confirm exact electrical parameters such as input offset voltage and propagation delay. Confirm package availability and RoHS compliance status prior to ordering. Ensure the selected variant matches the required operating temperature range and output drive specifications for the target application design.

Selection Notes

Select this component when designing low-power analog front-ends that require high input impedance and rail-to-rail compatibility. The push-pull output simplifies PCB layout by removing external components typically needed for open-collector comparators. Consider the trade-off between the 6 μA static current and the 1.5 μs response time for speed-sensitive applications.

Part Context

The TS864 belongs to the TS86x family, which includes single (TS861), dual (TS862), and quad (TS864) variants. This family shares identical core architecture and electrical characteristics, differing primarily in channel count and package options such as SOT23-5, SO-8, SO-14, TSSOP8, and TSSOP14. The TS864 specifically provides four comparators in a compact 14-pin surface-mount package.

Replacement Considerations

Check for pin-compatible alternatives within the same TS86x family, such as TS864IDT, noting potential differences in offset voltage or delay specifications. Verify if newer generation comparators offer improved speed or lower power while maintaining the 14-SOIC footprint and push-pull output configuration.