STMicroelectronics TS864AID

Overview

TS864AID from STMicroelectronics is a quad rail-to-rail micropower BiCMOS comparator operating from 2.7 V to 10 V, consuming only 6 µA per comparator at 2.7 V, featuring push-pull outputs, 500 ns propagation delay at 100 mV overdrive, and ±12 V differential input voltage rating. It is used in battery-powered smoke detectors where ultra-low quiescent current and direct microcontroller interfacing are critical.

For engineers reviewing the TS864AID datasheet, TS864AID pinout, TS864AID application, or TS864AID equivalent, key selection considerations include its rail-to-rail CMOS inputs, latch-up immunity (Class A), ESD protection (2 kV HBM), -40 °C to +85 °C industrial temperature range, and availability in SO-14 package with no external pull-up resistors required.

Technical Context

The TS864AID implements four independent comparators in a single SO-14 package, each with rail-to-rail CMOS input stage enabling full-supply-range common-mode operation (VCC−0.3 V to VCC+0.3 V) and push-pull output stage eliminating need for external pull-up resistors. Its BiCMOS process delivers 6 µA supply current per comparator at 2.7 V while maintaining 240 dB large-signal voltage gain and 75 dB common-mode rejection at 10 V supply.

Propagation delay is optimized across supply voltage: 0.4 µs (TPHL) and 0.5 µs (TPLH) at 5 V with 100 mV overdrive and 50 pF load; input offset voltage is tightly specified at 3–10 mV (max) over temperature, with 6 µV/°C drift, supporting precision threshold detection in portable systems.

Key Specifications

Pinout & Package

TS864AID is housed in a 14-lead SOIC (SO-14) package with standard 1.27 mm pitch, 8.55–8.75 mm body width, and 5.80–6.20 mm body length. Thermal resistance junction-to-ambient is 105 °C/W, suitable for passive cooling in compact enclosures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad rail-to-rail micropower comparator applications.

Compared with LM339DR and TLV3704IPW, TS864AID uniquely balances micropower operation (6 µA), fast propagation (0.4–0.5 µs), push-pull interfacing, and SO-14 pin compatibility-making it optimal for space- and energy-constrained safety-critical systems requiring zero external components.

Availability

TS864AID is available at Aetrix Electronics and suitable for battery-powered smoke detectors, portable gas analyzers, fire alarm control panels, and battery voltage monitors requiring stable component supply across extended production lifecycles.

Supply support for TS864AID includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The TS86x family was developed specifically for ultra-low-power, high-reliability analog sensing in battery-operated safety and environmental monitoring systems, emphasizing rail-to-rail performance, latch-up immunity, and robust ESD tolerance.

FAQ

What is the maximum operating temperature range for TS864AID?

The TS864AID is rated for continuous operation from -40 °C to +85 °C ambient temperature, validated across all electrical parameters in Table 2 of the official datasheet (Doc ID 6422 Rev 3). Junction temperature must not exceed 150 °C, and thermal resistance junction-to-ambient is 105 °C/W in SO-14 package.

Does TS864AID require external pull-up resistors on its outputs?

No. TS864AID features push-pull CMOS outputs capable of sourcing and sinking up to 5 mA at 5 V, enabling direct connection to microcontroller GPIO pins without external pull-up resistors. This eliminates standby current paths and reduces component count in battery-powered designs.

Can TS864AID operate from a 1.8 V supply?

No. The absolute minimum supply voltage is 2.7 V per Table 1 (Absolute Maximum Ratings) and Table 2 (Operating Conditions). Operation below 2.7 V is not characterized or guaranteed; input common-mode range and output swing degrade outside the 2.7–10 V specification.

Is TS864AID pin-compatible with TS864ID?

Yes. TS864AID and TS864ID share identical SO-14 pinout, electrical specifications, and thermal characteristics. The "A" suffix denotes improved input offset voltage (3–10 mV vs. 3–15 mV for non-A grade), but mechanical and functional compatibility is maintained across both variants.