STMicroelectronics TS339IDT

Overview

TS339IDT from STMicroelectronics is a micropower quad CMOS voltage comparator operating from 2.7 V to 16 V single supply (or ±1.35 V to ±8 V dual), delivering 9 μA typical supply current per comparator, 1 pA typical input bias current, and 1.5 μs typical response time with 5 mV overdrive - used in battery-powered sensor monitoring and precision threshold detection circuits.

For engineers reviewing the TS339IDT datasheet, TS339IDT pinout, TS339IDT application, or TS339IDT equivalent, key selection criteria include rail-to-rail input common-mode range (0 V to V_CC–1.2 V), low-offset performance (6.5 mV max at 25 °C), push-pull-compatible output stage, and industrial temperature support (–40 °C to +125 °C).

Technical Context

The TS339IDT implements four independent CMOS comparators with high-impedance inputs (10¹² Ω typ.), enabling direct interfacing with high-source-impedance sensors without loading. Its input common-mode range includes ground, supporting single-supply operation in systems where reference voltages sit near 0 V.

Each comparator features open-drain outputs compatible with standard TTL/CMOS logic levels and pull-up configurations, while maintaining fast propagation (t_PLH/t_PHL ≤ 2.5 μs) across full temperature range and supply voltage. The device is functionally and pin-to-pin compatible with the bipolar LM339 but consumes ~20× less quiescent current.

Key Specifications

Pinout & Package

TS339IDT is supplied in SO14 (plastic small outline) package, 14-lead, 3.9 mm body width, 1.27 mm pitch, RoHS-compliant and ECOPACK® certified.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad voltage comparator applications.

Compared with LM339DR and TS3704CDT, TS339IDT uniquely balances ultra-low power, GND-referenced input capability, and open-drain flexibility - making it optimal for energy-constrained, mixed-voltage industrial sensor interfaces where design longevity and supply headroom are critical.

Availability

TS339IDT is available at Aetrix Electronics and suitable for battery-powered instrumentation, motor protection circuits, and industrial temperature monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TS339IDT 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The TS339 belongs to ST's precision analog comparator product line, engineered specifically for low-power, high-accuracy threshold detection in resource-constrained embedded systems where supply efficiency and input fidelity are non-negotiable.

FAQ

Can TS339IDT operate from a 3.3 V supply?

Yes. TS339IDT supports single-supply operation from 2.7 V to 16 V, including 3.3 V nominal rails. At 3.3 V, it delivers 9 μA typical supply current per comparator, 1 pA input bias current, and maintains full functionality across –40 °C to +125 °C. Output high-state requires external pull-up to 3.3 V.

Does TS339IDT have internal hysteresis?

No. TS339IDT does not include internal hysteresis. Hysteresis must be added externally via positive feedback (e.g., resistor from output to non-inverting input) to prevent oscillation near threshold crossings in noisy environments.

What is the maximum load capacitance supported at the output?

TS339IDT's output stage is rated for CL ≤ 50 pF in timing-critical applications (e.g., 1.5 μs response). For heavier capacitive loads, rise/fall times increase linearly; for >100 pF, consider buffering or reducing pull-up resistance to maintain stability.

Is TS339IDT pin-compatible with LM339 in SO14 package?

Yes. TS339IDT uses identical SO14 pinout and functional mapping as LM339: pins 1–2, 4–5, 8–9, 11–12 are input pairs; pins 3, 6, 10, 13 are open-drain outputs; pin 7 is GND; pin 14 is V_CC. No PCB redesign is needed for drop-in replacement.