STMicroelectronics TSX339IPT

Overview

TSX339IPT from STMicroelectronics is a micropower CMOS quad voltage comparator in TSSOP14 package, featuring 5 µA typical supply current per comparator, 1 pA typical input bias current, and open-drain outputs compatible with 2.7–16 V single or ±1.35–±8 V dual supplies. It operates across –40 °C to +125 °C and is qualified for automotive applications.

For engineers reviewing the TSX339IPT datasheet, TSX339IPT pinout, TSX339IPT application, or TSX339IPT equivalent, this device supports precision threshold detection in battery-powered sensors, rail-to-rail input monitoring in ADAS subsystems, and low-power window comparators in industrial control modules - where ultra-low quiescent current and ground-sensing capability are critical.

Technical Context

The TSX339IPT implements four independent high-impedance CMOS comparators with rail-to-rail input common-mode range (0 V to V_CC−1.5 V), enabling direct sensing of signals referenced to ground. Each channel features open-drain output with 4 mA sink capability and guaranteed operation up to 16 V supply.

Its architecture eliminates phase reversal under overvoltage conditions and supports unused channel disable via power-rail tying. Input offset voltage is trimmed to ±5 mV max at 25 °C and ±6 mV over full temperature range, while ESD tolerance meets 4 kV HBM and 200 V MM standards.

Key Specifications

Pinout & Package

TSSOP14 package: 4.9 mm × 6.4 mm × 1.05 mm body, 0.65 mm pitch, thermally enhanced for automotive ambient operation up to +125 °C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TS339IPT and TSX3704IPT, the TSX339IPT delivers superior power efficiency and automotive-grade reliability, making it optimal for safety-critical, long-life embedded systems where open-drain flexibility and ground-sensing capability are essential design constraints.

Availability

TSX339IPT is available at Aetrix Electronics and suitable for automotive battery management, industrial sensor interface, medical wearable alert, and smart energy meter applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TSX339IPT 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 silicon solutions for automotive, industrial, and consumer markets since 1987.

The TSX339 belongs to ST's precision analog comparator product line, engineered specifically for ultra-low-power, high-reliability sensing in harsh environments - including engine compartments, factory floors, and portable medical devices.

FAQ

Can TSX339IPT operate with a single 3.3 V supply?

Yes. The TSX339IPT supports single-supply operation from 2.7 V to 16 V, including 3.3 V. At 3.3 V, typical supply current is 5 µA per comparator, input common-mode range extends from 0 V to 1.8 V, and output sink capability remains 4 mA - fully compatible with 3.3 V logic families when using appropriate pull-up resistors.

What is the maximum sink current per output, and does it vary with supply voltage?

Each open-drain output can sink up to 4 mA continuously, verified across the full 2.7–16 V supply range. Electrical characteristics tables confirm VOL ≤ 400 mV at I_OL = 4 mA and V_CC = 3 V, and ≤ 150 mV at V_CC = 16 V - indicating improved drive strength at higher supplies due to enhanced channel conduction.

How should unused comparator channels be terminated to minimize current consumption?

Unused channels must have both inputs tied to valid supply rails: connect IN+ to V_CC+ and IN− to V_CC− (or vice versa) to force a stable output state. This prevents internal metastability and avoids additional current draw beyond the specified 5 µA/comparator quiescent value - confirmed in Section 6.2 of DS11385 Rev 4.

Is the exposed pad on QFN16 variants electrically connected, and how should it be handled for TSX339IPT?

The TSX339IPT uses TSSOP14 packaging and has no exposed pad. However, the QFN16 variant (TSX339IQ4T) features an unconnected exposed pad that may be soldered to PCB ground plane for thermal enhancement or left floating - per Table 8 and Figure 21 in DS11385 Rev 4. No electrical connection exists between the pad and internal circuitry.