STMicroelectronics TS339CDT

Overview

TS339CDT from STMicroelectronics is a micropower quad CMOS voltage comparator with 9 μA typical supply current per comparator, 1.5 μs typical response time at 5 mV overdrive, and input common-mode range extending to ground. It operates from 2.7 V to 16 V single supply (or ±1.35 V to ±8 V dual supply), features 1 pA typical input bias current, and is pin-to-pin compatible with LM339 in SO14 package for legacy system upgrades in battery-powered sensor monitoring circuits.

For engineers reviewing the TS339CDT datasheet, TS339CDT pinout, TS339CDT application, or TS339CDT equivalent, key selection criteria include ultra-low quiescent current, rail-to-rail input capability down to GND, fast propagation delay under light overdrive, and compatibility with existing LM339 PCB layouts requiring minimal redesign.

Technical Context

The TS339CDT integrates four independent high-impedance CMOS comparators on a single die, each with complementary open-drain outputs and no internal pull-ups. Its input stage uses MOSFET-based differential pairs enabling 10¹² Ω typical input impedance and 1 pA input bias current - critical for high-precision voltage threshold detection in high-source-impedance sensor interfaces.

It supports wide supply ranges (2.7–16 V) while maintaining stable offset voltage (≤6.5 mV) and common-mode rejection (≥70 dB), and delivers consistent 1.5–2.5 μs propagation delay across temperature (0 °C to +70 °C) and supply voltages - making it suitable for timing-critical window comparators and analog-to-digital front-ends.

Key Specifications

Pinout & Package

TS339CDT is housed in a 14-lead SO14 (Small Outline) plastic micropackage per JEDEC MS-012, with 1.27 mm pitch and 8.55–8.75 mm body length. Pin assignments are validated per ST's official datasheet Figure 2 and Table 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339DR and TS3704CDT, TS339CDT uniquely balances ultra-low power, GND-sensing capability, and open-drain flexibility - making it optimal for battery-powered, multi-threshold, and mixed-voltage interface designs where layout reuse and energy efficiency are co-primary constraints.

Availability

TS339CDT is available at Aetrix Electronics and suitable for battery voltage monitoring, motor overcurrent protection, smoke detector sensing circuits, and industrial temperature threshold alarms requiring stable component supply and long-term production continuity.

Supply support for TS339CDT 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, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.

The TS339 belongs to ST's precision analog comparator product line, engineered specifically for ultra-low-power, high-input-impedance sensing applications in portable and energy-constrained systems.

FAQ

Can TS339CDT operate from a 3.3 V supply?

Yes. TS339CDT supports single-supply operation from 2.7 V to 16 V, including standard 3.3 V rails. At 3.3 V, typical supply current remains 9 μA/comparator, input offset voltage is ≤6.5 mV, and output low voltage is ≤550 mV at 6 mA sink - fully compatible with 3.3 V logic interfaces when paired with appropriate pull-up voltage.

Does TS339CDT require external pull-up resistors on its outputs?

Yes. All four outputs are open-drain and require external pull-up resistors to define the high logic level. Pull-up values between 1 kΩ and 100 kΩ are typical; lower values improve rise time but increase static current, while higher values reduce power but slow switching - selection depends on bus capacitance and timing requirements.

What is the maximum input voltage allowed when VCC = 5 V?

Per absolute maximum ratings, differential input voltage (Vid) may reach ±18 V, and individual input voltage (Vi) may exceed VCC up to 18 V, provided the common-mode voltage (Vicm = (Vin+ + Vin−)/2) stays within 0 V to VCC–1.2 V. This allows safe overvoltage tolerance in transient-prone industrial inputs.

Is TS339CDT RoHS compliant and halogen-free?

Yes. TS339CDT is manufactured in ST's ECOPACK®-compliant SO14 package, meeting RoHS Directive 2011/65/EU and halogen-free requirements per IEC 61249-2-21. The "ECOPACK" marking on the device and packaging confirms compliance with ST's environmental standards.