STMicroelectronics TS393CDT

Overview

TS393CDT from STMicroelectronics is a micropower dual CMOS voltage comparator with 9 µA typical supply current per comparator, 2.7–16 V single-supply operation, and 1 pA typical input bias current. It features rail-to-rail input common-mode range including ground, 2.5 µs typical response time at 5 mV overdrive, and SO-8 packaging - used in battery-powered sensor threshold detection and low-power voltage monitoring circuits.

For engineers reviewing the TS393CDT datasheet, TS393CDT pinout, TS393CDT application, or TS393CDT equivalent, key selection criteria include ultra-low quiescent current, ground-sensing capability, open-drain output compatibility with pull-up networks, and functional equivalence to LM393 in space-constrained industrial and portable designs.

Technical Context

The TS393CDT integrates two independent high-impedance CMOS comparators sharing a common supply domain. Its input stage uses MOSFET-based differential pairs enabling 10¹² Ω typical input impedance and 1 pA bias/offset currents - critical for high-impedance source interfacing like photodiode or thermistor networks.

Each comparator delivers open-drain outputs compatible with mixed-voltage logic systems (e.g., 3.3 V logic sensing 5 V analog rails). The device operates across 0 °C to +70 °C ambient temperature and maintains stable performance under supply variations (70 dB CMRR, 70–80 dB SVR), supporting reliable level detection in noisy industrial environments.

Key Specifications

Pinout & Package

TS393CDT is housed in an SO-8 (Small Outline) plastic micropackage, 4.8–5.0 mm wide × 5.8–6.2 mm long × 1.25–1.75 mm height, with 1.27 mm lead pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR and TLV3702IDR, TS393CDT uniquely balances ultra-low power (9 µA), ground-sensing inputs, and open-drain outputs - making it optimal for battery-powered systems needing flexible logic interfacing and minimal source loading.

Availability

TS393CDT is available at Aetrix Electronics and suitable for battery-powered sensor nodes, industrial voltage monitors, and portable medical devices requiring stable component supply with guaranteed long-term availability.

Supply support for TS393CDT 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 TS393 belongs to ST's precision analog comparators product line, engineered specifically for energy-constrained applications where nanoscale input currents and rail-to-rail input operation are essential for accurate low-voltage signal conditioning.

FAQ

What is the maximum operating supply voltage for TS393CDT?

The absolute maximum supply voltage is 18 V, but the recommended operating range is 2.7 V to 16 V for reliable performance. Operation above 16 V risks exceeding internal junction temperature limits and degrading long-term reliability, even if within absolute ratings. Thermal derating applies above 70 °C ambient.

Can TS393CDT drive an LED directly from its output?

Yes - each open-drain output can sink up to 20 mA, sufficient to drive standard indicator LEDs with appropriate series resistors. For example, with a 5 V pull-up and red LED (1.8 V V_F), a 150 Ω resistor yields ~21 mA sink current. Ensure total package power dissipation remains below 500 mW at maximum ambient temperature.

Does TS393CDT require external hysteresis for noise immunity?

No internal hysteresis is provided, so external positive feedback is required for noisy input environments. A typical configuration uses a 10 MΩ resistor from output to non-inverting input, adding ~10 mV of hysteresis. This avoids false triggering from EMI or sensor noise while preserving the comparator's 1 pA input bias advantage.

Is TS393CDT pin-compatible with LM393 in SO-8 packages?

Yes - TS393CDT uses identical SO-8 pinout and footprint as LM393DR, enabling drop-in replacement in existing layouts. However, note that TS393CDT's ground-sensing inputs and lower supply current may alter bias network values; verify reference divider stability and output pull-up sizing for logic compatibility.