STMicroelectronics TSX3702IST

Overview

TSX3702IST from STMicroelectronics is a micropower CMOS dual voltage comparator with 5 µA typical supply current per comparator, 1 pA typical input bias current, and push-pull output stage. It operates from 2.7 V to 16 V single supply (or ±1.35 V to ±8 V dual), features rail-to-rail input common-mode range including ground, and is qualified for automotive applications in MiniSO8 package.

For engineers reviewing the TSX3702IST datasheet, TSX3702IST pinout, TSX3702IST application, or TSX3702IST equivalent, key selection considerations include ultra-low quiescent current, high-impedance inputs (10¹² Ω), fast 2.7 µs response at 5 mV overdrive, ESD tolerance (4 kV HBM), and compatibility with TS3702 while offering improved offset voltage and ESD robustness.

Technical Context

The TSX3702IST integrates two independent CMOS comparators with ESD-protected input stages enabling input voltages from –0.3 V to 16 V regardless of VCC+, preventing phase reversal. Its internal architecture supports operation across –40 °C to +125 °C with guaranteed performance under automotive-grade thermal stress.

Each comparator delivers push-pull output capable of sourcing/sinking 4 mA with low output voltage drop (90–400 mV depending on supply and load), and exhibits strong rejection of supply and common-mode noise-CMRR up to 90 dB and SVRR up to 90 dB at 16 V supply.

Key Specifications

Pinout & Package

TSX3702IST is supplied in MiniSO8 package (3.0 mm × 4.9 mm, 0.65 mm pitch), a space-saving plastic micropackage optimized for high-density automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TS3702IDT, TSX3702IST offers tighter offset, higher ESD, and automotive qualification at modest current penalty; versus TLV3702IDR, it trades 3.4 µA higher ICC for –0.3 V input support and full automotive temperature coverage-critical for under-hood reliability.

Availability

TSX3702IST is available at Aetrix Electronics and suitable for automotive engine control, industrial sensor interfaces, battery management systems, and smart power outlet designs requiring stable component supply across extended temperature and long product lifecycles.

Supply support for TSX3702IST 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 TSX3702 series belongs to ST's precision analog comparators product line, engineered specifically for ultra-low-power, high-reliability sensing in automotive and industrial environments where extended temperature operation and ESD resilience are mandatory.

FAQ

What is the maximum input voltage allowed on TSX3702IST pins relative to VCC+?

The TSX3702IST allows input voltages from –0.3 V to 16 V regardless of VCC+ value. When input exceeds VCC+, leakage through internal ESD diodes remains below 250 nA at 125 °C, enabling robust interface with unregulated or floating sensor sources without external clamping.

Can TSX3702IST operate with a single 3.3 V supply and still drive a 5 V logic input?

No-its push-pull output swings between VCC+ and VCC–, so with 3.3 V supply, VOH is typically 3.0 V (≤300 mV drop). To interface with 5 V logic, use an external level shifter or select a comparator with open-drain output like TSX393, which supports pull-up to 5 V.

Is the MiniSO8 package of TSX3702IST compatible with standard SO8 PCB footprints?

No-the MiniSO8 (3.0 × 4.9 mm) is smaller than standard SO8 (3.9 × 4.9 mm) and has different pad pitch (0.65 mm vs. 1.27 mm). It requires dedicated layout with reduced pad size and spacing; mechanical adaptation is not feasible without redesign.

How does the input common-mode range behave when VCC+ = 16 V?

At VCC+ = 16 V, the specified common-mode input range is 0 V to 14.5 V (VCC+ – 1.5 V). However, the device tolerates inputs as low as –0.3 V and as high as 16 V due to its ESD-clamp architecture-this extended range is explicitly guaranteed and used in overvoltage-tolerant sensor interfaces.