STMicroelectronics TSX3702IYDT

Overview

TSX3702IYDT from STMicroelectronics is an automotive-grade micropower dual CMOS 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 delivers 2.7 µs typical response time at 5 mV overdrive - deployed in battery monitoring and engine control units.

For engineers reviewing the TSX3702IYDT datasheet, TSX3702IYDT pinout, TSX3702IYDT application, or TSX3702IYDT equivalent, key selection criteria include ultra-low quiescent current, AEC-Q100 qualification, input voltage tolerance beyond V_CC, and compatibility with legacy TS3702 designs in SO8 footprint.

Technical Context

The TSX3702IYDT integrates two independent high-impedance comparators (10¹² Ω typical input impedance) with ESD-hardened input structures enabling -0.3 V to 16 V input voltage range regardless of V_CC. Its internal ESD clamp network limits leakage to 0.2 nA at 25 °C when inputs exceed V_CC, preventing phase reversal under overvoltage conditions.

Each comparator uses a CMOS input stage followed by a push-pull output driver capable of sourcing/sinking ≥4 mA while maintaining low output voltage drop (90–400 mV depending on supply and load). The device achieves 72–90 dB common-mode rejection and 73–90 dB supply voltage rejection across 3–16 V operation.

Key Specifications

Pinout & Package

TSX3702IYDT is supplied in SO8 package (8-pin plastic micropackage), compliant with AEC-Q100 automotive qualification. Pin numbering follows standard SO8 top-view convention with pin 1 marked by notch or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TS3702IDT, TSX3702IYDT delivers half the quiescent current and enhanced ESD protection for automotive environments; versus LMV393QDRQ1, it offers superior micropower performance and tighter offset voltage at the expense of open-drain flexibility.

Availability

TSX3702IYDT is available at Aetrix Electronics and suitable for battery management systems, engine control units, occupant detection modules, and electric power steering fault monitors requiring stable component supply across automotive production lifecycles.

Supply support for TSX3702IYDT 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 automotive-qualified analog comparators product line, engineered specifically for low-power, high-reliability sensing in harsh-temperature vehicle subsystems where precision and longevity are critical.

FAQ

Is TSX3702IYDT pin-compatible with TS3702IDT?

Yes, TSX3702IYDT uses the same SO8 package and identical pinout as TS3702IDT, enabling drop-in replacement in existing PCB layouts. Both share identical pin functions (OUT1, IN1−, IN1+, V_CC−, V_CC+, IN2−, IN2+, OUT2), though TSX3702IYDT adds AEC-Q100 qualification and improved electrical specs.

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

Inputs may swing from −0.3 V to 16 V regardless of V_CC level. At V_CC = 5 V, this allows direct interfacing with 12 V battery rails or CAN transceiver outputs without level-shifting circuitry. Leakage remains below 250 nA at 125 °C when inputs exceed V_CC.

Does TSX3702IYDT support dual-supply operation?

Yes, it supports dual supplies from ±1.35 V to ±8 V. When operated with ±5 V supplies, the input common-mode range extends from −3.5 V to +3.5 V, and output swing reaches within 150 mV of each rail at 4 mA load - verified per Table 4 and Table 5 in DS10241 Rev 6.

Can TSX3702IYDT drive an LED directly?

No, TSX3702IYDT outputs are rated for 20 mA absolute maximum sink/source current, but sustained LED drive requires thermal derating and current limiting. Its 4 mA guaranteed drive at 150 mV drop is intended for logic-level interfacing; direct LED connection risks exceeding safe operating area and degrading long-term reliability.