STMicroelectronics TS3702IN

Overview

TS3702IN from STMicroelectronics is a micropower dual CMOS voltage comparator with push-pull outputs, 9 μA typical supply current per comparator, 2.7–16 V single-supply operation, and 1 pA typical input bias current. It operates across –40°C to +125°C and replaces bipolar LM393 in battery-powered sensor monitoring and precision threshold detection circuits.

For engineers reviewing the TS3702IN datasheet, TS3702IN pinout, TS3702IN application, or TS3702IN equivalent, key selection criteria include ultra-low quiescent current, rail-to-rail input common-mode range including ground, push-pull output eliminating external pull-ups, and compatibility with legacy LM393 layouts in industrial control and portable instrumentation designs.

Technical Context

The TS3702IN integrates two independent high-impedance CMOS comparators sharing a common supply domain. Its input stage features MOSFET-based differential pairs enabling 1 pA bias current and 0 V to (V_CC − 1.5 V) common-mode range - critical for ground-referenced sensing. The push-pull output stage drives logic-level loads directly without pull-up resistors, maintaining TTL-compatible rise/fall times.

Designed for wide-supply flexibility, it supports single supplies from 2.7 V to 16 V or dual ±1.35 V to ±8 V. Internal ESD protection (400 V HBM, 1.5 kV CDM) and 82 dB CMRR at 5 V ensure robustness in noisy industrial environments where precise voltage window detection is required.

Key Specifications

Pinout & Package

DIP8 plastic package (0.3-inch width), through-hole mounting, 8-pin dual in-line configuration with standard 2.54 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR and TLV3702IDR, TS3702IN uniquely balances ultra-low power (9 μA), through-hole DIP8 availability, full LM393 compatibility, and extended industrial temperature range - making it optimal for legacy-replacement upgrades in field-deployed equipment.

Availability

TS3702IN is available at Aetrix Electronics and suitable for industrial temperature monitoring, battery-powered smoke detectors, programmable logic supply monitors, and motor overcurrent protection requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TS3702IN 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 industrial, automotive, and consumer markets.

The TS3702 belongs to ST's precision analog comparator family, engineered specifically for micropower, ground-sensing, and drop-in LM393 replacement applications in harsh-environment industrial control and portable instrumentation.

FAQ

Can TS3702IN operate from a 2.7 V single supply?

Yes. TS3702IN is fully specified from 2.7 V to 16 V single supply (or ±1.35 V to ±8 V dual supply). At 2.7 V, it maintains 1 pA input bias current, 5 mV max offset voltage, and functional push-pull outputs capable of driving 3.3 V logic loads with VOL ≤ 575 mV at 4 mA sink current.

Does TS3702IN require external pull-up resistors on its outputs?

No. TS3702IN features true CMOS push-pull outputs that actively drive both high and low states. Unlike open-collector comparators such as LM393, it requires no external pull-up resistors - reducing component count, PCB area, and potential noise coupling from resistor thermal noise or layout parasitics.

What is the maximum input common-mode voltage for TS3702IN at 12 V supply?

At V_CC+ = 12 V, the input common-mode voltage range is 0 V to 10.5 V (V_CC+ − 1.5 V). This allows direct interfacing with signals referenced to ground or to mid-supply without level-shifting circuitry, supporting applications like battery cell voltage monitoring where one input is tied to GND.

Is TS3702IN pin-compatible with LM393 in DIP8 packages?

Yes. TS3702IN uses identical DIP8 pinout and functional behavior as LM393: Pin 1 (In−2), Pin 2 (Out2), Pin 3 (In+2), Pin 4 (GND), Pin 5 (In−1), Pin 6 (Out1), Pin 7 (In+1), Pin 8 (V_CC+). No PCB redesign is needed for drop-in replacement, though pull-up resistors become obsolete due to push-pull outputs.