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Home > Products > Integrated Circuits (ICs) > Linear > Comparators

STMicroelectronics TSX393IST

Name: TSX393IST
Brand: STMicroelectronics
SKU: TSX393IST
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSX393IST

Manufacturer:: STMicroelectronics

Category:: Comparators

Package:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Datasheet:: TSX393IST.pdf

Description:: IC COMPARATOR 2 CMOS 8MINISO

Quantity:: RFQ Add To RFQ list

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Inventory:4,894

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Product details

Overview

TSX393IST from STMicroelectronics is a micropower CMOS dual voltage comparator with open-drain outputs, designed for automotive and industrial systems requiring ultra-low supply current (5 µA typ. per comparator), rail-to-rail input common-mode range including ground, and high ESD tolerance (4 kV HBM). It operates from 2.7 V to 16 V single supply and delivers 2 µs typical response time with 5 mV overdrive in MiniSO8 packaging.

For engineers reviewing the TSX393IST datasheet, TSX393IST pinout, TSX393IST application, or TSX393IST equivalent, this device is selected for precision threshold detection in battery-powered sensors, automotive body control modules, and industrial analog monitoring where low quiescent current, ground-sensing capability, and AEC-Q100-compliant reliability are mandatory.

Technical Context

The TSX393IST implements two independent CMOS comparators with ESD-protected inputs, each featuring picoampere-level input bias current (1 pA typ.) and high input impedance (10¹² Ω typ.), enabling direct interfacing with high-impedance sources like thermistors and photodiodes without signal loading. Its input stage supports common-mode voltages from ground to V_CC − 1.5 V across the full −40 °C to +125 °C operating range.

Each comparator uses an open-drain output stage compatible with mixed-voltage logic interfaces, supporting pull-up to any voltage ≤18 V. The device maintains stable operation under wide supply variation (2.7–16 V) and exhibits 73 dB typical common-mode rejection at 5 V supply, with propagation delay tightly specified down to 0.46 µs (t_PHL) at 100 mV overdrive.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.7 V to 16 V single supply - enables direct use in 3.3 V, 5 V, and 12 V automotive/industrial rails without regulation.
Supply Current per Comparator	5 µA typ. at 3 V - allows multi-year battery life in always-on sensor nodes with dual-threshold detection.
Input Bias Current	1 pA typ. at 25 °C - preserves accuracy when driving from megaohm-level source impedances (e.g., pH electrodes, capacitive sensors).
Response Time (5 mV overdrive)	2.0 µs t_PHL, 2.5 µs t_PLH - supports fast edge detection in motor stall sensing and overvoltage latch circuits.
Input Common-Mode Range	0 V to V_CC − 1.5 V - permits direct ground-referenced input monitoring (e.g., battery cell voltage, current-sense amplifier output).
ESD Tolerance	4 kV HBM - meets automotive system-level ESD robustness requirements without external protection diodes.
Operating Temperature	−40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood and chassis-mounted applications.

Pinout & Package

TSX393IST is packaged in MiniSO8 (plastic micropackage), a compact 3.0 mm × 4.9 mm surface-mount outline with 0.65 mm pitch, optimized for space-constrained automotive ECUs and portable industrial controllers.

Pin/Terminal	Circuit Role	Design Meaning
1 (Out1)	Comparator 1 open-drain output	Requires external pull-up; sinks up to 4 mA; compatible with 1.8 V–15 V logic levels.
2 (In1−)	Inverting input of comparator 1	High-impedance node (10¹² Ω); accepts signals from 0 V to V_CC − 1.5 V.
3 (In1+)	Non-inverting input of comparator 1	Same electrical characteristics as In1−; differential input voltage range ±18 V.
4 (V_CC−)	Negative supply / ground reference	Connected to system GND; defines lower rail for both comparators and internal biasing.
5 (V_CC+)	Positive supply input	Accepts 2.7–16 V; powers both comparators and internal ESD clamps.
6 (Out2)	Comparator 2 open-drain output	Independent of Out1; identical sink capability and voltage compatibility.
7 (In2−)	Inverting input of comparator 2	Electrically isolated from In1−; supports separate threshold monitoring paths.
8 (In2+)	Non-inverting input of comparator 2	Enables dual independent comparisons (e.g., window comparator with shared reference).

Key Features

Feature	Design Value
Micropower operation	5 µA per comparator enables >10-year battery life in wireless sensor transmitters with dual-threshold wake-up logic.
Ground-sensing input stage	Input common-mode range includes 0 V - eliminates need for level-shifting circuitry when monitoring grounded sensors or shunt resistors.
Open-drain outputs with high-voltage tolerance	Outputs sink up to 4 mA and tolerate up to 18 V on pull-up rail - simplifies interface to legacy 12 V logic or mixed-voltage microcontrollers.
AEC-Q100 qualified	Qualified to Grade 1 (−40 °C to +125 °C) - certified for automotive body electronics, lighting control, and powertrain auxiliary monitoring.
Picoampere input bias current	1 pA typ. ensures <1 µV error from 1 MΩ source impedance - critical for precision thermistor or RTD-based temperature monitoring.

Applications

Automotive Battery Monitoring

Industrial Sensor Interface

Use Scenario: Real-time monitoring of 12 V lead-acid battery voltage during engine start-stop cycles to detect deep discharge or overcharge conditions.

IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one input compares against 11.8 V (low threshold), the other against 14.8 V (high threshold), both referenced to ground.

Use Value: Ultra-low 5 µA supply current prevents parasitic drain during vehicle sleep mode; ground-sensing inputs eliminate level-shifters required by older comparators.

Use Scenario: Interfacing with high-impedance humidity and temperature sensors in HVAC control panels, where signal integrity must be preserved across long PCB traces.

IC Role / Device Role / Timing Role: Comparator 1 detects RH threshold crossing; Comparator 2 monitors NTC thermistor voltage to enable temperature-compensated humidity alarms.

Use Value: 1 pA input bias current avoids measurement errors from sensor leakage; 2 µs response enables rapid fault detection before thermal runaway occurs.

Portable Medical Device Safety

Smart Energy Meter Threshold Detection

Use Scenario: Low-power glucose meter with dual-alert logic: one comparator triggers low-battery warning, the other validates sensor insertion via contact resistance detection.

IC Role / Device Role / Timing Role: Dual independent comparators sharing same V_CC but with separate references - one monitors battery divider, the other reads sensor pad voltage.

Use Value: MiniSO8 footprint saves board area in handheld enclosures; 5 µA total quiescent current extends disposable battery life beyond 2 years.

Use Scenario: Tamper detection in utility meters using magnetic reed switch and current transformer outputs to identify unauthorized access or load bypass attempts.

IC Role / Device Role / Timing Role: Comparator 1 processes zero-crossing signal from CT; Comparator 2 monitors Hall-effect sensor output for magnet presence - both feed MCU interrupt lines.

Use Value: 4 kV HBM ESD rating withstands field-induced transients; open-drain outputs interface directly to 3.3 V MCU GPIOs with 5 V-tolerant pull-ups for noise margin.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TS393IDT	Higher supply current (12 µA typ.), wider input offset (±5 mV max), no AEC-Q100 qualification	Limited to commercial-temperature industrial controls; not suitable for automotive under-hood use	Select only if cost sensitivity outweighs power and qualification requirements.
TSX3702IST	Push-pull output (no external pull-up needed), higher ICC (12 µA typ.), same input specs	Better for driving LEDs or logic directly; unsuitable where wired-OR bus or mixed-voltage interfacing is required	Choose when output drive simplicity is prioritized over voltage-level flexibility.

Compared with TS393IDT, TSX393IST reduces supply current by 58% and adds automotive qualification; compared with TSX3702IST, it trades push-pull convenience for open-drain interoperability with legacy 12 V systems and I²C-style buses.

Availability

TSX393IST is available at Aetrix Electronics and suitable for automotive battery management, industrial sensor conditioning, portable medical safety monitoring, and smart energy meter tamper detection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TSX393IST 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

The TSX393 series belongs to ST's precision analog comparators product line, engineered specifically for ultra-low-power, high-reliability threshold detection in harsh-environment applications where ground-sensing capability and AEC-Q100 compliance are non-negotiable.

FAQ

What is the maximum allowable input voltage relative to V_CC for TSX393IST?

The TSX393IST allows input voltages from −0.3 V to 16 V regardless of V_CC value, due to its internal ESD clamp architecture. When input exceeds V_CC + 0.3 V, leakage through protection diodes remains below 250 nA at 125 °C, enabling safe overvoltage tolerance in unregulated sensor interfaces.

Can TSX393IST drive an LED directly from its output?

No - TSX393IST has open-drain outputs and cannot source current. To drive an LED, connect the anode to a positive supply (≤18 V) and the cathode to Out1 or Out2; the comparator will sink current when active. Maximum sink current is 4 mA, limiting LED brightness but ensuring reliable indicator operation without external transistor.

Is the TSX393IST pin-compatible with TS393 in MiniSO8 package?

Yes - TSX393IST uses the same MiniSO8 pinout and footprint as TS393IPT and TS393IDT variants. All electrical connections (Out1, In1−, In1+, V_CC−, V_CC+, Out2, In2−, In2+) match identically, enabling drop-in replacement where enhanced ESD tolerance and lower supply current are beneficial.

Does TSX393IST require external hysteresis for stable switching?

Not inherently - the TSX393IST has no built-in hysteresis. For noisy input signals (e.g., from inductive sensors), external positive feedback (e.g., 10 MΩ resistor from Out1 to In1+) must be added to create ~10 mV hysteresis. This design choice preserves flexibility for applications needing precise, adjustable thresholds without fixed internal offsets.

TSX393IST Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: CMOS

Number of Elements:: 2

Output Type:: Open-Drain

Voltage - Supply, Single/Dual (±):: 2.7V ~ 16V, ±1.35V ~ 8V

:: 5mV

Voltage - Input Offset (Max):: 10pA

Current - Input Bias (Max):: -

Current - Output (Typ):: 8µA

Current - Quiescent (Max):: 85dB CMRR

CMRR, PSRR (Typ):: 2.5µs

Propagation Delay (Max):: -

Hysteresis:: -40°C ~ 125°C

Operating Temperature:: -

Grade:: -

Qualification:: Surface Mount

:: 8-MiniSO

TSX393IST FAQ

1.How can I place an order for TSX393IST through Aetrix?

Please submit a Request for Quotation (RFQ) for TSX393IST on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TSX393IST reliable?

The price and inventory of TSX393IST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSX393IST is usually 5 days.

3.What payment methods are accepted for TSX393IST?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSX393IST transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSX393IST?

TSX393IST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSX393IST order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TSX393IST?

For technical support, including TSX393IST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSX393IST requirements.

6.How does Aetrix verify that TSX393IST is sourced from the original manufacturer or authorized distributors?

All TSX393IST products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TSX393IST meets industry standards.

7.What is the process for return or replacement of TSX393IST?

All TSX393IST units undergo pre-shipment inspection (PSI). If there is an issue with TSX393IST, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TSX393IST part is unused and in its original packaging.

Return procedure for TSX393IST:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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