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

STMicroelectronics TS393MD

Name: TS393MD
Brand: STMicroelectronics
SKU: TS393MD
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS393MD

Manufacturer:: STMicroelectronics

Category:: Comparators

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TS393MD.pdf

Description:: IC COMPARATOR 2 GEN PUR 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:3,417

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Product details

Overview

TS393MD from STMicroelectronics is a micropower dual CMOS voltage comparator operating from 4V to 16V single supply (or ±2V to ±8V dual), featuring 9µA typical supply current per comparator, 1pA typical input bias current, and 2.5µs typical propagation delay with 5mV overdrive - used in battery-powered sensor threshold detection and precision level sensing circuits.

For engineers reviewing the TS393MD datasheet, TS393MD pinout, TS393MD application, or TS393MD equivalent, key selection criteria include ultra-low quiescent current, rail-to-rail input common-mode range including ground, push-pull-compatible output stage, and extended industrial temperature operation from –55°C to +125°C.

Technical Context

The TS393MD implements two independent high-impedance CMOS comparators with input stages optimized for sub-1pA bias current and common-mode range extending to V_CC–1.5V and GND. Its open-drain compatible outputs support wired-OR logic and pull-up flexibility while maintaining fast response across supply voltages.

Designed for low-power analog monitoring, it avoids internal hysteresis and relies on external feedback for noise immunity. The device uses ST's proprietary CMOS process to achieve stable offset voltage (≤6.5mV) and high PSRR (≥70dB) without trimming, enabling cost-sensitive applications where calibration is impractical.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Current	9 µA typ per comparator - enables multi-year operation on coin-cell batteries in always-on monitoring nodes.
Input Bias Current	1 pA typ - preserves signal integrity in high-impedance sensor interfaces (e.g., photodiode, pH electrode).
Propagation Delay	2.5 µs typ at 5mV overdrive - supports kHz-range event detection without compromising power budget.
Input Common-Mode Range	0 V to V_CC–1.5 V - allows direct GND-referenced input sensing without level-shifting circuitry.
Output Type	Open-drain compatible - enables flexible interface to 1.8V/3.3V/5V logic and wired-OR bus configurations.
Operating Temperature	–55°C to +125°C - qualified for under-hood automotive, industrial control, and aerospace environments.
Input Offset Voltage	6.5 mV max - sets minimum detectable differential voltage in precision threshold applications.

Pinout & Package

TS393MD is housed in an SO-8 plastic micropackage (JEDEC MS-012AA), 4.9 mm × 3.9 mm footprint, 1.75 mm height, with gull-wing leads and lead-free (ECOPACK®) finish.

Pin/Terminal	Circuit Role	Design Meaning
1	Inverting Input (Comparator 1)	High-impedance node accepting reference or sensed signal; common-mode range includes GND.
2	Non-inverting Input (Comparator 1)	High-impedance node for active signal path; matched bias current minimizes offset drift.
3	Output (Comparator 1)	Open-drain NMOS output; requires external pull-up for logic-high assertion.
4	V_CC– (GND)	Power return reference; also serves as lower rail for dual-supply operation.
5	Non-inverting Input (Comparator 2)	Independent high-Z input; electrically isolated from Comparator 1 inputs.
6	Inverting Input (Comparator 2)	Matched input structure to Pin 1; supports differential or independent thresholding.
7	Output (Comparator 2)	Open-drain output with identical drive capability and timing to Pin 3.
8	V_CC+	Positive supply rail; supports 4V–16V operation with <25µA max total ICC at full temp range.

Key Features

Feature	Design Value
Micropower Operation	9 µA/comparator enables >10-year battery life in wireless sensor nodes using CR2032 cells.
GND-Inclusive Input Range	Allows direct connection of resistive divider networks referenced to system ground without level shifters.
Ultra-Low Input Bias Current	1 pA typ eliminates loading error in megohm-range sensor bridges and capacitive touch sense circuits.
Wide Supply Flexibility	Operates from 4V to 16V single supply or ±2V to ±8V dual supply - simplifies design across legacy and modern systems.
Extended Temperature Grade	–55°C to +125°C rating supports deployment in engine control units, motor drives, and outdoor infrastructure.

Applications

Battery Voltage Monitor

Over-Temperature Protection

Use Scenario: Monitoring Li-ion cell voltage during charging/discharging cycles in portable medical devices.

IC Role / Device Role / Timing Role: Dual comparator independently triggers low-voltage cutoff and overvoltage shutdown thresholds.

Use Value: 9µA quiescent current extends standby time between charges; GND-referenced inputs simplify resistor-divider design.

Use Scenario: Detecting thermal runaway in brushless DC motor windings using NTC thermistors.

IC Role / Device Role / Timing Role: Compares thermistor voltage against two fixed references to assert fault signals at defined trip points.

Use Value: 1pA input bias prevents self-heating error in high-resistance NTC networks; wide temp grade ensures reliability at 125°C ambient.

Smoke Detector Threshold Detection

Industrial PLC Analog Input Conditioning

Use Scenario: Interpreting ionization chamber current changes in residential smoke alarms.

IC Role / Device Role / Timing Role: Converts tiny current variations into digital alarm signals via transimpedance amplifier + comparator stage.

Use Value: Sub-picoampere input bias avoids signal corruption from leakage paths; open-drain outputs interface directly to microcontroller GPIOs.

Use Scenario: Converting 4–20mA loop signals into discrete status flags for valve position or pressure limit alerts.

IC Role / Device Role / Timing Role: Dual comparator compares loop-derived voltage against upper/lower limits to generate fail-safe logic outputs.

Use Value: 2.5µs response enables real-time fault detection in safety-critical loops; SO-8 package supports automated PCB assembly.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM393DR	Bipolar input stage; 250µA supply current; input common-mode range excludes GND below V_CC–1.5V.	Higher power consumption limits use in energy-harvesting designs; less suitable for GND-referenced sensors.	Select when cost sensitivity outweighs power and input range requirements.
TLV3702IDR	CMOS input; 1.6µA supply current; rail-to-rail input; but only rated to +125°C (not –55°C).	Lower power than TS393MD but lacks extended cold-temperature qualification for automotive under-hood use.	Select for ultra-low-power applications above –40°C ambient, where extended low-temp operation is unnecessary.

Compared with LM393DR and TLV3702IDR, TS393MD uniquely balances ultra-low power (9µA), GND-inclusive input range, and full –55°C to +125°C operation - making it optimal for harsh-environment, long-life battery systems where both cold-start capability and minimal self-loading matter.

Availability

TS393MD is available at Aetrix Electronics and suitable for battery management systems, industrial safety monitors, automotive thermal protection circuits, and portable instrumentation requiring stable component supply across extended temperature ranges.

Supply support for TS393MD 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 products for automotive, industrial, power, and analog/mixed-signal applications.

The TS393 belongs to ST's precision analog comparator family, engineered specifically for micropower, high-input-impedance sensing in resource-constrained and thermally demanding environments.

FAQ

Can TS393MD operate from a 3.3V supply?

No - the TS393MD minimum specified supply voltage is 4V. While some units may function at 3.3V, electrical characteristics including propagation delay, input offset, and output drive are not guaranteed below 4V per the datasheet's operating conditions table. For 3.3V systems, consider the TS393CD variant (2.7V–16V range) instead.

Does TS393MD have internal hysteresis?

No - TS393MD has no internal hysteresis. Its output transitions sharply at the input crossing point, making it susceptible to noise-induced oscillation near threshold. External positive feedback (e.g., resistor from output to non-inverting input) must be added for noise-immune switching in real-world environments.

What is the maximum load capacitance supported on TS393MD outputs?

The datasheet specifies timing parameters (t_PLH/t_PHL) with C_L = 50pF and R_L = 5.1kΩ. Driving larger capacitive loads (>100pF) increases propagation delay and may cause ringing due to lack of output buffering. For higher capacitance, add a series resistor (22–100Ω) close to the output pin to dampen overshoot.

Is TS393MD pin-compatible with LM393?

Yes - TS393MD shares identical SO-8 pinout and functional behavior with LM393, including open-drain outputs and same input terminal assignments. However, note that TS393MD's input common-mode range includes GND while LM393's does not - this enables simplified circuit design but requires verification of reference placement in existing LM393 layouts.

TS393MD Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Series:: -

Packaging:: Tube

Product Status:: Obsolete

Type:: General Purpose

Number of Elements:: 2

Output Type:: CMOS, Open-Drain

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

:: 5mV @ 5V

Voltage - Input Offset (Max):: 1pA @ 5V

Current - Input Bias (Max):: -

Current - Output (Typ):: 25µA

Current - Quiescent (Max):: 71dB CMRR

CMRR, PSRR (Typ):: -

Propagation Delay (Max):: -

Hysteresis:: -55°C ~ 125°C

Operating Temperature:: -

Grade:: -

Qualification:: Surface Mount

:: 8-SOIC

TS393MD FAQ

1.How can I place an order for TS393MD through Aetrix?

Please submit a Request for Quotation (RFQ) for TS393MD 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 TS393MD reliable?

The price and inventory of TS393MD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS393MD is usually 5 days.

3.What payment methods are accepted for TS393MD?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS393MD transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS393MD?

TS393MD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS393MD 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 TS393MD?

For technical support, including TS393MD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS393MD requirements.

6.How does Aetrix verify that TS393MD is sourced from the original manufacturer or authorized distributors?

All TS393MD 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 TS393MD meets industry standards.

7.What is the process for return or replacement of TS393MD?

All TS393MD units undergo pre-shipment inspection (PSI). If there is an issue with TS393MD, 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 TS393MD part is unused and in its original packaging.

Return procedure for TS393MD:

1.Submit a request within 90 days.

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

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