My Inquiry
My Account
Analog Devices Inc./Maxim Integrated LMX393AUA
- Part No.:
- LMX393AUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMX393AUA.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:9,066
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMX393AUA from Maxim Integrated is a dual, open-drain, low-voltage comparator with internal 2mV hysteresis, operating from 1.8V to 5.5V supply and rated for -40°C to +125°C automotive temperature range. It delivers 60µA per comparator supply current at 5V, 100ns propagation delay (100mV overdrive), and 100mV output saturation voltage at 1mA sink - enabling precise threshold detection in battery-powered sensor interfaces and power monitoring circuits.
For engineers reviewing the LMX393AUA datasheet, LMX393AUA pinout, LMX393AUA application, or LMX393AUA equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed drop-in alternatives for automotive-grade low-power comparator selection.
Technical Context
The LMX393AUA implements a dual-channel, rail-to-rail input CMOS comparator architecture with open-drain outputs and factory-trimmed internal hysteresis (2mV). Its input common-mode range extends from -0.1V below VSS to within 0.7V of VDD, supporting ground-referenced sensing without level-shifting.
Each comparator features no phase reversal under overdriven inputs, 70dB PSRR at 1.8V, and guaranteed operation down to 1.8V supply - making it suitable for direct integration with Li-ion battery rails and low-voltage microcontroller I/O domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion (3.0–3.7V), 3.3V logic, and 5V legacy systems without external regulators |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial edge-sensing applications |
| Supply Current per Comparator | 60µA at VDD = 5.0V - enables multi-year battery life in always-on wake-up comparators |
| Propagation Delay | 90ns (tPHL) / 200ns (tPLH) at 100mV overdrive, 5V - sufficient for <1MHz window-detection timing loops |
| Input Offset Voltage | ≤9mV max over full temperature range - ensures reliable 20mV+ threshold discrimination in noisy environments |
| Output Saturation Voltage | 100mV at ISINK = 1mA - allows clean logic-level interfacing with 1.8V/3.3V MCU GPIOs via pull-up |
| Hysteresis | 2mV internal - eliminates chatter on slow-moving signals (e.g., thermistor ramps, battery voltage sag) |
Pinout & Package
LMX393AUA is housed in an 8-pin µMAX package (3.0mm × 3.0mm × 1.1mm, 0.65mm pitch), optimized for space-constrained automotive modules and portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Positive supply input - must be bypassed with 0.1µF capacitor to VSS for stable high-speed operation |
| 2 | OUTA | Open-drain output of comparator A - requires external pull-up to define logic HIGH level and sink capability |
| 3 | INA− | Inverting input of comparator A - accepts signals down to −0.1V below VSS, enabling ground-referenced thresholds |
| 4 | INA+ | Noninverting input of comparator A - used with INA− to set differential trip point; immune to phase reversal when overdriven |
| 5 | VSS | Negative supply (GND) - shared reference for both comparators and critical for PSRR performance |
| 6 | INB+ | Noninverting input of comparator B - independent channel enables dual-threshold or window-comparator configurations |
| 7 | INB− | Inverting input of comparator B - supports separate signal path from comparator A with identical input range and noise immunity |
| 8 | OUTB | Open-drain output of comparator B - electrically isolated from OUTA; supports independent pull-up voltages or loads |
Key Features
| Feature | Design Value |
|---|---|
| Internal 2mV hysteresis | Eliminates need for external positive-feedback resistors in noise-prone environments like motor control feedback or battery voltage monitoring |
| Rail-to-rail input common-mode range | Supports direct connection to sensors referenced to GND or VDD without input biasing networks |
| No phase reversal on overdrive | Prevents false triggering when input differential exceeds ±100mV - critical for robust power-good and fault-detection circuits |
| Low 60µA supply current per comparator | Enables dual-comparator functionality in ultra-low-power wake-up controllers without compromising battery runtime |
| Guaranteed 1.8V operation | Allows seamless integration into energy-harvesting systems and coin-cell-powered IoT endpoints |
Applications
| Battery Voltage Monitoring | Automotive Door Lock Sensor Interface |
|---|---|
Use Scenario: Detecting low-battery condition (<3.2V) and overvoltage (>4.3V) in portable medical devices using a resistive divider off a single Li-ion cell. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - INA± monitors lower threshold, INB± monitors upper threshold. Use Value: Internal hysteresis prevents oscillation during gradual voltage decay; 100mV output saturation ensures reliable pull-up to 3.3V MCU GPIO without level shifters. |
Use Scenario: Interfacing Hall-effect door position sensors in automotive body control modules, where EMI and thermal drift affect analog thresholds. IC Role / Device Role / Timing Role: Comparator A detects door-closed state (magnet present), Comparator B validates latch engagement (second magnet). Use Value: −40°C to +125°C rating and 2mV hysteresis suppress false triggers from engine bay thermal transients and conducted RF noise. |
| USB-C Power Delivery Fault Detection | Industrial Temperature Threshold Alarm |
Use Scenario: Monitoring CC line voltage during USB-C negotiation to detect invalid source/sink attachment or short-circuit faults. IC Role / Device Role / Timing Role: Single comparator (OUTA) compares CC voltage against 0.8V and 2.0V reference thresholds generated by resistor dividers. Use Value: 1.8V minimum supply enables direct use of VBUS-derived 3.3V rail; 90ns tPHL supports fast fault response before PD controller timeout. |
Use Scenario: Triggering alarm outputs when RTD or NTC sensor voltage crosses preset hot/cold limits in programmable logic controllers. IC Role / Device Role / Timing Role: Dual comparator implements high-temperature cutoff (OUTA) and low-temperature warning (OUTB) with independent hysteresis bands. Use Value: Input offset ≤9mV ensures accurate 1°C-equivalent threshold resolution; rail-to-rail inputs accept sensor outputs directly without op-amp buffering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual open-drain comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV393IDR | No internal hysteresis; higher 100µA/comparator supply current; only rated to +85°C | Not suitable for automotive under-hood or battery-operated long-life designs requiring noise immunity | Select LMX393AUA when hysteresis, extended temperature, or sub-100µA current is mandatory |
| TLV3702IDR | Includes internal hysteresis (4mV); rail-to-rail output; higher 120µA/comparator supply current; same −40°C to +125°C rating | Requires external pull-down for open-collector compatibility; less optimal for simple MCU GPIO interfacing | Choose TLV3702IDR only if rail-to-rail push-pull output is required alongside hysteresis |
Compared with LMV393IDR, LMX393AUA adds factory hysteresis and automotive temperature support at lower quiescent current; compared with TLV3702IDR, it offers simpler open-drain interface and 40% lower supply current but lacks push-pull output flexibility.
Availability
LMX393AUA is available at Aetrix Electronics and suitable for automotive body electronics, battery management systems, and industrial sensor interface designs requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LMX393AUA 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The LMX393AUA belongs to Maxim's LMX3xx family of tiny-pack, low-voltage comparators - engineered specifically for space-constrained, battery-sensitive, and thermally harsh environments where reliability and noise immunity are non-negotiable.
FAQ
What is the maximum capacitive load the LMX393AUA outputs can drive reliably?
The LMX393AUA open-drain outputs are characterized up to 50pF capacitive load in the datasheet. Propagation delay increases from 90ns to ~150ns at 50pF (100mV overdrive, 5V supply). For loads >50pF, add a series resistor (10–100Ω) near the output pin to damp ringing and maintain clean edges - verified in typical operating characteristics Figure LMX331 toc06.
Does the LMX393AUA require external hysteresis resistors for stable operation?
No - the LMX393AUA includes factory-trimmed 2mV internal hysteresis, eliminating the need for external positive-feedback resistors in most noise-immune applications. This is confirmed in the Features section and DC Electrical Characteristics tables for LMX393H variants. External hysteresis is only needed if >2mV band is required.
Can the LMX393AUA operate with a 1.8V supply while driving a 3.3V pull-up?
Yes - the LMX393AUA's open-drain outputs are voltage-level agnostic. When VDD = 1.8V and the pull-up is connected to 3.3V, the output HIGH level equals 3.3V (minus leakage), and LOW level remains ≤100mV at 1mA sink. This is explicitly supported by the Absolute Maximum Ratings and Output Saturation Voltage specs across 1.8V–5.5V operation.
What is the input common-mode voltage range of the LMX393AUA at 1.8V supply?
At VDD = 1.8V, the input common-mode range is specified as −0.1V to +1.0V (VCM = −0.1V to VDD − 0.8V). This allows direct interfacing with ground-referenced sensors (e.g., thermistors, current-sense amps) without level-shifting circuitry - confirmed in DC Electrical Characteristics Table for 1.8V operation.
Is the LMX393AUA pin-compatible with the LMV393 series?
Yes - the LMX393AUA is a drop-in, pin-for-pin replacement for the LMV393 in the same µMAX package, as stated in the General Description. Both share identical pinout (VDD, OUTA, INA−, INA+, VSS, INB+, INB−, OUTB), enabling direct PCB substitution without layout changes.
LMX393AUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 1.8V ~ 5.5V
- :
- 7mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 73mA
- Current - Output (Typ):
- 200µA
- Current - Quiescent (Max):
- 70dB PSRR
- CMRR, PSRR (Typ):
- 400ns (Typ)
- Propagation Delay (Max):
- 2mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-µMAX
LMX393AUA FAQ
1.How can I place an order for LMX393AUA through Aetrix?
Please submit a Request for Quotation (RFQ) for LMX393AUA 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 LMX393AUA reliable?
The price and inventory of LMX393AUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMX393AUA is usually 5 days.
3.What payment methods are accepted for LMX393AUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMX393AUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMX393AUA?
LMX393AUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMX393AUA 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 LMX393AUA?
For technical support, including LMX393AUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMX393AUA requirements.
6.How does Aetrix verify that LMX393AUA is sourced from the original manufacturer or authorized distributors?
All LMX393AUA 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 LMX393AUA meets industry standards.
7.What is the process for return or replacement of LMX393AUA?
All LMX393AUA units undergo pre-shipment inspection (PSI). If there is an issue with LMX393AUA, 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 LMX393AUA part is unused and in its original packaging.
Return procedure for LMX393AUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMX393AUA Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
