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Analog Devices Inc./Maxim Integrated LMX393AUA+T
- Part No.:
- LMX393AUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMX393AUA+T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,600
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Product details
Overview
LMX393AUA+T 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 features 60µA per comparator supply current at 5V, 100mV output saturation voltage at 1mA sink, and input common-mode range extending to ground - used in battery-powered voltage monitoring and automotive sensor interface circuits.
For engineers reviewing the LMX393AUA+T datasheet, LMX393AUA+T pinout, LMX393AUA+T application, or LMX393AUA+T equivalent, key selection criteria include guaranteed hysteresis, rail-to-rail input capability, ultra-low quiescent current, and µMAX® package compatibility with space-constrained PCB layouts.
Technical Context
The LMX393AUA+T implements a dual-channel, CMOS-based comparator architecture with independent open-drain outputs, enabling wired-OR logic and flexible pull-up configuration. Its internal hysteresis eliminates oscillation on slow-moving or noisy inputs without external components.
It supports single-supply operation down to 1.8V while maintaining full functionality across the -40°C to +125°C range, with input bias current ≤ ±400nA and PSRR of 60–70dB - critical for stable performance in noisy automotive and portable power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - enables direct integration into Li-ion (3.0–3.7V), 3.3V, and 5V systems without level-shifting. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial environments. |
| Supply Current per Comparator | 60µA at VDD = 5.0V - supports multi-year battery life in always-on monitoring applications. |
| Input Offset Voltage | ≤9mV over full temperature range - ensures reliable threshold detection in precision sensing. |
| Output Saturation Voltage | 100mV at ISINK = 1mA - minimizes power loss and improves noise margin in low-voltage logic interfaces. |
| Hysteresis | 2mV (internal) - suppresses chatter on slow-slew signals like thermistor or potentiometer outputs. |
| Propagation Delay | 90ns typical (tPHL) at 100mV overdrive, 5V supply - suitable for medium-speed window comparators and zero-crossing detection. |
Pinout & Package
LMX393AUA+T is housed in an 8-pin µMAX® package (3.0mm × 3.0mm × 1.1mm), RoHS-compliant and lead-free, with exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Positive supply input - must be bypassed with 0.1µF capacitor to VSS for stability. |
| 2 | OUTA | Open-drain output of Comparator A - requires external pull-up to define high-level voltage and logic family compatibility. |
| 3 | INA− | Inverting input of Comparator A - accepts voltages from −0.1V to (VDD − 0.7V); no phase reversal on overdrive. |
| 4 | INA+ | Noninverting input of Comparator A - supports rail-to-rail common-mode range including ground reference. |
| 5 | VSS | Negative supply (GND) - shared return path for both comparators and bypass capacitor. |
| 6 | INB+ | Noninverting input of Comparator B - electrically isolated from INA+; enables independent dual-threshold sensing. |
| 7 | INB− | Inverting input of Comparator B - same input specifications as INA−; supports differential or single-ended configurations. |
| 8 | OUTB | Open-drain output of Comparator B - independently controllable; supports wired-OR with OUTA or separate loads. |
Key Features
| Feature | Design Value |
|---|---|
| Internal 2mV hysteresis | Eliminates need for external positive feedback resistors in noise-prone environments such as motor control feedback loops. |
| Rail-to-rail input common-mode range | Includes ground and extends to within 0.7V of VDD - enables direct interfacing with sensors and ADCs without level-shifting. |
| Low 60µA supply current per comparator | Reduces system-level power budget in always-on battery monitors and wake-up circuitry. |
| −40°C to +125°C guaranteed operation | Meets AEC-Q100 stress test requirements for automotive cabin and engine bay applications. |
| Open-drain outputs with 100mV saturation | Supports mixed-voltage logic interfacing (e.g., 3.3V comparator driving 5V microcontroller interrupt line). |
Applications
| Battery Voltage Monitor | Automotive Cabin Sensor Interface |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charging/discharging to trigger low-battery warning or cutoff. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel for upper threshold (4.2V), one for lower (3.0V). Use Value: Internal hysteresis prevents false triggering near thresholds; 1.8V minimum supply allows operation during deep discharge. |
Use Scenario: Interfacing NTC thermistors and potentiometers in HVAC or seat position sensing modules. IC Role / Device Role / Timing Role: Signal conditioning front-end - compares analog sensor outputs against fixed reference voltages. Use Value: Rail-to-rail input range accommodates 0–5V sensor spans; −40°C to +125°C rating ensures reliability across cabin temperature extremes. |
| Portable Device Power Sequencing | Industrial Threshold Alarm System |
Use Scenario: Enabling/sequencing power rails in handheld medical devices or PDAs based on supply readiness signals. IC Role / Device Role / Timing Role: Dual comparator acts as dual-power-good detector - each channel validates a different DC/DC output. Use Value: Low 60µA quiescent current minimizes standby power draw; open-drain outputs simplify OR-ing of multiple "power good" flags. |
Use Scenario: Detecting over-temperature or over-pressure conditions in programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: Fault comparator stage - compares conditioned analog inputs against safety-critical trip points. Use Value: Guaranteed 2mV hysteresis prevents nuisance alarms from sensor noise; 125°C rating supports operation near heat-generating components. |
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; wider 2.7–5.5V supply range; higher 100µA supply current. | Lacks built-in noise immunity - requires external hysteresis resistors for noisy environments. | Choose when cost sensitivity outweighs need for integrated hysteresis and lowest quiescent current. |
| TLV3702IDR | Higher 1.8–16V supply range; rail-to-rail output; 85µA supply current; no internal hysteresis. | Supports higher-voltage industrial rails but adds complexity for hysteresis implementation. | Prefer when system uses >5.5V supplies or requires push-pull output drive capability. |
Compared with LMX393AUA+T, LMV393IDR offers broader vendor availability but lacks hysteresis and consumes more current, while TLV3702IDR extends voltage range at the expense of added design overhead for noise suppression - making LMX393AUA+T optimal for compact, low-power, automotive-grade dual-threshold detection.
Availability
LMX393AUA+T is available at Aetrix Electronics and suitable for battery-powered electronics, automotive sensor interfaces, and portable device power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMX393AUA+T 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+T belongs to Maxim's LMX3xx family of tiny-pack comparators - engineered specifically for low-voltage, space-constrained, and temperature-robust sensing and monitoring systems.
FAQ
What is the maximum supply voltage rating for LMX393AUA+T?
The absolute maximum supply voltage (VDD to VSS) for LMX393AUA+T is +6V. Operation beyond this limit risks permanent damage. The recommended functional range is 1.8V to 5.5V, with full electrical specifications guaranteed across that span. Exceeding 5.5V may cause parametric degradation even if below the 6V absolute maximum.
Does LMX393AUA+T include internal hysteresis?
Yes, LMX393AUA+T includes 2mV of internal hysteresis - confirmed in the datasheet's Features section and DC Electrical Characteristics tables. This hysteresis is inherent to the "H" variant designation and provides noise immunity without external components, distinguishing it from non-H versions like LMV393.
What package type is used for LMX393AUA+T?
LMX393AUA+T is packaged in an 8-pin µMAX® package (3.0mm × 3.0mm × 1.1mm), identified by package code U8+1 in Maxim's documentation. It is RoHS-compliant, lead-free, and features an exposed thermal pad for enhanced heat dissipation in high-density layouts.
Can LMX393AUA+T operate with input voltages below ground?
Yes, LMX393AUA+T supports an input common-mode voltage range extending to −0.1V below VSS (ground), as specified in the DC Electrical Characteristics tables. This allows safe interfacing with slightly negative sensor offsets or transient undershoots without phase reversal or damage.
Is LMX393AUA+T pin-compatible with LMV393?
Yes, LMX393AUA+T is explicitly described as a drop-in, pin-for-pin-compatible replacement for LMV393 in the General Description. Both use identical 8-pin µMAX® pinouts and share matching terminal functions (VDD, OUTA, INA−, INA+, VSS, INB+, INB−, OUTB), enabling direct substitution without PCB modification.
LMX393AUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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 @ 5V
- Current - Output (Typ):
- 200µA
- Current - Quiescent (Max):
- 70dB PSRR
- CMRR, PSRR (Typ):
- 600ns
- Propagation Delay (Max):
- 2mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-uMAX/uSOP
LMX393AUA+T FAQ
1.How can I place an order for LMX393AUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LMX393AUA+T 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+T reliable?
The price and inventory of LMX393AUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMX393AUA+T is usually 5 days.
3.What payment methods are accepted for LMX393AUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMX393AUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMX393AUA+T?
LMX393AUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMX393AUA+T 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+T?
For technical support, including LMX393AUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMX393AUA+T requirements.
6.How does Aetrix verify that LMX393AUA+T is sourced from the original manufacturer or authorized distributors?
All LMX393AUA+T 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+T meets industry standards.
7.What is the process for return or replacement of LMX393AUA+T?
All LMX393AUA+T units undergo pre-shipment inspection (PSI). If there is an issue with LMX393AUA+T, 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+T part is unused and in its original packaging.
Return procedure for LMX393AUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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