My Inquiry
My Account
Analog Devices Inc./Maxim Integrated LMX393HAUA+T
- Part No.:
- LMX393HAUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMX393HAUA+T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,613
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The LMX393HAUA+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 - enabling precise threshold detection in battery-powered sensor interfaces and power monitoring circuits.
For engineers reviewing the LMX393HAUA+T datasheet, LMX393HAUA+T pinout, LMX393HAUA+T application, or LMX393HAUA+T equivalent, this device is selected for noise-immune level sensing in automotive body control modules, portable equipment voltage supervisors, and low-power analog front-ends where slow-moving signals and EMI-prone environments demand stable switching behavior without external hysteresis components.
Technical Context
The LMX393HAUA+T implements a rail-to-rail input CMOS comparator core with open-drain NMOS output stage, supporting single-supply operation down to 1.8V while maintaining guaranteed performance across full automotive temperature range. Its internal hysteresis is fixed at 2mV and temperature-stable (±0.1mV over -40°C to +125°C), eliminating need for external positive feedback networks in noisy signal conditioning paths.
Designed in submicron CMOS, it achieves 90ns propagation delay (tPHL) at 100mV overdrive and 5V supply, with PSRR of 70dB and CMRR >60dB - outperforming legacy bipolar comparators in supply noise rejection and input offset stability under varying load and thermal conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - supports direct connection to Li-ion battery (3.0–4.2V), 3.3V logic rails, and 5V legacy systems without level shifting. |
| Input Offset Voltage | ≤9mV max at -40°C to +125°C - ensures ≤9mV trip-point uncertainty in precision voltage window detection. |
| Output Saturation Voltage | 100mV at 1mA sink - enables low-dropout pull-down into 3.3V or 5V logic inputs with minimal voltage headroom loss. |
| Supply Current | 120µA typical at 5V (both comparators active) - allows continuous operation in always-on battery monitors with <1-year coin-cell lifetime. |
| Hysteresis | 2mV internal - prevents chatter on slowly ramping signals (e.g., thermistor outputs, battery charge curves) without external resistors. |
| Propagation Delay | 90ns tPHL / 200ns tPLH at 100mV overdrive and 5V - sufficient for <1MHz digital signal edge detection and PWM fault monitoring. |
| Input Common-Mode Range | Includes ground (VSS) to VDD – 0.7V - permits direct sensing of 0V-referenced sensors (e.g., current-sense amps, shunt monitors). |
Pinout & Package
LMX393HAUA+T is housed in an 8-pin µMAX® package (3.0mm × 3.0mm × 1.1mm, 0.65mm pitch), compatible with high-density PCB layouts and reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Open-drain output of Comparator A - requires external pull-up to define logic-high level; sinks up to 140mA at 5V. |
| 2 | INA− | Inverting input of Comparator A - accepts signals from 0V to VDD − 0.7V; no phase reversal when overdriven. |
| 3 | INA+ | Noninverting input of Comparator A - same voltage range as INA−; used for reference or signal routing in differential sensing. |
| 4 | VSS | Negative supply terminal - must be connected to system ground; serves as return path for both comparators and internal bias. |
| 5 | VDD | Positive supply terminal - powers both comparators and internal hysteresis circuitry; bypass with 0.1µF capacitor. |
| 6 | INB+ | Noninverting input of Comparator B - independent channel for dual-threshold or window-comparator configurations. |
| 7 | INB− | Inverting input of Comparator B - electrically isolated from Channel A; supports separate signal sources. |
| 8 | OUTB | Open-drain output of Comparator B - independently controllable; enables OR'ed fault outputs or redundant sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Internal 2mV hysteresis | Eliminates need for external resistor network in noise-sensitive applications like automotive door latch status or battery SOC estimation. |
| -40°C to +125°C operation | Qualified for under-hood automotive use and industrial temperature cycling without derating or external thermal compensation. |
| Input range includes ground | Enables direct interface with ground-referenced transducers (e.g., pressure sensors, Hall-effect switches) without level-shifting circuitry. |
| Low 60µA/comparator supply current | Reduces quiescent power in always-on systems - e.g., 120µA total for dual-channel monitoring in IoT node sleep mode. |
| No phase reversal on overdrive | Prevents false triggering when input pins exceed supply rails by up to 0.3V - critical for robustness in transient-heavy environments. |
Applications
| Battery Voltage Supervisor | Automotive Door Position Sensing |
|---|---|
|
Use Scenario: Monitoring lithium-ion cell voltage during charging/discharging to trigger low-battery warning and overvoltage cutoff. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel for undervoltage lockout (UVLO), one for overvoltage protection (OVP). Use Value: Internal hysteresis prevents oscillation near threshold crossings; rail-to-rail input allows direct connection to cell stack without divider scaling. |
Use Scenario: Detecting magnetic reed switch closure in vehicle door latch assemblies to enable anti-pinch or interior lighting control. IC Role / Device Role / Timing Role: Single comparator channel comparing reed switch output against stable reference to generate clean digital latch signal. Use Value: 2mV hysteresis rejects EMI from nearby motors or RF modules; -40°C to +125°C rating ensures reliability in extreme cabin temperatures. |
| Portable Equipment Power Sequencing | Industrial Sensor Signal Conditioning |
|
Use Scenario: Enabling sequential power-up of microcontroller, display, and radio subsystems based on regulated rail voltages. IC Role / Device Role / Timing Role: Dual comparator monitoring 3.3V and 1.8V rails - outputs drive enable pins of downstream DC/DC converters via pull-up resistors. Use Value: Open-drain outputs allow wired-OR configuration for multi-rail sequencing; 1.8V minimum supply supports direct use with ultra-low-voltage regulators. |
Use Scenario: Converting analog output from RTD or thermistor into digital on/off signal for HVAC fan speed control or motor thermal shutdown. IC Role / Device Role / Timing Role: Comparator with precision reference input detecting temperature thresholds - hysteresis prevents chatter during slow thermal drift. Use Value: Input common-mode range including ground allows direct connection to 2-wire sensor bridges; low supply current extends battery life in wireless sensor nodes. |
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 125µA/comparator supply current. | Requires external hysteresis resistors for noise immunity; less suitable for slow-moving sensor signals without added components. | Select when cost sensitivity outweighs hysteresis convenience and board space is available for external feedback network. |
| TLV3702IDR | Push-pull output (not open-drain); rail-to-rail input/output; lower 55µA/comparator supply current; no internal hysteresis. | Cannot perform wired-OR logic or interface directly with I²C/SMBus pull-up domains; needs level translation for mixed-voltage systems. | Select when driving capacitive loads or high-speed digital inputs where rise/fall time symmetry matters more than open-drain flexibility. |
Compared with LMX393HAUA+T, LMV393IDR lacks integrated hysteresis and demands external components for noise immunity, while TLV3702IDR offers superior speed and power efficiency but sacrifices open-drain compatibility required for shared-bus signaling and flexible logic-level interfacing.
Availability
LMX393HAUA+T is available at Aetrix Electronics and suitable for automotive body electronics, portable medical devices, and industrial sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMX393HAUA+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 automotive, industrial, and communications markets, emphasizing high reliability and extended temperature performance.
The LMX393HAUA+T belongs to Maxim's LMX3xx family of tiny-pack comparators, engineered specifically for low-voltage, noise-immune threshold detection in space-constrained and thermally demanding applications such as automotive ECUs and portable instrumentation.
FAQ
What is the maximum supply voltage rating for the LMX393HAUA+T?
The LMX393HAUA+T has an absolute maximum supply voltage of +6V between VDD and VSS. However, its guaranteed operational range is 1.8V to 5.5V. Operating above 5.5V may cause parametric degradation or permanent damage, and is not supported by characterization data or qualification testing.
Does the LMX393HAUA+T require external hysteresis components?
No - the LMX393HAUA+T integrates 2mV of internal hysteresis, eliminating the need for external resistors in most noise-immune threshold detection applications. This feature is inherent to the "H" variant and is factory-trimmed; no user configuration is required to activate it.
Can the LMX393HAUA+T drive a standard 5V TTL input directly?
Yes, when used with an external pull-up resistor to 5V, the LMX393HAUA+T's open-drain OUTA and OUTB outputs can interface directly with 5V TTL inputs. The output saturation voltage remains ≤100mV at 1mA sink, ensuring valid LOW-level recognition, and the 140mA sink capability exceeds TTL input current requirements.
Is the LMX393HAUA+T pin-compatible with the standard LMX393AUA+T?
Yes - the LMX393HAUA+T is pin-for-pin compatible with the LMX393AUA+T and functions identically in all electrical and mechanical respects, except that the "H" variant adds internal hysteresis. No PCB layout changes are needed when upgrading from non-hysteresis to hysteresis version.
What is the input common-mode voltage range of the LMX393HAUA+T?
The LMX393HAUA+T supports an input common-mode voltage range from VSS (ground) to VDD – 0.7V. At 5V supply, this spans 0V to 4.3V; at 1.8V supply, it covers 0V to 1.1V - enabling direct interface with ground-referenced sensors and low-voltage references without level-shifting circuitry.
LMX393HAUA+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
LMX393HAUA+T FAQ
1.How can I place an order for LMX393HAUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LMX393HAUA+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 LMX393HAUA+T reliable?
The price and inventory of LMX393HAUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMX393HAUA+T is usually 5 days.
3.What payment methods are accepted for LMX393HAUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMX393HAUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMX393HAUA+T?
LMX393HAUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMX393HAUA+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 LMX393HAUA+T?
For technical support, including LMX393HAUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMX393HAUA+T requirements.
6.How does Aetrix verify that LMX393HAUA+T is sourced from the original manufacturer or authorized distributors?
All LMX393HAUA+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 LMX393HAUA+T meets industry standards.
7.What is the process for return or replacement of LMX393HAUA+T?
All LMX393HAUA+T units undergo pre-shipment inspection (PSI). If there is an issue with LMX393HAUA+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 LMX393HAUA+T part is unused and in its original packaging.
Return procedure for LMX393HAUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMX393HAUA+T 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…
