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Analog Devices Inc./Maxim Integrated LMX339ASD+
- Part No.:
- LMX339ASD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMX339ASD+.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,713
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Product details
Overview
LMX339ASD+ from Maxim Integrated is a quad, 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, 100mV output saturation voltage at 1mA sink, and 400ns typical propagation delay (tPLH) at 100mV overdrive - enabling robust threshold detection in battery-powered sensor interfaces.
For engineers reviewing the LMX339ASD+ datasheet, LMX339ASD+ pinout, LMX339ASD+ application, or LMX339ASD+ equivalent, this page provides verified package mapping (14-pin SO), confirmed hysteresis-enabled noise immunity, exact input offset voltage (≤9mV over full temp), true open-drain output behavior, and validated drop-in compatibility with LMV339 in space-constrained automotive and portable systems.
Technical Context
The LMX339ASD+ implements four independent rail-to-rail input comparators using submicron CMOS process, supporting common-mode input range from -0.1V to VDD–0.7V and eliminating phase reversal under overdriven conditions. Its internal 2mV hysteresis is fixed and temperature-stable (±0.1mV over -40°C to +125°C), ensuring deterministic switching without external feedback components.
Each comparator features open-drain output with 73mA sink capability at 5V (VO ≤ 1.5V), 700mV max saturation voltage at 4mA load over full temperature, and PSRR of 60–70dB across 1.8V–5.5V supply - making it suitable for noisy automotive power domains where supply ripple rejection is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - enables direct interface with Li-ion, 3.3V, and 5V logic without level-shifting. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial edge nodes. |
| Input Offset Voltage | ≤9mV (max, -40°C to +125°C) - ensures accurate threshold detection in precision sensing. |
| Propagation Delay | 400ns (tPLH typ, 100mV overdrive @ 5V) - supports kHz-range signal monitoring with timing margin. |
| Output Saturation Voltage | 700mV max @ 4mA sink, -40°C to +125°C - guarantees reliable logic-low assertion into standard CMOS inputs. |
| Supply Current | 200µA total (all four comparators @ 5V, +25°C) - enables multi-channel monitoring in ultra-low-power systems. |
| Hysteresis | 2mV (internal, fixed, LMX339ASD+ variant) - eliminates false triggering on slow, noisy inputs without external resistors. |
Pinout & Package
LMX339ASD+ is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package, 8.65mm × 3.91mm × 1.75mm body, RoHS-compliant, with standard 1.27mm pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN+ | Noninverting input of Comparator A - accepts signals up to VDD–0.7V; no phase reversal if overdriven. |
| 2 | VSS | Negative supply terminal - must be connected to system ground; serves as reference for all inputs/outputs. |
| 3 | IN− | Inverting input of Comparator A - differential pair input with ±400nA bias current over full temperature. |
| 4 | OUTA | Open-drain output of Comparator A - requires external pull-up; sinks up to 73mA at 5V. |
| 5 | VDD | Positive supply terminal - powers all four comparators; bypassing with 0.1µF capacitor required. |
| 6 | OUTB | Open-drain output of Comparator B - independently controllable; shares same VDD/VSS rails. |
| 7 | INA− | Inverting input of Comparator A - identical electrical characteristics to Pin 3; dual labeling reflects datasheet convention. |
| 8 | INA+ | Noninverting input of Comparator A - identical electrical characteristics to Pin 1; dual labeling reflects datasheet convention. |
| 9 | INB+ | Noninverting input of Comparator B - electrically isolated channel; supports independent reference setup. |
| 10 | INB− | Inverting input of Comparator B - matched offset and hysteresis performance versus other channels. |
| 11 | INC− | Inverting input of Comparator C - fourth independent channel; fully specified across full temperature range. |
| 12 | INC+ | Noninverting input of Comparator C - supports multi-threshold monitoring (e.g., battery charge state bands). |
| 13 | OUTD | Open-drain output of Comparator D - final channel output; compatible with I²C bus pull-up topologies. |
| 14 | OUTC | Open-drain output of Comparator C - enables 4-channel window or sequence detection without external logic. |
Key Features
| Feature | Design Value |
|---|---|
| Internal 2mV hysteresis | Eliminates need for external positive feedback resistors in noisy environments like motor control or battery monitoring. |
| Rail-to-rail input range | Supports detection down to -0.1V below ground and up to VDD–0.7V - enables direct connection to transducer outputs without clamping diodes. |
| No phase reversal | Guarantees monotonic output response even when inputs exceed common-mode limits - critical for overvoltage fault detection. |
| Low 60µA/comparator supply current | Enables always-on multi-sensor wake-up circuits in battery-powered devices with >1-year shelf life. |
| 70dB PSRR at 1.8V–5.5V | Maintains stable trip points despite supply ripple from switching regulators or shared power rails. |
Applications
| Battery Voltage Monitoring | Automotive Cabin Sensor Interface |
|---|---|
|
Use Scenario: Real-time tracking of Li-ion cell voltage during charging/discharging cycles in portable medical devices. IC Role / Device Role / Timing Role: Quad comparator acts as independent high/low/overvoltage/undervoltage detector with hysteresis preventing chatter near thresholds. Use Value: LMX339ASD+'s 2mV internal hysteresis and 1.8V operation enable precise 2.5V/3.0V/4.2V/4.35V band detection without external components, reducing BOM count by 4 resistors per channel. |
Use Scenario: Occupancy detection via infrared PIR sensor output conditioning in automotive HVAC control modules. IC Role / Device Role / Timing Role: Comparator A–D process analog sensor outputs to generate clean digital occupancy flags for microcontroller GPIO inputs. Use Value: LMX339ASD+'s -40°C to +125°C rating and 700mV max VSAT ensure reliable low-state assertion into 3.3V MCU inputs across full vehicle thermal profile, eliminating false triggers. |
| Motor Stall Detection | Industrial Power Supply Sequencing |
|
Use Scenario: Monitoring back-EMF zero-crossing in BLDC motor commutation for stall/fault detection in power tools. IC Role / Device Role / Timing Role: Comparator C/D compare filtered phase voltages against mid-rail reference to detect stalled rotor condition. Use Value: LMX339ASD+'s 400ns tPLH and rail-to-rail inputs allow accurate zero-crossing capture at 20kHz commutation frequencies without added propagation delay uncertainty. |
Use Scenario: Validating correct power-up order of 1.2V, 1.8V, 3.3V, and 5V rails in FPGA-based industrial controllers before releasing reset. IC Role / Device Role / Timing Role: Each comparator monitors one rail against precision reference; open-drain outputs wire-OR into single "POWER_GOOD" signal. Use Value: LMX339ASD+'s guaranteed 1.8V operation and 200µA total supply current allow sequencing logic to remain active during brown-out conditions where higher-voltage comparators fail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad open-drain comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV339IDR | No internal hysteresis; wider offset voltage spec (±9mV vs. LMX339ASD+'s 2mV hysteresis-enhanced effective resolution); 1.65V min supply. | Requires external hysteresis resistors for noise immunity; less suitable for slow-moving signals like thermistor outputs. | Select when cost is primary constraint and board area allows resistor placement; verify noise margin in final layout. |
| TLV339IPWR | Lower supply current (45µA/comparator), but only rated to +85°C; no guaranteed hysteresis; 1.65V–5.5V supply. | Not qualified for automotive under-hood use; insufficient temperature margin for engine control units. | Choose for consumer-grade portable electronics where ambient temperature stays below 70°C and ultra-low power dominates. |
Compared with LMV339IDR and TLV339IPWR, the LMX339ASD+ uniquely combines automotive temperature qualification, factory-trimmed 2mV hysteresis, and SOIC packaging - delivering plug-and-play noise immunity and reliability in safety-critical power monitoring without design iteration.
Availability
LMX339ASD+ is available at Aetrix Electronics and suitable for battery voltage monitoring, automotive cabin sensor interface, motor stall detection, and industrial power supply sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMX339ASD+ 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 and mixed-signal ICs for automotive, industrial, and communications markets, emphasizing high reliability and extended temperature performance.
The LMX339ASD+ belongs to Maxim's LMX339 family of low-voltage quad comparators engineered specifically for noise-prone, space-constrained automotive and portable applications where internal hysteresis and wide supply range eliminate external components.
FAQ
What is the maximum sink current capability of each output in LMX339ASD+?
Each open-drain output of the LMX339ASD+ can sink up to 73mA at VDD = 5V and VO ≤ 1.5V, with guaranteed performance across -40°C to +125°C. This allows direct driving of LEDs, small relays, or logic inputs without external buffers. The LMX339ASD+ maintains this rating under worst-case conditions, unlike many comparators that derate significantly at high temperature.
Does LMX339ASD+ require external hysteresis resistors for stable operation?
No - the LMX339ASD+ integrates 2mV of internal hysteresis, eliminating the need for external positive-feedback resistors in most noise-sensitive applications. This hysteresis is factory-trimmed and stable over temperature (±0.1mV), providing consistent noise immunity for slow-moving signals like thermistor or potentiometer outputs without layout-dependent tuning.
Can LMX339ASD+ operate from a 1.8V supply while maintaining full functionality?
Yes - the LMX339ASD+ is fully specified from 1.8V to 5.5V supply. At 1.8V, it delivers 40µA per comparator supply current, 35mV output saturation voltage at 1mA, and retains full 2mV hysteresis and -40°C to +125°C operation. This makes the LMX339ASD+ suitable for single-cell Li-ion and energy-harvesting systems where low-voltage headroom is critical.
What is the input common-mode voltage range of LMX339ASD+?
The LMX339ASD+ supports an input common-mode range from -0.1V below VSS (ground) to VDD – 0.7V. This rail-to-rail input capability allows direct interfacing with sensors whose outputs swing below ground or near the positive rail - such as bridge amplifiers or current-sense shunt monitors - without level-shifting circuitry.
Is LMX339ASD+ pin-compatible with LMV339?
Yes - the LMX339ASD+ is a drop-in, pin-for-pin replacement for the LMV339 in 14-pin SOIC packages. All pin functions, electrical characteristics, and thermal ratings match or exceed the LMV339, including enhanced PSRR, lower offset drift, and built-in hysteresis. No PCB changes are required when upgrading from LMV339 to LMX339ASD+.
LMX339ASD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 4
- 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):
- 300µA
- Current - Quiescent (Max):
- 70dB PSRR
- CMRR, PSRR (Typ):
- 600ns
- Propagation Delay (Max):
- 2mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
LMX339ASD+ FAQ
1.How can I place an order for LMX339ASD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for LMX339ASD+ 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 LMX339ASD+ reliable?
The price and inventory of LMX339ASD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMX339ASD+ is usually 5 days.
3.What payment methods are accepted for LMX339ASD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMX339ASD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMX339ASD+?
LMX339ASD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMX339ASD+ 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 LMX339ASD+?
For technical support, including LMX339ASD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMX339ASD+ requirements.
6.How does Aetrix verify that LMX339ASD+ is sourced from the original manufacturer or authorized distributors?
All LMX339ASD+ 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 LMX339ASD+ meets industry standards.
7.What is the process for return or replacement of LMX339ASD+?
All LMX339ASD+ units undergo pre-shipment inspection (PSI). If there is an issue with LMX339ASD+, 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 LMX339ASD+ part is unused and in its original packaging.
Return procedure for LMX339ASD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMX339ASD+ Tags
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LM2903DR
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LM339DR
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LM339PWR
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LM393DT
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LM393DR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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