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Texas Instruments LM393MX/NOPB
- Part No.:
- LM393MX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM393MX/NOPB.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,877
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Product details
Overview
LM393MX/NOPB from Texas Instruments is a dual, low-power, precision voltage comparator IC with open-collector outputs, designed for single-supply operation from 2.0 V to 36 V. It features ±3 mV maximum input offset voltage, 0.4 mA supply current at 5 V, and input common-mode range extending to ground - enabling direct sensing of signals near 0 V in battery-powered and industrial systems.
For engineers reviewing the LM393MX/NOPB datasheet, LM393MX/NOPB pinout, LM393MX/NOPB application, or LM393MX/NOPB equivalent, this page delivers verified electrical specs, SOIC-8 package details, real-world use cases in level detection and oscillator circuits, and two validated alternative comparators with documented functional trade-offs.
Technical Context
The LM393MX/NOPB integrates two independent PNP-input comparators with rail-to-rail input capability down to ground and differential input voltage tolerance up to ±36 V. Its open-collector NPN output stage supports TTL/CMOS/MOS logic interfacing and wired-OR configurations.
It operates across 0°C to +70°C ambient temperature, draws supply current independent of V+, and maintains stable performance with input bias current as low as 25 nA and input offset current ≤±5 nA - critical for high-impedance sensor interfaces and precision threshold detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 36 V single supply (or ±1.0 V to ±18 V dual supply) - enables direct integration into 3.3 V, 5 V, 12 V, and 24 V systems without level-shifting. |
| Input Offset Voltage | ±3 mV max at 25°C - ensures accurate threshold detection within ±0.1% error for 3 V reference signals. |
| Supply Current | 0.4 mA typical at 5 V - supports multi-year battery life in portable equipment with minimal quiescent power impact. |
| Input Bias Current | 25 nA typical - permits use with high-impedance sources (e.g., thermistors, photodiodes) without significant signal loading. |
| Output Saturation Voltage | 250 mV at 4 mA sink - guarantees reliable LOW-level logic assertion even under moderate load conditions. |
| Input Common-Mode Range | Includes ground (0 V) up to V+−1.5 V - allows direct comparison of signals referenced to system ground in single-supply designs. |
| Response Time | 1.3 μs typical (100 mV step, 5 mV overdrive) - suitable for medium-speed applications like motor stall detection and power supply sequencing. |
Pinout & Package
LM393MX/NOPB is housed in an 8-pin SOIC package (4.90 mm × 3.91 mm body size), optimized for automated assembly and thermal performance in industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUTA (Pin 1) | Open-collector output, Channel A | Sinks current to ground when A-input condition is met; requires external pull-up for HIGH state - enables logic-level translation and wired-OR bus operation. |
| –INA (Pin 2) | Inverting input, Channel A | Accepts reference or threshold voltage; input bias current flows *out* of pin due to PNP front-end - must be driven by low-impedance source or buffered for stability. |
| +INA (Pin 3) | Non-inverting input, Channel A | Accepts sensed signal; same bias behavior as –INA - used for active-high trigger configurations (e.g., overvoltage detection). |
| GND (Pin 4) | Ground reference | Common return path for both comparators and internal bias network - must be low-impedance to avoid offset drift and noise coupling. |
| +INB (Pin 5) | Non-inverting input, Channel B | Independent signal input for second comparator - supports dual-threshold functions such as window detection or hysteresis feedback. |
| –INB (Pin 6) | Inverting input, Channel B | Independent reference input for second comparator - enables complementary logic (e.g., undervoltage + overvoltage monitoring). |
| OUTB (Pin 7) | Open-collector output, Channel B | Functionally identical to OUTA - allows independent control of two digital outputs or OR-ing with OUTA via shared pull-up. |
| V+ (Pin 8) | Positive supply rail | Power input for both comparators; supplies internal bias circuitry - tolerant of 36 V max, enabling direct connection to unregulated rails. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation with ground-sensing inputs | Eliminates need for negative supply in level-shifted sensor interfaces - simplifies power architecture in cost-sensitive embedded systems. |
| Low 0.4 mA supply current at 5 V | Reduces system-level power budget by >90% vs. legacy comparators - critical for always-on IoT nodes and energy-harvesting devices. |
| 25 nA input bias current | Minimizes voltage error across 1 MΩ source impedances (<25 mV drop) - preserves accuracy in precision thermistor or strain gauge bridges. |
| Open-collector outputs compatible with TTL/CMOS/MOS | Enables flexible logic interfacing without level translators - supports mixed-voltage systems (e.g., 3.3 V logic driving 5 V peripherals). |
| Differential input voltage range = supply voltage | Allows inputs to swing beyond V+ (up to +36 V) without damage - ideal for automotive battery monitoring and industrial HV sensing front-ends. |
Applications
| Battery Voltage Monitor | Industrial Limit Detector |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles in portable medical devices. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel triggers low-voltage shutdown, the other prevents overcharge. Use Value: ±3 mV offset ensures ±0.1% threshold accuracy at 3.3 V, while 0.4 mA supply current extends runtime between charges. |
Use Scenario: Detecting out-of-tolerance pressure transducer output in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Precision threshold comparator comparing analog sensor output against programmable reference voltages. Use Value: Input common-mode range including ground allows direct connection to ratiometric sensors powered from same 5 V rail - no level-shifting required. |
| Zero-Crossing Detector | Simple Oscillator Generator |
Use Scenario: AC line synchronization in smart home dimmer controllers using mains-derived signal. IC Role / Device Role / Timing Role: Single comparator with hysteresis detecting polarity transitions of rectified AC waveform. Use Value: 25 nA input bias avoids loading transformer-coupled inputs; open-collector output drives optocoupler LED directly with 5 V pull-up. |
Use Scenario: Generating clock signals for low-cost microcontroller peripherals in consumer appliances. IC Role / Device Role / Timing Role: Dual comparator configured as astable multivibrator - one section provides timing ramp, the other triggers reset. Use Value: 1.3 μs response time enables stable squarewave generation up to ~300 kHz; SOIC-8 footprint supports compact PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual open-collector comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Same electrical specs and SOIC-8 package; differs only in tape-and-reel packaging (DR = reel, MX = cut tape). | No functional difference - identical performance, pinout, and thermal characteristics. | Select LM393DR for high-volume automated assembly; LM393MX/NOPB preferred for prototyping and low-quantity production. |
| TLV3702IDR | Lower 85 µA supply current, rail-to-rail input, but 36 V max supply and ±1.5 mV offset - higher precision, lower power, but not drop-in compatible due to different pinout and push-pull output. | Requires PCB redesign and logic interface adjustment - unsuitable for direct replacement where open-collector wiring or SOIC-8 footprint is fixed. | Choose TLV3702IDR only when upgrading for ultra-low power or improved DC accuracy; retain LM393MX/NOPB for legacy compatibility and cost-sensitive designs. |
Compared with LM393DR, LM393MX/NOPB offers identical functionality in cut-tape form for flexibility; versus TLV3702IDR, it trades higher quiescent current and offset for proven SOIC-8 pin compatibility, open-collector simplicity, and broader voltage tolerance - making it the robust choice for industrial and automotive auxiliary circuits.
Availability
LM393MX/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial limit detection, zero-crossing sensing, and oscillator generation requiring stable component supply across extended product lifecycles.
Supply support for LM393MX/NOPB 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
Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions, with over 50 years of innovation in precision analog ICs and broad industrial portfolio support.
The LM393MX/NOPB belongs to TI's legacy precision comparator family, engineered for reliability in cost-sensitive, wide-voltage industrial and consumer applications - emphasizing single-supply usability, ground-sensing capability, and robust ESD tolerance.
FAQ
What is the operating temperature range for LM393MX/NOPB?
The LM393MX/NOPB is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade range aligns with its intended use in non-aerospace, non-military applications such as consumer electronics and general industrial controls. The LM393MX/NOPB datasheet explicitly defines this range in Section 6.3 (Recommended Operating Conditions), and thermal derating is not required within these limits.
Does LM393MX/NOPB support dual-supply operation?
Yes, LM393MX/NOPB supports dual-supply operation with ±1.0 V to ±18 V. When used in split-supply mode, Pin 4 (GND) serves as the reference node, and the input common-mode range remains symmetric around ground. The LM393MX/NOPB maintains its 0.4 mA supply current and ±3 mV offset specifications under dual-supply conditions, as confirmed in the Electrical Characteristics tables (Section 6.7).
Can LM393MX/NOPB drive a 10 kΩ pull-up resistor to 5 V?
Yes, LM393MX/NOPB can reliably sink current through a 10 kΩ pull-up to 5 V. With 5 V applied, the resulting current is 0.5 mA - well below the 6 mA minimum sink capability specified in the datasheet. The output saturation voltage remains ≤400 mV under this load, ensuring clean TTL-compatible LOW-level signaling. This configuration is validated in Figure 15 ("Driving CMOS") and Section 8.2.1 of the LM393MX/NOPB datasheet.
Is LM393MX/NOPB pin-compatible with LM2903?
Yes, LM393MX/NOPB is pin-compatible with LM2903 in SOIC-8 packages - both share identical pin numbering, function mapping, and footprint. However, LM2903 is rated for −40°C to +85°C operation and exhibits slightly higher input offset voltage (±7 mV max), while LM393MX/NOPB is limited to 0°C to +70°C with ±3 mV max offset. Electrical compatibility is maintained per TI's cross-reference documentation.
What is the maximum input voltage allowed on LM393MX/NOPB pins?
The absolute maximum input voltage for LM393MX/NOPB is −0.3 V to +36 V relative to GND, regardless of supply voltage. Inputs may safely exceed V+ (e.g., 36 V on an input while V+ = 5 V), provided the opposite input stays within the common-mode range (0 V to V+−1.5 V). This rating is defined in Section 6.1 (Absolute Maximum Ratings) and enables direct high-side sensing in automotive and industrial applications.
LM393MX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 5mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 16mA @ 5V
- Current - Output (Typ):
- 2.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 700ns
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM393MX/NOPB FAQ
1.How can I place an order for LM393MX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393MX/NOPB 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 LM393MX/NOPB reliable?
The price and inventory of LM393MX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393MX/NOPB is usually 5 days.
3.What payment methods are accepted for LM393MX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393MX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393MX/NOPB?
LM393MX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393MX/NOPB 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 LM393MX/NOPB?
For technical support, including LM393MX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393MX/NOPB requirements.
6.How does Aetrix verify that LM393MX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM393MX/NOPB 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 LM393MX/NOPB meets industry standards.
7.What is the process for return or replacement of LM393MX/NOPB?
All LM393MX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM393MX/NOPB, 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 LM393MX/NOPB part is unused and in its original packaging.
Return procedure for LM393MX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM393MX/NOPB 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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LM2901PWR
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LM2903DT
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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