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Texas Instruments LM393TLX/NOPB
- Part No.:
- LM393TLX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-WFBGA, DSBGA
- Datasheet:
-
LM393TLX/NOPB.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:5,605
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Product details
Overview
LM393TLX/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, 25 nA input bias current, and input common-mode range extending to ground - enabling direct sensing of near-ground signals in battery-powered and industrial systems.
For engineers reviewing the LM393TLX/NOPB datasheet, LM393TLX/NOPB pinout, LM393TLX/NOPB application, or LM393TLX/NOPB equivalent, key selection considerations include its rail-to-rail input capability with ground-sensing, TTL/CMOS-compatible output drive, low quiescent current for energy-constrained designs, and SOIC-8 packaging suitable for automated assembly and thermal performance up to 70°C ambient.
Technical Context
The LM393TLX/NOPB integrates two independent high-gain comparators with PNP input stages, enabling input common-mode voltage down to 0 V (ground) even on single supply. Its open-collector NPN output transistors support wired-OR logic and flexible pull-up to any compatible voltage ≤36 V, independent of V+.
It operates across −40°C to +85°C (LM2903-grade spec), but LM393TLX/NOPB is rated for 0°C to +70°C per TI's official ordering information. Electrical characteristics-including 250 mV saturation voltage at 4 mA sink, 300 ns large-signal response time, and 36 V differential input tolerance-are validated at 25°C with V+ = 5 V and confirmed for the LM393-N variant group.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 36 V single supply; ±1.0 V to ±18 V dual supply - supports wide-input industrial and automotive power rails. |
| Input Offset Voltage | ±3 mV max - enables accurate threshold detection without trimming in cost-sensitive applications. |
| Supply Current | 0.4 mA typical at 5 V - allows multi-year operation on coin-cell batteries in portable sensors and monitors. |
| Input Bias Current | 25 nA typical - permits use with high-impedance sources (e.g., thermistors, photodiodes) without signal loading. |
| Output Sink Current | 16 mA max - drives LEDs, relays, or logic inputs directly without external buffers. |
| Input Common-Mode Range | 0 V to (V+ − 1.5 V) - allows direct comparison of signals referenced to ground, eliminating level-shifting circuitry. |
| Response Time | 300 ns (large-signal) - supports fast edge detection in pulse-width modulation and timing circuits. |
Pinout & Package
LM393TLX/NOPB is housed in an 8-pin SOIC package (4.90 mm × 3.91 mm body size), optimized for surface-mount reflow assembly and thermal dissipation up to 510 mW.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUTA (Pin 1) | Open-collector output, Channel A | Sinks current when A-input condition is met; requires external pull-up for logic HIGH; enables wired-OR with other comparators. |
| –INA (Pin 2) | Inverting input, Channel A | Accepts reference or threshold voltage; input bias current flows *out* of pin due to PNP stage. |
| +INA (Pin 3) | Non-inverting input, Channel A | Accepts sensed signal; common-mode range includes ground, enabling direct low-side monitoring. |
| GND (Pin 4) | Ground reference | Return path for both comparators and output transistors; serves as V– in single-supply configurations. |
| +INB (Pin 5) | Non-inverting input, Channel B | Independent second channel input; identical electrical specs to +INA; supports dual-threshold or window detection. |
| –INB (Pin 6) | Inverting input, Channel B | Second channel reference input; decoupled from Channel A - no crosstalk in layout. |
| OUTB (Pin 7) | Open-collector output, Channel B | Independent output with same sink capability and interface flexibility as OUTA. |
| V+ (Pin 8) | Positive supply | Power rail for both comparators and outputs; tolerant of 36 V transients; supplies internal bias network. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply ground-sensing input | Enables direct comparison of 0 V–referenced signals (e.g., battery voltage monitoring, current shunt sensing) without negative rail or level shifters. |
| Open-collector outputs | Supports mixed-voltage interfacing (e.g., 3.3 V logic pull-up with 5 V V+), wired-OR logic, and direct LED/relay driving with single external resistor. |
| Low 0.4 mA supply current | Reduces system power budget in always-on applications such as smoke detectors, IoT edge nodes, and portable instrumentation. |
| 25 nA input bias current | Minimizes error in high-impedance sensor interfaces (e.g., pH electrodes, capacitive touch, RTD bridges) without requiring guard traces or active buffering. |
| 36 V differential input tolerance | Allows safe comparison of signals exceeding V+, such as motor phase voltages or AC line-derived references, without external clamping diodes. |
Applications
| Battery Voltage Monitor | Industrial Threshold Detector |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charging/discharging to trigger under-voltage lockout or over-voltage protection. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel compares against low threshold (e.g., 2.8 V), the other against high threshold (e.g., 4.25 V). Use Value: Eliminates need for microcontroller ADC polling; provides immediate, deterministic response with <300 ns latency and zero firmware overhead. |
Use Scenario: Detecting coolant temperature exceedance in HVAC control panels using a thermistor-based voltage divider. IC Role / Device Role / Timing Role: Single comparator comparing thermistor output to fixed reference; output drives optocoupler isolating PLC input. Use Value: Ground-referenced input accepts thermistor signal directly; 0.4 mA supply current reduces heat buildup in sealed enclosures. |
| LED Status Indicator Driver | Zero-Crossing Detector (AC Mains) |
Use Scenario: Driving status LEDs on embedded control boards where brightness must scale with supply voltage (e.g., 3.3 V or 5 V logic). IC Role / Device Role / Timing Role: Comparator output sinks LED current directly via open-collector configuration; pull-up tied to same rail as LED anode. Use Value: No current-limiting resistor needed between output and LED cathode - simplifies BOM and improves efficiency at low VLED. |
Use Scenario: Generating clean digital zero-crossing pulses from 120/230 VAC mains for phase-controlled dimmers or energy meters. IC Role / Device Role / Timing Role: One comparator channel biased to detect AC crossing through 0 V using resistive divider and capacitor coupling. Use Value: Input common-mode range including ground allows direct connection to split-divider midpoint; 36 V input tolerance handles peak AC voltages safely. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903DT | Same SOIC-8 package; wider operating temperature (−40°C to +85°C); 7 mV max offset vs. 3 mV for LM393TLX/NOPB. | Better suited for automotive under-hood or outdoor industrial environments requiring extended temp range. | Select LM2903DT when ambient exceeds 70°C or long-term stability over temperature is critical; LM393TLX/NOPB remains optimal for cost-sensitive commercial-grade designs. |
| TLV3702IDR | Rail-to-rail input/output; 1.8 V min supply; 1.5 mV max offset; 85 μA supply current - significantly lower power but lower drive (4 mA sink). | Ideal for ultra-low-power battery devices (e.g., wearables, remote sensors) where 16 mA sink is unnecessary. | Choose TLV3702IDR only when sub-100 μA supply current is mandatory and output drive requirements are ≤4 mA; LM393TLX/NOPB retains advantage in legacy 5 V/12 V systems and higher-current loads. |
Compared with LM2903DT and TLV3702IDR, LM393TLX/NOPB delivers the best balance of ground-sensing capability, 16 mA output drive, and proven robustness in 5–36 V industrial power domains - making it the preferred choice for cost-optimized, medium-speed analog-digital interface tasks where full rail-to-rail I/O is not required.
Availability
LM393TLX/NOPB is available at Aetrix Electronics and suitable for battery-powered instruments, industrial control panels, and consumer appliance safety interlocks requiring stable component supply and long-lifecycle availability.
Supply support for LM393TLX/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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision signal conditioning and power-efficient IC design.
The LM393TLX/NOPB belongs to TI's legacy precision comparator family, engineered for reliability in cost-sensitive industrial, automotive, and consumer applications where ground-referenced sensing and robust open-collector interfacing are essential.
FAQ
What is the operating temperature range for LM393TLX/NOPB?
The LM393TLX/NOPB is specified for operation from 0°C to +70°C ambient temperature, consistent with the LM393-N grade per TI's official datasheet SNOSBJ6G. This distinguishes it from the LM2903-N (−40°C to +85°C) and LM193-N (−55°C to +125°C). For designs requiring extended temperature performance, LM2903DT is a validated alternative.
Does LM393TLX/NOPB support dual-supply operation?
Yes, LM393TLX/NOPB supports dual-supply operation with ±1.0 V to ±18 V ratings. When used in dual-supply mode, Pin 4 (GND) serves as the reference node, and the input common-mode range extends symmetrically around GND. The device maintains its 25 nA input bias current and ±3 mV offset specifications under dual-supply conditions.
Can LM393TLX/NOPB outputs be wired together?
Yes - the open-collector outputs of LM393TLX/NOPB (OUTA and OUTB) can be externally wired together with a shared pull-up resistor to implement wired-OR logic. This is commonly used in window comparators or fault-aggregation circuits. Ensure total sink current does not exceed 16 mA per output transistor to maintain 250 mV saturation voltage.
What is the maximum input voltage allowed at LM393TLX/NOPB pins?
The absolute maximum input voltage for LM393TLX/NOPB is −0.3 V to +36 V relative to GND, regardless of V+ level. Inputs may safely exceed V+ (e.g., 30 V input with 5 V supply), but must not go below −0.3 V to avoid forward-biasing internal ESD diodes. For negative-going signals, external clamping is recommended.
Is LM393TLX/NOPB RoHS compliant and lead-free?
Yes, LM393TLX/NOPB is RoHS compliant and lead-free, as indicated by the "/NOPB" suffix in the part number (TI's designation for lead-free, RoHS-compliant packaging). It meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for standard reflow soldering profiles per IPC/JEDEC J-STD-020.
LM393TLX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-WFBGA, DSBGA
- 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-DSBGA
LM393TLX/NOPB FAQ
1.How can I place an order for LM393TLX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393TLX/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 LM393TLX/NOPB reliable?
The price and inventory of LM393TLX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393TLX/NOPB is usually 5 days.
3.What payment methods are accepted for LM393TLX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393TLX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393TLX/NOPB?
LM393TLX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393TLX/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 LM393TLX/NOPB?
For technical support, including LM393TLX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393TLX/NOPB requirements.
6.How does Aetrix verify that LM393TLX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM393TLX/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 LM393TLX/NOPB meets industry standards.
7.What is the process for return or replacement of LM393TLX/NOPB?
All LM393TLX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM393TLX/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 LM393TLX/NOPB part is unused and in its original packaging.
Return procedure for LM393TLX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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