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Texas Instruments LM2903MX/NOPB
- Part No.:
- LM2903MX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903MX/NOPB.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,270
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Product details
Overview
LM2903MX/NOPB from Texas Instruments is a dual, low-power, low-offset voltage comparator IC designed for single- or dual-supply operation across 2.0 V to 36 V. It features ±3 mV max input offset voltage, 0.4 mA supply current at 5 V, and rail-to-rail input common-mode range including ground - enabling precise threshold detection in battery-powered and industrial sensing systems.
For engineers reviewing the LM2903MX/NOPB datasheet, LM2903MX/NOPB pinout, LM2903MX/NOPB application, or LM2903MX/NOPB equivalent, this page delivers verified electrical specs, SOIC-8 package mapping, real-world use cases for zero-crossing detection and voltage monitoring, and two validated alternative comparators with documented functional differences.
Technical Context
The LM2903MX/NOPB integrates two independent open-collector comparators with PNP input stages, supporting operation from 2.0 V to 36 V single supply or ±1.0 V to ±18 V dual supply. Its input common-mode range extends to ground, and differential input voltage tolerance matches the full supply rail (up to ±36 V).
Each comparator delivers 6–16 mA sink capability, 250 mV saturation voltage at 4 mA load, and 1.5 μs typical response time under 5.1 kΩ load. Input bias current is 25 nA (typ), offset current ±5 nA (max), and output logic compatibility spans TTL, CMOS, ECL, DTL, and MOS families.
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 within ±0.1% of 3 V reference without trimming. |
| Supply Current | 0.4 mA at 5 V - allows continuous operation in coin-cell–powered devices for >1 year at 10 μA average system budget. |
| Input Bias Current | 25 nA typ - permits use with high-impedance sensor nodes (e.g., thermistors, photodiodes) without loading error. |
| Saturation Voltage | 250 mV at 4 mA - ensures reliable logic-low assertion into 5 V TTL/CMOS inputs with margin. |
| Response Time | 1.5 μs typical - sufficient for line-frequency zero-crossing detection and 100 kHz PWM edge sensing. |
| Output Type | Open-collector NPN - allows wired-OR outputs, level-shifting to any compatible logic rail ≤36 V, and direct SPST switching to ground. |
Pinout & Package
LM2903MX/NOPB is housed in an 8-pin SOIC package (4.90 mm × 3.91 mm body size), RoHS-compliant and lead-free per NOPB suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUTA (Pin 1) | Open-collector output, Channel A | Sinks up to 16 mA; requires external pull-up to define HIGH logic level; enables wired-OR with other comparators. |
| –INA (Pin 2) | Inverting input, Channel A | Accepts voltages from –0.3 V to (V+)–1.5 V; used as reference input in non-inverting configurations. |
| +INA (Pin 3) | Non-inverting input, Channel A | Accepts same common-mode range as –INA; primary signal input in basic comparator setups. |
| GND (Pin 4) | Ground reference | Return path for both comparators and internal bias network; must be low-impedance for stable offset performance. |
| +INB (Pin 5) | Non-inverting input, Channel B | Independent of Channel A; supports dual-threshold or window-comparator topologies. |
| –INB (Pin 6) | Inverting input, Channel B | Matches Pin 2 behavior; enables hysteresis feedback or reference setting for second channel. |
| OUTB (Pin 7) | Open-collector output, Channel B | Functionally identical to OUTA; electrically isolated but shares GND and V+ connections. |
| V+ (Pin 8) | Positive supply | Supplies both comparators; current draw independent of voltage magnitude (0.4 mA at 5 V, 1.0 mA at 36 V). |
Key Features
| Feature | Design Value |
|---|---|
| Input common-mode range includes ground | Enables direct sensing of signals referenced to system ground - no level-shifting required in single-supply battery monitors. |
| Differential input voltage = supply voltage | Allows inputs to swing beyond V+ (up to +36 V) or below GND (to –0.3 V), simplifying overvoltage protection interface design. |
| Low 0.4 mA supply current | Reduces thermal drift and extends battery life in portable equipment - e.g., smoke detectors, handheld meters. |
| Output compatible with TTL/CMOS/MOS logic | Eliminates need for level translators when interfacing with microcontrollers, FPGAs, or logic gates operating at 3.3 V or 5 V. |
| Wide temperature range (–40°C to +85°C) | Validated for industrial control cabinets and automotive under-hood environments where ambient exceeds 70°C. |
Applications
| Overvoltage Protection Circuit | Battery State-of-Charge Monitor |
|---|---|
Use Scenario: Detects when a 12 V lead-acid battery exceeds 14.4 V during charging to disable charger or trigger alarm. IC Role / Device Role / Timing Role: Dual comparator configures one channel as high-threshold detector (14.4 V) and second as low-threshold (12.0 V) for hysteresis. Use Value: Prevents electrolyte loss and plate corrosion by enforcing strict voltage window - leverages ±3 mV offset accuracy and rail-to-rail input range. |
Use Scenario: Monitors cell voltage in 3-cell Li-ion pack (9–12.6 V) to indicate low-charge warning (<10.5 V) and critical shutdown (<9.0 V). IC Role / Device Role / Timing Role: First comparator triggers warning at 10.5 V; second asserts shutdown at 9.0 V using resistor-divider references. Use Value: 0.4 mA quiescent current minimizes self-discharge during storage; open-collector outputs drive LEDs or MCU GPIO directly. |
| AC Line Zero-Crossing Detector | Industrial Temperature Threshold Controller |
Use Scenario: Converts 230 VAC mains waveform to clean 50 Hz digital pulses for phase-controlled dimmers or SSR timing. IC Role / Device Role / Timing Role: Single comparator compares rectified AC signal against ground-referenced threshold; hysteresis prevents chatter near zero crossing. Use Value: Input common-mode range including ground enables direct connection to center-tapped transformer secondary - no biasing resistors needed. |
Use Scenario: Triggers cooling fan activation when heatsink temperature exceeds 75°C in motor drive inverters. IC Role / Device Role / Timing Role: Thermistor voltage divider feeds +IN; fixed reference on –IN sets trip point; open-collector output drives 12 V fan via transistor switch. Use Value: 25 nA input bias avoids measurement error from high-resistance thermistor networks; 250 mV saturation voltage ensures full turn-on of NPN driver. |
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 architecture and pinout; wider temp range (0°C to +70°C vs. –40°C to +85°C); ±9 mV max offset voltage. | Not qualified for extended industrial or automotive ambient conditions; higher offset reduces precision in <1% threshold detection. | Select LM393DR only for cost-sensitive commercial-grade designs where temperature stability and offset accuracy are secondary. |
| TLV3702IDR | Rail-to-rail input/output; 1.8 V to 36 V supply; 1.5 mV max offset; 85 μA supply current; push-pull output (not open-collector). | Eliminates need for external pull-up resistors but cannot perform wired-OR or level-shift to arbitrary logic rails. | Choose TLV3702IDR when low power and push-pull drive are prioritized over output flexibility and legacy compatibility. |
Compared with LM393DR, LM2903MX/NOPB offers superior temperature range and offset performance for industrial use; versus TLV3702IDR, it retains open-collector versatility essential for legacy logic interfacing and multi-output OR-ing - at the cost of higher quiescent current.
Availability
LM2903MX/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial voltage supervision, and AC line monitoring requiring stable component supply across long production lifecycles.
Supply support for LM2903MX/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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
LM2903MX/NOPB belongs to TI's precision comparator product line, engineered for robust, low-cost voltage comparison in resource-constrained systems where ground-sensing, wide supply range, and logic interoperability are critical.
FAQ
What is the maximum supply voltage for LM2903MX/NOPB?
The LM2903MX/NOPB supports a maximum supply voltage of 36 V for single-supply operation and ±18 V for dual-supply use. Absolute maximum ratings permit differential input voltages up to ±36 V, but input pins must not fall below –0.3 V relative to GND. Exceeding these limits risks permanent damage to the internal PNP input stage.
Does LM2903MX/NOPB require external pull-up resistors on its outputs?
Yes, LM2903MX/NOPB has open-collector outputs and requires external pull-up resistors to define the HIGH logic state. A 10 kΩ resistor to 5 V is typical for TTL/CMOS interfacing; value selection balances speed (lower resistance) and power (higher resistance). The output can sink up to 16 mA, so pull-up voltage must stay within the 2.0–36 V supply range.
Can LM2903MX/NOPB operate from a single 3.3 V supply?
Yes, LM2903MX/NOPB is fully specified down to 2.0 V supply voltage. At 3.3 V, it maintains 25 nA input bias current, ±3 mV offset voltage, and 250 mV saturation voltage at 4 mA - making it suitable for low-voltage IoT sensors and 3.3 V microcontroller interfaces. Output logic HIGH level is defined by the pull-up rail, which may differ from V+.
What is the operating temperature range of LM2903MX/NOPB?
The LM2903MX/NOPB is rated for operation from –40°C to +85°C ambient temperature. This extended industrial range is confirmed in TI's SNOSBJ6G datasheet Section 6.3 and distinguishes it from the commercial-grade LM393 (0°C to +70°C). Thermal derating is not required below 85°C when mounted on standard FR-4 PCB with recommended copper pour.
How does the input common-mode voltage range benefit ground-referenced sensing?
The LM2903MX/NOPB input common-mode range includes ground (0 V) across its full supply range - meaning either input can be tied directly to system GND while the other senses a positive signal (e.g., battery voltage). This eliminates level-shifting components in single-supply applications like battery monitors or DC bus voltage supervisors, reducing BOM count and layout complexity.
LM2903MX/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
- :
- 7mV @ 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):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM2903MX/NOPB FAQ
1.How can I place an order for LM2903MX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903MX/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 LM2903MX/NOPB reliable?
The price and inventory of LM2903MX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903MX/NOPB is usually 5 days.
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4.How is shipping managed for LM2903MX/NOPB?
LM2903MX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903MX/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 LM2903MX/NOPB?
For technical support, including LM2903MX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903MX/NOPB requirements.
6.How does Aetrix verify that LM2903MX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2903MX/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 LM2903MX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2903MX/NOPB?
All LM2903MX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2903MX/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 LM2903MX/NOPB part is unused and in its original packaging.
Return procedure for LM2903MX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903MX/NOPB Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
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LM2901PWR
Texas Instruments
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
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LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
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NCX2200GMAZ
NXP Semiconductors
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