My Inquiry
My Account
Texas Instruments LM2903M
- Part No.:
- LM2903M
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903M.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:154
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2903M from Texas Instruments is a dual, low-power, precision voltage comparator IC designed for single- or dual-supply operation across 2.0 V to 36 V. It features ±3 mV maximum input offset voltage, 25 nA typical input bias current, and open-collector outputs compatible with TTL/CMOS logic-enabling ground-sensing applications such as battery voltage monitoring and industrial limit detection.
For engineers reviewing the LM2903M datasheet, LM2903M pinout, LM2903M application, or LM2903M equivalent, key selection considerations include its rail-to-rail input common-mode range (including ground), 0.4 mA supply current at 5 V, open-collector output drive capability up to 16 mA, and SOIC-8 packaging suitable for space-constrained industrial and automotive control designs.
Technical Context
The LM2903M integrates two independent comparators with PNP input stages enabling input common-mode voltage down to ground-even under single-supply operation. Its open-collector NPN output stage allows flexible pull-up to any logic rail within the 2.0–36 V supply range and supports wired-OR configurations.
It operates over −40°C to +85°C, draws supply current independent of V+, and maintains stable performance across wide supply voltages due to internally regulated biasing. Input differential voltage tolerance extends to ±36 V, exceeding the supply rails without damage.
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 - supports wide-input industrial sensors and battery-powered systems. |
| Input Offset Voltage | ±3 mV max at 25°C - enables accurate threshold detection in precision level-shifting and zero-crossing circuits. |
| Input Bias Current | 25 nA typical - permits use with high-impedance sources like thermistors or photodiodes without signal loading. |
| Supply Current | 0.4 mA at 5 V - ensures ultra-low power consumption ideal for always-on monitoring in portable equipment. |
| Output Sink Current | 6.0 mA min, 16 mA typ - drives standard logic inputs, LEDs, or small relays directly without external buffers. |
| Output Saturation Voltage | 250 mV max at 4 mA - delivers strong LOW-state logic compatibility with TTL, CMOS, and microcontroller GPIOs. |
| Input Common-Mode Range | Includes ground (0 V) to V+−1.5 V - allows direct sensing of signals referenced to system ground in single-supply systems. |
Pinout & Package
LM2903M is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with 4.90 mm × 3.91 mm body size and standard 1.27 mm pitch. This surface-mount package supports automated assembly and offers thermal resistance of 150°C/W (θJA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Output A | Open-collector NPN output - requires external pull-up; sinks current when active LOW. |
| 2 (−INA) | Inverting Input A | Comparator A reference input - accepts analog signals up to V+−1.5 V or down to −0.3 V. |
| 3 (+INA) | Noninverting Input A | Comparator A signal input - same voltage range as −INA; determines output polarity. |
| 4 (GND) | Ground | Power and signal reference node - must be connected to system ground for single-supply operation. |
| 5 (+INB) | Noninverting Input B | Comparator B signal input - electrically identical to +INA; supports dual-threshold or window detection. |
| 6 (−INB) | Inverting Input B | Comparator B reference input - used independently or paired with +INB for hysteresis or differential sensing. |
| 7 (OUTB) | Output B | Open-collector NPN output - functionally identical to OUTA; supports independent or OR'd logic outputs. |
| 8 (V+) | Positive Supply | Single or positive rail supply input - powers both comparators; tolerant of 36 V transients. |
Key Features
| Feature | Design Value |
|---|---|
| Input common-mode range includes ground | Enables direct sensing of 0 V–referenced signals (e.g., battery terminals, sensor GND) without level-shifting circuitry. |
| Open-collector outputs | Allows flexible logic interfacing: pull-up to 3.3 V, 5 V, or 12 V rails; supports wired-OR for multi-comparator decision logic. |
| Low supply current (0.4 mA) | Reduces standby power in battery-operated devices - extends runtime in smoke detectors, portable meters, and IoT edge nodes. |
| Differential input voltage = supply voltage | Permits input signals exceeding V+ (up to 36 V) without damage - simplifies interface with high-voltage sensors or industrial buses. |
| −40°C to +85°C operating range | Validates reliability in automotive under-hood, industrial PLC, and outdoor equipment environments without derating. |
Applications
| Battery Voltage Monitor | Industrial Limit Switch |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during charging/discharging to trigger overvoltage or undervoltage shutdown. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel compares against upper threshold (4.25 V), the other against lower threshold (2.8 V). Use Value: Uses single LM2903M to replace discrete transistor-based comparators, reducing BOM count and PCB area while maintaining ±3 mV accuracy. |
Use Scenario: Detecting mechanical actuation of a cam or proximity switch in factory automation machinery. IC Role / Device Role / Timing Role: Comparator converts analog sensor output (e.g., 0–10 V position signal) into clean digital enable/disable signal for PLC input. Use Value: Ground-referenced input range eliminates need for op-amp level-shifting; open-collector output interfaces directly with 24 V PLC inputs via pull-up. |
| Zero-Crossing Detector | Power Supply Sequencing |
|
Use Scenario: Synchronizing TRIAC firing in AC dimmer circuits or detecting AC line phase transitions. IC Role / Device Role / Timing Role: Single comparator channel biased at 0 V reference (via GND-connected −IN) detects polarity reversal of AC waveform. Use Value: Input common-mode range including ground allows direct connection to transformer-coupled AC signal without DC biasing network. |
Use Scenario: Ensuring correct power-up order of multiple rails (e.g., 12 V before 3.3 V) in FPGA or DSP systems. IC Role / Device Role / Timing Role: Two comparators monitor each rail's voltage against precision references; outputs control enable pins of downstream regulators. Use Value: Low 0.4 mA quiescent current minimizes impact on early-stage power sequencing; SOIC-8 footprint fits tight layout constraints near PMICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Same core architecture and specs, but rated for 0°C to +70°C ambient - lacks extended industrial temperature range. | Suitable for commercial-grade consumer electronics; not qualified for automotive or industrial control cabinets. | Select LM393DR only if ambient operating temperature remains ≤70°C and cost sensitivity outweighs long-term reliability requirements. |
| TLV3702IDR | Rail-to-rail input/output, 1 µA supply current, but ±15 mV offset voltage - higher precision not required for basic threshold detection. | Better for ultra-low-power battery applications where microamp-level current matters more than sub-mV accuracy. | Choose TLV3702IDR when system sleep current budget is <10 µA and comparator speed >1 µs is acceptable; LM2903M remains optimal for robustness and cost. |
Compared with LM393DR and TLV3702IDR, the LM2903M delivers superior temperature stability (−40°C to +85°C), tighter offset voltage (±3 mV vs. ±9 mV), and proven ruggedness in noisy industrial environments - making it the preferred choice for safety-critical monitoring and control functions.
Availability
LM2903M is available at Aetrix Electronics and suitable for battery-powered applications, industrial limit detection, and automotive power sequencing requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM2903M 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 90 years of innovation in precision analog ICs and broad industrial portfolio coverage.
The LM2903M belongs to TI's legacy precision comparator family, engineered for reliability in harsh environments - targeting industrial automation, automotive subsystems, and energy infrastructure where consistent threshold detection is mission-critical.
FAQ
What is the operating temperature range for the LM2903M?
The LM2903M is specified for operation from −40°C to +85°C ambient temperature. This extended industrial range ensures reliable performance in automotive engine compartments, factory floor controllers, and outdoor power equipment - unlike the LM393 (0°C to +70°C) or LM193 (−55°C to +125°C), which target different application segments.
Does the LM2903M require dual supplies to operate?
No, the LM2903M operates from a single supply ranging from 2.0 V to 36 V. Its input common-mode voltage range includes ground, allowing direct sensing of 0 V–referenced signals without negative rails. Dual-supply operation (±1.0 V to ±18 V) is supported but not required - simplifying design in battery-powered and isolated systems.
Can the LM2903M outputs drive TTL or CMOS logic directly?
Yes, the LM2903M's open-collector outputs are explicitly designed for TTL, DTL, ECL, MOS, and CMOS compatibility. With an appropriate pull-up resistor (e.g., 10 kΩ to 5 V), the output saturation voltage stays ≤250 mV at 4 mA - meeting TTL LOW-level input requirements and ensuring noise-immune digital interfacing.
What is the maximum input voltage the LM2903M can tolerate on its pins?
The LM2903M tolerates differential input voltages up to ±36 V and absolute input voltages from −0.3 V to +36 V - exceeding its supply rails. This allows direct connection to high-voltage sensors or industrial fieldbus signals without external clamping, provided the −0.3 V lower limit is respected to avoid forward-biasing internal PNP input junctions.
Is the LM2903M pin-compatible with other dual comparators in the LMx93 family?
Yes, the LM2903M shares identical SOIC-8 pinout and electrical behavior with LM393, LM293, and LM193 variants - including OUTA/OUTB, ±INA/±INB, GND, and V+ assignments. However, temperature ratings and offset voltage distributions differ: LM2903M is optimized for −40°C to +85°C with ±3 mV max offset, while LM393 is commercial-grade (0°C to +70°C) and LM193 is military-qualified.
LM2903M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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
LM2903M FAQ
1.How can I place an order for LM2903M through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903M 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 LM2903M reliable?
The price and inventory of LM2903M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903M is usually 5 days.
3.What payment methods are accepted for LM2903M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903M?
LM2903M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903M 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 LM2903M?
For technical support, including LM2903M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903M requirements.
6.How does Aetrix verify that LM2903M is sourced from the original manufacturer or authorized distributors?
All LM2903M 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 LM2903M meets industry standards.
7.What is the process for return or replacement of LM2903M?
All LM2903M units undergo pre-shipment inspection (PSI). If there is an issue with LM2903M, 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 LM2903M part is unused and in its original packaging.
Return procedure for LM2903M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903M 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 Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
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…
