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STMicroelectronics LM2903PT
- Part No.:
- LM2903PT
- Manufacturer:
- STMicroelectronics
- Category:
- Comparators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2903PT.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,914
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Product details
Overview
LM2903PT from STMicroelectronics is a low-power dual voltage comparator in TSSOP8 package, operating from single supply (2–36 V) or dual supplies (±1 V to ±18 V), with 0.4 mA supply current per comparator, 25 nA typical input bias current, and rail-to-rail input common-mode range including the negative rail - used in automotive window lift control, battery voltage monitoring, and industrial overvoltage detection circuits.
For engineers reviewing the LM2903PT datasheet, LM2903PT pinout, LM2903PT application, or LM2903PT equivalent, key selection criteria include input offset voltage (1–15 mV), output sink current (6–16 mA), response time (500 ns large-signal), TTL/CMOS compatibility, and AEC-Q100 qualification for automotive-grade variants.
Technical Context
The LM2903PT integrates two independent PNP-input comparators with open-collector outputs, enabling direct interface to TTL, DTL, ECL, MOS, and CMOS logic families. Its input stage allows common-mode voltage down to the negative rail - critical for single-supply zero-crossing and level-shifting applications.
It features differential input voltage tolerance up to ±36 V, low output saturation voltage (250 mV typ. at 4 mA), and stable operation across -40 °C to +125 °C. The device avoids internal phase inversion and supports rail-to-rail input without external clamping diodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2 V to +36 V (single) or ±1 V to ±18 V (dual) - enables direct use in 3.3 V, 5 V, 12 V, and 24 V systems without level shifters |
| Supply Current | 0.4 mA per comparator at 5 V - delivers 1 mW/comparator power efficiency for battery-powered sensors and portable equipment |
| Input Bias Current | 25 nA typ. - minimizes loading on high-impedance reference dividers and transducer signal paths |
| Input Offset Voltage | 1–15 mV - ensures reliable threshold detection in precision voltage monitoring (e.g., 12 V battery SOC at ±50 mV resolution) |
| Output Sink Current | 6–16 mA - drives LEDs, relays, and logic inputs directly without external buffer transistors |
| Response Time | 500 ns (large-signal, 95% settling) - supports fast edge detection in motor commutation feedback and PWM fault sensing |
| Common-Mode Input Range | Includes negative rail (0 V to VCC −1.5 V) - eliminates need for negative supply in single-rail sensor interfaces like thermistor or RTD monitoring |
Pinout & Package
TSSOP8 (Thin Shrink Small Outline Package), 8-pin, 3.0 mm × 4.4 mm body, 0.65 mm pitch, exposed pad optional (can be left floating or grounded).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Open-collector output of comparator 1 - requires external pull-up to define logic HIGH level and drive load |
| 2 | IN1− | Inverting input of comparator 1 - accepts signals down to negative rail; used for threshold comparison against reference |
| 3 | IN1+ | Non-inverting input of comparator 1 - connects to sensed voltage (e.g., battery terminal or sensor output) |
| 4 | VCC− | Negative supply pin (GND in single-supply mode) - provides return path for input bias current and output sink current |
| 5 | VCC+ | Positive supply pin - powers both comparators; supports wide input voltage range up to +36 V |
| 6 | IN2− | Inverting input of comparator 2 - independently configurable for dual-threshold or window detection |
| 7 | IN2+ | Non-inverting input of comparator 2 - enables simultaneous monitoring of two distinct analog signals |
| 8 | OUT2 | Open-collector output of comparator 2 - isolated from OUT1; supports independent load switching or wired-OR logic |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends to negative rail (0 V) in single-supply operation - eliminates need for level-shifting circuitry in ground-referenced sensor interfaces |
| Low quiescent current | 0.4 mA per comparator at 5 V - enables >10-year battery life in always-on voltage supervision nodes (e.g., automotive telematics backup power) |
| High differential input voltage tolerance | ±36 V - withstands transient surges in automotive 12 V/24 V systems without clamping or damage |
| Open-collector TTL/CMOS-compatible outputs | Supports mixed-voltage logic interfacing (e.g., 3.3 V MCU reading 5 V or 12 V comparator output via pull-up) |
| AEC-Q100 qualified variant available | LM2903YPT meets Grade 1 (-40 °C to +125 °C) requirements - validated for engine bay and ADAS subsystems |
Applications
| Automotive Window Lift Control | Battery Voltage Monitoring |
|---|---|
Use Scenario: Detect motor stall or obstruction by comparing current-sense voltage against upper/lower thresholds during window actuation. IC Role / Device Role / Timing Role: Dual comparator implements hysteresis-based window position and jam detection logic with independent rising/falling edge triggers. Use Value: Eliminates need for microcontroller ADC and software polling - reduces BOM cost and improves real-time response (<500 ns reaction to overcurrent event). |
Use Scenario: Monitor 12 V lead-acid battery voltage to trigger low-battery warning or load shedding before cranking failure. IC Role / Device Role / Timing Role: Comparator 1 detects under-voltage (e.g., <11.8 V); comparator 2 detects over-voltage (e.g., >14.8 V) for alternator regulation fault detection. Use Value: Operates directly from battery rail with no LDO - maintains functionality even during cold-cranking dips to 6 V. |
| Industrial Overvoltage Protection | Zero-Crossing Detection (Single Supply) |
Use Scenario: Shut down AC-DC converter input stage when rectified bus exceeds safe limit (e.g., >400 V DC). IC Role / Device Role / Timing Role: High-voltage resistive divider scales bus voltage to within LM2903PT input range; comparator drives optocoupler to disable PWM controller. Use Value: Withstands ±36 V differential input - accommodates divider mismatch and noise spikes without false triggering. |
Use Scenario: Generate clean digital zero-crossing pulses from 50/60 Hz AC line for TRIAC dimming or synchronous sampling. IC Role / Device Role / Timing Role: One comparator compares AC waveform to 0 V reference (connected to VCC−); rail-to-rail input enables direct connection without bias network. Use Value: No external op-amp or bias resistor required - reduces component count and thermal drift in mains-connected designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-power comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DT | Higher input offset voltage (2–30 mV), wider temp range (−40 to +125 °C), same TSSOP8 footprint | Not AEC-Q100 qualified; lower ESD robustness (HBM 500 V vs. LM2903PT's 800 V) | Preferred for cost-sensitive industrial controls where automotive qualification is unnecessary |
| TLV3702IPWR | Rail-to-rail input/output, 65 µA supply current, 36 V max supply, but only 1.8–36 V operation (no ±18 V dual) | Lower power and faster response (1.3 µs), but lacks negative-rail input capability and open-collector drive strength | Best for ultra-low-power battery systems requiring full rail-to-rail I/O, not for legacy TTL interface or high-sink-current loads |
Compared with LM393DT, LM2903PT offers superior ESD immunity and automotive qualification; compared with TLV3702IPWR, it delivers higher output sink current and true negative-rail input - making it optimal for ruggedized, single-supply industrial and automotive sensing.
Availability
LM2903PT is available at Aetrix Electronics and suitable for automotive body electronics, industrial power supply monitoring, and battery management systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2903PT 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
The LM2903 product line targets cost-effective, robust analog signal conditioning in harsh environments - emphasizing wide supply range, rail-to-rail input, and automotive qualification for safety-critical voltage comparison tasks.
FAQ
Can LM2903PT operate from a single 3.3 V supply?
Yes. The LM2903PT supports single-supply operation from +2 V to +36 V, including 3.3 V. Its input common-mode range extends to the negative rail (0 V), and output saturation voltage is 250 mV typical at 4 mA sink - ensuring reliable logic-level output with a 3.3 V pull-up. Input offset voltage remains within 1–15 mV across this range.
Does LM2903PT require external pull-up resistors on its outputs?
Yes. Both outputs are open-collector and must be pulled up to a valid logic HIGH voltage (e.g., 3.3 V or 5 V) via an external resistor. Typical values range from 4.7 kΩ (for faster rise time) to 100 kΩ (for ultra-low current). The resistor value determines rise time and power consumption - no internal pull-up is provided.
What is the maximum output sink current for LM2903PT?
The LM2903PT guarantees a minimum output sink current of 6 mA and typically delivers up to 16 mA at VOL ≤ 400 mV (Tamb = 25 °C). At elevated temperatures or higher VOL, sink capability decreases - design margin should assume ≥6 mA across −40 °C to +125 °C for reliability in automotive applications.
Is LM2903PT pin-compatible with LM2903D (SO8) or LM2903ST (MiniSO8)?
No. While all share identical electrical functionality and pin function mapping (OUT1, IN1−, IN1+, VCC−, VCC+, IN2−, IN2+, OUT2), the physical packages differ: LM2903PT uses TSSOP8 (0.65 mm pitch), LM2903D uses SO8 (1.27 mm pitch), and LM2903ST uses MiniSO8 (0.65 mm pitch but different pad layout and thermal pad presence). PCB layout is not interchangeable.
LM2903PT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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 @ 5V
- 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 ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-TSSOP
LM2903PT FAQ
1.How can I place an order for LM2903PT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903PT 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 LM2903PT reliable?
The price and inventory of LM2903PT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903PT is usually 5 days.
3.What payment methods are accepted for LM2903PT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903PT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903PT?
LM2903PT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903PT 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 LM2903PT?
For technical support, including LM2903PT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903PT requirements.
6.How does Aetrix verify that LM2903PT is sourced from the original manufacturer or authorized distributors?
All LM2903PT 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 LM2903PT meets industry standards.
7.What is the process for return or replacement of LM2903PT?
All LM2903PT units undergo pre-shipment inspection (PSI). If there is an issue with LM2903PT, 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 LM2903PT part is unused and in its original packaging.
Return procedure for LM2903PT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903PT Tags
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LM2903DR
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