My Inquiry
My Account
STMicroelectronics LM2903HYDT
- Part No.:
- LM2903HYDT
- Manufacturer:
- STMicroelectronics
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903HYDT.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,691
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2903HYDT from STMicroelectronics is a low-power dual voltage comparator in SO8 package, operating from 2 V to 36 V single supply (or ±1 V to ±18 V dual supply), with 0.4 mA typical supply current, 25 nA input bias current, and input common-mode range extending to ground - enabling direct sensing of ground-referenced signals in automotive body control modules.
For engineers reviewing the LM2903HYDT datasheet, LM2903HYDT pinout, LM2903HYDT application, or LM2903HYDT equivalent, key selection considerations include its AEC-Q100 qualified automotive grade, rail-to-rail input capability down to ground, TTL/CMOS-compatible open-collector outputs, and guaranteed operation from −40 °C to +150 °C.
Technical Context
The LM2903HYDT integrates two independent comparators with PNP input stages, delivering stable performance across wide supply ranges without requiring dual-rail support. Its input stage allows common-mode voltages down to −0.3 V relative to VCC−, while differential input voltage tolerance matches full supply rails (±36 V).
Output stage uses open-collector NPN transistors capable of sinking up to 16 mA at 25 °C, with 250 mV typical saturation voltage at 4 mA load. Response time is 500 ns for TTL-level transitions under 5.1 kΩ pull-up load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V single supply; enables direct integration into 12 V/24 V automotive systems without level-shifting |
| Input Bias Current | 25 nA typ.; minimizes loading on high-impedance sensor bridges or reference dividers |
| Input Offset Voltage | 1 mV min / 7 mV typ.; supports accurate threshold detection in precision window comparators |
| Output Sink Current | 6 mA min / 16 mA max; drives standard LED indicators or logic-level inputs directly |
| Operating Temperature | −40 °C to +150 °C; qualified per AEC-Q100 Grade 0 for under-hood automotive use |
| Response Time | 500 ns typ. (TTL transition); suitable for fast edge detection in motor phase monitoring |
Pinout & Package
LM2903HYDT is housed in an automotive-grade SO8 (Small Outline 8-pin) package with gull-wing leads, ECOPACK® compliant, 1.27 mm pitch, and thermal resistance RthJA = 125 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output 1 | Open-collector output; requires external pull-up to define high state and logic family compatibility |
| 2 | Inverting Input 1 | Differential input node for first comparator; accepts signals down to −0.3 V below VCC− |
| 3 | Non-inverting Input 1 | Differential input node for first comparator; common-mode range includes ground |
| 4 | VCC− | Negative supply or ground reference terminal; supports single-supply operation with grounded VCC− |
| 5 | Non-inverting Input 2 | Differential input node for second comparator; electrically isolated from Input 1 |
| 6 | Inverting Input 2 | Differential input node for second comparator; shares same input stage architecture as Input 1 |
| 7 | Output 2 | Open-collector output; independently configurable with separate pull-up resistor |
| 8 | VCC+ | Positive supply terminal; supports up to 36 V, defining upper rail for both comparators |
Key Features
| Feature | Design Value |
|---|---|
| Ground-sensing input stage | Input common-mode range includes 0 V even on single supply - eliminates need for negative rail in battery-monitoring circuits |
| Low quiescent current | 0.4 mA typ. at 5 V - reduces standby power in always-on vehicle subsystems like door module wake-up detection |
| AEC-Q100 qualification | Grade 0 (−40 °C to +150 °C) - certified for engine compartment and transmission control applications |
| Robust ESD protection | 800 V HBM - enhances reliability during automated PCB assembly and field service handling |
| Wide differential input range | ±36 V - tolerates transient overvoltage events on sensor lines without latch-up or damage |
Applications
| Body Control Module (BCM) | Engine Coolant Level Detection |
|---|---|
Use Scenario: Monitoring door lock actuator feedback voltage against threshold to confirm mechanical engagement. IC Role / Device Role / Timing Role: Dual comparator performs simultaneous high/low threshold validation on analog position signal. Use Value: Enables fail-safe detection using single device - reduces BOM count versus discrete transistor-based solutions. | Use Scenario: Interfacing float switch or capacitive coolant sensor to microcontroller GPIO with hysteresis. IC Role / Device Role / Timing Role: Comparator converts analog level into clean digital flag; internal hysteresis prevents chatter near threshold. Use Value: Eliminates need for external Schmitt trigger or RC network - saves board space and calibration effort. |
| Transmission Fluid Temperature Monitor | 12 V Battery State-of-Charge Alert |
Use Scenario: Comparing thermistor voltage divider output to fixed reference to trigger overtemperature warning. IC Role / Device Role / Timing Role: First comparator detects upper limit; second provides hysteresis via feedback for stable switching. Use Value: Achieves <10 mV effective hysteresis with no external components - improves thermal response accuracy. | Use Scenario: Detecting battery voltage drop below 11.8 V to initiate low-power mode before cranking. IC Role / Device Role / Timing Role: Comparator compares scaled battery voltage to precision bandgap reference. Use Value: Operates reliably at cold-crank voltages down to 6 V - ensures alert functionality during engine start. |
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 |
|---|---|---|---|
| LM2903QDR | SO8 package, AEC-Q100 Grade 1 (−40 °C to +125 °C), identical electrical specs | Limited to under-dash applications; not rated for under-hood ambient extremes | Select when cost sensitivity outweighs extended temperature requirement |
| TLV3702IDR | Rail-to-rail input/output, 1 µA supply current, but max 16 V supply and −40 °C to +125 °C only | Not suitable for 24 V commercial vehicle systems or high-temp transmission control | Prefer for ultra-low-power portable or infotainment subsystems with lower voltage rails |
Compared with LM2903QDR and TLV3702IDR, LM2903HYDT uniquely supports 36 V operation and +150 °C junction temperature - making it the only choice for direct integration into high-voltage, high-ambient automotive powertrain and chassis modules.
Availability
LM2903HYDT is available at Aetrix Electronics and suitable for automotive body control modules, engine management subsystems, and industrial power supply supervision requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM2903HYDT 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 microcontrollers, power ICs, sensors, and analog components for automotive, industrial, and consumer markets.
The LM2903H series targets automotive-grade signal conditioning, providing robust, low-power comparators optimized for harsh-environment sensing and interface applications where reliability and extended temperature operation are critical.
FAQ
Can LM2903HYDT operate with VCC− left unconnected in single-supply mode?
Yes - VCC− serves as the ground reference in single-supply configurations and must be connected to system ground. Leaving it floating will cause undefined behavior and potential damage. The device is designed for VCC− = GND, with inputs referenced to that node.
Does LM2903HYDT require external hysteresis for stable switching?
No - hysteresis can be added externally via positive feedback, but the device itself has no built-in hysteresis. Stable switching depends on circuit design; many automotive applications implement 10–50 mV hysteresis using resistor networks between output and non-inverting input.
What is the maximum sink current per output at +150 °C?
At +150 °C, the output sink current drops to 2 mA minimum (per Table 3, "Output sink current, Tmin ≤ Tamb ≤ Tmax"). This derating must be accounted for in high-temperature designs driving LEDs or logic inputs with heavy loads.
Is LM2903HYDT pin-compatible with legacy LM2903 variants?
Yes - LM2903HYDT uses standard SO8 pinout matching LM2903D, LM2903DT, and LM2903PT. However, only HYDT is AEC-Q100 Grade 0 qualified; other variants lack the extended temperature screening and automotive-specific reliability testing.
LM2903HYDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- 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 ~ 150°C
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM2903HYDT FAQ
1.How can I place an order for LM2903HYDT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903HYDT 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 LM2903HYDT reliable?
The price and inventory of LM2903HYDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903HYDT is usually 5 days.
3.What payment methods are accepted for LM2903HYDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903HYDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903HYDT?
LM2903HYDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903HYDT 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 LM2903HYDT?
For technical support, including LM2903HYDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903HYDT requirements.
6.How does Aetrix verify that LM2903HYDT is sourced from the original manufacturer or authorized distributors?
All LM2903HYDT 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 LM2903HYDT meets industry standards.
7.What is the process for return or replacement of LM2903HYDT?
All LM2903HYDT units undergo pre-shipment inspection (PSI). If there is an issue with LM2903HYDT, 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 LM2903HYDT part is unused and in its original packaging.
Return procedure for LM2903HYDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903HYDT 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…
