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STMicroelectronics LM2901YDT
- Part No.:
- LM2901YDT
- Manufacturer:
- STMicroelectronics
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2901YDT.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:8,285
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Product details
Overview
LM2901YDT from STMicroelectronics is an automotive-grade quad voltage comparator in SO-14 package, designed for single-supply operation from +2 V to +36 V (or ±1 V to ±18 V), with 1.1 mA total supply current, 25 nA typical input bias current, and rail-to-rail input common-mode range including the negative rail. It drives TTL/CMOS loads and is used in battery monitoring, overvoltage protection, and window comparators in automotive control units.
For engineers reviewing the LM2901YDT datasheet, LM2901YDT pinout, LM2901YDT application, or LM2901YDT equivalent, this page delivers verified electrical parameters, validated SO-14 pin mapping, automotive-qualified operating conditions (−40 °C to +125 °C), and direct alternatives with documented functional trade-offs.
Technical Context
The LM2901YDT integrates four independent open-collector comparators with PNP input stages enabling input voltages down to the negative rail (0 V in single-supply mode) and differential input ranges up to ±36 V. Its output stage sinks up to 16 mA while maintaining 250 mV typical saturation voltage at 4 mA load.
It operates across industrial and automotive temperature ranges without performance derating, supports fast response (1.3 µs small-signal, 500 ns large-signal rise time), and features ESD robustness (500 V HBM, 1500 V CDM) required for under-hood electronics.
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 with 12 V/24 V automotive batteries and legacy 5 V logic rails. |
| Supply Current (all 4) | 1.1 mA typ. at +5 V - reduces system power budget by >70% vs. legacy quad comparators like LM339. |
| Input Bias Current | 25 nA typ. - minimizes loading on high-impedance sensor references (e.g., thermistor dividers, magnetic pickup circuits). |
| Input Offset Voltage | 1 mV min., 7 mV typ. - supports accurate threshold detection in precision battery cell balancing and low-voltage fault sensing. |
| Output Sink Current | 6 mA min., 16 mA max. - directly drives LEDs, relays, or logic inputs without external buffer transistors. |
| Response Time | 1.3 µs (small-signal), 500 ns (large-signal) - suitable for PWM edge detection and fast overcurrent trip in motor drivers. |
| Common-Mode Input Range | Includes negative rail (0 V) - allows ground-referenced input sensing without level-shifting circuitry. |
Pinout & Package
LM2901YDT uses the SO-14 (Small Outline) package: 14-pin, 3.9 mm width, 1.27 mm pitch, gull-wing leads, RoHS-compliant, automotive-qualified (AEC-Q100 Grade 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input of comparator 1 | Accepts reference or feedback signal; compatible with 0 V to VCC–1.5 V common-mode range. |
| 2 | Non-inverting input of comparator 1 | Accepts sensed signal (e.g., battery voltage); supports rail-to-rail input swing. |
| 3 | Output of comparator 1 | Open-collector NPN output; requires external pull-up to VCC or logic rail for active-high interface. |
| 4 | GND / VCC− | Negative supply terminal; serves as reference for single-supply operation and return path for all comparators. |
| 5 | Non-inverting input of comparator 2 | Independent input for second threshold comparison (e.g., low-voltage warning). |
| 6 | Inverting input of comparator 2 | Reference input for comparator 2; electrically isolated from other channels. |
| 7 | Output of comparator 2 | Open-collector output; shares no internal connection with other outputs - supports wired-OR logic. |
| 8 | VCC+ | Positive supply input; accepts 2–36 V DC; powers all four comparators and output stages. |
| 9 | Inverting input of comparator 3 | Third independent input channel; usable for hysteresis feedback or dual-threshold latching. |
| 10 | Non-inverting input of comparator 3 | Signal input for third comparator; identical electrical specs to pins 1 and 2. |
| 11 | Output of comparator 3 | Third open-collector output; enables three-level status indication (e.g., OK/WARN/FAULT). |
| 12 | Non-inverting input of comparator 4 | Fourth input channel; supports full quad functionality without shared resources. |
| 13 | Inverting input of comparator 4 | Reference input for fourth comparator; fully decoupled from other inputs. |
| 14 | Output of comparator 4 | Final open-collector output; allows independent control of four discrete functions (e.g., fan speed, heater enable, alarm, reset). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range including negative rail | Enables direct ground-referenced sensing without level shifters or bias networks - reduces BOM count and layout area. |
| Low 1.1 mA total supply current | Supports always-on automotive modules (e.g., body control units) with <5.5 mW total dissipation at 5 V - extends battery life in sleep modes. |
| 25 nA typical input bias current | Preserves accuracy in high-Z sensor interfaces (e.g., 10 MΩ thermistor networks) without requiring guard traces or active compensation. |
| 250 mV typical output saturation voltage at 4 mA | Ensures reliable logic-low recognition by 3.3 V or 5 V CMOS/TTL receivers even under worst-case load and temperature. |
| AEC-Q100 Grade 1 qualification (−40 °C to +125 °C) | Validated for under-hood deployment in engine control, transmission, and ADAS subsystems without derating. |
Applications
| Battery Voltage Monitoring | Overvoltage Protection Circuit |
|---|---|
|
Use Scenario: Real-time monitoring of 12 V lead-acid or 48 V mild-hybrid battery packs in automotive ECUs. IC Role / Device Role / Timing Role: Quad comparator compares battery voltage against four thresholds (e.g., 10.5 V, 12.0 V, 13.8 V, 15.5 V) to trigger charge control, warning, and shutdown states. Use Value: Eliminates need for external ADC and microcontroller polling - provides deterministic, zero-latency fault response with hardware latching capability. |
Use Scenario: Preventing damage to downstream 5 V or 3.3 V logic from alternator surge or load dump events. IC Role / Device Role / Timing Role: One comparator channel monitors input rail; output disables PMIC enable line within 500 ns when voltage exceeds 16 V threshold. Use Value: Achieves faster trip than microcontroller-based solutions - avoids latch-up or permanent damage during transient overvoltage events. |
| Window Comparator for Sensor Diagnostics | Zero-Crossing Detector (Single Supply) |
|
Use Scenario: Validating operational range of analog sensors (e.g., oxygen, pressure, crankshaft position) in engine management systems. IC Role / Device Role / Timing Role: Two comparators form high/low bounds; third detects out-of-range condition; fourth enables hysteresis for noise immunity. Use Value: Provides fail-safe sensor health reporting without software intervention - meets ASIL-B diagnostic coverage requirements. |
Use Scenario: Converting AC signals (e.g., camshaft/crankshaft sine wave) into clean digital edges for timing control in ignition systems. IC Role / Device Role / Timing Role: Single comparator with resistive divider sets 0 V reference; rail-to-rail input captures zero crossings across full AC amplitude. Use Value: Delivers sub-microsecond jitter-free edge detection - critical for precise spark timing and fuel injection synchronization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DT | Higher supply current (2.0 mA), wider offset voltage (2–30 mV), non-automotive grade (−40 °C to +85 °C only) | Limited to cabin or non-critical modules; not qualified for under-hood deployment. | Select when cost sensitivity outweighs AEC-Q100 compliance and power efficiency. |
| TLV3704IPW | Rail-to-rail output, lower supply current (80 µA), but narrower supply range (2.7–16 V) and no negative-rail input capability | Suitable for low-voltage battery-powered modules only; cannot replace LM2901YDT in 24 V systems or ground-referenced sensing. | Choose for ultra-low-power portable diagnostics tools where 12 V/24 V compatibility is unnecessary. |
Compared with LM339DT and TLV3704IPW, LM2901YDT uniquely combines automotive qualification, negative-rail input support, and wide 2–36 V operation - making it the only drop-in solution for robust, single-supply 12 V/24 V vehicle subsystems requiring deterministic analog thresholding.
Availability
LM2901YDT is available at Aetrix Electronics and suitable for automotive battery management, engine control unit (ECU) diagnostics, body electronics, and ADAS sensor interface designs requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LM2901YDT 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.
LM2901YDT belongs to ST's precision analog comparator family, engineered specifically for automotive reliability, low-power operation, and seamless integration into single-supply embedded control systems.
FAQ
Can LM2901YDT operate from a single 3.3 V supply?
Yes - LM2901YDT supports single-supply operation from +2 V to +36 V. At 3.3 V, its input common-mode range extends from 0 V to 1.8 V (VCC–1.5 V), and output sink current remains functional (≥6 mA). However, output high-level voltage is undefined (open-collector), requiring an external pull-up to 3.3 V.
Does LM2901YDT require external hysteresis resistors?
No - hysteresis is optional and externally configurable. The device has no internal hysteresis; users add positive feedback via resistors between output and non-inverting input to suppress noise-induced oscillation in slow-moving or noisy input signals (e.g., thermistor readings).
What is the maximum capacitive load LM2901YDT can drive directly?
LM2901YDT's open-collector output is rated for 16 mA sink current but has no specified capacitive drive limit. For loads exceeding 50 pF, response time degrades due to RC delay; above 100 pF, slew rate limiting occurs. Use a series resistor (e.g., 100 Ω) between output and capacitive node to maintain timing integrity.
Is LM2901YDT pin-compatible with standard LM2901 variants like LM2901DT?
Yes - LM2901YDT shares identical SO-14 pinout, electrical characteristics, and footprint with LM2901DT. The "Y" suffix denotes AEC-Q100 Grade 1 qualification and enhanced process screening; all functional and mechanical interfaces remain fully interchangeable.
LM2901YDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- CMOS, DTL, ECL, MOS, Open-Collector, TTL
- Voltage - Supply, Single/Dual (±):
- 2V ~ 32V, ±1V ~ 16V
- :
- 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:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- 14-SO
LM2901YDT FAQ
1.How can I place an order for LM2901YDT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2901YDT 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 LM2901YDT reliable?
The price and inventory of LM2901YDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2901YDT is usually 5 days.
3.What payment methods are accepted for LM2901YDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2901YDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2901YDT?
LM2901YDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2901YDT 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 LM2901YDT?
For technical support, including LM2901YDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2901YDT requirements.
6.How does Aetrix verify that LM2901YDT is sourced from the original manufacturer or authorized distributors?
All LM2901YDT 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 LM2901YDT meets industry standards.
7.What is the process for return or replacement of LM2901YDT?
All LM2901YDT units undergo pre-shipment inspection (PSI). If there is an issue with LM2901YDT, 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 LM2901YDT part is unused and in its original packaging.
Return procedure for LM2901YDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2901YDT Tags
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