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Texas Instruments LM2901NG4
- Part No.:
- LM2901NG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LM2901NG4.pdf
- Description:
- IC COMPARATOR 4 DIFF 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,283
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Product details
Overview
LM2901NG4 from Texas Instruments is a quad differential comparator IC designed for single-supply operation across 2 V to 36 V, featuring ±0.37 mV typical input offset voltage, 200 µA per comparator quiescent current, 1 µs propagation delay, and rail-to-rail input common-mode range extending to ground - used in motor drive feedback, server PSU monitoring, and industrial control comparators.
For engineers reviewing the LM2901NG4 datasheet, LM2901NG4 pinout, LM2901NG4 application, or LM2901NG4 equivalent, key selection criteria include its −40°C to +125°C operating temperature range, 38 V absolute maximum supply rating, open-collector TTL/MOS/CMOS-compatible outputs, and drop-in compatibility with legacy LM2901 variants in industrial and automotive power management designs.
Technical Context
The LM2901NG4 implements four independent voltage comparators with internal ESD clamps delivering 2 kV HBM robustness. Its input stage supports common-mode voltages down to ground and up to VCC − 2 V, enabling direct sensing of low-side current shunts and high-voltage rails without level shifting.
Each comparator features an open-collector output capable of sinking 21 mA at 1.5 V saturation, compatible with external pull-up voltages up to 36 V. Propagation delay remains stable across supply voltages (2–36 V) and temperature (−40°C to +125°C), with input bias current limited to ±25 nA max over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct use in 3.3 V, 5 V, 12 V, and 24 V industrial systems without regulation |
| Input Offset Voltage (max) | ±5.5 mV over −40°C to +125°C - ensures accurate threshold detection in wide-temperature environments |
| Quiescent Current | 0.8–1.6 mA total (200 µA per comparator) - supports low-power always-on monitoring in battery-backed systems |
| Propagation Delay | 1 µs typical (TTL-level input) - suitable for fast-response overvoltage/undervoltage protection circuits |
| Input Bias Current (max) | ±50 nA over −40°C to +125°C - minimizes error in high-impedance sensor interfaces (e.g., thermistor, RTD) |
| Output Sink Current | 21 mA at VOL = 1.5 V - drives LEDs, relays, or logic inputs directly without external buffers |
| ESD Rating (HBM) | ±2000 V - meets industrial handling requirements without additional board-level protection |
Pinout & Package
LM2901NG4 is packaged in 14-pin PDIP (plastic dual in-line package), 19.30 mm × 6.40 mm body size, with through-hole mounting and industry-standard pinout compatible with legacy LM2901 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Open-collector output of comparator 1 - requires external pull-up to define logic HIGH level |
| 2 | IN1− | Inverting input of comparator 1 - accepts signals down to ground; common-mode range includes V− |
| 3 | IN1+ | Non-inverting input of comparator 1 - supports input voltages up to VCC without damage |
| 4 | VCC | Positive supply pin - rated for 38 V absolute maximum; powers all four comparators |
| 5 | OUT2 | Open-collector output of comparator 2 - electrically isolated from OUT1; shares no internal connection |
| 6 | IN2− | Inverting input of comparator 2 - identical electrical behavior to IN1− |
| 7 | IN2+ | Non-inverting input of comparator 2 - supports differential input voltage up to ±38 V |
| 8 | GND | Ground reference - serves as return path for all comparators and output sinks |
| 9 | IN3+ | Non-inverting input of comparator 3 - enables multi-threshold monitoring (e.g., under/over-temp, UV/OV) |
| 10 | IN3− | Inverting input of comparator 3 - matches IN1−/IN2− functionality and specs |
| 11 | OUT3 | Open-collector output of comparator 3 - independently configurable for dedicated fault signaling |
| 12 | IN4− | Inverting input of comparator 4 - supports same input voltage range and ruggedness as other inputs |
| 13 | OUT4 | Open-collector output of comparator 4 - provides fourth independent decision channel |
| 14 | IN4+ | Non-inverting input of comparator 4 - completes full quad configuration with no shared pins |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground and extends to VCC − 2 V - eliminates need for level-shifting in low-side current sensing |
| Drop-in replacement for LM2901/LM339 | Pin- and function-compatible with legacy A/V-grade parts - no PCB or firmware changes required |
| 2 kV HBM ESD protection | Dedicated on-chip ESD clamps - reduces risk of field failure during handling or system integration |
| Low 200 µA/comparator supply current | Enables always-on status monitoring in energy-sensitive applications like UPS and battery management |
| 1 µs propagation delay | Supports real-time response in safety-critical overcurrent or thermal shutdown circuits |
Applications
| Motor Drive Feedback | Server PSU Monitoring |
|---|---|
Use Scenario: Detecting phase current imbalance and overcurrent conditions in BLDC motor controllers using shunt resistors. IC Role / Device Role / Timing Role: Quad comparator compares amplified shunt voltage against multiple thresholds to trigger PWM disable or fault latching. Use Value: Enables precise, fast-response current limiting with <1 µs latency and rail-to-rail input support for bidirectional sensing. | Use Scenario: Monitoring output voltage rails (12 V, 5 V, 3.3 V) and fan tach signals in redundant AC/DC server power supplies. IC Role / Device Role / Timing Role: Each comparator independently validates rail presence, undervoltage, overvoltage, and fan rotation status. Use Value: Provides deterministic fault detection across four independent channels with single-supply simplicity and 36 V tolerance. |
| Industrial Temperature Control | Appliance Safety Interlock |
Use Scenario: Comparing thermistor or RTD-derived analog voltages against upper/lower trip points in HVAC and PLC temperature modules. IC Role / Device Role / Timing Role: LM2901NG4 implements hysteresis-based window comparators for stable on/off control without microcontroller intervention. Use Value: Delivers ±5.5 mV max offset and ±50 nA max input bias - minimizing drift-induced false trips over −40°C to +125°C. | Use Scenario: Verifying door latch position, water level, and heating element continuity before enabling microwave oven or washing machine cycles. IC Role / Device Role / Timing Role: Four comparators monitor discrete safety sensors simultaneously, driving separate fault indicators or MCU interrupt lines. Use Value: Open-collector outputs interface directly with 3.3 V/5 V logic or optocouplers; 38 V abs max rating accommodates diverse sensor excitation schemes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2901B | Same B-version silicon, identical electrical specs, but in SOIC-14 (8.70 mm × 3.90 mm) instead of PDIP | Surface-mount assembly; higher thermal performance (RθJA = 111.2°C/W vs. 114.9°C/W); no through-hole footprint | Select LM2901B for automated SMT production and space-constrained boards where reflow compatibility is required. |
| LM339B | Same B-version core, but rated for −40°C to +85°C (not +125°C); otherwise identical offset, speed, and supply specs | Commercial/industrial ambient environments only; not qualified for extended-temperature automotive or factory automation deployments | Choose LM339B when ambient operating temperature stays below 85°C and cost-sensitive commercial designs prioritize lower unit price. |
Compared with LM2901B and LM339B, LM2901NG4 offers through-hole manufacturability and full −40°C to +125°C qualification - making it optimal for legacy-replacement, repair, and high-reliability industrial control applications where thermal margin and mechanical robustness are critical.
Availability
LM2901NG4 is available at Aetrix Electronics and suitable for motor drive feedback, server PSU monitoring, and industrial temperature control requiring stable component supply across long product lifecycles and high-volume production ramps.
Supply support for LM2901NG4 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.
The LM2901NG4 belongs to TI's industry-standard quad comparator product line, engineered for reliability, wide supply range, and seamless drop-in replacement across decades of legacy designs in power management and safety-critical systems.
FAQ
What is the maximum supply voltage rating for LM2901NG4?
The LM2901NG4 has an absolute maximum supply voltage rating of 38 V, with recommended operating range from 2 V to 36 V. This allows direct integration into 24 V industrial systems and 36 V battery-powered equipment without external regulation, while maintaining full electrical performance across the entire range.
Does LM2901NG4 support rail-to-rail input operation?
Yes, LM2901NG4 supports rail-to-rail input common-mode voltage range, including ground (V−) and extending to VCC − 2 V. Either input can go up to VCC without damage, and one input may remain within the valid common-mode range while the other exceeds it - enabling flexible sensing topologies such as low-side shunt monitoring.
Is LM2901NG4 pin-compatible with older LM2901 variants?
Yes, LM2901NG4 is a drop-in replacement for LM2901, LM2901A, and LM2901V in PDIP-14 packaging. It retains identical pinout, electrical interface, and functional behavior while improving input offset voltage (±0.37 mV typ), ESD rating (2 kV HBM), and temperature range (−40°C to +125°C).
What output configuration does LM2901NG4 use?
LM2901NG4 uses open-collector outputs on all four comparators. Each output requires an external pull-up resistor to define the logic HIGH level, supporting interface with TTL, MOS, CMOS, or mixed-voltage systems. Output sink capability is 21 mA at 1.5 V saturation, enabling direct drive of LEDs or small relays.
What is the guaranteed operating temperature range for LM2901NG4?
The LM2901NG4 is specified for continuous operation from −40°C to +125°C ambient temperature. This extended industrial temperature grade makes it suitable for under-hood automotive subsystems, factory automation controllers, and outdoor-rated power conversion equipment where thermal resilience is mandatory.
LM2901NG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 30V, ±1V ~ 15V
- :
- 7mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 2.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 14-PDIP
LM2901NG4 FAQ
1.How can I place an order for LM2901NG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2901NG4 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 LM2901NG4 reliable?
The price and inventory of LM2901NG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2901NG4 is usually 5 days.
3.What payment methods are accepted for LM2901NG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2901NG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2901NG4?
LM2901NG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2901NG4 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 LM2901NG4?
For technical support, including LM2901NG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2901NG4 requirements.
6.How does Aetrix verify that LM2901NG4 is sourced from the original manufacturer or authorized distributors?
All LM2901NG4 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 LM2901NG4 meets industry standards.
7.What is the process for return or replacement of LM2901NG4?
All LM2901NG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM2901NG4, 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 LM2901NG4 part is unused and in its original packaging.
Return procedure for LM2901NG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2901NG4 Tags
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