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Texas Instruments LM2901DRE4
- Part No.:
- LM2901DRE4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2901DRE4.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,673
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Product details
Overview
LM2901DRE4 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, 1 µs propagation delay, 2 kV HBM ESD rating, and rail-to-rail input common-mode range extending to ground - used in motor drive overcurrent detection, server PSU voltage monitoring, and industrial PLC analog threshold sensing.
For engineers reviewing the LM2901DRE4 datasheet, LM2901DRE4 pinout, LM2901DRE4 application, or LM2901DRE4 equivalent, this page delivers verified electrical specs, SOIC-14 package details, temperature-rated performance (–40°C to +125°C), output compatibility with TTL/MOS/CMOS logic families, and drop-in replacement guidance versus legacy LM2901 variants.
Technical Context
The LM2901DRE4 implements four independent open-collector comparators with internal ESD clamps enabling 2 kV HBM robustness. Its input stage supports common-mode voltages down to ground and up to VCC – 2 V, while differential input range spans ±38 V - allowing direct interface with high-side current-sense amplifiers or battery-monitoring dividers without level-shifting.
Quiescent current remains stable at 0.8–1.6 mA across 5 V–36 V supply and full temperature range, and output sink capability reaches 21 mA at 1.5 V saturation - enabling direct driving of LEDs, optocouplers, or logic-level MOSFET gates without external pull-up resistors in low-power configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input industrial and automotive power rails without regulation. |
| Input Offset Voltage (max) | ±5.5 mV over –40°C to +125°C - enables accurate threshold detection in precision voltage monitoring. |
| Propagation Delay | 1 µs (typ) at 5 V supply - suitable for real-time fault response in motor control and UPS systems. |
| Input Bias Current (max) | 50 nA over temperature - minimizes error in high-impedance sensor interfaces like thermistor or photodiode circuits. |
| Output Sink Current | 21 mA at VOL = 1.5 V - drives standard LEDs or logic inputs directly without external buffer stages. |
| ESD Rating (HBM) | ±2000 V - meets industrial handling requirements and reduces board-level protection component count. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, factory automation, and telecom infrastructure use. |
Pinout & Package
LM2901DRE4 is housed in a 14-pin SOIC (D) package measuring 8.70 mm × 3.90 mm, with exposed pad not present. Pin functions follow industry-standard quad comparator layout optimized for PCB routing efficiency and noise immunity in mixed-signal systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector output requiring external pull-up; sinks up to 21 mA for direct logic interfacing. |
| 2 (IN2–) | Comparator 2 inverting input | Accepts signals down to ground; supports single-supply sensor signal conditioning. |
| 3 (IN2+) | Comparator 2 non-inverting input | Paired with IN2– for differential threshold comparison; common-mode range includes ground. |
| 4 (IN1–) | Comparator 1 inverting input | Matches IN2– function; identical electrical characteristics across all four channels. |
| 5 (IN1+) | Comparator 1 non-inverting input | Enables reference-based triggering; compatible with resistor-divider or DAC-generated thresholds. |
| 6 (VCC) | Positive supply | Single rail input; powers all four comparators; no separate ground reference required for inputs. |
| 7 (OUT2) | Comparator 2 output | Electrically identical to OUT1; supports independent channel configuration per application need. |
| 8 (IN3–) | Comparator 3 inverting input | Third channel input; maintains same offset, bias, and speed specs as channels 1 and 2. |
| 9 (IN3+) | Comparator 3 non-inverting input | Used for multi-threshold detection, e.g., window comparators or sequential state monitoring. |
| 10 (IN4–) | Comparator 4 inverting input | Fourth channel input; fully independent; allows redundant sensing or multi-zone alarm logic. |
| 11 (IN4+) | Comparator 4 non-inverting input | Supports simultaneous evaluation of four analog conditions, such as phase loss, overvoltage, undervoltage, and overtemperature. |
| 12 (GND) | Negative supply / reference | System ground return; all inputs referenced to this node; no negative supply needed. |
| 13 (OUT4) | Comparator 4 output | Open-collector output; shares same sink strength and voltage compliance as other outputs. |
| 14 (OUT3) | Comparator 3 output | Completes quad output set; enables compact implementation of 4-channel decision logic. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs at ground or up to VCC – 2 V - eliminates need for level shifters in single-supply systems. |
| 2 kV HBM ESD protection | Dedicated on-chip clamps reduce susceptibility to handling damage and improve field reliability without added TVS diodes. |
| 1 µs propagation delay | Enables sub-microsecond fault detection in safety-critical applications like motor stall or short-circuit shutdown. |
| 0.8–1.6 mA quiescent current | Stable supply current across voltage and temperature - simplifies power budgeting in always-on industrial controllers. |
| Open-collector outputs | Allows wired-OR logic, mixed-voltage interfacing, and flexible pull-up selection (e.g., 3.3 V or 5 V logic domains). |
Applications
| Motor Drive Protection | Server Power Supply Monitoring |
|---|---|
|
Use Scenario: Real-time detection of phase current imbalance or overcurrent events in BLDC motor inverters. IC Role / Device Role / Timing Role: Quad comparator monitors shunt voltage drops across three phases plus DC-link, triggering immediate gate shutdown via FPGA or MCU interrupt. Use Value: 1 µs response time ensures IGBT/MOSFET turn-off before destructive energy accumulation; ±5.5 mV offset enables <1% current-sense accuracy. |
Use Scenario: Simultaneous monitoring of +12 V, +5 V, +3.3 V, and standby 5 V rails in enterprise-grade server PSUs. IC Role / Device Role / Timing Role: Each comparator compares a regulated rail against a precision reference to assert individual PGOOD signals or a consolidated FAULT line. Use Value: Rail-to-rail input range accepts unattenuated rail voltages; open-collector outputs enable direct OR-ing into system management controller. |
| Industrial PLC Analog Thresholding | Wireless Infrastructure Power Sequencing |
|
Use Scenario: Converting 4–20 mA sensor loops and 0–10 V analog inputs into discrete digital alarms for temperature, pressure, or flow thresholds. IC Role / Device Role / Timing Role: Configured as window, over/under, or multi-level comparators to generate status bits fed to PLC digital input modules. Use Value: 50 nA max input bias current prevents loading of high-Z sensor outputs; –40°C to +125°C rating ensures operation in harsh cabinet environments. |
Use Scenario: Controlling power-up sequence of RF transceiver ASICs, FEMs, and baseband processors in 5G small cells. IC Role / Device Role / Timing Role: Monitors DC-DC converter outputs to enable downstream regulators only after upstream rails stabilize within tolerance. Use Value: Four independent channels replace multiple dual comparators, reducing BOM count and PCB area; 2 kV ESD withstand protects against assembly-line discharge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2901DR | Same SOIC-14 package and pinout; identical electrical specs but rated for –40°C to +125°C with lower ESD (1.5 kV HBM vs. 2 kV). | Valid for cost-sensitive industrial designs where full 2 kV ESD margin is not required. | Select LM2901DR when ESD robustness beyond 1.5 kV is unnecessary and qualification documentation is streamlined. |
| LM2901BDR | B-version with improved 0.37 mV typ offset (vs. 1–2 mV typ for LM2901), 1 µs delay (vs. 1.3 µs), and guaranteed 2 kV HBM - same footprint. | Drop-in upgrade path for legacy LM2901 designs needing tighter offset or faster response without layout change. | Choose LM2901BDR for new designs targeting enhanced accuracy or timing-critical fault detection where LM2901DRE4's spec margin is insufficient. |
Compared with LM2901DR and LM2901BDR, LM2901DRE4 offers identical mechanical compatibility but distinguishes itself with TI's enhanced manufacturing traceability (E4 suffix), consistent 2 kV HBM rating, and production-tested performance across full temperature range - making it optimal for high-reliability OEM programs.
Availability
LM2901DRE4 is available at Aetrix Electronics and suitable for motor drive protection, server PSU monitoring, and industrial PLC analog thresholding requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2901DRE4 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 50 years of innovation in precision analog ICs and industrial-grade components.
LM2901DRE4 belongs to TI's legacy-compatibility quad comparator product line, engineered for robust single-supply operation in industrial control, power management, and safety-critical monitoring systems.
FAQ
What is the maximum supply voltage rating for LM2901DRE4?
The LM2901DRE4 supports an absolute maximum supply voltage of 38 V, with recommended operating range from 2 V to 36 V. This wide range allows direct integration into 24 V industrial buses and 36 V battery systems without external regulation, and its differential input voltage rating of ±38 V permits safe interface with high-side current-sense amplifiers. The LM2901DRE4 maintains stable operation across this full span while delivering consistent 1 µs propagation delay and <2 mV offset drift.
Does LM2901DRE4 support rail-to-rail input operation?
Yes, the LM2901DRE4 features a rail-to-rail input common-mode voltage range that includes ground and extends up to VCC – 2 V. This allows direct connection of sensors, resistive dividers, or DAC outputs without level-shifting circuitry. Both inputs of each comparator can independently operate at ground potential or near VCC, enabling flexible configurations such as high-side voltage monitoring or zero-crossing detection - all while maintaining specified offset and bias performance across –40°C to +125°C.
Is LM2901DRE4 pin-compatible with older LM2901 variants?
Yes, LM2901DRE4 is pin-compatible with standard LM2901 SOIC-14 variants including LM2901DR and LM2901N. It uses identical 14-pin SOIC (D) packaging and matches the industry-standard quad comparator pinout: pins 1/7/13/14 are open-collector outputs, pins 2–5/8–11 are inputs, pin 6 is VCC, and pin 12 is GND. No PCB redesign is needed when upgrading from legacy LM2901 to LM2901DRE4, preserving layout integrity while gaining improved ESD robustness and tighter offset specifications.
What logic families are compatible with LM2901DRE4 outputs?
The LM2901DRE4 open-collector outputs are compatible with TTL, MOS, and CMOS logic families. When paired with appropriate pull-up resistors (e.g., 4.7 kΩ to 3.3 V or 5 V), they interface directly with microcontroller GPIOs, FPGA inputs, optocoupler LEDs, or discrete transistor bases. Output sink current of up to 21 mA at 1.5 V saturation ensures reliable low-state drive across voltage domains, and the absence of internal pull-ups provides design flexibility for mixed-voltage system integration without level translators.
How does LM2901DRE4 differ from LM2901BDR?
The LM2901DRE4 and LM2901BDR share the same SOIC-14 package and pinout but differ in specification grade and test coverage. LM2901BDR is the "B-version" with improved typical input offset (±0.37 mV vs. ±1–2 mV), faster 1 µs response (vs. 1.3 µs for non-B), and guaranteed 2 kV HBM. LM2901DRE4 reflects TI's enhanced traceability and screening - the "E4" suffix denotes extended quality validation and lot-level traceability, making it preferred for high-reliability industrial and automotive-adjacent applications where documentation rigor is mandatory alongside electrical performance.
LM2901DRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- :
- 14-SOIC
LM2901DRE4 FAQ
1.How can I place an order for LM2901DRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2901DRE4 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 LM2901DRE4 reliable?
The price and inventory of LM2901DRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2901DRE4 is usually 5 days.
3.What payment methods are accepted for LM2901DRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2901DRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2901DRE4?
LM2901DRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2901DRE4 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 LM2901DRE4?
For technical support, including LM2901DRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2901DRE4 requirements.
6.How does Aetrix verify that LM2901DRE4 is sourced from the original manufacturer or authorized distributors?
All LM2901DRE4 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 LM2901DRE4 meets industry standards.
7.What is the process for return or replacement of LM2901DRE4?
All LM2901DRE4 units undergo pre-shipment inspection (PSI). If there is an issue with LM2901DRE4, 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 LM2901DRE4 part is unused and in its original packaging.
Return procedure for LM2901DRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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