My Inquiry
My Account
Texas Instruments LM2901DE4
- Part No.:
- LM2901DE4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2901DE4.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,078
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2901DE4 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 capability down to ground - deployed in server PSUs, motor drives, and industrial automation control loops.
For engineers reviewing the LM2901DE4 datasheet, LM2901DE4 pinout, LM2901DE4 application, or LM2901DE4 equivalent, this page delivers verified electrical specs, package-confirmed pin functions, real-world use cases, and two validated alternative parts with documented functional and thermal differences.
Technical Context
The LM2901DE4 implements four independent open-collector comparators with common-mode input range extending to ground and differential input tolerance up to ±38 V. Its architecture supports direct interface with TTL, MOS, and CMOS logic without level-shifting.
It operates over –40°C to +125°C ambient temperature, draws only 0.8–1.6 mA total quiescent current (vs. supply voltage), and maintains low output saturation voltage (≤400 mV at 4 mA sink) - enabling robust threshold detection in noisy, wide-voltage industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports direct integration into 3.3 V, 5 V, 12 V, and 24 V systems without regulators |
| Input Offset Voltage (max) | ±5.5 mV over –40°C to +125°C - ensures stable trip-point accuracy across automotive and industrial thermal ranges |
| Propagation Delay | 1 µs (typ) at 5 V - enables fast response to overvoltage/undervoltage events in power supply supervision |
| Input Bias Current (max) | 25 nA at –40°C to +125°C - minimizes error in high-impedance sensor interfaces (e.g., thermistor or RTD networks) |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 requirements for board-level robustness in factory automation equipment |
| Output Sink Current | 21 mA (min) per channel - drives LEDs, relays, or logic inputs directly without external buffers |
| Common-Mode Input Range | Ground to (VCC – 2 V) - allows direct sensing of signals referenced to system ground in single-supply configurations |
Pinout & Package
LM2901DE4 is packaged in a 14-pin SOIC (D package) with nominal body size 8.70 mm × 3.90 mm, surface-mount compatible, and RoHS-compliant.
| 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; tolerant of voltages up to VCC |
| 3 | IN1+ | Non-inverting input of Comparator 1 - same voltage range and ruggedness as IN1− |
| 4 | VCC | Positive supply pin - powers all four comparators; decoupling capacitor recommended near pin |
| 5 | OUT2 | Open-collector output of Comparator 2 - electrically isolated from OUT1; shares no internal circuitry |
| 6 | IN2− | Inverting input of Comparator 2 - fully independent; supports differential sensing with IN2+ |
| 7 | IN2+ | Non-inverting input of Comparator 2 - identical electrical characteristics to IN1+ and IN1− |
| 8 | GND | Reference ground for all comparators and supply return - must be low-impedance connection to system ground plane |
| 9 | IN3+ | Non-inverting input of Comparator 3 - enables three independent threshold comparisons on shared supply |
| 10 | IN3− | Inverting input of Comparator 3 - supports hysteresis implementation via feedback resistor |
| 11 | OUT3 | Open-collector output of Comparator 3 - sinks current when IN3+ > IN3−; otherwise high-impedance |
| 12 | IN4+ | Non-inverting input of Comparator 4 - completes full quad functionality for multi-zone monitoring |
| 13 | IN4− | Inverting input of Comparator 4 - allows simultaneous comparison of four independent analog conditions |
| 14 | OUT4 | Open-collector output of Comparator 4 - independently controllable; no crosstalk with other outputs |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs at ground potential - eliminates need for level-shifting in low-side current sensing |
| Drop-in replacement for LM2901/LM339 | Pin-compatible and functionally equivalent to legacy LM2901 variants - no PCB or firmware changes required |
| Low quiescent current (0.8–1.6 mA) | Enables always-on monitoring in battery-backed or energy-constrained systems without significant standby drain |
| 2 kV HBM ESD protection | Reduces risk of field failure during handling or in electrostatic-prone environments like factory floors |
| ±38 V differential input rating | Withstands transient overvoltages beyond supply rails - critical for motor drive fault detection and surge immunity |
Applications
| Server Power Supply Monitoring | Industrial Motor Drive Protection |
|---|---|
|
Use Scenario: Real-time monitoring of +12 V, +5 V, +3.3 V, and –12 V rails in redundant server PSUs to trigger shutdown on out-of-tolerance conditions. IC Role / Device Role / Timing Role: Quad comparator performs independent voltage window comparisons with hysteresis; each channel drives dedicated fault latches. Use Value: Enables sub-millisecond response to overvoltage/undervoltage faults, meeting ATX and EPS12V specification timing requirements. |
Use Scenario: Detecting phase loss, overcurrent, and thermal overload in 3-phase inverter gate driver circuits for HVAC compressors. IC Role / Device Role / Timing Role: Compares isolated current-sense amplifier outputs against fixed thresholds; outputs feed FPGA interrupt pins. Use Value: Delivers deterministic <1 µs latency from fault onset to protection signal - prevents IGBT destruction during short-circuit events. |
| Factory Automation Sensor Interface | Building Management System (BMS) Threshold Logic |
|
Use Scenario: Converting analog outputs from pressure, flow, and temperature transmitters into discrete ON/OFF control signals for PLC inputs. IC Role / Device Role / Timing Role: Four independent comparators condition sensor signals before feeding digital logic; GND-referenced inputs simplify wiring. Use Value: Eliminates need for external op-amps or ADCs in simple go/no-go decisions - reduces BOM cost and board space by >30%. |
Use Scenario: Implementing occupancy-based HVAC staging, CO₂-triggered ventilation, and chiller freeze-protection logic in commercial buildings. IC Role / Device Role / Timing Role: LM2901DE4 compares environmental sensor outputs to programmable reference voltages generated by DACs. Use Value: Supports wide-input-voltage operation (2–36 V) to interface directly with 24 VDC building control buses without regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2901BDR | Same B-version silicon, identical electrical specs, but in 14-pin SOIC with green molding compound (RoHS-compliant, halogen-free) | No functional difference; used where halogen-free compliance is mandated for aerospace or EU public infrastructure projects | Select LM2901BDR when halogen-free certification (IEC 61249-2-21) is contractually required. |
| LM339BDR | Same B-version performance, but rated for –40°C to +85°C (not +125°C); otherwise identical offset, speed, and supply specs | Suitable for commercial-grade server PSUs or consumer appliances where extended temperature is not needed | Choose LM339BDR for cost-sensitive designs operating strictly within 0–85°C ambient, with no under-hood or industrial enclosure requirements. |
Compared with LM2901BDR and LM339BDR, the LM2901DE4 provides identical comparator performance and pinout but is specified for the full industrial temperature range (–40°C to +125°C), making it the only option qualified for under-hood automotive modules or high-temperature factory controllers without derating.
Availability
LM2901DE4 is available at Aetrix Electronics and suitable for server PSU design, motor drive protection, and factory automation sensor conditioning requiring stable component supply across long production lifecycles.
Supply support for LM2901DE4 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, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The LM2901DE4 belongs to TI's precision comparator product line, engineered specifically for reliable voltage threshold detection in harsh, wide-temperature industrial environments where legacy LM2901 variants were historically deployed.
FAQ
What is the maximum supply voltage rating for LM2901DE4?
The LM2901DE4 supports an absolute maximum supply voltage of 38 V, with recommended operating range from 2 V to 36 V. This allows direct use in 24 V industrial systems and 36 V battery-powered equipment without voltage regulation. Exceeding 38 V risks permanent damage per Absolute Maximum Ratings table in the TI datasheet SLCS006Z.
Does LM2901DE4 support rail-to-rail input operation?
Yes, the LM2901DE4 features a common-mode input voltage range that includes ground (V–) and extends to (VCC – 2 V). Either input can reach VCC without damage, and one input may operate outside the valid common-mode range while the other remains within it - enabling true single-supply, ground-referenced sensing in LM2901DE4 applications.
Is LM2901DE4 pin-compatible with older LM2901 variants?
Yes, LM2901DE4 is a drop-in replacement for LM2901, LM2901A, and LM2901V in the 14-pin SOIC (D) package. Pin assignments, electrical behavior, and footprint match exactly - no PCB redesign or layout change is needed when upgrading to the B-version silicon in LM2901DE4.
What is the typical propagation delay of LM2901DE4 at 5 V supply?
The LM2901DE4 exhibits a typical propagation delay of 1 µs for small-signal transitions (100 mV step with 5 mV overdrive) and 300 ns for TTL-level input steps at 5 V supply, per Section 6.13 of the SLCS006Z datasheet. This makes LM2901DE4 suitable for fast-response power sequencing and fault detection circuits.
Can LM2901DE4 outputs drive LEDs directly?
Yes, each open-collector output of LM2901DE4 can sink up to 21 mA (minimum) at VOL ≤ 400 mV, sufficient to drive standard indicator LEDs with appropriate series resistors. For example, with a 5 V pull-up and 2 mA LED current, a 2.2 kΩ resistor achieves safe biasing - confirmed by LM2901DE4 IOL and VOL specifications.
LM2901DE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- :
- 14-SOIC
LM2901DE4 FAQ
1.How can I place an order for LM2901DE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2901DE4 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 LM2901DE4 reliable?
The price and inventory of LM2901DE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2901DE4 is usually 5 days.
3.What payment methods are accepted for LM2901DE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2901DE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2901DE4?
LM2901DE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2901DE4 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 LM2901DE4?
For technical support, including LM2901DE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2901DE4 requirements.
6.How does Aetrix verify that LM2901DE4 is sourced from the original manufacturer or authorized distributors?
All LM2901DE4 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 LM2901DE4 meets industry standards.
7.What is the process for return or replacement of LM2901DE4?
All LM2901DE4 units undergo pre-shipment inspection (PSI). If there is an issue with LM2901DE4, 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 LM2901DE4 part is unused and in its original packaging.
Return procedure for LM2901DE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2901DE4 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…
