My Inquiry
My Account
Texas Instruments LM2901DRG4
- Part No.:
- LM2901DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2901DRG4.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,401
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2901DRG4 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 common-mode input range extending to ground - used in server PSU overvoltage detection, motor drive current sensing, and industrial PLC analog threshold monitoring.
For engineers reviewing the LM2901DRG4 datasheet, LM2901DRG4 pinout, LM2901DRG4 application, or LM2901DRG4 equivalent, this page delivers verified electrical specs, SOIC-14 package details, real-world use cases, and two validated alternative parts with functional and thermal differentiation.
Technical Context
The LM2901DRG4 implements four independent open-collector comparators with internal ESD clamps, enabling robust input handling up to ±38 V differential voltage and operation down to ground on either input. Its architecture supports direct TTL/MOS/CMOS interfacing without level-shifting.
It operates across –40°C to +125°C ambient temperature, draws only 0.8–1.2 mA total quiescent current (independent of supply voltage), and maintains stable propagation delay under varying load and temperature conditions per TI's B-version specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct integration into 3.3 V, 5 V, 12 V, and 24 V industrial power rails without regulation. |
| Input Offset Voltage (typ) | ±0.37 mV - ensures accurate threshold detection at low signal differentials, critical for precision sensor interfaces. |
| Propagation Delay (typ) | 1 µs - supports fast response in overcurrent protection and PWM feedback loops up to ~300 kHz. |
| Input Bias Current (max) | 25 nA - minimizes loading error on high-impedance sources like thermistors or photodiodes. |
| ESD Rating (HBM) | 2000 V - meets industrial IEC 61000-4-2 Level 2 requirements without external protection. |
| Common-Mode Input Range | Ground to (VCC – 2 V) - allows direct sensing of signals referenced to system ground in single-supply systems. |
| Output Sink Current | 21 mA - drives standard LED indicators, relay coils, or logic inputs without external buffers. |
Pinout & Package
LM2901DRG4 is housed in a 14-pin SOIC (D) package measuring 8.70 mm × 3.90 mm, with exposed pad omitted - suitable for standard reflow and wave soldering processes.
| 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-level interfacing. |
| 2 (IN2–) | Comparator 2 inverting input | Accepts signals down to ground; differential input voltage tolerance up to ±38 V relative to IN2+. |
| 3 (IN2+) | Comparator 2 non-inverting input | Used for reference voltage comparison; common-mode range includes ground and extends to VCC – 2 V. |
| 4 (IN1–) | Comparator 1 inverting input | Matches IN2– function; electrically identical but assigned to channel 1 per TI pin naming convention. |
| 5 (IN1+) | Comparator 1 non-inverting input | Paired with IN1–; supports rail-to-rail input operation without phase inversion risk. |
| 6 (VCC) | Positive supply | Single supply input; powers all four comparators; no separate ground pin required for biasing. |
| 7 (OUT2) | Comparator 2 output | Independent open-collector output; shares no internal connection with OUT1 or other outputs. |
| 8 (IN3–) | Comparator 3 inverting input | Third channel input; identical electrical behavior to IN1–/IN2–; supports multi-threshold monitoring. |
| 9 (IN3+) | Comparator 3 non-inverting input | Third channel reference input; enables simultaneous comparison against three distinct thresholds. |
| 10 (IN4–) | Comparator 4 inverting input | Fourth channel input; fully isolated from other channels; supports redundant or auxiliary sensing. |
| 11 (IN4+) | Comparator 4 non-inverting input | Final reference input; completes quad-channel capability for complex state-machine or fault-detection logic. |
| 12 (GND) | Negative supply / reference | System ground return; all internal biasing and output sinking referenced to this node. |
| 13 (OUT4) | Comparator 4 output | Fourth open-collector output; capable of driving discrete loads or wired-OR logic buses. |
| 14 (OUT3) | Comparator 3 output | Third output; electrically independent; supports parallel or cascaded comparator configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in replacement for LM2901/LM339 | Pin-compatible with legacy SOIC-14 footprints and functionally identical interface behavior - no PCB change required. |
| Extended temperature range | Rated for –40°C to +125°C ambient operation - qualified for under-hood automotive and industrial control environments. |
| Low input offset drift | ±5.5 mV max over full temperature range - maintains accuracy in thermal cycling applications without recalibration. |
| Robust input stage | Dedicated ESD clamps and ±38 V differential input rating - withstands transient coupling in noisy motor-drive or power-conversion circuits. |
| Supply-current independence | Quiescent current remains stable across 2–36 V supply range - simplifies power budgeting in multi-rail systems. |
Applications
| Server Power Supply Monitoring | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Real-time monitoring of +12 V, +5 V, and +3.3 V rails in redundant server PSUs to trigger shutdown on overvoltage or undervoltage faults. IC Role / Device Role / Timing Role: Quad comparator performs simultaneous threshold comparisons; each channel dedicated to one rail with hysteresis via external feedback. Use Value: Enables sub-1 µs fault response time and eliminates need for microcontroller polling, reducing BOM count and firmware complexity. | Use Scenario: Detecting phase current imbalance and overcurrent events in 3-phase BLDC motor inverters using shunt resistor voltage drops. IC Role / Device Role / Timing Role: LM2901DRG4 compares amplified shunt voltages against programmable thresholds; outputs feed FPGA interrupt pins or gate-driver disable inputs. Use Value: Achieves <1 µs trip latency - faster than MCU-based protection - preventing IGBT shoot-through and thermal runaway. |
| Factory Automation Sensor Interface | Building HVAC Zone Control |
Use Scenario: Converting analog outputs from pressure, temperature, and flow sensors into digital status flags for PLC input modules. IC Role / Device Role / Timing Role: Each comparator digitizes one sensor channel; open-collector outputs interface directly with 24 V DC PLC inputs via pull-up resistors. Use Value: Eliminates need for external level shifters or optocouplers; supports 0–10 V and 4–20 mA sensor standards with minimal external components. | Use Scenario: Monitoring duct static pressure, coil temperature, and occupancy sensor signals in commercial HVAC controllers to modulate fan speed and valve position. IC Role / Device Role / Timing Role: Four comparators implement multi-point setpoint logic (e.g., high-temp alarm, low-pressure lockout, occupancy enable, frost protection). Use Value: Reduces reliance on software-based decision trees; provides deterministic, zero-latency hardware interlocks for safety-critical HVAC functions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2901DT | Same B-version specs, TSSOP-14 package (5.0 mm × 4.4 mm); 13% smaller footprint; higher thermal resistance (RθJA = 136.6°C/W vs. 111.2°C/W). | Better suited for space-constrained PCBs; requires tighter thermal management in high-power-density layouts. | Select LM2901DT when board area is constrained and ambient temperature stays below 105°C. |
| LM339BDR | Identical electrical specs but rated for –40°C to +85°C (vs. +125°C); same SOIC-14 package; lower cost due to reduced temp qualification. | Valid for commercial/industrial equipment not exposed to extended high-temp environments (e.g., office printers, consumer UPS). | Choose LM339BDR where extended temperature range is unnecessary and cost sensitivity is high. |
Compared with LM2901DT and LM339BDR, the LM2901DRG4 uniquely balances industrial-grade temperature range, SOIC-14 manufacturability, and thermal performance - making it optimal for automotive-adjacent and high-reliability embedded control designs where layout flexibility and long-term stability are prioritized over minimal footprint or lowest unit cost.
Availability
LM2901DRG4 is available at Aetrix Electronics and suitable for server PSU monitoring, industrial motor drive protection, and factory automation sensor interface applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for LM2901DRG4 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 specializing in analog and embedded processing technologies, with over 90 years of innovation in precision analog ICs and industrial-grade components.
The LM2901DRG4 belongs to TI's B-version quad comparator product line, engineered to replace legacy LM2901/LM339 with improved offset, speed, ESD robustness, and temperature range - targeting high-reliability industrial, automotive, and computing power systems.
FAQ
What is the maximum supply voltage for LM2901DRG4?
The LM2901DRG4 supports a maximum supply voltage of 36 V, with absolute maximum rating up to 38 V. This allows direct operation from unregulated 24 V industrial rails or rectified AC supplies without pre-regulation - confirmed in Section 6.1 of the TI datasheet SLCS006Z.
Does LM2901DRG4 have rail-to-rail input capability?
Yes, the LM2901DRG4 features a common-mode input voltage range that includes ground and extends to (VCC – 2 V), enabling true rail-to-rail operation on the lower end. Either input can go to VCC without damage, and proper output states are maintained as long as at least one input remains within the valid common-mode window - per Section 6.4 and 6.7 of the datasheet.
Is LM2901DRG4 pin-compatible with older LM2901 variants?
Yes, LM2901DRG4 is a drop-in replacement for LM2901, LM339, and LM239 in SOIC-14 packages. Pin assignments, electrical behavior, and functional block diagram match exactly - confirmed in TI's "B-version is drop-in replacement" statement (Section 1) and Pin Configuration Figure 5-1.
What output configuration does LM2901DRG4 use?
The LM2901DRG4 uses open-collector outputs on all four channels, requiring external pull-up resistors to define logic-high voltage levels. Each output can sink up to 21 mA, supporting direct interfacing with TTL, CMOS, and MOS logic families - specified in Sections 6.7 and 6.8 under IOL and output compatibility notes.
What is the operating temperature range of LM2901DRG4?
The LM2901DRG4 is rated for operation from –40°C to +125°C ambient temperature, qualifying it for under-hood automotive, industrial control cabinets, and high-power computing environments - explicitly stated in the Family Comparison Table and Section 6.4 Recommended Operating Conditions.
LM2901DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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:
- 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
LM2901DRG4 FAQ
1.How can I place an order for LM2901DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2901DRG4 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 LM2901DRG4 reliable?
The price and inventory of LM2901DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2901DRG4 is usually 5 days.
3.What payment methods are accepted for LM2901DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2901DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2901DRG4?
LM2901DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2901DRG4 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 LM2901DRG4?
For technical support, including LM2901DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2901DRG4 requirements.
6.How does Aetrix verify that LM2901DRG4 is sourced from the original manufacturer or authorized distributors?
All LM2901DRG4 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 LM2901DRG4 meets industry standards.
7.What is the process for return or replacement of LM2901DRG4?
All LM2901DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM2901DRG4, 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 LM2901DRG4 part is unused and in its original packaging.
Return procedure for LM2901DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2901DRG4 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…
