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Texas Instruments LM2901MX/NOPB
- Part No.:
- LM2901MX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2901MX/NOPB.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:10,211
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Product details
Overview
LM2901MX/NOPB from Texas Instruments is a quad low-power, low-offset voltage comparator IC designed for single-supply operation in industrial and embedded signal-conditioning circuits. It features ±3 mV max offset voltage, 0.8 mA supply current (independent of supply voltage), 25 nA input bias current, and rail-to-rail input common-mode range including ground - enabling precise threshold detection in battery-powered or ground-referenced sensing applications such as overvoltage protection and level-shifting interfaces.
For engineers reviewing the LM2901MX/NOPB datasheet, LM2901MX/NOPB pinout, LM2901MX/NOPB application, or LM2901MX/NOPB equivalent, key selection considerations include its open-collector outputs compatible with TTL/CMOS/MOS logic, wide 2–36 VDC supply range, −40°C to +85°C operating temperature, and PDIP-14 package suitability for through-hole prototyping and legacy industrial PCBs.
Technical Context
The LM2901MX/NOPB implements four independent high-gain comparators with PNP differential input stages, enabling input voltages down to ground even on single supplies. Its uncommitted NPN output transistors support wired-OR configurations and flexible pull-up voltage selection up to 36 V.
It operates without antisaturation clamps, delivering ultra-low 0.1 nA output leakage in OFF state and 250 mV saturation voltage at 4 mA sink current - critical for low-power switching and precision analog-to-digital conversion stages where load isolation and minimal voltage drop matter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2–36 VDC single supply or ±1 to ±18 VDC dual supply - supports direct interface with 3.3 V, 5 V, 12 V, and 24 V industrial rails. |
| Input Offset Voltage | ±3 mV maximum - enables accurate threshold detection within ±3 mV error across all four channels at 25°C. |
| Supply Current | 0.8 mA typical per device (all four comparators active) - independent of supply voltage, ideal for battery-operated systems. |
| Input Bias Current | 25 nA maximum - minimizes loading on high-impedance reference or sensor sources. |
| Output Saturation Voltage | 250 mV at 4 mA sink - ensures clean LOW-level logic assertion when driving TTL or CMOS inputs via pull-up resistor. |
| Input Common-Mode Range | Includes GND up to V+−1.5 V - allows direct sensing of signals referenced to system ground without level-shifting. |
| Differential Input Voltage | Up to 36 V - permits input signals exceeding supply rail (e.g., 30 V input on 5 V supply) without damage. |
Pinout & Package
LM2901MX/NOPB is supplied in a 14-pin Plastic Dual In-line Package (PDIP) with body size 19.177 mm × 6.35 mm, suitable for through-hole mounting and manual soldering in industrial control and test equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 13, 14 | OUTPUT2 / OUTPUT1 / OUTPUT4 / OUTPUT3 | Open-collector NPN outputs - require external pull-up resistors; support wired-OR logic and mixed-voltage interfacing. |
| 3 | V+ | Positive supply pin - accepts 2–36 VDC; powers all four comparators and bias network. |
| 4, 6, 8, 10 | INPUT1− / INPUT2− / INPUT3− / INPUT4− | Inverting inputs - accept signals down to GND; used for reference or feedback connections. |
| 5, 7, 9, 11 | INPUT1+ / INPUT2+ / INPUT3+ / INPUT4+ | Non-inverting inputs - accept signals down to GND; typically connected to sensed analog signals. |
| 12 | GND | Ground reference - serves as return path for supply and input common-mode range anchor. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation with GND-referenced inputs | Enables direct sensing of 0 V–based signals (e.g., thermistor dividers, current-sense amps) without negative rail or level shifters. |
| Open-collector outputs | Allows flexible logic interfacing (TTL/CMOS/ECL/MOS), wired-OR combining, and pull-up to voltage independent of V+ (e.g., 3.3 V logic on 12 V supply). |
| Low 0.1 nA output leakage | Maintains high-impedance isolation in OFF state - critical for multiplexed sensor buses or low-power sleep modes. |
| 25 nA input bias current | Reduces voltage error in high-Z divider networks and preserves accuracy in precision reference monitoring. |
| 2–36 VDC supply range | Eliminates need for dedicated voltage regulators in multi-rail systems - simplifies power architecture in PLC I/O modules and motor drives. |
Applications
| Overvoltage Protection Circuit | Zero-Crossing Detector |
|---|---|
|
Use Scenario: Monitoring AC line voltage to trigger shutdown before rail exceeds safe limits in power supplies. IC Role / Device Role / Timing Role: Quad comparator compares rectified AC peaks against fixed reference thresholds using two channels for hysteresis and two for latching. Use Value: ±3 mV offset ensures consistent trip point across temperature; open-collector outputs drive optocoupler directly without level-shifting. |
Use Scenario: Detecting AC waveform zero crossings in TRIAC-based lighting dimmers or motor phase control. IC Role / Device Role / Timing Role: One comparator channel compares AC signal to GND reference; remaining channels implement noise-immune hysteresis and debounced output. Use Value: Input common-mode range including GND enables direct AC coupling; 250 mV saturation voltage guarantees reliable TTL-compatible LOW pulse generation. |
| Industrial Limit Comparator | Simple Analog-to-Digital Converter |
|
Use Scenario: Verifying sensor outputs (e.g., pressure, temperature) remain within factory-set safety bands in HVAC controllers. IC Role / Device Role / Timing Role: Four comparators configured as window detector - two set upper/lower bounds, two generate ANDed pass/fail flags. Use Value: 0.8 mA total supply current enables always-on monitoring in energy-constrained edge devices; PDIP-14 eases field-replaceability. |
Use Scenario: Converting linear potentiometer position into 2-bit resolution digital code for basic user interface feedback. IC Role / Device Role / Timing Role: Each comparator digitizes one bit by comparing wiper voltage to binary-weighted reference ladder. Use Value: Rail-to-rail input range captures full 0–V+ pot sweep; ±3 mV offset minimizes quantization error in coarse ADC implementation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | SOIC-14 package; identical electrical specs but rated for 0°C to +70°C ambient (vs. LM2901MX/NOPB's −40°C to +85°C). | Suitable for commercial-grade consumer electronics; not qualified for extended industrial temperature range. | Select LM339DR only if operating environment stays within 0–70°C and surface-mount assembly is required. |
| LM2901DT | SOIC-14 package; same −40°C to +85°C rating, but specified with 7 mV max input offset voltage (vs. 3 mV for LM2901MX/NOPB). | Acceptable for less precision-critical applications like basic voltage monitoring where ±7 mV error is tolerable. | Choose LM2901DT when cost-sensitive SMT design prioritizes footprint over tight offset tolerance. |
Compared with LM339DR and LM2901DT, LM2901MX/NOPB delivers tighter ±3 mV offset and guaranteed −40°C to +85°C operation in a through-hole PDIP package - making it optimal for ruggedized industrial controls where precision, thermal reliability, and serviceability are mandatory.
Availability
LM2901MX/NOPB is available at Aetrix Electronics and suitable for industrial automation, power supply supervision, and embedded sensor interface applications requiring stable component supply and long-term manufacturability.
Supply support for LM2901MX/NOPB 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 decades of expertise in precision analog ICs and industrial-grade components.
The LM2901MX/NOPB belongs to TI's LMx39-N series of quad comparators, engineered specifically for robust single-supply operation in harsh environments - emphasizing low power, rail-to-rail input capability, and open-collector flexibility for industrial signal conditioning.
FAQ
What is the operating temperature range of the LM2901MX/NOPB?
The LM2901MX/NOPB is rated for continuous operation from −40°C to +85°C ambient temperature. This extended industrial temperature range makes it suitable for deployment in demanding environments such as factory automation, motor control cabinets, and outdoor instrumentation where thermal stability is critical. The LM2901MX/NOPB maintains its ±3 mV input offset voltage specification across this full range.
Does the LM2901MX/NOPB require dual power supplies?
No, the LM2901MX/NOPB is explicitly designed for single-supply operation from 2 VDC to 36 VDC, with input common-mode voltage range extending down to GND. While dual-supply operation (±1 V to ±18 V) is supported, it is not required. Its PNP input stage enables true ground-sensing capability - eliminating the need for negative rails in most industrial threshold-detection applications.
Can the LM2901MX/NOPB drive TTL and CMOS logic directly?
Yes, the LM2901MX/NOPB's open-collector outputs are fully compatible with TTL, DTL, ECL, MOS, and CMOS logic families when used with appropriate external pull-up resistors. With a 5 V pull-up, it delivers a saturated LOW of ≤250 mV at 4 mA sink current - well within TTL's 0.8 V VIH threshold - and an open HIGH that can be pulled to any logic rail up to 36 V, enabling mixed-voltage system interfacing.
What is the maximum differential input voltage the LM2901MX/NOPB can tolerate?
The LM2901MX/NOPB supports a differential input voltage of up to 36 VDC - meaning either input may exceed the positive supply rail (e.g., a 30 V signal on a 5 V supply) without damage, provided the other input remains within the common-mode range (0 V to V+−1.5 V). However, input voltages must not go below −0.3 VDC relative to GND to avoid forward-biasing internal clamp diodes.
Is the LM2901MX/NOPB pin-compatible with other LM339-family devices?
Yes, the LM2901MX/NOPB shares identical pinout and function mapping with LM139-N, LM239-N, LM339-N, and LM3302-N in PDIP-14 and SOIC-14 packages. All devices use the same 14-pin configuration: outputs on pins 1,2,13,14; inputs on pins 4–11; V+ on pin 3; and GND on pin 12. This allows direct substitution in existing designs where temperature or offset specifications align.
LM2901MX/NOPB 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 ~ 36V, ±1V ~ 18V
- :
- 7mV @ 30V
- 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 ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
LM2901MX/NOPB FAQ
1.How can I place an order for LM2901MX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2901MX/NOPB 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 LM2901MX/NOPB reliable?
The price and inventory of LM2901MX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2901MX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2901MX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2901MX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2901MX/NOPB?
LM2901MX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2901MX/NOPB 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 LM2901MX/NOPB?
For technical support, including LM2901MX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2901MX/NOPB requirements.
6.How does Aetrix verify that LM2901MX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2901MX/NOPB 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 LM2901MX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2901MX/NOPB?
All LM2901MX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2901MX/NOPB, 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 LM2901MX/NOPB part is unused and in its original packaging.
Return procedure for LM2901MX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2901MX/NOPB 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
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