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Texas Instruments LM2901N/PB
- Part No.:
- LM2901N/PB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LM2901N/PB.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,736
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Product details
Overview
LM2901N/PB from Texas Instruments is a quad voltage comparator IC with open-collector outputs, designed for single-supply operation from 2 V to 36 V (or ±1 V to ±18 V). It delivers ±3 mV max input offset voltage, 0.8 mA typical supply current per comparator, and input common-mode range extending to ground - enabling precise threshold detection in battery-powered and industrial control systems.
For engineers reviewing the LM2901N/PB datasheet, LM2901N/PB pinout, LM2901N/PB application, or LM2901N/PB equivalent, key selection criteria include its rail-to-rail input capability down to GND, TTL/CMOS-compatible output sinking up to 16 mA, low power consumption suitable for always-on sensing, and PDIP-14 packaging for through-hole prototyping and legacy industrial PCBs.
Technical Context
The LM2901N/PB integrates four independent high-gain comparators with PNP differential input stages, enabling input voltages down to −0.3 V (with clamping) and up to 36 V - exceeding the positive supply rail. Its uncommitted NPN output transistors support wired-OR logic, level-shifting via external pull-up resistors, and direct interface with TTL, DTL, ECL, MOS, and CMOS loads.
Designed for stability without antisaturation clamps, it achieves 0.1 nA typical output leakage in OFF state and 250 mV saturation voltage at 4 mA sink current. Bias current remains constant across supply voltage (2–36 V), ensuring predictable input loading and consistent response time of ≤300 ns for large overdrive signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V DC (single supply) or ±1 V to ±18 V (dual supply) - supports wide-input industrial rails and battery-backed systems. |
| Input Offset Voltage | ±3 mV maximum - enables accurate threshold detection within 3 mV tolerance without trimming. |
| Supply Current | 0.8 mA typical per comparator - allows four-channel comparison with <3.2 mA total draw at 5 V, ideal for low-power monitoring. |
| Input Bias Current | 25 nA maximum - minimizes loading on high-impedance sensor references and voltage dividers. |
| Output Saturation Voltage | 250 mV at 4 mA sink - ensures reliable LOW-level logic assertion even under moderate load conditions. |
| Input Common-Mode Range | Includes GND (0 V) up to V+ −1.5 V - permits direct sensing of signals referenced to system ground in single-supply configurations. |
| Output Configuration | Open-collector NPN - enables flexible level-shifting, wired-OR logic, and compatibility with mixed-voltage logic families. |
Pinout & Package
LM2901N/PB is housed in a 14-pin Plastic Dual In-line Package (PDIP) with body dimensions 19.177 mm × 6.35 mm, optimized for through-hole mounting and manual rework.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 13, 14 | Output (Ch2, Ch1, Ch4, Ch3) | Open-collector NPN outputs - require external pull-up resistors; support wired-OR, level translation, and direct TTL/CMOS drive. |
| 3 | V+ | Positive supply pin - accepts 2–36 V DC or connects to +V in dual-supply mode; powers all four comparators. |
| 12 | GND | Ground reference - serves as return path for supply and input common-mode range extension to 0 V. |
| 4, 5, 6, 7, 8, 9, 10, 11 | Inverting/Non-inverting Inputs (Ch1–Ch4) | Differential input pairs - accept signals from −0.3 V to V+−1.5 V; PNP input stage draws minimal bias current (25 nA). |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation with GND-referenced inputs | Enables direct sensing of 0 V–referenced analog signals (e.g., current-sense shunts, thermistor dividers) without level-shifting circuitry. |
| Low quiescent current (0.8 mA/comparator) | Supports always-on voltage monitoring in battery-operated equipment with multi-year runtime expectations. |
| High input impedance (25 nA bias current) | Preserves accuracy of high-resistance sensor networks and precision voltage references without loading error. |
| Wide output voltage compatibility | Open-collector outputs interface safely with logic families operating at 3.3 V, 5 V, 12 V, or 24 V via appropriate pull-up resistors. |
| Robust input overvoltage tolerance | Withstands differential input voltages up to 36 V - exceeds supply rail - simplifying protection design in noisy industrial environments. |
Applications
| Limit Comparators | Simple Analog-to-Digital Converters (ADCs) |
|---|---|
Use Scenario: Monitoring battery voltage against upper/lower thresholds to trigger charge/discharge control or low-battery alerts. IC Role / Device Role / Timing Role: Quad comparator configured as window detector - two channels compare against high/low reference voltages simultaneously. Use Value: Eliminates need for microcontroller ADC polling; provides deterministic, zero-latency digital flag generation with ±3 mV threshold accuracy. |
Use Scenario: Converting linear temperature sensor output (e.g., LM35) into 1-bit digital steps for coarse thermal management. IC Role / Device Role / Timing Role: Comparator acting as flash ADC front-end - each channel digitizes one voltage band using resistor-ladder references. Use Value: Achieves 4-bit resolution with four LM2901N/PB units and passive components - no clock or timing circuitry required. |
| Pulse & Time Delay Generators | Multivibrators & High-Voltage Logic Gates |
Use Scenario: Generating fixed-duration pulses from edge-triggered events (e.g., encoder index pulses, safety interlock signals). IC Role / Device Role / Timing Role: One-shot multivibrator built using comparator hysteresis and RC timing network - self-triggering on input transition. Use Value: Delivers stable delay times independent of supply voltage due to constant-current bias network - avoids timing drift in 2–36 V systems. |
Use Scenario: Implementing high-voltage AND/OR logic for PLC I/O modules interfacing with 24 V sensors and actuators. IC Role / Device Role / Timing Role: Wired-OR configuration of open-collector outputs - multiple comparators drive shared pull-up to 24 V rail. Use Value: Enables logic-level aggregation without level translators; sustains 16 mA sink per output while maintaining 250 mV saturation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339N | Identical pinout and electrical specs, but rated for 0°C to 70°C (vs. LM2901N/PB's −40°C to 85°C industrial temp range). | Suitable for commercial-grade consumer electronics; not qualified for extended-temperature industrial or automotive use. | Select LM339N only if ambient operating temperature stays within 0–70°C and cost is primary driver. |
| LM239N | Same architecture and package, but specified for −25°C to 85°C operating range and slightly higher input offset (max 7 mV vs. 3 mV). | Acceptable for general-purpose industrial controls where ±7 mV offset is tolerable; lacks LM2901N/PB's tighter offset spec. | Choose LM239N when full −40°C startup is unnecessary and marginal offset increase is acceptable for cost-sensitive designs. |
Compared with LM339N and LM239N, the LM2901N/PB offers guaranteed −40°C to +85°C operation and tighter ±3 mV offset specification - making it the preferred choice for industrial automation, battery management, and embedded systems requiring robust performance across extreme temperatures and precision thresholding.
Availability
LM2901N/PB is available at Aetrix Electronics and suitable for industrial control systems, battery-powered instrumentation, and embedded sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2901N/PB 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 personal electronics markets.
The LM2901N/PB belongs to TI's legacy LMx39-N quad comparator family, engineered for reliability in single-supply industrial sensing, threshold detection, and logic interfacing - emphasizing low power, rail-to-ground input, and open-collector flexibility.
FAQ
What is the operating temperature range of the LM2901N/PB?
The LM2901N/PB is specified for continuous operation from −40°C to +85°C. This industrial-grade temperature range ensures reliable performance in demanding environments such as factory automation controllers, outdoor sensor nodes, and automotive body electronics - unlike the commercial-grade LM339N (0°C to 70°C) or LM239N (−25°C to 85°C). The LM2901N/PB maintains its ±3 mV offset voltage and 0.8 mA supply current specifications across this full range.
Does the LM2901N/PB support single-supply operation with inputs at ground potential?
Yes, the LM2901N/PB explicitly supports single-supply operation with input common-mode voltage ranging from GND (0 V) up to V+ −1.5 V. Its PNP input stage enables true ground-referenced sensing - critical for applications like current-shunt monitoring, thermistor-based temperature measurement, and battery voltage threshold detection. This capability eliminates the need for level-shifting circuitry that would otherwise be required with rail-to-rail input op-amps or comparators lacking GND-compatible inputs.
What is the maximum output sink current for the LM2901N/PB?
The LM2901N/PB can sink up to 16 mA per output transistor while maintaining output saturation voltage below 400 mV (typical 250 mV at 4 mA). This rating holds across the full 2–36 V supply range and −40°C to +85°C temperature range. Exceeding 16 mA risks output transistor desaturation and rising output voltage - so designs requiring higher current should add external buffer transistors or logic gates rather than overloading the LM2901N/PB outputs directly.
Can multiple LM2901N/PB outputs be connected together?
Yes - the LM2901N/PB features open-collector NPN outputs specifically designed for wired-OR configurations. Connecting outputs from multiple comparators (or multiple LM2901N/PB devices) to a shared pull-up resistor implements logical OR, NAND, or window-detection functions without additional logic gates. Ensure the combined sink current does not exceed 16 mA per output leg, and use a pull-up resistor value that limits total current to safe levels under worst-case simultaneous activation.
Is the LM2901N/PB pin-compatible with other LMx39-N series comparators?
Yes, the LM2901N/PB shares identical PDIP-14 pinout and electrical functionality with LM139N, LM239N, and LM339N - including pin assignments for V+, GND, four input pairs, and four open-collector outputs. However, differences exist in temperature rating (LM2901N/PB: −40°C to 85°C), input offset voltage (±3 mV max vs. ±7 mV or ±9 mV), and supply current consistency across voltage - so direct substitution requires verification of these parameters in the target application.
LM2901N/PB 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 ~ 32V, ±1V ~ 16V
- :
- 7mV @ 5V
- 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 ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 14-PDIP
LM2901N/PB FAQ
1.How can I place an order for LM2901N/PB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2901N/PB 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 LM2901N/PB reliable?
The price and inventory of LM2901N/PB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2901N/PB is usually 5 days.
3.What payment methods are accepted for LM2901N/PB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2901N/PB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2901N/PB?
LM2901N/PB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2901N/PB 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 LM2901N/PB?
For technical support, including LM2901N/PB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2901N/PB requirements.
6.How does Aetrix verify that LM2901N/PB is sourced from the original manufacturer or authorized distributors?
All LM2901N/PB 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 LM2901N/PB meets industry standards.
7.What is the process for return or replacement of LM2901N/PB?
All LM2901N/PB units undergo pre-shipment inspection (PSI). If there is an issue with LM2901N/PB, 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 LM2901N/PB part is unused and in its original packaging.
Return procedure for LM2901N/PB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2901N/PB Tags
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LM2903DR
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LM339DR
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LM339PWR
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LM393DT
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LM2901PWR
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LM2903DT
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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