My Inquiry
My Account
Texas Instruments LP2901D
- Part No.:
- LP2901D
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP2901D.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,867
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP2901D from Texas Instruments is a low-power quadruple voltage comparator IC designed for single-supply operation across 3 V to 30 V, featuring ±2 mV input offset voltage (typ), 60 µA supply current (typ), and −40°C to 85°C operating range - used in battery-powered limit detection and CMOS-level interface circuits.
For engineers reviewing the LP2901D datasheet, LP2901D pinout, LP2901D application, or LP2901D equivalent, this page delivers verified technical context, package mapping, real-world use cases, and validated alternative options for industrial sensor interfaces, analog-to-digital thresholding, and power-rail monitoring designs.
Technical Context
The LP2901D implements four independent open-collector comparators with p-n-p input stages enabling ground-sensing capability and common-mode input range extending to GND. Its bimodal output stage provides 30 mA sink current at VO = 2 V (Darlington mode) and ~700 µA at VO = 0.4 V (ground-emitter mode), supporting direct drive of LEDs, relays, and logic gates without external level-shifting.
Input bias current is −2.5 nA (typ) and input offset current is ±0.5 nA (typ), ensuring minimal loading on high-impedance sources. The device is reverse-voltage protected on VCC and supports unlimited output short-circuit duration to ground, making it robust in noisy or fault-prone environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V - enables direct operation from 5 V logic rails up to 24 V industrial supplies without regulation. |
| Supply Current | 60 µA typ - ultra-low quiescent draw suitable for always-on battery-powered systems. |
| Input Offset Voltage | ±2 mV typ - ensures accurate threshold detection in precision window or zero-crossing applications. |
| Input Bias Current | −2.5 nA typ - minimizes voltage error across high-value resistive dividers or sensor bridges. |
| Output Sink Current | 30 mA at VO = 2 V - drives standard LEDs, small relays, or TTL/CMOS inputs directly without buffer transistors. |
| Operating Temperature | −40°C to 85°C - qualified for extended industrial and automotive under-hood environments. |
| Common-Mode Input Range | 0 V to VCC − 2 V - includes ground reference, enabling direct sensing of signals referenced to system GND. |
Pinout & Package
LP2901D is housed in a 14-pin SOIC (D) package with 1.27 mm pitch, 8.75 mm × 3.91 mm body, and 1.75 mm max height - compatible with standard surface-mount assembly processes and IPC-7351 land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 5, 6 | Comparator Inputs (IN−/IN+) | Differential input pairs for each of four comparators; IN− and IN+ accept voltages from 0 V to VCC − 2 V. |
| 3, 7, 8, 11 | Comparator Outputs (OUT) | Open-collector outputs requiring external pull-up; support wired-AND logic and mixed-voltage interfacing. |
| 4 | GND | Ground reference for all comparators and internal bias network; must be connected to system return path. |
| 13 | VCC | Positive supply input; reverse-voltage protected; powers all four comparators and internal circuitry. |
| 12, 14 | Unused Comparator Inputs | Must be grounded per datasheet to prevent floating inputs and ensure stable bias current. |
Key Features
| Feature | Design Value |
|---|---|
| Single-Supply Operation | Operates from 3 V to 30 V with ground-referenced inputs - eliminates need for dual supplies in portable or industrial sensors. |
| Open-Collector Outputs | Enable flexible pull-up to any voltage ≤36 V - supports interfacing with 3.3 V, 5 V, or 12 V logic families without level shifters. |
| Bimodal Output Stage | Delivers 30 mA sink at VO ≥ 2 V and ~700 µA at VO ≤ 0.4 V - maintains drive capability across wide output voltage swing. |
| Ultra-Low Input Bias Current | −2.5 nA typ - preserves accuracy in high-impedance voltage divider networks and piezoelectric sensor conditioning. |
| Reverse-Voltage Protection | VCC pin withstands reverse polarity up to −0.3 V - improves reliability during board handling or power sequencing faults. |
Applications
| Industrial Threshold Detection | Battery Voltage Monitoring |
|---|---|
Use Scenario: Detecting overvoltage/undervoltage conditions on 12 V or 24 V DC power rails in PLC I/O modules. IC Role / Device Role / Timing Role: Quadruple comparator performing independent high/low threshold comparisons with hysteresis via external feedback. Use Value: Enables fail-safe shutdown or alarm signaling using only one LP2901D, reducing BOM count and PCB area versus discrete solutions. | Use Scenario: Monitoring remaining charge in lithium-ion or lead-acid battery packs for portable medical devices. IC Role / Device Role / Timing Role: Comparing scaled battery voltage against fixed reference thresholds to trigger low-battery warnings or cutoff logic. Use Value: 60 µA supply current extends system runtime; ground-sensing inputs allow direct connection to battery negative terminal. |
| CMOS Logic Interface | Simple Analog-to-Digital Conversion |
Use Scenario: Converting analog sensor outputs (e.g., temperature, pressure) into clean digital signals for microcontroller GPIO inputs. IC Role / Device Role / Timing Role: Voltage comparator acting as Schmitt-trigger front-end to reject noise and provide rail-to-rail logic-compatible output. Use Value: Open-collector outputs pull down to GND and interface directly with 3.3 V or 5 V CMOS inputs using appropriate pull-up resistors. | Use Scenario: Building a 2-bit flash ADC for panel meter displays or basic data acquisition in cost-sensitive instrumentation. IC Role / Device Role / Timing Role: Four parallel comparators comparing input voltage against three resistor-divider reference points. Use Value: Eliminates need for dedicated ADC IC; LP2901D's ±2 mV offset ensures <1% full-scale error in 0–5 V input range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quadruple comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2901DR | Same pinout, identical electrical specs, but rated for −40°C to 125°C; higher thermal rating than LP2901D's −40°C to 85°C. | Preferred for under-hood automotive or high-temperature industrial enclosures where ambient exceeds 85°C. | Select LM2901DR when extended temperature qualification is required; otherwise LP2901D offers identical performance at lower cost. |
| TLV331IDR | Single-channel, rail-to-rail input/output, 65 µA supply current, 1.8 V to 5.5 V supply - not pin-compatible; requires four units for quad function. | Suitable for ultra-low-voltage (1.8–3.3 V) battery systems where LP2901D's 3 V minimum cannot operate. | Choose TLV331IDR only for sub-3 V designs; LP2901D remains optimal for 5 V+ systems needing true quad integration and ground-sensing. |
Compared with LM2901DR, LP2901D trades extended temperature range for cost efficiency in standard industrial environments; compared with TLV331IDR, it delivers integrated quad functionality and ground-referenced inputs at higher supply voltages - simplifying layout and reducing component count in 5–24 V applications.
Availability
LP2901D is available at Aetrix Electronics and suitable for industrial sensor interfaces, battery management systems, and power-rail monitoring applications requiring stable component supply and long-term design continuity.
Supply support for LP2901D 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, embedded processing, and connectivity technologies with over 90 years of innovation in industrial, automotive, and consumer electronics.
The LP2901D belongs to TI's legacy low-power comparator family, engineered for reliable single-supply operation in cost-sensitive, battery-constrained, and industrial control applications where ground-sensing and CMOS compatibility are essential.
FAQ
What is the maximum supply voltage rating for LP2901D?
The LP2901D has an absolute maximum supply voltage (VCC) rating of 36 V. However, its recommended operating range is 3 V to 30 V per the datasheet. Operating above 30 V may degrade long-term reliability or cause parametric drift, even if within absolute limits. Always observe the 30 V upper bound for sustained operation in designs using LP2901D.
Does LP2901D support rail-to-rail input operation?
No, LP2901D does not support rail-to-rail input. Its common-mode input voltage range is specified as 0 V to VCC − 2 V at full temperature range. While it includes ground (0 V), the upper limit stops 2 V below VCC - unlike modern rail-to-rail comparators. This limitation must be accounted for when designing input dividers or referencing LP2901D in high-side sensing applications.
Can unused comparators in LP2901D be left unconnected?
No, unused comparators in LP2901D must have both inputs grounded per the datasheet. Leaving inputs floating causes unpredictable bias current paths and may increase total supply current or induce oscillation. Grounding IN+ and IN− pins of idle sections ensures stable 60 µA typical ICC and prevents interference with active comparators - a mandatory practice for reliable LP2901D implementation.
Is LP2901D pin-compatible with LM339?
Yes, LP2901D is pin-for-pin compatible with LM339, LM239, and LM2901 in the same SOIC-14 (D) package. All share identical pin assignments, electrical behavior, and functional architecture. This allows drop-in replacement in existing LM339-based designs - provided the −40°C to 85°C temperature range of LP2901D meets system requirements.
What is the output configuration of LP2901D and how should it be used?
LP2901D features open-collector outputs requiring external pull-up resistors. Each output (pins 3, 7, 8, 11) sinks current to GND when active and floats when inactive. Pull-up voltage can be any value ≤36 V and need not match VCC - enabling mixed-voltage interfacing. For example, LP2901D powered by 5 V can drive 3.3 V logic using a 3.3 V pull-up, preserving signal integrity without level translators.
LP2901D 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:
- CMOS, MOS, Open-Collector
- Voltage - Supply, Single/Dual (±):
- 3V ~ 30V
- :
- 5mV @ 30V
- Voltage - Input Offset (Max):
- 0.025µA @ 5V
- Current - Input Bias (Max):
- 30mA @ 5V
- Current - Output (Typ):
- 100µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
LP2901D FAQ
1.How can I place an order for LP2901D through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2901D 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 LP2901D reliable?
The price and inventory of LP2901D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2901D is usually 5 days.
3.What payment methods are accepted for LP2901D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2901D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2901D?
LP2901D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2901D 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 LP2901D?
For technical support, including LP2901D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2901D requirements.
6.How does Aetrix verify that LP2901D is sourced from the original manufacturer or authorized distributors?
All LP2901D 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 LP2901D meets industry standards.
7.What is the process for return or replacement of LP2901D?
All LP2901D units undergo pre-shipment inspection (PSI). If there is an issue with LP2901D, 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 LP2901D part is unused and in its original packaging.
Return procedure for LP2901D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP2901D 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…
