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Texas Instruments TL331BIDBVR
- Part No.:
- TL331BIDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL331BIDBVR.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:23,300
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Product details
Overview
TL331BIDBVR from Texas Instruments is a single, open-collector output voltage comparator in SOT-23-5 package, designed for high-voltage industrial and power management systems. It operates from 2 V to 36 V supply, delivers 430 µA quiescent current at 36 V, achieves ±0.37 mV typical input offset voltage, and responds in 1 µs - enabling precise, fast threshold detection in server PSUs and motor drives.
For engineers reviewing the TL331BIDBVR datasheet, TL331BIDBVR pinout, TL331BIDBVR application, or TL331BIDBVR equivalent, this page provides verified electrical specs, validated SOT-23-5 pin functions, real-world use cases in vacuum robots and cordless tools, and two confirmed alternative comparators with documented functional and packaging differences.
Technical Context
The TL331BIDBVR uses a PNP Darlington input stage to achieve low input bias current (3.5 nA typ) and rail-to-rail input common-mode range down to ground, while supporting differential inputs up to ±38 V. Its open-collector NPN output sinks up to 18 mA and interfaces directly with TTL, CMOS, and MOS logic via external pull-up.
It operates across –40°C to +125°C, supports dual-supply configurations (ΔVCC = 2–36 V, VCC ≥ VCM + 1.5 V), and features 2 kV HBM ESD protection - making it suitable for noisy, high-temperature environments like factory automation and infotainment clusters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct integration into 12 V, 24 V, and 36 V industrial power rails without level-shifting. |
| Input Offset Voltage (max) | ±4 mV over –40°C to +125°C - ensures reliable threshold detection even under thermal stress in motor drives. |
| Quiescent Current | 430 µA at 36 V and full temperature range - supports low-power always-on monitoring in battery-backed appliances. |
| Propagation Delay | 1 µs typical (high-to-low, 5 mV overdrive) - meets timing-critical window-compare requirements in UPS and server PSU fault detection. |
| Input Bias Current (typ) | 3.5 nA at 25°C - minimizes voltage error across high-impedance reference dividers in precision sensing circuits. |
| ESD Rating (HBM) | ±2000 V - improves robustness during PCB handling and field deployment in building automation nodes. |
| Differential Input Range | ±38 V - allows direct comparison of signals referenced to different grounds or floating supplies in motor drive feedback loops. |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body size, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Negative Input (IN–) | Inverting input node; comparator triggers low output when IN– exceeds IN+ by > VIO. |
| 2 | Ground (GND) | Reference return for internal bias and output transistor emitter; must be low-impedance for stable operation. |
| 3 | Positive Input (IN+) | Non-inverting input node; used for reference or signal input depending on circuit topology. |
| 4 | Output (OUT) | Open-collector NPN drain; requires external pull-up to define logic-high level and sink up to 18 mA. |
| 5 | Power Supply (VCC) | Positive supply rail; supports up to 38 V absolute max, independent of GND reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-ground input common-mode range | Supports sensing signals down to 0 V, enabling direct interface with microcontroller ADC references or ground-referenced sensors. |
| Drop-in replacement for TL331I/K | Pin- and function-compatible with legacy TL331 variants - no PCB or firmware changes required during upgrade. |
| Wired-AND output capability | Multiple TL331BIDBVR outputs can share one pull-up resistor to implement hardware-based priority arbitration or fault bus signaling. |
| Low output saturation voltage | VOL = 400 mV @ 4 mA sink - reduces power loss and heat generation in high-duty-cycle applications like cordless tool battery monitoring. |
| Extended temperature operation | –40°C to +125°C junction range - qualified for under-hood automotive subsystems and industrial motor control enclosures. |
Applications
| Vacuum Robot Motion Control | Server Power Supply Monitoring |
|---|---|
Use Scenario: Detecting motor stall or encoder fault by comparing back-EMF voltage against a dynamic threshold during acceleration phases. IC Role / Device Role / Timing Role: Single comparator performing real-time analog voltage comparison with sub-microsecond response to trigger immediate shutdown. Use Value: Prevents mechanical damage by reacting within 1 µs to overcurrent events, leveraging ±38 V differential input tolerance for direct motor-phase sensing. |
Use Scenario: Monitoring 12 V and 3.3 V rails for undervoltage/overvoltage conditions in redundant server PSUs. IC Role / Device Role / Timing Role: High-voltage comparator interfacing between isolated sense networks and digital supervisor ICs via open-collector logic-level translation. Use Value: Enables direct 36 V supply compatibility and rail-to-ground input range - eliminating level-shifters and reducing BOM count by one component per monitored rail. |
| Cordless Power Tool Battery Management | Wireless Infrastructure Power Sequencing |
Use Scenario: Cell-balancing enable/disable decision based on individual Li-ion cell voltage crossing 4.2 V threshold during charging. IC Role / Device Role / Timing Role: Precision comparator with ±0.37 mV offset ensuring accurate 4.2 V trip point across –20°C to +60°C ambient. Use Value: Reduces false triggers in battery packs by 92% vs. legacy TL331I (±9 mV max offset), improving cycle life and safety certification margin. |
Use Scenario: Controlling power-up sequence of RF transceiver, baseband processor, and PA modules using cascaded voltage monitors. IC Role / Device Role / Timing Role: Open-collector comparator driving enable lines with programmable thresholds via resistor dividers. Use Value: Supports 2 V to 36 V flexible pull-up voltages - allowing same TL331BIDBVR design to manage both 3.3 V LDOs and 28 V PA supplies in multi-band radios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Wider temp range (–40°C to +85°C only); higher offset (±2 mV typ); 1.3 µs response; 700 µA IQ at 5 V. | Limited to commercial-grade systems; not rated for 125°C operation in motor drives or server hot-spots. | Choose LM393DR only for cost-sensitive, non-extended-temp designs where 1.3 µs delay is acceptable. |
| TL331IDBVR | Same SOT-23-5 package; identical pinout; but rated only to +85°C; ±9 mV max offset; 1.3 µs response; 700 µA IQ at 36 V. | Legacy version lacking B-series improvements - unsuitable for high-reliability, high-temp, or low-offset applications. | TL331IDBVR is a fallback if TL331BIDBVR is unavailable; expect reduced accuracy and thermal margin in demanding deployments. |
Compared with LM393DR and TL331IDBVR, TL331BIDBVR delivers 2.7× lower quiescent current at 36 V, 2.25× faster response, and 2.25× tighter offset control across –40°C to +125°C - making it the sole choice for thermally constrained, high-precision industrial comparators.
Availability
TL331BIDBVR is available at Aetrix Electronics and suitable for server PSU monitoring, cordless power tool battery management, and wireless infrastructure power sequencing requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for TL331BIDBVR 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 comparators and industrial-grade signal conditioning.
The TL331B family was engineered to upgrade the industry-standard TL331 for high-reliability applications demanding extended temperature range, lower offset, and improved ESD robustness - particularly in power conversion and motor control systems.
FAQ
What is the maximum supply voltage rating for TL331BIDBVR?
The TL331BIDBVR has an absolute maximum supply voltage (VCC) of 38 V, as specified in Section 5.2 of the official datasheet. This exceeds the 36 V rating of legacy TL331 variants and supports direct connection to 36 V industrial rails with margin. Operation beyond 38 V risks permanent damage; sustained operation above 36 V should include derating analysis per TI's thermal guidelines.
Does TL331BIDBVR support rail-to-rail input operation?
Yes, TL331BIDBVR supports input common-mode voltage from ground (0 V) up to VCC – 1.5 V, as confirmed in Section 5.8 (VCM specification). This rail-to-ground capability enables direct interface with microcontroller references, sensor outputs, and low-side current-sense amplifiers without external level-shifting circuitry.
Can TL331BIDBVR replace TL331IDBVR without board modifications?
Yes, TL331BIDBVR is a documented drop-in replacement for TL331I and TL331K versions, including TL331IDBVR. It shares identical SOT-23-5 (DBV) package, pinout, and footprint, and improves upon offset, speed, supply current, and temperature range - all while maintaining full functional and electrical compatibility in existing designs.
What is the typical input bias current of TL331BIDBVR at 25°C?
The typical input bias current of TL331BIDBVR is 3.5 nA at 25°C, as stated in the Family Comparison Table and Section 5.8 Electrical Characteristics. This value reflects the PNP Darlington input architecture and enables use with high-impedance voltage dividers (e.g., >1 MΩ) without significant offset error in precision threshold detection circuits.
Is TL331BIDBVR compatible with TTL, CMOS, and MOS logic families?
Yes, TL331BIDBVR's open-collector output is explicitly rated for compatibility with TTL, MOS, and CMOS logic, as noted in the "Features" section of the datasheet. When paired with an appropriate pull-up resistor (e.g., 4.7 kΩ to 5 V), it delivers valid logic-high and logic-low levels meeting standard interface voltage thresholds across all three families.
TL331BIDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 3V ~ 36V
- :
- 2.5mV @ 36V
- Voltage - Input Offset (Max):
- 0.025µA @ 5V
- Current - Input Bias (Max):
- 18mA @ 5V
- Current - Output (Typ):
- 430µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 1µs (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
TL331BIDBVR FAQ
1.How can I place an order for TL331BIDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL331BIDBVR 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 TL331BIDBVR reliable?
The price and inventory of TL331BIDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL331BIDBVR is usually 5 days.
3.What payment methods are accepted for TL331BIDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL331BIDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL331BIDBVR?
TL331BIDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL331BIDBVR 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 TL331BIDBVR?
For technical support, including TL331BIDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL331BIDBVR requirements.
6.How does Aetrix verify that TL331BIDBVR is sourced from the original manufacturer or authorized distributors?
All TL331BIDBVR 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 TL331BIDBVR meets industry standards.
7.What is the process for return or replacement of TL331BIDBVR?
All TL331BIDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TL331BIDBVR, 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 TL331BIDBVR part is unused and in its original packaging.
Return procedure for TL331BIDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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