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Texas Instruments TL331KDBVR
- Part No.:
- TL331KDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL331KDBVR.pdf
- Description:
- IC COMPARATOR 1 DIFF SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,905
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Product details
Overview
TL331KDBVR from Texas Instruments is a single, open-collector output voltage comparator in SOT-23-5 package, designed for high-voltage industrial and power management applications. It operates from 2 V to 36 V supply, delivers ±4 mV max input offset voltage over temperature, 430 µA max quiescent current at 36 V, and 1 µs typical propagation delay. It is used in server PSUs and motor drives for precise overvoltage/undervoltage detection.
For engineers reviewing the TL331KDBVR datasheet, TL331KDBVR pinout, TL331KDBVR application, or TL331KDBVR equivalent, this page provides verified functional specifications, validated pin functions, confirmed operating conditions (–40°C to +105°C), and real-world implementation context for cost-sensitive, high-reliability analog signal conditioning.
Technical Context
The TL331KDBVR implements a PNP Darlington pair input stage enabling rail-to-rail common-mode operation down to ground and up to VCC – 1.5 V, with differential input range matching its absolute maximum rating of ±36 V. Its open-collector NPN output supports wired-AND logic and level-shifting across TTL, MOS, and CMOS interfaces.
It operates from single supplies (2–36 V) or dual supplies (ΔV = 2–36 V, VCC ≥ VCM + 1.5 V), with supply current independent of VCC. Input bias current is as low as 3.5 nA (typ), and ESD robustness is rated at ±1000 V HBM - consistent with TL331K specification per official TI documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports direct sensing in 24 V industrial rails and 36 V battery systems without external regulation. |
| Input Offset Voltage (max) | ±4 mV over –40°C to +105°C - ensures reliable threshold detection under thermal stress in motor control and PSU monitoring. |
| Quiescent Current (max) | 430 µA at 36 V and full temperature range - enables low-power always-on monitoring in energy-sensitive embedded systems. |
| Propagation Delay (typ) | 1.3 µs at 5 V, 100 mV overdrive - suitable for fast fault response in cordless tool battery protection and UPS transfer switching. |
| Input Bias Current (typ) | 3.5 nA at 25°C - minimizes error in high-impedance reference divider networks used in precision voltage supervision. |
| ESD Rating (HBM) | ±1000 V - meets standard handling requirements for manufacturing and field service in factory automation equipment. |
| Operating Temperature | –40°C to +105°C - qualified for under-hood automotive auxiliary modules and industrial motor drive control boards. |
Pinout & Package
SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Negative Input (IN–) | Inverting comparator input; referenced against IN+ to determine output state; accepts voltages from GND to VCC – 1.5 V. |
| 2 | Ground (GND) | Power return path and reference for input common-mode range; required for stable operation below 2 V supply. |
| 3 | Positive Input (IN+) | Non-inverting comparator input; determines threshold crossing direction; shares same voltage range as IN–. |
| 4 | Output (OUT) | Open-collector NPN output; sinks current when IN– > IN+ + VIO; requires external pull-up for logic-high level translation. |
| 5 | Supply (VCC) | Positive supply rail; powers internal bias circuitry and output transistor; supports up to 36 V DC with no derating. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 2 V to 36 V operation enables direct integration into 12 V, 24 V, and 36 V industrial power domains without LDO pre-regulation. |
| Ground-Sensing Input | Common-mode input range includes 0 V - allows accurate zero-crossing detection and battery cell monitoring down to ground potential. |
| Open-Collector Output | Supports wired-AND logic and flexible level-shifting to 1.8 V, 3.3 V, or 5 V MCU I/O - eliminates need for discrete logic buffers. |
| Low Input Bias Current | 3.5 nA typical - preserves accuracy in high-resistance voltage dividers used for high-voltage sensing (e.g., 30 V input → 2.5 V reference). |
| Fast Propagation Delay | 1.3 µs typical - meets timing requirements for overcurrent shutdown in motor drives and real-time fault response in server PSUs. |
Applications
| Server Power Supply Monitoring | Vacuum Robot Safety Interlock |
|---|---|
|
Use Scenario: Detecting overvoltage on +12 V and +5 V rails in redundant server PSUs to trigger immediate shutdown before downstream damage. IC Role / Device Role / Timing Role: Single comparator comparing sensed rail voltage against precision reference; open-collector output drives OR-ing logic to system fault bus. Use Value: ±4 mV offset ensures <10 mV total error margin at 12 V, enabling compliance with ATX12VO and Open Compute Project voltage tolerance specs. |
Use Scenario: Validating emergency stop signal integrity and verifying vacuum sensor feedback before actuator enable in cleanroom vacuum robots. IC Role / Device Role / Timing Role: Comparator validating analog vacuum pressure against safety threshold; output directly interfaces with FPGA safety monitor via 3.3 V pull-up. Use Value: 1.3 µs response time guarantees sub-2 µs fault detection latency, satisfying SIL-2 functional safety timing constraints for motion control. |
| Single-Phase UPS Transfer Control | Cordless Power Tool Battery Protection |
|
Use Scenario: Monitoring AC line presence and battery voltage to decide between utility and inverter power paths during grid failure or brownout. IC Role / Device Role / Timing Role: Dual-threshold detection using two TL331KDBVR units - one for line sense, one for battery undervoltage lockout. Use Value: 2–36 V supply range allows direct operation from 24 V backup battery, eliminating auxiliary supply and reducing BOM count by one regulator. |
Use Scenario: Cell-level overvoltage and overtemperature cutoff in 18 V/20 V MAX cordless drill packs with integrated fuel gauges. IC Role / Device Role / Timing Role: High-side voltage supervisor comparing cell stack voltage to 4.3 V reference; output disables charge FET via gate driver. Use Value: ±1000 V HBM ESD rating withstands repeated handling in manufacturing and field repair environments without added protection diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL331BDBVR | Improved specs: ±4 mV offset (same), 2 kV HBM ESD, –40°C to +125°C range, 430 µA IQ max - identical pinout and drop-in replacement for TL331KDBVR. | Extended temperature range supports under-hood automotive use; higher ESD rating improves robustness in high-noise factory automation. | Select TL331BDBVR when new designs require wider temp range or enhanced ESD immunity; legacy TL331KDBVR remains valid for existing +105°C designs. |
| LM393DR | Dual comparator in SOIC-8; 2 mV typical offset, 1 mA IQ, 1.3 µs delay, –40°C to +85°C - not pin-compatible; requires PCB redesign. | Lower cost per comparator in dual-channel applications; higher supply current limits battery-powered use. | Choose LM393DR only when dual functionality is needed and board space allows SOIC-8 footprint; not a direct substitute for single-channel TL331KDBVR. |
Compared with TL331BDBVR, TL331KDBVR offers proven qualification at +105°C with documented reliability in server PSU and power tool applications, while LM393DR provides dual-channel economy at the cost of higher power and reduced thermal margin - making TL331KDBVR optimal for space-constrained, single-threshold industrial monitoring.
Availability
TL331KDBVR is available at Aetrix Electronics and suitable for server PSU monitoring, cordless power tool battery protection, and vacuum robot safety interlocks requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for TL331KDBVR 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 and embedded processing solutions, with over 50 years of innovation in precision analog ICs and industrial-grade components.
The TL331 family was developed as a cost-optimized, high-voltage single comparator for industrial power management, battery protection, and safety-critical monitoring - emphasizing wide supply range, ground-sensing capability, and open-collector flexibility.
FAQ
What is the maximum supply voltage rating for TL331KDBVR?
The TL331KDBVR has an absolute maximum supply voltage of 36 V, with recommended operating range from 2 V to 36 V. This allows direct interface with 24 V industrial buses and 36 V battery systems without external regulation. Exceeding 36 V risks permanent damage per TI's Absolute Maximum Ratings table.
Does TL331KDBVR support input voltages down to ground?
Yes, TL331KDBVR supports common-mode input voltages from ground (0 V) up to VCC – 1.5 V, enabling true ground-referenced sensing. This is critical for applications like battery cell monitoring and zero-crossing detection where the negative input must operate at 0 V without error.
What is the guaranteed input offset voltage specification for TL331KDBVR over temperature?
TL331KDBVR guarantees ±4 mV maximum input offset voltage across its full operating temperature range of –40°C to +105°C. This value is specified in Section 5.10 of the TI datasheet and ensures reliable threshold accuracy in thermally demanding environments such as motor drive control boards.
Can TL331KDBVR replace TL331BDBVR in existing designs?
No - TL331KDBVR is not a drop-in replacement for TL331BDBVR. While both share the same SOT-23-5 pinout, TL331BDBVR features ±2 kV HBM ESD rating and –40°C to +125°C operation, whereas TL331KDBVR is rated for ±1 kV HBM and up to +105°C. Substitution requires validation of ESD robustness and thermal margin.
What output configuration does TL331KDBVR use, and how is it implemented?
TL331KDBVR uses an open-collector NPN output that sinks current when the negative input exceeds the positive input by more than the offset voltage. An external pull-up resistor is required to define the logic-high level - enabling level translation to 1.8 V, 3.3 V, or 5 V systems and wired-AND logic with other comparators.
TL331KDBVR 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 (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 5mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 700µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 105°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
TL331KDBVR FAQ
1.How can I place an order for TL331KDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL331KDBVR 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 TL331KDBVR reliable?
The price and inventory of TL331KDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL331KDBVR is usually 5 days.
3.What payment methods are accepted for TL331KDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL331KDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL331KDBVR?
TL331KDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL331KDBVR 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 TL331KDBVR?
For technical support, including TL331KDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL331KDBVR requirements.
6.How does Aetrix verify that TL331KDBVR is sourced from the original manufacturer or authorized distributors?
All TL331KDBVR 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 TL331KDBVR meets industry standards.
7.What is the process for return or replacement of TL331KDBVR?
All TL331KDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TL331KDBVR, 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 TL331KDBVR part is unused and in its original packaging.
Return procedure for TL331KDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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