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Texas Instruments TL331KDBVRG4
- Part No.:
- TL331KDBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL331KDBVRG4.pdf
- Description:
- IC COMPARATOR 1 DIFF SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,659
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Product details
Overview
TL331KDBVRG4 from Texas Instruments is a single-voltage comparator in SOT-23-5 package, featuring 2–36 V supply range, ±4 mV max input offset voltage over temperature, 430 µA max quiescent current at 36 V, and 1 µs typical propagation delay. It serves as a precision level-shifting and threshold-detection element in high-voltage industrial power supplies and motor control feedback loops.
For engineers reviewing the TL331KDBVRG4 datasheet, TL331KDBVRG4 pinout, TL331KDBVRG4 application, or TL331KDBVRG4 equivalent, this page delivers verified electrical specs, validated SOT-23 pin functions, real-world use cases in server PSUs and cordless tools, and two confirmed alternative comparators with documented functional and thermal differences.
Technical Context
The TL331KDBVRG4 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 voltage tolerance of ±36 V. Its open-collector NPN output supports wired-AND logic and flexible pull-up voltage selection independent of VCC.
It operates across −40°C to +105°C (K-suffix), draws supply current independent of VCC, and maintains stable propagation delay under varying overdrive (5–100 mV) and supply conditions (5–36 V). ESD rating is ±1000 V HBM per JEDEC JS-001.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2 V to 36 V - supports direct interface with 24 V industrial rails and 3.3/5 V logic without level shifters. |
| Input Offset Voltage (max) | ±4 mV over −40°C to +105°C - ensures reliable threshold detection in temperature-variable environments like motor drives. |
| Quiescent Current (max) | 430 µA at 36 V and full temp range - enables low-power always-on monitoring in battery-backed systems. |
| Propagation Delay (typ) | 1 µs at 5 V, 100 mV overdrive - provides fast response for overvoltage/undervoltage protection in UPS and server PSUs. |
| Input Bias Current (typ) | 3.5 nA at 25°C - minimizes loading on high-impedance reference dividers and sensor outputs. |
| Output Type | Open-collector NPN - allows pull-up to any voltage ≤36 V and enables wired-AND bus configurations. |
| ESD Rating (HBM) | ±1000 V - meets standard handling requirements for automated assembly in industrial manufacturing. |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm max height, gull-wing leads, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Negative Input (IN−) | Inverting input node; comparison reference point - voltage here > IN+ triggers output sink. |
| 2 | Ground (GND) | Signal and power return reference - must be low-impedance path to avoid common-mode error. |
| 3 | Positive Input (IN+) | Non-inverting input node - monitored signal connects here for active-high trip behavior. |
| 4 | Output (OUT) | Open-collector NPN collector - requires external pull-up; sinks up to 20 mA when active. |
| 5 | Power Supply (VCC) | Positive supply rail - accepts 2–36 V; current draw independent of voltage level. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground and extends to VCC − 1.5 V - enables direct sensing of 0 V–30 V signals without attenuators. |
| Differential input voltage tolerance | ±36 V - protects against transient overvoltage during load dump or inductive kickback. |
| Low input bias current | 3.5 nA typical - preserves accuracy in high-Z resistor-divider references and thermistor networks. |
| Fast propagation delay | 1 µs typical at 100 mV overdrive - meets <2 µs response requirement for Class II overvoltage protection. |
| Wide operating temperature | −40°C to +105°C - qualified for under-hood automotive auxiliary modules and factory automation enclosures. |
Applications
| Server PSU Monitoring | Vacuum Robot Safety Interlock |
|---|---|
|
Use Scenario: Detecting 12 V rail undervoltage in redundant server power supplies before system shutdown. IC Role / Device Role / Timing Role: Threshold comparator comparing scaled rail voltage against 1.25 V reference; triggers latchable fault signal. Use Value: 1 µs response ensures fault capture within 5 µs window required by Intel VR14 spec; ±4 mV offset prevents false trips during 50 mV ripple. |
Use Scenario: Validating emergency stop circuit continuity in vacuum-handling robotic arms. IC Role / Device Role / Timing Role: Open-collector comparator verifying loop resistance <10 Ω via voltage drop across series resistor. Use Value: 2–36 V supply range allows direct 24 V loop powering; 3.5 nA bias current avoids measurement error in high-resistance safety wiring. |
| Cordless Power Tool Battery Protection | Single-Phase UPS Transfer Control |
|
Use Scenario: Cell-level overvoltage detection in 10S Li-ion battery packs during charging. IC Role / Device Role / Timing Role: Precision comparator monitoring individual cell voltage via resistive divider; output drives MOSFET gate driver enable. Use Value: ±4 mV offset ensures ±10 mV total error budget at 4.2 V - meets UL 2271 cell-balancing tolerance; SOT-23 footprint saves space in compact BMS modules. |
Use Scenario: Sensing grid failure and initiating transfer to battery backup in line-interactive UPS units. IC Role / Device Role / Timing Role: Zero-crossing detector and AC loss monitor using rectified and filtered mains voltage vs. stable reference. Use Value: 36 V absolute max rating withstands 30 V peak rectified input; 430 µA IQ minimizes standby drain on backup battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL331BDBVR | Improved specs: ±2.5 mV offset (typ), 2 kV HBM ESD, −40°C to +125°C range, 1 µs tPHL at 5 mV overdrive. | Supports extended temperature industrial control and automotive under-hood use where TL331KDBVRG4's +105°C limit is insufficient. | Select TL331BDBVR when higher accuracy, wider temp range, or enhanced ESD robustness is required - not pin-compatible due to different suffix-driven qualification. |
| LM393DR | Dual comparator, 2–36 V supply, ±7 mV offset (max), 1.3 µs response, 0.7 mA IQ, SOIC-8 package. | Offers dual-channel integration for cost-sensitive designs needing two independent thresholds; larger footprint and higher current. | Choose LM393DR only if dual functionality justifies SOIC-8 layout and 60% higher supply current - no pin compatibility with TL331KDBVRG4's SOT-23-5. |
Compared with TL331KDBVRG4, TL331BDBVR delivers tighter offset and broader temperature capability but requires requalification; LM393DR adds channel count and SOIC-8 compatibility at the cost of power and size - neither is a drop-in replacement, and both demand PCB and firmware validation for timing-critical protection functions.
Availability
TL331KDBVRG4 is available at Aetrix Electronics and suitable for server PSU monitoring, cordless power tool battery protection, and single-phase UPS transfer control requiring stable component supply across industrial temperature grades and long-lifecycle programs.
Supply support for TL331KDBVRG4 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 leadership in precision comparators and power management ICs.
The TL331 family was designed for cost-sensitive, high-voltage industrial and consumer applications demanding reliability, wide supply range, and open-collector flexibility - TL331KDBVRG4 specifically targets K-grade temperature operation in power conversion and safety-critical monitoring.
FAQ
What is the maximum supply voltage rating for TL331KDBVRG4?
The TL331KDBVRG4 has an absolute maximum supply voltage of 36 V, with recommended operating range of 2 V to 36 V. This allows direct interfacing with 24 V industrial rails and 36 V battery systems without external regulation. Exceeding 36 V risks permanent damage per Absolute Maximum Ratings section 5.1 of the datasheet.
Does TL331KDBVRG4 support operation down to ground on its inputs?
Yes, TL331KDBVRG4 supports common-mode input voltage down to ground (0 V), as confirmed in Section 5.6 Recommended Operating Conditions and Section 6.1 Overview. Its PNP Darlington input stage enables rail-to-rail input operation from GND to VCC − 1.5 V, making it suitable for detecting zero-crossing or low-side current sense signals.
What is the guaranteed input offset voltage specification for TL331KDBVRG4 over temperature?
The TL331KDBVRG4 guarantees ±4 mV maximum input offset voltage across its full operating temperature range of −40°C to +105°C, per Electrical Characteristics table 5.8. This is tighter than legacy TL331I (±9 mV) and reflects the K-suffix qualification for extended industrial temperature performance.
Can TL331KDBVRG4 drive a 5 V logic input directly?
No - TL331KDBVRG4 has an open-collector output and cannot source current. To drive a 5 V logic input, an external pull-up resistor to 5 V must be connected to the OUT pin (Pin 4). The output will sink current when active, pulling the node to <400 mV (typical) at 4 mA load, satisfying TTL/CMOS low-level thresholds.
Is TL331KDBVRG4 pin-compatible with TL331BDBVR?
No - while both use SOT-23-5 (DBV) packaging and share identical pin numbering (IN−, GND, IN+, OUT, VCC), TL331KDBVRG4 and TL331BDBVR are not functionally interchangeable without design review. TL331BDBVR specifies ±2.5 mV offset (typ), 2 kV HBM ESD, and −40°C to +125°C operation - differences that impact system-level qualification and thermal margin.
TL331KDBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
TL331KDBVRG4 FAQ
1.How can I place an order for TL331KDBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL331KDBVRG4 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 TL331KDBVRG4 reliable?
The price and inventory of TL331KDBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL331KDBVRG4 is usually 5 days.
3.What payment methods are accepted for TL331KDBVRG4?
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4.How is shipping managed for TL331KDBVRG4?
TL331KDBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL331KDBVRG4 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 TL331KDBVRG4?
For technical support, including TL331KDBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL331KDBVRG4 requirements.
6.How does Aetrix verify that TL331KDBVRG4 is sourced from the original manufacturer or authorized distributors?
All TL331KDBVRG4 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 TL331KDBVRG4 meets industry standards.
7.What is the process for return or replacement of TL331KDBVRG4?
All TL331KDBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL331KDBVRG4, 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 TL331KDBVRG4 part is unused and in its original packaging.
Return procedure for TL331KDBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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