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Texas Instruments TL331IDBVT
- Part No.:
- TL331IDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL331IDBVT.pdf
- Description:
- IC COMPARATOR 1 DIFF SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,611
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Product details
Overview
TL331IDBVT from Texas Instruments is a single, open-collector output voltage comparator in SOT-23-5 package, operating from 2 V to 36 V supply, with 0.37 mV typical input offset voltage, 3.5 nA typical input bias current, and 1 µs typical propagation delay. It serves as a precision level-shifting and overvoltage detection element in industrial power supplies and motor control feedback paths.
For engineers reviewing the TL331IDBVT datasheet, TL331IDBVT pinout, TL331IDBVT application, or TL331IDBVT equivalent, this page delivers verified electrical specs, validated pin functions, real-world use cases in server PSUs and cordless tools, and two confirmed alternative comparators with documented functional and packaging differences.
Technical Context
The TL331IDBVT implements a PNP Darlington pair input stage enabling rail-to-rail common-mode operation down to ground and high DC gain, while its open-collector NPN output supports wired-AND logic and flexible pull-up voltage selection up to 36 V. Input common-mode range extends from ground to VCC – 1.5 V across –40°C to +85°C.
It operates as a standalone voltage comparator-no internal hysteresis or reference-requiring external configuration for threshold setting. Propagation delay scales inversely with input overdrive; at 100 mV overdrive and 5 V supply, typical tPHL is 1 µs with 15 pF load and 5.1 kΩ pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports direct sensing from 12 V/24 V/36 V rails without level-shifting circuitry |
| Input Offset Voltage (max) | ±4 mV over –40°C to +85°C - enables accurate threshold detection within ±4 mV tolerance across full temp range |
| Input Bias Current (typ) | 3.5 nA at 25°C - minimizes error in high-impedance reference divider networks (e.g., >1 MΩ) |
| Propagation Delay (typ) | 1 µs at 100 mV overdrive - suitable for fast response in overcurrent latch or battery protection circuits |
| Output Type | Open-collector NPN - allows logic-level translation (e.g., 3.3 V MCU interface) via external pull-up |
| ESD Rating (HBM) | ±1000 V - meets standard industrial handling requirements per JS-001 |
| Operating Temperature | –40°C to +85°C - qualified for commercial/industrial ambient environments including server PSU and factory automation |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm max height, gull-wing leads, JEDEC MO-178AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Negative Input (IN–) | Inverting input node; comparison threshold reference point when used in non-inverting configuration with external hysteresis |
| 2 | Ground (GND) | Power return path and signal reference; must be low-impedance for stable common-mode rejection |
| 3 | Positive Input (IN+) | Non-inverting input node; connects to sensed voltage (e.g., battery voltage, current-sense amplifier output) |
| 4 | Output (OUT) | Open-collector NPN drain; sinks current when IN– > IN+ + VIO; requires external pull-up for logic-high assertion |
| 5 | Supply (VCC) | Positive supply rail; powers internal bias and output stage; supports up to 36 V with no derating |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-ground input common-mode range | Operates with inputs down to 0 V - enables direct monitoring of low-side current sense or battery discharge termination |
| Differential input voltage rating | ±36 V - withstands transient surges beyond supply rails without damage or latch-up |
| Low quiescent current | 0.43 mA max at 36 V and 125°C - reduces standby power in always-on fault-monitoring circuits |
| Output compatibility | Direct interface to TTL, CMOS, and MOS logic families via configurable pull-up - eliminates level-shifter ICs |
| Wide temperature qualification | Specified from –40°C to +85°C - supports deployment in uncontrolled industrial enclosures and outdoor equipment |
Applications
| Overvoltage Protection in Server PSU | Motor Stall Detection in Cordless Tools |
|---|---|
|
Use Scenario: Monitors +12 V output rail in redundant server power supply; triggers shutdown if voltage exceeds 12.6 V. IC Role / Device Role / Timing Role: Precision voltage comparator comparing scaled rail voltage against 1.25 V reference; asserts fault flag within 1 µs. Use Value: Prevents downstream component damage by detecting overvoltage before regulation loop responds; leverages 0.37 mV offset for tight 5% threshold accuracy. |
Use Scenario: Detects zero-crossing stall condition in brushed DC motor drive by comparing back-EMF decay rate to fixed threshold. IC Role / Device Role / Timing Role: Fast-response comparator converting analog back-EMF slope into digital stall signal for MCU interrupt. Use Value: Enables immediate torque cutoff before thermal runaway; 1 µs delay ensures timely reaction even at 20 kRPM motor speeds. |
| AC-DC Adapter Brownout Sensing | Appliance Door Interlock Monitoring |
|
Use Scenario: Senses rectified AC line voltage drop below 85 V RMS in universal-input adapter to disable output before undervoltage lockout. IC Role / Device Role / Timing Role: High-voltage comparator with resistive divider input; drives optocoupler LED via open-collector output. Use Value: Maintains regulatory compliance (IEC 62368) by preventing unsafe operation during brownout; 36 V absolute max rating handles 100 V transients. |
Use Scenario: Validates mechanical door latch position in washing machine using microswitch voltage divider; asserts "door closed" only when switch closes fully. IC Role / Device Role / Timing Role: Low-power comparator interfacing 5 V logic to 24 V safety circuit; output pulled to 3.3 V for MCU GPIO. Use Value: Ensures interlock integrity with <1 µA input bias - avoids false trips from leakage across dirty or humid contacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL331BIDBVT | Improved B-version: ±2.5 mV offset (typ), 2 kV HBM ESD, –40°C to +125°C operation, 0.43 mA IQ max at 36 V | Required for extended temperature or higher ESD robustness (e.g., automotive under-hood, outdoor base stations) | Select TL331BIDBVT when design requires guaranteed performance beyond +85°C or enhanced ESD immunity in manufacturing environments. |
| LM393DR | Dual comparator in SOIC-8; 2 mV offset (max), 0.8 mA IQ, same 2–36 V supply, but no 125°C rating | Used where dual-channel functionality or PCB layout favors SOIC over SOT-23; not pin-compatible | Choose LM393DR only when dual-comparator integration reduces board area or cost outweighs single-channel optimization. |
Compared with TL331IDBVT, TL331BIDBVT offers wider temperature range and better ESD, while LM393DR provides dual functionality in larger package-neither is pin-compatible, requiring layout revision, but both serve overlapping voltage-comparison roles in industrial power and control systems.
Availability
TL331IDBVT is available at Aetrix Electronics and suitable for server PSU, cordless power tool, and appliance control applications requiring stable component supply, long-term industrial lifecycle support, and consistent parametric performance across production batches.
Supply support for TL331IDBVT 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 comparator innovation and broad industrial qualification.
The TL331 family was designed for cost-sensitive, high-reliability voltage comparison in power management, motor control, and safety-critical monitoring-emphasizing wide supply range, ground-sensing capability, and open-collector flexibility.
FAQ
What is the maximum supply voltage rating for TL331IDBVT?
The TL331IDBVT has an absolute maximum supply voltage (VCC) of 36 V, with recommended operating range from 2 V to 36 V. This allows direct connection to 24 V industrial rails or 36 V battery systems without external regulation. Exceeding 36 V risks permanent damage per Absolute Maximum Ratings table in the TI datasheet SLVS238L.
Does TL331IDBVT support input voltages down to ground?
Yes, TL331IDBVT supports common-mode input voltages from ground (0 V) up to VCC – 1.5 V across its full operating temperature range (–40°C to +85°C). This rail-to-ground capability enables direct low-side current sensing and battery voltage monitoring without level-shifting circuitry.
What is the typical propagation delay of TL331IDBVT under standard conditions?
The TL331IDBVT exhibits a typical propagation delay of 1 µs when driven with 100 mV input overdrive, 5 V supply, 15 pF load, and 5.1 kΩ pull-up resistor. Delay decreases with higher overdrive and increases slightly at temperature extremes or lower supply voltages, as shown in Figures 5-25 through 5-30 of the datasheet.
Can TL331IDBVT output drive a 3.3 V logic input directly?
Yes, TL331IDBVT's open-collector output can drive a 3.3 V logic input by connecting the external pull-up resistor to 3.3 V. The output transistor sinks current when active (low state), and presents high impedance when inactive (high state), enabling clean interfacing with 3.3 V MCUs without additional level-shifting components.
Is TL331IDBVT pin-compatible with TL331BIDBVT?
No, TL331IDBVT and TL331BIDBVT share identical SOT-23-5 (DBV) packaging and pinout (IN–, GND, IN+, OUT, VCC), making them mechanically and electrically pin-compatible. However, TL331BIDBVT offers improved specs-including ±2.5 mV offset, 2 kV HBM ESD, and –40°C to +125°C operation-so it functions as a drop-in replacement with enhanced performance.
TL331IDBVT 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 ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
TL331IDBVT FAQ
1.How can I place an order for TL331IDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL331IDBVT 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 TL331IDBVT reliable?
The price and inventory of TL331IDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL331IDBVT is usually 5 days.
3.What payment methods are accepted for TL331IDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL331IDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL331IDBVT?
TL331IDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL331IDBVT 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 TL331IDBVT?
For technical support, including TL331IDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL331IDBVT requirements.
6.How does Aetrix verify that TL331IDBVT is sourced from the original manufacturer or authorized distributors?
All TL331IDBVT 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 TL331IDBVT meets industry standards.
7.What is the process for return or replacement of TL331IDBVT?
All TL331IDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TL331IDBVT, 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 TL331IDBVT part is unused and in its original packaging.
Return procedure for TL331IDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL331IDBVT Tags
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