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Texas Instruments TLV1391IDBVT
- Part No.:
- TLV1391IDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV1391IDBVT.pdf
- Description:
- IC COMPARATOR 1 DIFF SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:730
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Product details
Overview
TLV1391IDBVT from Texas Instruments is a single high-speed differential comparator optimized for low-voltage, single-supply operation (2 V to 7 V), featuring 0.7 µs typical response time at 3 V, 80 µA typical supply current, and rail-to-rail input common-mode range including ground - used in precision voltage monitoring and overvoltage protection circuits.
For engineers reviewing the TLV1391IDBVT datasheet, TLV1391IDBVT pinout, TLV1391IDBVT application, or TLV1391IDBVT equivalent, key selection criteria include its −40°C to 85°C industrial temperature grade, SOT-23-5 package, open-collector output with 20 mA sink capability, input offset voltage ≤9 mV over full temperature range, and compatibility with 3-V/5-V logic interfaces.
Technical Context
The TLV1391IDBVT implements a bipolar comparator core with 26 transistors, 1 resistor, 4 diodes, and 1 Epi-FET, enabling fast propagation delay and stable operation across low supply voltages. Its input stage supports common-mode voltages down to ground and up to VCC−2 V, while the open-collector output allows flexible pull-up configuration and wired-OR logic interfacing.
Designed as a direct upgrade to LM393 in modern 3-V/5-V systems, it delivers improved speed and lower quiescent current without requiring external biasing or level-shifting circuitry - making it suitable for battery-powered sensing and real-time threshold detection where power and response time are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 7 V - enables operation from single-cell Li-ion (3.0–3.7 V) or dual-AA (3.0 V) supplies without regulation. |
| Response Time | 0.7 µs typ at 3 V - supports detection of fast transients in power supply sequencing or fault monitoring. |
| Supply Current | 80 µA typ, 150 µA max - reduces standby power in always-on sensor nodes and portable equipment. |
| Input Offset Voltage | ≤9 mV over −40°C to 85°C - ensures consistent trip-point accuracy across industrial temperature range. |
| Common-Mode Input Range | 0 V to VCC−2 V - accepts ground-referenced inputs and supports high-side sensing with appropriate resistive dividers. |
| Output Sink Current | 20 mA max - drives LEDs, MOSFET gates, or logic inputs directly without external buffer stages. |
| Input Bias Current | −400 nA max - minimizes loading error in high-impedance voltage divider networks. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.45 mm body, gull-wing leads, moisture sensitivity level 1, lead finish NiPdAu/Sn.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting Input | Differential input node; referenced against IN+ to determine output state. |
| 2 (GND) | Ground Reference | Power return path and common-mode reference for inputs and output stage. |
| 3 (IN+) | Noninverting Input | Differential input node; higher potential than IN− forces output high (open-collector pulled up). |
| 4 (VCC) | Positive Supply | Single supply rail (2–7 V); powers internal bias and output transistor. |
| 5 (OUT) | Open-Collector Output | Active-low output; requires external pull-up resistor to define logic-high level and drive strength. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 2 V supply - eliminates need for LDO pre-regulation in energy-constrained systems. |
| Rail-to-Rail Input Range | Includes ground and extends to VCC−2 V - simplifies interface with sensors, DACs, and ADC references without level shifters. |
| Fast Propagation Delay | 0.65 µs typ at 5 V - enables sub-microsecond threshold detection for motor control commutation or overcurrent shutdown. |
| Low Quiescent Current | 80 µA typ - extends battery life in IoT endpoint devices operating on coin cells or small LiPo packs. |
| Industrial Temperature Range | −40°C to +85°C - qualified for deployment in automotive cabin modules, industrial PLC I/O, and outdoor metering hardware. |
Applications
| Battery Voltage Monitor | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Monitoring lithium-ion cell voltage during charging to trigger cutoff at 4.2 V. IC Role / Device Role / Timing Role: Differential comparator comparing cell voltage against precision reference to assert shutdown signal. Use Value: 0.7 µs response ensures immediate interruption before overvoltage damages cell chemistry. | Use Scenario: Detecting >5.5 V on a 5-V USB-powered subsystem to disable downstream regulators. IC Role / Device Role / Timing Role: High-speed threshold detector with hysteresis added externally to prevent chatter near trip point. Use Value: 80 µA supply current minimizes parasitic drain on host supply when system is idle. |
| Power Sequencing Controller | Zero-Crossing Detector |
Use Scenario: Verifying 3.3-V rail reaches 90% before enabling 1.8-V FPGA core supply. IC Role / Device Role / Timing Role: Precision window comparator stage generating enable pulse only when voltage is within valid band. Use Value: ≤9 mV input offset ensures accurate 3.0-V trip point without calibration overhead. | Use Scenario: Converting AC line voltage into clean digital zero-crossing pulses for TRIAC firing control. IC Role / Device Role / Timing Role: High-slew-rate comparator converting sinusoidal input to square wave synchronized to AC phase. Use Value: Rail-to-rail input range accepts ±1 V AC signal centered at 2.5 V without external biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Slower response (1.3 µs typ), higher ICC (500 µA typ), wider VCC range (2–36 V), no guaranteed 3-V operation | Used in legacy 12-V industrial controls; less suitable for <3.6-V battery systems | Select when wide supply range and cost are primary; avoid for low-power or fast-response needs. |
| TLV7011DBVR | CMOS input (pA bias), lower ICC (380 nA), slower response (2.5 µs), same SOT-23-5 package | Preferred for ultra-low-power sensor wake-up circuits where speed is secondary to current draw | Choose for nanowatt standby modes; not recommended for sub-microsecond timing-critical paths. |
Compared with LM393DR and TLV7011DBVR, the TLV1391IDBVT uniquely balances microamp-level supply current, sub-microsecond speed, and guaranteed 3-V functionality - making it optimal for next-generation portable and industrial edge devices requiring both efficiency and responsiveness.
Availability
TLV1391IDBVT is available at Aetrix Electronics and suitable for battery management systems, industrial power monitors, and embedded safety interlocks requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLV1391IDBVT 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TLV1391IDBVT belongs to TI's low-voltage precision comparator product line, engineered specifically to replace legacy comparators like LM393 in modern 3-V/5-V systems where speed, power, and input range are constrained.
FAQ
What is the operating temperature range for TLV1391IDBVT?
The TLV1391IDBVT is rated for industrial operation from −40°C to +85°C. This specification is confirmed in the "recommended operating conditions" table of the official datasheet (SLCS128F, Rev. June 2007), and applies to all electrical characteristics including input offset voltage, response time, and supply current across the full range. The "I" suffix in TLV1391IDBVT explicitly denotes this industrial-grade qualification.
Does TLV1391IDBVT have an internal voltage reference?
No, the TLV1391IDBVT does not include an internal voltage reference. It is a standalone differential comparator requiring external reference voltages applied to its IN+ and IN− inputs. The device's rail-to-rail input range (0 V to VCC−2 V) allows direct connection to precision external references such as TLV431 or resistor-divider networks without level-shifting circuitry.
Can TLV1391IDBVT drive a MOSFET gate directly?
Yes, TLV1391IDBVT can drive a low-threshold MOSFET gate directly via its open-collector output. With a 20 mA maximum sink current and compatible pull-up to VCC or another logic rail, it provides sufficient current to charge/discharge gate capacitance of small-signal MOSFETs (e.g., 2N7002, DMN2004) in switching applications like load switches or LED drivers - provided gate voltage requirements fall within the selected pull-up rail.
Is TLV1391IDBVT pin-compatible with LM393?
No, TLV1391IDBVT is not pin-compatible with LM393. The LM393 uses an 8-pin SOIC or PDIP package with dual comparators, while TLV1391IDBVT is a single comparator in a 5-pin SOT-23 (DBV) package. Pin mapping differs entirely: TLV1391IDBVT uses pins 1–5 for IN−, GND, IN+, VCC, OUT; LM393 has separate inputs/outputs per channel and shared VCC/GND. Board redesign is required for substitution.
What is the maximum capacitive load TLV1391IDBVT can drive reliably?
The TLV1391IDBVT is characterized with CL = 15 pF in its switching specifications (response time tested at 15 pF). While not explicitly rated for higher loads, stability and response time degrade with increasing capacitance due to output stage limitations. For reliable operation beyond 15 pF, add a series resistor (e.g., 100 Ω) between OUT and the load to isolate capacitance and prevent ringing - especially when driving long PCB traces or logic inputs with high input capacitance.
TLV1391IDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Differential
- Number of Elements:
- 1
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 7V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 175µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
TLV1391IDBVT FAQ
1.How can I place an order for TLV1391IDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV1391IDBVT 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 TLV1391IDBVT reliable?
The price and inventory of TLV1391IDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1391IDBVT is usually 5 days.
3.What payment methods are accepted for TLV1391IDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV1391IDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV1391IDBVT?
TLV1391IDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV1391IDBVT 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 TLV1391IDBVT?
For technical support, including TLV1391IDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1391IDBVT requirements.
6.How does Aetrix verify that TLV1391IDBVT is sourced from the original manufacturer or authorized distributors?
All TLV1391IDBVT 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 TLV1391IDBVT meets industry standards.
7.What is the process for return or replacement of TLV1391IDBVT?
All TLV1391IDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TLV1391IDBVT, 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 TLV1391IDBVT part is unused and in its original packaging.
Return procedure for TLV1391IDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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