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Texas Instruments TLV1391CDBVT
- Part No.:
- TLV1391CDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV1391CDBVT.pdf
- Description:
- IC COMPARATOR 1 DIFF SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:422
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Product details
Overview
TLV1391CDBVT 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 battery-powered sensor interface circuits.
For engineers reviewing the TLV1391CDBVT datasheet, TLV1391CDBVT pinout, TLV1391CDBVT application, or TLV1391CDBVT equivalent, this page delivers verified electrical specs, SOT-23-5 package details, functional role in threshold detection, and validated alternative comparators for 3-V/5-V embedded systems.
Technical Context
The TLV1391CDBVT employs a bipolar process architecture enabling fast propagation delay with low input bias current (−40 nA typ) and tight input offset voltage (1.5 mV min, 5 mV typ at 25°C). Its open-collector output supports flexible pull-up configurations and direct interfacing with TTL/CMOS logic.
Designed for operation across 0°C to 70°C ambient, it maintains full specification compliance at both 3 V and 5 V supplies, with common-mode input range extending from ground to VCC − 2 V and guaranteed low-level output voltage of 300 mV max at 500 µA sink current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 7 V - enables direct use in Li-ion battery (3.0–3.7 V) and USB-powered (5 V) systems without regulation. |
| Response Time | 0.7 µs typ at 3 V - supports real-time overvoltage/undervoltage detection in power management ICs. |
| Supply Current | 80 µA typ - allows integration into always-on wake-up circuits with multi-year battery life. |
| Input Offset Voltage | 1.5 mV min / 5 mV typ - ensures accurate threshold sensing down to ±5 mV resolution in precision reference comparators. |
| Common-Mode Input Range | 0 V to VCC − 2 V - permits direct ground-referenced signal comparison without level-shifting circuitry. |
| Output Type | Open-collector - enables wired-OR configuration, mixed-voltage interfacing, and programmable hysteresis via external feedback. |
| Input Bias Current | −40 nA typ - minimizes loading error on high-impedance sources such as thermistors or photodiodes. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.45 mm body, surface-mount, lead-free (NiPdAu), moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting input | Differential input node referenced to non-inverting input; accepts signals up to VCC − 2 V. |
| 2 (GND) | Ground reference | Return path for supply and input common-mode; shared with VCC− in single-supply configuration. |
| 3 (IN+) | Non-inverting input | Primary signal input; common-mode range includes ground, enabling zero-reference sensing. |
| 4 (VCC) | Positive supply | Single supply input (2–7 V); no separate VCC− required - simplifies PCB routing. |
| 5 (OUT) | Open-collector output | Active-low output requiring external pull-up; sinks up to 20 mA for driving LEDs or logic inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional at 2 V supply - supports energy-harvesting and coin-cell applications where headroom is constrained. |
| Fast propagation delay | 0.65 µs typ at 5 V - reduces latency in closed-loop protection circuits like DC-DC converter overcurrent shutdown. |
| Rail-to-rail input capability | Common-mode range includes ground - eliminates need for negative supply or level-shifter in sensor front-ends. |
| Low quiescent current | 150 µA max across temperature - extends battery runtime in portable medical monitors and IoT endpoint nodes. |
| Specified at 3 V and 5 V | Full parametric validation at both voltages - removes design uncertainty when migrating between battery and USB power domains. |
Applications
| Battery Voltage Monitor | Overvoltage Protection Circuit |
|---|---|
|
Use Scenario: Detecting cell under-voltage (e.g., <3.0 V) in a single Li-ion battery pack to trigger sleep mode before deep discharge. IC Role / Device Role / Timing Role: Threshold comparator comparing battery voltage against a precision reference; asserts low on OUT when VIN falls below setpoint. Use Value: Enables reliable low-power cutoff using only 80 µA supply current and ground-referenced input - no external op-amp or regulator needed. |
Use Scenario: Shutting down a 5-V rail within 1 µs if input exceeds 5.5 V, preventing damage to downstream logic. IC Role / Device Role / Timing Role: Fast-response comparator with hysteresis (via external resistor feedback) detecting overvoltage condition on power supply line. Use Value: 0.65 µs response at 5 V ensures protection activates before transient spikes exceed safe limits for 3.3-V I/O interfaces. |
| Optical Sensor Interface | Microcontroller Wake-Up Trigger |
|
Use Scenario: Converting analog output from an ambient light sensor (0–1 V) into digital ON/OFF signal for display backlight control. IC Role / Device Role / Timing Role: Single-ended comparator with IN+ tied to sensor output and IN− biased to adjustable reference voltage. Use Value: Input bias current of −40 nA avoids loading high-impedance photodiode amplifier outputs, preserving signal fidelity. |
Use Scenario: Waking an MSP430 microcontroller from LPM3 sleep mode when a door switch closes (pulling IN+ high). IC Role / Device Role / Timing Role: Low-power wake-up comparator asserting active-low interrupt signal to MCU's NMI pin via open-collector output. Use Value: 80 µA supply current and guaranteed operation at 2 V allow direct connection to backup coin-cell supply - no wake-up controller IC required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Higher supply current (500 µA typ), slower response (1.3 µs), wider VCC range (2–36 V), dual-channel. | Less suitable for ultra-low-power battery systems but better for industrial 24-V rails with higher noise immunity. | Select LM393DR only when higher supply voltage tolerance or dual-channel integration outweighs power and speed requirements. |
| TLV3701CDBVR | Lower supply current (350 nA typ), rail-to-rail output, 1.5 µs response, same SOT-23-5 package. | Superior for nanowatt standby monitoring but trades off speed - unsuitable for sub-microsecond fault detection. | Choose TLV3701CDBVR when multi-year battery life is critical and response time >1 µs is acceptable. |
Compared with TLV1391CDBVT, LM393DR offers broader voltage support but consumes 6× more current and responds 2× slower; TLV3701CDBVR achieves nanoamp quiescent draw but sacrifices speed by >2× - making TLV1391CDBVT the optimal balance for 3–5 V, sub-µs, medium-power threshold detection.
Availability
TLV1391CDBVT is available at Aetrix Electronics and suitable for battery management systems, power supply supervision, optical sensor interfaces, and microcontroller wake-up circuits requiring stable component supply and long-term sourcing continuity.
Supply support for TLV1391CDBVT 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, embedded processing, and connectivity technologies, with decades of expertise in precision signal chain components.
The TLV1391CDBVT belongs to TI's low-voltage comparator product line, engineered specifically for energy-constrained, single-supply applications in portable electronics and smart sensors - emphasizing speed, accuracy, and minimal power overhead.
FAQ
What is the operating temperature range for TLV1391CDBVT?
The TLV1391CDBVT is rated for operation from 0°C to 70°C ambient temperature. This commercial-grade specification aligns with its "C" suffix designation and is fully characterized per TI's recommended operating conditions - ensuring consistent 0.7 µs response time and 80 µA supply current across the full range.
Does TLV1391CDBVT support rail-to-rail input operation?
Yes, TLV1391CDBVT supports rail-to-rail input common-mode voltage range down to ground (0 V) and up to VCC − 2 V. This allows direct comparison of signals referenced to ground - such as battery voltage or sensor outputs - without external level-shifting circuitry, simplifying design in single-supply systems.
Can TLV1391CDBVT drive a standard TTL input directly?
Yes, TLV1391CDBVT can interface with TTL inputs using an external pull-up resistor to VCC or a higher rail. Its open-collector output sinks up to 20 mA, and with a 1-kΩ pull-up to 5 V, it delivers a valid TTL LOW (<0.8 V) and HIGH (>2.0 V) - confirmed by its VOL ≤300 mV at 500 µA and VOH limited only by the pull-up.
Is TLV1391CDBVT pin-compatible with LM393?
No, TLV1391CDBVT is not pin-compatible with LM393. The TLV1391CDBVT uses a 5-pin SOT-23 package (IN−, GND, IN+, VCC, OUT), while LM393DR uses an 8-pin SOIC or 8-pin PDIP with dual comparators and separate VCC/GND pins. Direct replacement requires PCB layout revision and signal reassignment.
What is the maximum output sink current for TLV1391CDBVT?
The absolute maximum output sink current for TLV1391CDBVT is 20 mA, as specified in the Absolute Maximum Ratings table. For reliable continuous operation, TI recommends limiting sink current to ≤500 µA (per Electrical Characteristics), where VOL remains ≤300 mV - sufficient to drive logic inputs, LEDs with series resistors, or optocouplers in most embedded designs.
TLV1391CDBVT 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:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
TLV1391CDBVT FAQ
1.How can I place an order for TLV1391CDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV1391CDBVT 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 TLV1391CDBVT reliable?
The price and inventory of TLV1391CDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1391CDBVT is usually 5 days.
3.What payment methods are accepted for TLV1391CDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV1391CDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV1391CDBVT?
TLV1391CDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV1391CDBVT 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 TLV1391CDBVT?
For technical support, including TLV1391CDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1391CDBVT requirements.
6.How does Aetrix verify that TLV1391CDBVT is sourced from the original manufacturer or authorized distributors?
All TLV1391CDBVT 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 TLV1391CDBVT meets industry standards.
7.What is the process for return or replacement of TLV1391CDBVT?
All TLV1391CDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TLV1391CDBVT, 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 TLV1391CDBVT part is unused and in its original packaging.
Return procedure for TLV1391CDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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