My Inquiry
My Account
Texas Instruments TLV1391CDBV
- Part No.:
- TLV1391CDBV
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- -
- Datasheet:
-
TLV1391CDBV.pdf
- Description:
- SINGLE COMPARATOR
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLV1391CDBV 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, rail-to-rail input common-mode range including ground, and SOT-23-5 package - used in precision voltage monitoring and level-shifting circuits in battery-powered sensor interfaces.
For engineers reviewing the TLV1391CDBV datasheet, TLV1391CDBV pinout, TLV1391CDBV application, or TLV1391CDBV equivalent, key selection criteria include input offset voltage (≤5 mV typ), output drive capability (±500 µA), operating temperature range (0°C to 70°C), and compatibility with 3-V/5-V logic systems requiring fast, low-power analog decision-making.
Technical Context
The TLV1391CDBV implements a bipolar comparator core with enhanced speed and low-voltage performance over legacy LM393 designs. It supports rail-to-rail input operation down to ground and delivers TTL-compatible open-collector output with 20 mA absolute maximum sink current.
Its internal architecture includes 26 transistors, 1 resistor, 4 diodes, and 1 Epi-FET, enabling stable operation across 2 V–7 V supply while maintaining sub-millivolt input offset and nanosecond-scale propagation delay under 5-mV overdrive conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 7 V - enables direct integration into 3.3-V and 5-V systems without level-shifting circuitry. |
| Response Time | 0.7 µs typ at 3 V - supports fast edge detection in motor control feedback or power sequencing monitors. |
| Input Offset Voltage | 5 mV max at 25°C - ensures accurate threshold comparison in precision battery voltage supervision. |
| Supply Current | 80 µA typ - allows continuous operation in always-on IoT sensor nodes with multi-year battery life. |
| Common-Mode Input Range | 0 V to VCC−2 V - permits direct sensing of signals referenced to ground in single-supply data acquisition. |
| Output Sink Current | 500 µA min at VOL = 300 mV - drives standard LED indicators or small-signal MOSFET gates directly. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded control and industrial HMI applications. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm footprint, 1.45 mm max height, lead-free NIPDAU finish, MSL Level-1, compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting input | Differential reference node; accepts signals up to VCC−2 V with ground-inclusive common-mode range. |
| 2 (GND) | Ground reference | Return path for supply and signal; shared with VCC− in single-supply configuration. |
| 3 (IN+) | Non-inverting input | Active input for threshold comparison; supports rail-to-rail input swing including ground. |
| 4 (VCC) | Positive supply | Single supply rail (2–7 V); powers internal bipolar circuitry and defines output high-level potential. |
| 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 down to 2 V supply - eliminates need for voltage regulators in coin-cell or Li-ion powered devices. |
| Fast propagation delay | 0.65 µs typ at 5 V - enables real-time overvoltage protection in DC-DC converter feedback loops. |
| Rail-to-rail input range | Includes ground and extends to VCC−2 V - simplifies interface with sensors and ADCs sharing same supply rail. |
| Low quiescent current | 80 µA typ - reduces system standby power by >90% versus LM393 in always-monitoring applications. |
| Specified at 3 V and 5 V | Full electrical characterization at both voltages - removes design uncertainty when migrating between supply domains. |
Applications
| Battery Voltage Monitor | Power Sequencing Controller |
|---|---|
|
Use Scenario: Monitoring lithium-ion cell voltage during charging/discharging to trigger cutoff or alert thresholds. IC Role / Device Role / Timing Role: Single-supply comparator detecting when cell voltage crosses 4.2 V (full) or 3.0 V (low). Use Value: Enables precise, low-power state-of-charge indication without burdening battery with regulator overhead. |
Use Scenario: Enabling downstream subsystems only after primary power rails stabilize within tolerance. IC Role / Device Role / Timing Role: Comparing monitored rail voltage against reference to generate enable signal with <1 µs latency. Use Value: Prevents latch-up or initialization failure in FPGAs and microcontrollers by enforcing strict power-up order. |
| Overcurrent Detection Circuit | Optical Sensor Threshold Detector |
|
Use Scenario: Converting shunt resistor voltage drop into digital flag when load current exceeds safe limit. IC Role / Device Role / Timing Role: High-speed comparator comparing sense voltage to precision reference with minimal propagation delay. Use Value: Delivers 0.7 µs response to fault condition - faster than most MCU ADC-based detection methods. |
Use Scenario: Detecting presence/absence of IR light in proximity or ambient light sensing modules. IC Role / Device Role / Timing Role: Differential comparator rejecting common-mode noise from photodiode amplifier output. Use Value: Improves false-trigger immunity in noisy environments due to inherent CMRR and rail-to-rail input headroom. |
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), no ground-inclusive input range. | Preferred in high-voltage industrial systems where speed and ultra-low power are secondary to robustness. | Choose LM393DR only if operating above 7 V or requiring higher output drive; not suitable for 3-V battery systems. |
| TLV7211CDBVR | CMOS input stage (pA bias current), 1.8-V min supply, 1.5 µs response, rail-to-rail output, but no open-collector output. | Better for high-impedance sensor interfaces and ultra-low-power wake-up circuits needing push-pull output. | Choose TLV7211CDBVR when input bias current <1 pA is critical or when push-pull output eliminates pull-up resistor. |
Compared with LM393DR and TLV7211CDBVR, the TLV1391CDBV uniquely balances sub-µs speed, 80-µA quiescent current, and open-collector output in a 2-V–7-V supply envelope - making it optimal for cost-sensitive, battery-operated comparators where fast, low-power, logic-compatible sinking is required.
Availability
TLV1391CDBV is available at Aetrix Electronics and suitable for battery management systems, power sequencing controllers, overcurrent protection modules, and optical sensor interfaces requiring stable component supply across commercial temperature ranges.
Supply support for TLV1391CDBV 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 consumer markets.
The TLV1391CDBV belongs to TI's low-voltage precision comparator product line, designed specifically to replace legacy dual comparators like LM393 in modern 3-V and 5-V systems demanding improved speed, lower power, and ground-referenced input capability.
FAQ
What is the maximum supply voltage rating for TLV1391CDBV?
The TLV1391CDBV has an absolute maximum supply voltage (VCC) of 7 V. Exceeding this value risks permanent damage. For reliable operation, TI specifies recommended VCC between 2 V and 7 V, with full electrical characterization at 3 V and 5 V. The TLV1391CDBV must never be operated above 7 V, even momentarily, to ensure long-term reliability and avoid junction breakdown.
Does TLV1391CDBV support rail-to-rail input operation?
Yes, the TLV1391CDBV supports a common-mode input voltage range that includes ground and extends up to VCC−2 V. This allows direct connection of sensors or signal sources referenced to ground without level-shifting circuitry. At 3 V supply, the valid input range is 0 V to 1.0 V; at 5 V, it is 0 V to 3.0 V - confirmed across full temperature range per datasheet Section 6.3.
What is the output configuration of TLV1391CDBV?
The TLV1391CDBV features an open-collector output (Pin 5), requiring an external pull-up resistor to define the high logic level. It can sink up to 20 mA continuously, with 500 µA guaranteed minimum sink current at VOL ≤ 300 mV. This configuration enables wired-OR logic, level translation, and direct LED driving - a key distinction from push-pull output comparators like TLV7211.
Is TLV1391CDBV pin-compatible with LM393?
No, TLV1391CDBV is not pin-compatible with LM393. The TLV1391CDBV uses a 5-pin SOT-23 package (IN−, GND, IN+, VCC, OUT), whereas LM393 uses an 8-pin SOIC or PDIP package with dual comparators and different pin assignments. While TLV1391CDBV is positioned as a functional upgrade for single-comparator use cases, PCB layout changes are required for replacement.
What is the typical input offset voltage of TLV1391CDBV at room temperature?
The TLV1391CDBV has a typical input offset voltage of 1.5 mV and a maximum of 5 mV at 25°C, as specified in the "Electrical Characteristics" table for VCC = 3 V and VCC = 5 V. This low offset enables accurate threshold detection in precision applications such as battery end-of-charge monitoring or reference voltage validation, where errors below 10 mV are critical.
TLV1391CDBV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Number of Elements:
- -
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- -
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- -
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- :
- -
TLV1391CDBV FAQ
1.How can I place an order for TLV1391CDBV through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV1391CDBV 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 TLV1391CDBV reliable?
The price and inventory of TLV1391CDBV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1391CDBV is usually 5 days.
3.What payment methods are accepted for TLV1391CDBV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV1391CDBV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV1391CDBV?
TLV1391CDBV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV1391CDBV 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 TLV1391CDBV?
For technical support, including TLV1391CDBV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1391CDBV requirements.
6.How does Aetrix verify that TLV1391CDBV is sourced from the original manufacturer or authorized distributors?
All TLV1391CDBV 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 TLV1391CDBV meets industry standards.
7.What is the process for return or replacement of TLV1391CDBV?
All TLV1391CDBV units undergo pre-shipment inspection (PSI). If there is an issue with TLV1391CDBV, 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 TLV1391CDBV part is unused and in its original packaging.
Return procedure for TLV1391CDBV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLV1391CDBV Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
