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Texas Instruments TLV840CADL40DBVR
- Part No.:
- TLV840CADL40DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV840CADL40DBVR.pdf
- Description:
- LOW-VOLTAGE SUPERVISOR WITH ADJU
- Quantity:
- Payment:
- Shipping:
Inventory:1,263
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Product details
Overview
TLV840CADL40DBVR from Texas Instruments is a nano-power ultra-low-voltage supervisor IC with open-drain active-low reset output, 0.8 V detection threshold, 40 µs fixed reset time delay, and 120 nA typical supply current. It operates from 0.7 V to 6 V, features ±0.5% threshold accuracy and 5% built-in hysteresis, and is used in battery-powered microcontroller power-up sequencing and industrial voltage monitoring.
For engineers reviewing the TLV840CADL40DBVR datasheet, TLV840CADL40DBVR pinout, TLV840CADL40DBVR application, or TLV840CADL40DBVR equivalent, key selection criteria include ultra-low quiescent current, precise sub-1-V threshold detection, SOT23-5 package compatibility, capacitor-free 40 µs reset timing, and open-drain output for flexible pull-up voltage translation up to 6.5 V.
Technical Context
The TLV840CADL40DBVR implements a precision bandgap-based comparator with hysteresis to monitor VDD against a factory-trimmed 0.8 V threshold (VIT−). Its internal timer asserts RESET low for exactly 40 µs (typical) after VDD rises above VIT− + VHYS, with no external capacitor required-CT pin is unused and internally disconnected in the 'A' delay variant.
This device belongs to the TLV840C family (capacitor-programmable delay), but the 'A' suffix denotes fixed 40 µs timing-confirmed by TI's naming nomenclature and electrical characteristics table. It lacks manual reset (MR) functionality (no MR pin), distinguishing it from TLV840M variants, and uses open-drain output requiring an external pull-up resistor for logic-high assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 0.7 V to 6 V - supports direct monitoring of ultra-low-voltage rails (e.g., 0.9 V LDO outputs) and standard 3.3 V/5 V systems. |
| Threshold Voltage (VIT−) | 0.8 V ±0.5% (typ) - factory-set fixed value enabling reliable brownout detection at sub-1-V levels with minimal drift over temperature. |
| Reset Time Delay (tD) | 40 µs (typ), 80 µs (max) - fixed, capacitor-free delay ensures predictable power-up timing without BOM overhead or layout sensitivity. |
| Quiescent Current (IDD) | 120 nA (typ) at 2 V - enables multi-year battery life in always-on IoT sensors and wearables without compromising supervision reliability. |
| Output Type | Open-drain, active-low (RESET) - allows level-shifting via external pull-up to any voltage ≤6.5 V, independent of VDD, supporting mixed-voltage SoC interfaces. |
| Operating Temperature | –40°C to +125°C - qualified for industrial motor drives, factory automation, and automotive under-hood auxiliary monitoring. |
| Hysteresis (VHYS) | 5% (typ) of VIT− - prevents false resets during noisy supply transients by requiring VDD to rise 40 mV above 0.8 V before deasserting RESET. |
Pinout & Package
TLV840CADL40DBVR is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained PCB layouts in portable and industrial equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low output | Drives low when VDD < 0.8 V or during 40 µs delay; requires external pull-up resistor (e.g., 10–100 kΩ) to define high-level voltage and sink capability. |
| 2 - VDD | Supply input & monitored rail | Both powers the IC and serves as the voltage source under supervision; accepts 0.7–6 V with nanoamp quiescent draw. |
| 3 - GND | Ground reference | Common return path for internal comparator, timer, and output stage; must be low-impedance to ensure accurate threshold detection. |
| 4 - NC | No-connect | Internally unconnected; recommended to tie to GND for mechanical stability and EMI reduction-no electrical function. |
| 5 - CT | Capacitor time-delay input | Not functional in TLV840CADL40DBVR ('A' delay variant); left floating per datasheet-no external capacitor needed for 40 µs timing. |
Key Features
| Feature | Design Value |
|---|---|
| Nano-power operation | 120 nA typical supply current enables >10-year battery life in coin-cell-powered devices without sacrificing supervision fidelity. |
| Sub-1-V threshold accuracy | ±0.5% typical tolerance at 0.8 V ensures consistent brownout response across production lots and temperature extremes. |
| Fixed 40 µs reset delay | Eliminates need for external timing capacitor, reducing BOM count, board area, and parametric variation in timing-critical power sequencing. |
| Open-drain output with 6.5 V abs max | Permits RESET signal translation to higher logic domains (e.g., 3.3 V or 5 V MCU I/O) using a single pull-up resistor, simplifying level-shifting design. |
| Built-in 5% hysteresis | Guarantees clean, bounce-free reset release by requiring VDD to recover 40 mV above trip point-critical for noisy industrial power rails. |
Applications
| Motor Drives | Factory Automation |
|---|---|
|
Use Scenario: Monitoring gate-driver supply voltage in BLDC motor inverters to prevent shoot-through during undervoltage conditions. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to disable PWM controller when 12 V auxiliary rail drops below 0.8 V × (1 + hysteresis). Use Value: Prevents MOSFET short-circuit failure by enforcing 40 µs minimum disable window after brownout recovery-guaranteed by fixed internal timing. |
Use Scenario: Supervising PLC I/O module power rails exposed to long cable runs and inductive switching noise. IC Role / Device Role / Timing Role: Detecting dips on 3.3 V logic supply caused by solenoid actuation, triggering system-wide reset via open-drain RESET line. Use Value: 5% hysteresis rejects 40 mV transients while 120 nA IDD minimizes self-heating in sealed enclosures-ensuring stable operation at 125°C ambient. |
| Electronic Point of Sale | Data Center Power Management |
|
Use Scenario: Ensuring reliable boot of ARM-based POS terminals powered by Li-ion batteries discharging from 4.2 V to 3.0 V. IC Role / Device Role / Timing Role: Resetting application processor when battery voltage falls below 0.8 V reference-scaled via resistive divider to match actual rail. Use Value: 0.7 V minimum operating voltage allows supervision down to deeply discharged cells; 40 µs delay synchronizes with processor POR requirements. |
Use Scenario: Monitoring standby 3.3 V rail in server management controllers (BMCs) to maintain watchdog integrity during AC loss events. IC Role / Device Role / Timing Role: Providing fail-safe reset pulse to BMC upon 3.3 V rail collapse, with open-drain output pulled to 1.8 V domain for ASIC compatibility. Use Value: Independent pull-up voltage support enables direct interface to low-voltage logic without level translators-reducing component count and latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3840DL25DBVR | 0.25 V threshold, 350 nA IDD, same SOT23-5 package, but requires external capacitor for programmable delay (no fixed 40 µs option) | Used where lower detection voltage is needed (e.g., 0.3 V LDO outputs); delay must be set externally, increasing BOM and layout complexity | Select when sub-0.8 V brownout detection is mandatory and timing flexibility outweighs fixed-delay simplicity |
| TLV809EC29DBVR | 2.93 V fixed threshold, 480 nA IDD, push-pull active-low output, no CT pin, 200 ms fixed delay | Targets mid-rail supervision (e.g., 3.3 V systems); higher current draw and longer delay suit less timing-critical applications | Choose for cost-sensitive 3.3 V monitoring where 200 ms reset hold time is acceptable and open-drain level shifting is unnecessary |
Compared with TPS3840DL25DBVR and TLV809EC29DBVR, TLV840CADL40DBVR uniquely delivers sub-1-V detection with nanoamp quiescent current and capacitor-free 40 µs timing-making it optimal for ultra-low-power, fast-recovery embedded systems where precision and minimal footprint are critical.
Availability
TLV840CADL40DBVR is available at Aetrix Electronics and suitable for battery-powered IoT sensors, industrial motor control boards, and data center management controllers requiring stable component supply, long-term lifecycle assurance, and guaranteed traceability.
Supply support for TLV840CADL40DBVR 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, embedded processing, and connectivity solutions with emphasis on reliability, energy efficiency, and system integration.
The TLV840CADL40DBVR belongs to TI's nano-power voltage supervisor product line, engineered specifically for ultra-low-voltage monitoring in battery-constrained and thermally demanding applications-prioritizing sub-1-V accuracy, <150 nA current, and robust transient immunity.
FAQ
What is the exact threshold voltage of TLV840CADL40DBVR?
The TLV840CADL40DBVR has a factory-trimmed fixed negative threshold voltage (VIT−) of 0.8 V with ±0.5% typical accuracy across –40°C to +125°C. This value is confirmed in TI's device nomenclature guide ('08' = 0.8 V) and electrical characteristics table, and does not require external resistor programming.
Does TLV840CADL40DBVR require an external capacitor for its 40 µs reset delay?
No, TLV840CADL40DBVR does not require an external capacitor. The 'A' suffix in the part number indicates fixed 40 µs delay; the CT pin is non-functional and must be left floating per datasheet guidance. This eliminates timing component variability and reduces PCB area versus capacitor-programmable variants.
Can TLV840CADL40DBVR monitor a 1.2 V rail directly?
No-TLV840CADL40DBVR's 0.8 V threshold is fixed and cannot be adjusted. To supervise a 1.2 V rail, use a resistive divider to scale the rail down to 0.8 V at VDD (e.g., 400 kΩ + 800 kΩ), ensuring divider current remains <<120 nA to avoid loading error and maintaining accuracy within ±0.5%.
What is the maximum allowable pull-up voltage on the RESET pin of TLV840CADL40DBVR?
The RESET pin of TLV840CADL40DBVR supports a maximum pull-up voltage of 6.5 V, independent of VDD. This allows interfacing with higher-voltage logic domains (e.g., 5 V MCUs) while VDD operates at 0.7–6 V-enabling flexible level translation without additional components.
Is there a manual reset (MR) input on TLV840CADL40DBVR?
No, TLV840CADL40DBVR does not include a manual reset input. Pin 4 is designated NC (no-connect), and the device belongs to the TLV840C family without MR functionality-unlike TLV840M variants. System-level reset initiation must be handled externally via VDD control or separate circuitry.
TLV840CADL40DBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 40µs Typical
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TLV840CADL40DBVR FAQ
1.How can I place an order for TLV840CADL40DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV840CADL40DBVR 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 TLV840CADL40DBVR reliable?
The price and inventory of TLV840CADL40DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV840CADL40DBVR is usually 5 days.
3.What payment methods are accepted for TLV840CADL40DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV840CADL40DBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV840CADL40DBVR?
TLV840CADL40DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV840CADL40DBVR 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 TLV840CADL40DBVR?
For technical support, including TLV840CADL40DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV840CADL40DBVR requirements.
6.How does Aetrix verify that TLV840CADL40DBVR is sourced from the original manufacturer or authorized distributors?
All TLV840CADL40DBVR 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 TLV840CADL40DBVR meets industry standards.
7.What is the process for return or replacement of TLV840CADL40DBVR?
All TLV840CADL40DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TLV840CADL40DBVR, 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 TLV840CADL40DBVR part is unused and in its original packaging.
Return procedure for TLV840CADL40DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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