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Texas Instruments TLV840CADL29DBVR
- Part No.:
- TLV840CADL29DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV840CADL29DBVR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:88,291
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Product details
Overview
TLV840CADL29DBVR from Texas Instruments is a nano-power voltage supervisor IC with open-drain active-low reset output, 2.9 V detection threshold, capacitor-programmable reset delay, and 120 nA typical supply current. It monitors VDD in ultra-low-power systems such as battery-backed microcontrollers, industrial sensors, and smart meters-asserting RESET when VDD drops below 2.9 V and holding it low for a user-defined delay after recovery.
For engineers reviewing the TLV840CADL29DBVR datasheet, TLV840CADL29DBVR pinout, TLV840CADL29DBVR application, or TLV840CADL29DBVR equivalent, key selection criteria include its 0.7–6 V operating range, ±0.5% threshold accuracy, 40 µs minimum delay (CT floating), –40°C to +125°C operation, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The TLV840CADL29DBVR implements a precision bandgap-based comparator with built-in 5% hysteresis (VHYS) and glitch immunity against VDD transients ≥10 µs. Its CT pin enables programmable reset delay via external capacitor (e.g., 0.047 µF yields ~29 ms), while the MR pin is not present-confirming this variant is TLV840C (capacitor-delay only, no manual reset).
It operates across full industrial temperature range with VPOR = 700 mV, ensuring defined reset behavior during power-up. The open-drain RESET output requires an external pull-up resistor and supports rail-to-rail voltage translation up to 6.5 V independent of VDD, enabling flexible interface with diverse logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 0.7 V to 6 V - supports direct monitoring of sub-1V rails (e.g., 0.9V LDO outputs) and standard 3.3V/5V supplies |
| Detection Threshold (VIT−) | 2.9 V ±0.5% (typical) - factory-trimmed fixed threshold enabling precise brownout detection without external resistors |
| Quiescent Current (IDD) | 120 nA (typical at 25°C) - enables multi-year battery life in always-on IoT endpoints and energy-harvesting systems |
| Reset Delay (tD) | Capacitor-programmable (CT pin); 40 µs min (CT floating) - allows fine-grained timing control for power sequencing or firmware initialization windows |
| Output Type | Open-drain, active-low (RESET) - permits wired-OR configuration, level-shifting, and compatibility with 1.8V/3.3V/5V host logic |
| Operating Temperature | –40°C to +125°C - qualified for harsh environments including motor drives, grid infrastructure, and automotive under-hood modules |
| Hysteresis (VHYS) | 5% (typical) - prevents chatter during slow-ramping or noisy supply conditions by requiring VDD to rise to 3.045 V before deasserting RESET |
Pinout & Package
Package: SOT-23-5 (DBV), 2.90 mm × 1.60 mm body size, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low output | Drives low when VDD < 2.9 V or during delay period; requires external pull-up; supports voltage translation up to 6.5 V |
| 2 - VDD | Power input and monitored rail | Supplies internal circuitry and serves as the voltage being supervised; operates down to 0.7 V |
| 3 - GND | Ground reference | Common return path for VDD and internal comparator; must be low-impedance for accurate threshold tracking |
| 4 - NC | No-connect | Internally unconnected; recommended to tie to GND for mechanical stability and EMI reduction |
| 5 - CT | Capacitor time-delay input | Connects to external capacitor (0–10 µF) to set reset delay; floating = 40 µs typical; no MR pin present |
Key Features
| Feature | Design Value |
|---|---|
| Nano-power operation | 120 nA typical IDD enables >10-year battery life in coin-cell-powered devices like smoke detectors and asset trackers |
| High-accuracy threshold | ±0.5% typical VIT− tolerance eliminates need for calibration or trimming in production test |
| Programmable reset timing | CT pin supports 40 µs to >6 s delay range using standard ceramic capacitors-no external timer IC required |
| Robust supply immunity | 10 µs glitch immunity and 5% hysteresis prevent false resets on noisy DC rails in motor drive or industrial PLC environments |
| Wide temperature performance | Specified over –40°C to +125°C with minimal drift ensures reliability in outdoor metering and factory automation |
Applications
| Motor Drives | Factory Automation |
|---|---|
Use Scenario: Monitoring gate-driver supply rails in servo inverters to detect undervoltage before IGBT turn-on. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET to disable PWM controller if 15 V auxiliary rail drops below 13.5 V during regenerative braking. Use Value: Prevents shoot-through failure by enforcing safe power-up sequencing and brownout lockout with <50 µs response latency. | Use Scenario: Supervising 3.3 V MCU and 24 V I/O module supplies in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: TLV840CADL29DBVR monitors 3.3 V rail; its open-drain RESET ties to FPGA configuration reset, ensuring clean boot after power interruption. Use Value: 120 nA quiescent current extends backup battery runtime during mains outage; 2.9 V threshold matches common LDO dropout margins. |
| Grid Infrastructure | Data Center Power Management |
Use Scenario: Detecting AC/DC converter output sag in smart electricity meters during lightning-induced transients. IC Role / Device Role / Timing Role: Resets metrology SoC when 3.3 V rail falls below 2.9 V; CT pin configured for 100 ms delay to ignore brief dips. Use Value: Built-in 5% hysteresis and 10 µs glitch immunity reject line noise without external RC filtering-reducing BOM count. | Use Scenario: Sequencing power rails for ASICs and FPGAs in server motherboards with strict ramp-time requirements. IC Role / Device Role / Timing Role: TLV840CADL29DBVR supervises 1.8 V core rail; RESET enables downstream LDO only after stable 1.8 V is confirmed for 29 ms (0.047 µF on CT). Use Value: Eliminates need for discrete RC timers or dedicated power sequencers-saving board area and improving timing repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3840DL29DBVR | Higher 350 nA IDD, same 2.9 V threshold, fixed 200 ms delay (no CT pin), SOT-23-5 | Not suitable where adjustable delay is required; better for cost-sensitive designs needing only fixed timing | Select if delay flexibility is unnecessary and lower BOM cost outweighs 3× higher current draw |
| MAX6375XR29+T | 2.5 µA IDD, 2.93 V threshold, 140 ms fixed delay, SC70-5 package | SC70-5 footprint incompatible with SOT-23-5 layout; higher current limits use in multi-year battery apps | Choose only if existing SC70 footprint exists and 2.5 µA is acceptable; not drop-in compatible |
Compared with TPS3840DL29DBVR and MAX6375XR29+T, the TLV840CADL29DBVR uniquely delivers nano-power operation *with* programmable delay in a standard SOT-23-5 package-enabling both ultra-long battery life and precise power sequencing in a single component.
Availability
TLV840CADL29DBVR is available at Aetrix Electronics and suitable for motor drives, factory automation systems, and grid infrastructure equipment requiring stable component supply, long-term manufacturability, and guaranteed availability through 2030.
Supply support for TLV840CADL29DBVR 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 90 years of innovation in power management, signal chain, and real-time control ICs.
The TLV840 family is designed specifically for ultra-low-power voltage supervision in battery-critical and industrial-grade applications-prioritizing nanoscale current, high threshold accuracy, and robust transient immunity over feature bloat.
FAQ
What is the exact detection threshold voltage of the TLV840CADL29DBVR?
The TLV840CADL29DBVR has a factory-trimmed negative-going input threshold (VIT−) of 2.9 V with ±0.5% typical accuracy across temperature. This value is fixed and non-adjustable-confirmed by the "29" in the part number per TI's naming convention (0.8 V to 5.4 V in 100 mV steps). The TLV840CADL29DBVR does not require external resistors to set this threshold.
Does the TLV840CADL29DBVR include a manual reset (MR) pin?
No, the TLV840CADL29DBVR does not include a manual reset (MR) pin. Its part number begins with "TLV840C", indicating capacitor-programmable delay only (CT pin present) and no MR functionality. Pin 4 is NC (no-connect), and the functional pinout is RESET/VDD/GND/NC/CT-verified in TI's official datasheet Figure 6-1 and Pin Functions table.
How is the reset time delay programmed on the TLV840CADL29DBVR?
The reset time delay (tD) on the TLV840CADL29DBVR is programmed by connecting an external capacitor between the CT pin (Pin 5) and GND. With CT floating, tD is 40 µs typical. Using Equation tD ≈ 618937 × CCT + 80 µs (CCT in µF), a 0.047 µF capacitor yields ~29 ms delay. Capacitors up to 10 µF are supported, enabling delays from microseconds to >6 seconds.
What is the maximum supply voltage the TLV840CADL29DBVR can monitor?
The TLV840CADL29DBVR can monitor supply voltages up to 6 V, as specified in its Recommended Operating Conditions (0.7 V ≤ VDD ≤ 6 V) and Absolute Maximum Ratings (VDD ≤ 6.5 V). Its 2.9 V threshold makes it ideal for supervising 3.3 V rails, but it remains fully functional when VDD = 6 V-enabling use in wide-input industrial power supplies.
Is the TLV840CADL29DBVR compatible with 1.8 V logic systems?
Yes, the TLV840CADL29DBVR is compatible with 1.8 V logic systems via its open-drain RESET output. When used with a 1.8 V pull-up resistor, RESET asserts to <300 mV (VOL) and releases to 1.8 V-meeting standard LVCMOS input thresholds. Its VDD can be as low as 0.7 V, allowing operation even when monitoring sub-1V rails while interfacing to higher-voltage logic.
TLV840CADL29DBVR 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:
- 2.9V
- 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
TLV840CADL29DBVR FAQ
1.How can I place an order for TLV840CADL29DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV840CADL29DBVR 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 TLV840CADL29DBVR reliable?
The price and inventory of TLV840CADL29DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV840CADL29DBVR is usually 5 days.
3.What payment methods are accepted for TLV840CADL29DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV840CADL29DBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV840CADL29DBVR?
TLV840CADL29DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV840CADL29DBVR 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 TLV840CADL29DBVR?
For technical support, including TLV840CADL29DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV840CADL29DBVR requirements.
6.How does Aetrix verify that TLV840CADL29DBVR is sourced from the original manufacturer or authorized distributors?
All TLV840CADL29DBVR 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 TLV840CADL29DBVR meets industry standards.
7.What is the process for return or replacement of TLV840CADL29DBVR?
All TLV840CADL29DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TLV840CADL29DBVR, 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 TLV840CADL29DBVR part is unused and in its original packaging.
Return procedure for TLV840CADL29DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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