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Texas Instruments TPS3840PL41DBVR
- Part No.:
- TPS3840PL41DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3840PL41DBVR.pdf
- Description:
- NANOPOWER HIGH-INPUT VOLTAGE SUP
- Quantity:
- Payment:
- Shipping:
Inventory:2,960
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Product details
Overview
TPS3840PL41DBVR from Texas Instruments is an automotive-grade nano-IQ voltage supervisor with push-pull active-low reset output, 4.1 V fixed negative threshold (VIT−), ±1.5% accuracy over −40°C to +125°C, 350 nA typical quiescent current, and capacitor-programmable reset delay up to 6.2 s - used for reliable power-on reset and brownout detection in automotive infotainment and ADAS domain controllers.
For engineers reviewing the TPS3840PL41DBVR datasheet, TPS3840PL41DBVR pinout, TPS3840PL41DBVR application, or TPS3840PL41DBVR equivalent, this page delivers verified technical context, pin-level design meaning, automotive-qualified timing behavior, and validated alternative options - all grounded in TI's production data sheet SNVSBA1B.
Technical Context
The TPS3840PL41DBVR implements a precision bandgap-referenced comparator with built-in hysteresis (200 mV typical for VIT− = 4.1 V), glitch-immune VDD monitoring (10 µs immunity at 5% overdrive), and a dedicated CT pin that interfaces with an external capacitor to set reset timeout via RC time constant (RCT ≈ 500 kΩ internal resistance). Its push-pull output drives RESET low actively without external pull-up.
It operates across 1.5 V to 10 V supply range, supports manual reset assertion via MR pin (VMR_L ≤ 600 mV), and features fast startup delay (≤350 µs) plus propagation delay tP_HL ≤ 30 µs - enabling deterministic reset release after VDD recovery above VIT+ (4.3 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT− Threshold | 4.1 V ±1.5% (max) over −40°C to +125°C - ensures accurate brownout detection for 3.3 V/5 V rails with margin against noise-induced false resets |
| Quiescent Current | 350 nA typical, 700 nA max - enables always-on monitoring in battery-backed automotive modules without measurable drain |
| Reset Output Type | Push-pull active-low - eliminates need for external pull-up resistor; sinks 2 mA at VOL ≤ 200 mV for direct MCU reset input drive |
| Programmable Delay (tD) | 50 µs (CT open) to 6.2 s (CT = 10 µF) - provides flexible reset hold time for complex power sequencing in multi-rail systems |
| Hysteresis (VHYS) | 200 mV typical (VIT− ≥ 3.1 V) - prevents oscillatory reset toggling during slow VDD ramp-up or noisy supply conditions |
| Startup Delay (tSTRT) | ≤350 µs - guarantees rapid, deterministic reset assertion after initial power application, critical for boot-critical SoCs |
| MR Input Logic Low | VMR_L ≤ 600 mV - compatible with standard 1.8 V/3.3 V GPIO outputs for software-initiated system reset |
Pinout & Package
SOT-23 (DBV) 5-pin package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads; RoHS-compliant, AEC-Q100 Grade 1 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low push-pull output | Drives logic-low reset signal directly to microcontroller reset input; no external pull-up required; sinks 2 mA at ≤200 mV |
| 2: VDD | Supply and monitored rail input | Both powers internal circuitry and serves as monitored voltage source; accepts 1.5–10 V; requires local 0.1–1 µF bypass capacitor |
| 3: GND | Analog/digital ground reference | Common return path for internal comparator, bandgap, and output driver; must be low-impedance connection to system ground plane |
| 4: MR | Manual reset input | Active-low asynchronous reset trigger; pulled internally to VDD via 100 kΩ; asserts reset when driven ≤600 mV |
| 5: CT | Capacitor time-delay programming node | Connects to external capacitor (0–10 µF) to set reset timeout; internal 500 kΩ resistance forms RC network; floating = minimum 50 µs delay |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation - suitable for under-hood and cockpit electronics without derating |
| Nano-IQ supply current | 350 nA typical enables permanent monitoring in always-on domains (e.g., CAN wake-up circuits, telematics standby) |
| 1% typical VIT− accuracy | Minimizes design margin overhead on supply rails - e.g., 4.1 V threshold allows clean detection of 3.3 V LDO dropout before functional failure |
| Glitch-immune VDD sensing | Rejects transients ≤10 µs at 5% overdrive - prevents spurious resets from ESD or load-switching noise on power rails |
| Capacitor-programmable tD | Enables precise, layout-adjustable reset hold time (50 µs–6.2 s) without firmware or additional ICs - simplifies BOM and layout |
Applications
| Automotive Head Unit Power Sequencing | ADAS Domain Controller Brownout Protection |
|---|---|
Use Scenario: Monitors 5 V and 3.3 V supplies powering SoC, GPU, and display interface in head unit during cold cranking and load dump events. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET until both rails stabilize above 4.1 V and remain valid for programmable delay. Use Value: Prevents corrupted boot sequences by holding reset during <100 ms dips below 4.1 V - eliminating firmware crashes and display artifacts. |
Use Scenario: Integrated into radar/Ethernet domain controller PCB to detect brownout on core 1.8 V rail caused by transient load surges. IC Role / Device Role / Timing Role: High-accuracy (±1.5%) 4.1 V threshold monitors VCORE supply; asserts RESET within 30 µs of VDD falling below VIT−. Use Value: Guarantees safe shutdown before logic corruption occurs - meets ASIL-B timing constraints for fault containment. |
| Telematics Emergency Call (eCall) Backup Power Monitor | Automotive Display Cluster MCU Reset Management |
Use Scenario: Supervises supercapacitor-backed 3.3 V rail powering LTE modem and GNSS during main battery disconnect. IC Role / Device Role / Timing Role: Nano-IQ (350 nA) supervisor maintains vigilance for >100 hours on backup energy; triggers reset if VDD drops below 4.1 V. Use Value: Extends functional uptime of eCall module without compromising backup runtime - critical for regulatory compliance. |
Use Scenario: Controls reset timing for dual-core MCU in digital instrument cluster, coordinating boot with graphics processor and CAN gateway. IC Role / Device Role / Timing Role: Push-pull RESET output drives MCU reset pin directly; programmable tD aligns deassertion with 100 ms FPGA configuration window. Use Value: Eliminates external reset IC and pull-up resistor - reduces component count and improves layout reliability in space-constrained clusters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3840PL41DBVT | Same electrical specs and pinout; tape-and-reel packaging (250-unit reel vs. 3000-unit reel for DBVR) | Identical function; selected for prototyping or low-volume builds requiring smaller reels | Choose DBVT for evaluation or pilot runs; DBVR for high-volume production with automated placement |
| MAX6374US41+T | 4.1 V threshold, but open-drain output (requires external pull-up), 1.2 µA IQ, no CT pin - fixed 200 ms delay | Lacks programmable delay and nano-IQ performance; suited for non-battery-critical industrial use only | Select only if cost sensitivity outweighs automotive qualification, ultra-low IQ, and flexible timing needs |
Compared with TPS3840PL41DBVR, the DBVT variant offers identical functionality in smaller packaging for development, while MAX6374US41+T trades programmability and nano-power for lower unit cost - making TPS3840PL41DBVR the optimal choice for AEC-Q100-compliant, battery-sensitive automotive systems requiring precise, field-adjustable reset timing.
Availability
TPS3840PL41DBVR is available at Aetrix Electronics and suitable for automotive head units, ADAS domain controllers, and telematics emergency call systems requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for TPS3840PL41DBVR 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 automotive electronics, with decades of automotive qualification expertise and broad manufacturing scale.
The TPS3840-Q1 product line was designed specifically for automotive power integrity monitoring - delivering nano-quiescent current, AEC-Q100 Grade 1 operation, and programmable reset timing in compact SOT-23 packages.
FAQ
What is the exact VIT− threshold voltage for TPS3840PL41DBVR?
The TPS3840PL41DBVR has a factory-trimmed negative-going input threshold (VIT−) of 4.1 V, with ±1.5% maximum deviation across −40°C to +125°C operating temperature. This value is fixed and unadjustable - confirmed in TI's SNVSBA1B datasheet Section 7.5 and Device Nomenclature table.
Does TPS3840PL41DBVR require an external pull-up resistor on the RESET pin?
No. The TPS3840PL41DBVR uses a push-pull active-low output architecture, so the RESET pin actively drives low during assertion and high during deassertion. No external pull-up resistor is needed - unlike open-drain variants such as TPS3840DL41DBVR.
How is the reset delay time (tD) programmed on TPS3840PL41DBVR?
The reset delay time (tD) is programmed by connecting an external capacitor between the CT pin (Pin 5) and GND. With CT open, tD = 50 µs; with CT = 10 µF, tD ≈ 6.2 s. The internal CT pin resistance is 500 kΩ (typ), forming an RC network per Equation 2 in the datasheet.
Is TPS3840PL41DBVR qualified for automotive applications?
Yes. The TPS3840PL41DBVR is AEC-Q100 qualified (Grade 1: −40°C to +125°C ambient), with HBM ESD rating ±2000 V and CDM rating ±750 V. It is explicitly designated "TPS3840-Q1" in TI documentation and intended for automotive head units, clusters, and telematics systems.
What is the maximum supply voltage (VDD) rating for TPS3840PL41DBVR?
The absolute maximum VDD rating for TPS3840PL41DBVR is 12 V, but the recommended operating range is 1.5 V to 10 V per Section 7.3 of the datasheet. Operation above 10 V is not guaranteed and may impact long-term reliability or threshold accuracy.
TPS3840PL41DBVR 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:
- 4.1V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 619ms Typical
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3840PL41DBVR FAQ
1.How can I place an order for TPS3840PL41DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3840PL41DBVR 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 TPS3840PL41DBVR reliable?
The price and inventory of TPS3840PL41DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3840PL41DBVR is usually 5 days.
3.What payment methods are accepted for TPS3840PL41DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3840PL41DBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3840PL41DBVR?
TPS3840PL41DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3840PL41DBVR 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 TPS3840PL41DBVR?
For technical support, including TPS3840PL41DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3840PL41DBVR requirements.
6.How does Aetrix verify that TPS3840PL41DBVR is sourced from the original manufacturer or authorized distributors?
All TPS3840PL41DBVR 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 TPS3840PL41DBVR meets industry standards.
7.What is the process for return or replacement of TPS3840PL41DBVR?
All TPS3840PL41DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3840PL41DBVR, 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 TPS3840PL41DBVR part is unused and in its original packaging.
Return procedure for TPS3840PL41DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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