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Texas Instruments TPS3840PL16DBVRQ1
- Part No.:
- TPS3840PL16DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3840PL16DBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,676
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Product details
Overview
TPS3840PL16DBVRQ1 from Texas Instruments is an automotive-grade nano-IQ voltage supervisor with push-pull active-low RESET output, 1.6 V fixed threshold (±1.5% max), 350 nA typical quiescent current, and programmable capacitor-based 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 TPS3840PL16DBVRQ1 datasheet, TPS3840PL16DBVRQ1 pinout, TPS3840PL16DBVRQ1 application, or TPS3840PL16DBVRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), 30 µs typical propagation delay (tP_HL), 100 mV typical hysteresis (for 1.6 V ≤ VIT− ≤ 3.0 V), and SOT-23-5 (DBV) package compatibility with space-constrained automotive PCB layouts.
Technical Context
The TPS3840PL16DBVRQ1 implements a precision bandgap-referenced comparator with built-in hysteresis and glitch immunity on VDD, enabling robust monitoring of low-voltage rails (e.g., 1.8 V core, 3.3 V I/O) under noisy automotive conditions. Its internal CT pin circuitry features a 500 kΩ nominal resistance (RCT) that linearly scales external capacitor value to reset delay time.
It operates across 1.5 V to 10 V supply range while maintaining sub-µA quiescent current over temperature; the push-pull output drives RESET low with 200 mV max VOL at 2 mA sink, eliminating need for external pull-up resistors in most applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT− Threshold | 1.6 V ±1.5% (max) - ensures accurate brownout detection for 1.8 V logic domains without false resets |
| IDD Quiescent Current | 350 nA (typ), 700 nA (max) - enables always-on monitoring in battery-backed automotive modules |
| tP_HL Propagation Delay | 30 µs (typ) - delivers fast response to supply droop, critical for real-time safety-critical subsystems |
| Hysteresis (VHYS) | 100 mV (typ) - prevents oscillation during slow-rising/falling VDD transitions near threshold |
| tD Reset Delay Range | 50 µs (no cap) to 6.2 s (10 µF) - supports flexible system-level power sequencing requirements |
| VOL Output Low Voltage | 200 mV max at 2 mA sink - guarantees clean logic-low assertion into MCU reset inputs without level-shifting |
| Ambient Temp Range | –40°C to +125°C - meets AEC-Q100 Grade 1 for under-hood and cockpit electronics |
Pinout & Package
TPS3840PL16DBVRQ1 uses a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for high-density automotive PCBs with thermal performance RθJA = 187.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low push-pull output | Drives logic-low directly to MCU reset input; no external pull-up required |
| 2: VDD | Supply and monitored rail input | Monitors same rail it powers; accepts 1.5–10 V; bypass capacitor recommended |
| 3: GND | Analog/digital ground reference | Common return for internal comparator, bandgap, and output driver |
| 4: MR | Active-low manual reset input | Pull to ≤600 mV to force reset; internally pulled up to VDD (~100 kΩ) |
| 5: CT | Capacitor time-delay programming node | Connect external capacitor to GND to set tD; floating = minimum 50 µs delay |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C ambient), HBM ±2 kV, CDM ±750 V |
| Nano-IQ operation | 350 nA typical supply current enables permanent monitoring in always-on domains |
| Programmable reset timing | CT pin allows precise, capacitor-based tD tuning from 50 µs to 6.2 s without firmware involvement |
| Glitch-immune VDD sensing | 10 µs minimum pulse rejection at 5% VIT− overdrive prevents false triggers from EMI transients |
| Push-pull active-low output | Eliminates external pull-up resistor, reduces BOM count and layout area in cost-sensitive modules |
Applications
| Automotive Head Unit Power Sequencing | ADAS Domain Controller Brownout Protection |
|---|---|
Use Scenario: Sequential power-up of SoC core (1.8 V), GPU (1.2 V), and interface rails (3.3 V) in infotainment head units. IC Role / Device Role / Timing Role: Monitors 1.8 V VCORE rail and asserts RESET until stable; CT pin delays release to match SoC POR requirements. Use Value: Prevents firmware lockup by ensuring VCORE reaches regulation before SoC exit from reset state. | Use Scenario: Detecting undervoltage on 3.3 V sensor interface rail during engine cranking in camera radar fusion units. IC Role / Device Role / Timing Role: Supervises 3.3 V rail with 100 mV hysteresis; MR pin enables synchronized reset across multiple ECUs via CAN-triggered signal. Use Value: Maintains deterministic fail-safe behavior during transient load dump events without software intervention. |
| Telematics Control Unit (TCU) Backup Power Monitoring | Instrument Cluster Microcontroller Reset Management |
Use Scenario: Validating backup battery voltage (3.0 V) during main power loss in emergency call (eCall) systems. IC Role / Device Role / Timing Role: Uses 1.6 V threshold variant to monitor scaled-down backup rail; nano-IQ extends battery life >10 years. Use Value: Guarantees eCall functionality remains operational after ignition-off for mandated 10-year service life. | Use Scenario: Ensuring clean reset of cluster MCU during cold crank (battery dips to 6 V) and hot restart (fast VDD recovery). IC Role / Device Role / Timing Role: Push-pull RESET output drives MCU nRST directly; fast 30 µs tP_HL captures sub-millisecond dips. Use Value: Eliminates need for RC-based reset circuits, improving timing accuracy and reducing component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3840PL18DBVRQ1 | 1.8 V fixed threshold (vs. 1.6 V); identical package, pinout, and timing specs | Suitable where higher threshold aligns with 2.5 V or 3.3 V rail monitoring instead of 1.8 V core | Select when system VDD nominal is ≥2.0 V and tighter margin above 1.6 V is needed for noise immunity |
| MAX6371KA16+T | 1.6 V threshold, but open-drain output, 1.5 µA IDD, non-automotive grade (commercial temp only) | Lacks AEC-Q100 qualification and nano-IQ; requires external pull-up resistor | Consider only for non-automotive, cost-sensitive industrial designs where qualification and ultra-low IDD are not required |
Compared with TPS3840PL16DBVRQ1, the PL18 variant offers higher threshold headroom for noisy 2.5 V rails, while MAX6371KA16+T trades automotive reliability and power efficiency for lower unit cost in non-safety-critical applications.
Availability
TPS3840PL16DBVRQ1 is available at Aetrix Electronics and suitable for automotive head unit, ADAS domain controller, and telematics control unit applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for TPS3840PL16DBVRQ1 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 for automotive, industrial, and personal electronics markets.
The TPS3840-Q1 product line was designed specifically for automotive voltage supervision - combining ultra-low quiescent current, high-accuracy thresholds, and robust transient immunity to meet stringent ASIL-ready power integrity requirements.
FAQ
What is the exact threshold voltage of TPS3840PL16DBVRQ1 and how is it specified?
The TPS3840PL16DBVRQ1 has a factory-set negative-going input threshold voltage (VIT−) of 1.6 V, with accuracy of ±1.5% maximum over –40°C to +125°C ambient temperature. This value is laser-trimmed during production and documented in TI's Electrical Characteristics table (Section 7.5). The "16" in the part number explicitly denotes the 1.6 V variant within the TPS3840-Q1 family.
Does TPS3840PL16DBVRQ1 require an external pull-up resistor on the RESET pin?
No, TPS3840PL16DBVRQ1 does not require an external pull-up resistor because it features a push-pull active-low output architecture. The RESET pin actively drives low during assertion and high during deassertion, eliminating reliance on external components for logic-level translation or current sourcing - a key differentiator from open-drain variants like TPS3840DL16DBVRQ1.
How is reset delay time programmed on TPS3840PL16DBVRQ1?
Reset delay time (tD) on TPS3840PL16DBVRQ1 is programmed by connecting an external capacitor between the CT pin (Pin 5) and GND. With no capacitor, tD = 50 µs; with a 10 µF capacitor, tD ≈ 6.2 s. The relationship follows tD = –ln(0.29) × RCT × CCT_EXT + 50 µs, where RCT = 500 kΩ typical. Floating CT yields minimum delay.
Is TPS3840PL16DBVRQ1 qualified for automotive use and what standards does it meet?
Yes, TPS3840PL16DBVRQ1 is AEC-Q100 qualified for automotive applications. It meets Grade 1 temperature requirements (–40°C to +125°C ambient), HBM ESD classification Level 2 (±2 kV), and CDM ESD classification Level C7B (±750 V). These qualifications are verified per JEDEC standards and documented in the official TPS3840-Q1 production datasheet (SNVSBA1B).
What is the maximum operating voltage and supply current of TPS3840PL16DBVRQ1?
TPS3840PL16DBVRQ1 operates from 1.5 V to 10 V supply voltage (VDD), with maximum supply current (IDD) of 700 nA across temperature and voltage range. At 25°C and VDD = 3.3 V, typical IDD is 350 nA - enabling continuous monitoring in always-on automotive subsystems without impacting battery drain.
TPS3840PL16DBVRQ1 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:
- 1.6V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 619ms Typical
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3840PL16DBVRQ1 FAQ
1.How can I place an order for TPS3840PL16DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3840PL16DBVRQ1 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 TPS3840PL16DBVRQ1 reliable?
The price and inventory of TPS3840PL16DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3840PL16DBVRQ1 is usually 5 days.
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4.How is shipping managed for TPS3840PL16DBVRQ1?
TPS3840PL16DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3840PL16DBVRQ1 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 TPS3840PL16DBVRQ1?
For technical support, including TPS3840PL16DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3840PL16DBVRQ1 requirements.
6.How does Aetrix verify that TPS3840PL16DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3840PL16DBVRQ1 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 TPS3840PL16DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3840PL16DBVRQ1?
All TPS3840PL16DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3840PL16DBVRQ1, 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 TPS3840PL16DBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3840PL16DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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