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Texas Instruments TPS3840DL16DBVRQ1
- Part No.:
- TPS3840DL16DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3840DL16DBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:18,676
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Product details
Overview
TPS3840DL16DBVRQ1 from Texas Instruments is an automotive-grade nano-power voltage supervisor IC with open-drain active-low RESET output, 1.6 V fixed threshold (±1.5% max), 350 nA typical quiescent current, and programmable reset delay up to 6.2 s via external capacitor on CT pin. It monitors VDD in automotive infotainment power rails (e.g., 1.8 V VCORE, 3.3 V VI/O) and asserts reset during brownout or manual reset events.
For engineers reviewing the TPS3840DL16DBVRQ1 datasheet, TPS3840DL16DBVRQ1 pinout, TPS3840DL16DBVRQ1 application, or TPS3840DL16DBVRQ1 equivalent, this page delivers verified functional specifications, validated SOT-23-5 pin mapping, confirmed AEC-Q100 Grade 1 qualification, and two technically documented alternative parts for automotive system design and BOM optimization.
Technical Context
The TPS3840DL16DBVRQ1 implements a precision bandgap-referenced comparator with built-in hysteresis (100 mV typ. for 1.6 V threshold) and glitch-immune detection logic. Its internal state machine enforces a minimum 50 µs reset assertion time and supports user-defined delay via RC timing at the CT pin, where RCT = 500 kΩ (typ.) sets tD = –ln(0.29) × RCT × CCT + 50 µs.
It operates across 1.5 V–10 V supply range with VPOR = 950 mV (min.), supports MR-driven reset initiation with 300 ns pulse width immunity, and delivers 30 µs typical propagation delay (tP_HL) from VDD drop below VIT– to RESET assertion - critical for deterministic microcontroller boot sequencing in safety-critical automotive domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT– Threshold | 1.6 V ±1.5% max - ensures reliable reset assertion at 1.8 V core rail under worst-case temp/voltage drift |
| IDD Quiescent Current | 350 nA typ., 700 nA max - enables >10-year battery life in always-on automotive modules |
| tD Reset Delay Range | 50 µs (CT open) to 6.2 s (10 µF) - supports flexible power-up sequencing across multi-rail SoCs |
| tP_HL Propagation Delay | 30 µs typ. - guarantees fast fault response before MCU executes first instruction |
| Hysteresis (VHYS) | 100 mV typ. - prevents chatter during slow-rising VDD or noisy supply conditions |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C ambient) - qualified for engine bay and cockpit electronics |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration and level-shifting with external pull-up |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low output | Drives low during fault; requires external pull-up to host rail (e.g., 3.3 V); sinks ≥2 mA at VOL ≤200 mV |
| 2 - VDD | Supply input & monitored rail | Input voltage range 1.5 V–10 V; powers internal circuitry and serves as monitored supply |
| 3 - GND | Analog/digital ground reference | Must be connected directly to system ground plane; separates noise-sensitive analog blocks from digital paths |
| 4 - MR | Active-low manual reset input | Pull ≤600 mV to assert reset; internal 100 kΩ pull-up allows floating when unused; immune to <300 ns glitches |
| 5 - CT | Capacitor-based delay timing node | Connect 0–10 µF to GND to set tD; floating = 50 µs min. delay; internal 500 kΩ resistor sets RC time constant |
Key Features
| Feature | Design Value |
|---|---|
| Nano-IDD operation | 350 nA typical supply current enables use in always-on vehicle networks without draining 12 V battery |
| Programmable tD via CT pin | Single external capacitor replaces discrete RC networks - reduces BOM count and layout area by >40% |
| 1% typical VIT– accuracy | Minimizes margining overhead in 1.8 V/3.3 V rail monitoring - eliminates need for post-production calibration |
| Glitch-immune MR input | Rejects transients <300 ns wide - prevents spurious resets from ESD or switching noise in high-EMI cabins |
| VPOR = 950 mV | Ensures defined output state during power ramp-up - avoids metastability in MCU reset controller interface |
Applications
| Automotive Head Unit Power Sequencing | ADAS Camera Module Supervision |
|---|---|
Use Scenario: Monitors 1.8 V VCORE and 3.3 V VI/O rails in infotainment head units during cold crank and load dump events. IC Role / Device Role / Timing Role: Voltage supervisor asserting open-drain RESET to SoC upon VDD dip below 1.6 V; delays release by 200 ms via 100 nF CT capacitor. Use Value: Prevents firmware corruption during unstable battery conditions; eliminates need for discrete RC timer and comparator. |
Use Scenario: Ensures clean boot of image signal processor (ISP) in rear-view camera modules exposed to thermal cycling. IC Role / Device Role / Timing Role: Resets ISP when 2.8 V analog supply falls below 1.6 V threshold; uses MR pin for factory test mode entry. Use Value: Guarantees deterministic startup after thermal stress; 125°C operation meets AEC-Q100 Grade 1 requirements. |
| Telematics Control Unit (TCU) Watchdog | Automotive Cluster Microcontroller Reset |
Use Scenario: Provides primary power-on reset and brownout protection for LTE modem and GNSS SoC in telematics gateways. IC Role / Device Role / Timing Role: Supervises 3.3 V main rail; CT pin left floating for 50 µs fast reset; MR tied to cellular baseband processor for emergency reset. Use Value: Enables sub-100 µs recovery from modem lockup; nano-IDD extends backup battery runtime during ignition-off tracking. |
Use Scenario: Manages reset timing for dual-core MCU in digital instrument clusters with independent 1.2 V and 5 V supplies. IC Role / Device Role / Timing Role: Monitors 1.2 V core rail; asserts RESET until both VDD > 1.6 V + hysteresis and CT delay expires (1.5 s via 1 µF). Use Value: Eliminates race conditions between power rails; hysteresis prevents flicker during 125°C thermal soak testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3840PL16DBVRQ1 | Push-pull active-low RESET output; no external pull-up required; higher IOH/IOL drive capability | Better suited for direct MCU reset pin interface without pull-up resistor; less flexible for level-shifting | Select when board space is constrained and host MCU accepts push-pull drive; avoid if wired-OR reset bus is needed |
| MAX6371LASD+T | Fixed 1.625 V threshold; 1.2 µA IDD; no MR pin; 200 ms factory-fixed delay | Lacks programmable delay and manual reset - limited to simple POR-only use cases | Choose only for cost-sensitive non-AEC-Q100 designs where delay flexibility and MR are unnecessary |
Compared with TPS3840PL16DBVRQ1, the TPS3840DL16DBVRQ1 offers open-drain flexibility for multi-source reset buses and lower system-level leakage; compared with MAX6371LASD+T, it provides AEC-Q100 qualification, 5× lower quiescent current, and field-programmable timing - essential for modern automotive domain controllers.
Availability
TPS3840DL16DBVRQ1 is available at Aetrix Electronics and suitable for automotive head unit, ADAS camera module, and telematics control unit applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for TPS3840DL16DBVRQ1 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 over 50 years of innovation in power management and signal chain solutions.
The TPS3840-Q1 product line was designed specifically for automotive power supervision - delivering ultra-low IQ, high-accuracy threshold detection, and robust ESD/glitch immunity in harsh vehicle environments.
FAQ
What is the exact threshold voltage and accuracy of the TPS3840DL16DBVRQ1?
The TPS3840DL16DBVRQ1 has a fixed negative-going input threshold (VIT–) of 1.6 V with ±1.5% maximum deviation across –40°C to +125°C ambient temperature. Typical accuracy is ±1%, and hysteresis is 100 mV (typical), ensuring stable reset release above 1.7 V under all operating conditions.
How does the CT pin function in the TPS3840DL16DBVRQ1, and what capacitor values are supported?
The CT pin on the TPS3840DL16DBVRQ1 sets reset delay time via an external capacitor to GND. Supported range is 0–10 µF; with no capacitor (pin floating), tD = 50 µs. A 100 nF capacitor yields ~200 ms delay, and 10 µF gives up to 6.2 s. Internal RCT = 500 kΩ (typ.) defines the RC time constant.
Is the TPS3840DL16DBVRQ1 qualified for automotive applications, and what AEC-Q100 grade does it meet?
Yes, the TPS3840DL16DBVRQ1 is AEC-Q100 qualified for automotive use. It meets Grade 1 requirements: ambient operating temperature from –40°C to +125°C, HBM ESD rating of ±2000 V, and CDM ESD rating of ±750 V - validated per TI's production data sheet SNVSBA1B.
What is the quiescent current specification for the TPS3840DL16DBVRQ1, and how does it vary with temperature?
The TPS3840DL16DBVRQ1 draws 350 nA typical and 700 nA maximum quiescent current (IDD) across its full operating range (–40°C to +125°C). Data sheet Figure 7 confirms <600 nA at 125°C and 3.3 V VDD, enabling >10-year battery life in always-on automotive modules.
Can the TPS3840DL16DBVRQ1 be used with a 1.2 V supply rail?
No - the TPS3840DL16DBVRQ1 requires VDD ≥1.5 V per its absolute maximum ratings and recommended operating conditions. For 1.2 V rail supervision, TI recommends the TPS3808G12QDBVRQ1 (1.2 V threshold variant), as the 1.6 V threshold of TPS3840DL16DBVRQ1 cannot reliably monitor below 1.5 V.
TPS3840DL16DBVRQ1 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:
- Open Drain or Open Collector
- 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
TPS3840DL16DBVRQ1 FAQ
1.How can I place an order for TPS3840DL16DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3840DL16DBVRQ1 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 TPS3840DL16DBVRQ1 reliable?
The price and inventory of TPS3840DL16DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3840DL16DBVRQ1 is usually 5 days.
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TPS3840DL16DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3840DL16DBVRQ1 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 TPS3840DL16DBVRQ1?
For technical support, including TPS3840DL16DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3840DL16DBVRQ1 requirements.
6.How does Aetrix verify that TPS3840DL16DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3840DL16DBVRQ1 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 TPS3840DL16DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3840DL16DBVRQ1?
All TPS3840DL16DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3840DL16DBVRQ1, 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 TPS3840DL16DBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3840DL16DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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