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Texas Instruments TPS3840DL44DBVRQ1
- Part No.:
- TPS3840DL44DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3840DL44DBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:536
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Product details
Overview
TPS3840DL44DBVRQ1 from Texas Instruments is an automotive-grade nano-IQ voltage supervisor with open-drain active-low RESET output, 4.4 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 subsystems.
For engineers reviewing the TPS3840DL44DBVRQ1 datasheet, TPS3840DL44DBVRQ1 pinout, TPS3840DL44DBVRQ1 application, or TPS3840DL44DBVRQ1 equivalent, this page delivers verified functional specifications, validated SOT-23 (DBV) package mapping, confirmed 5-pin terminal roles, and two rigorously cross-referenced alternative parts for automotive voltage monitoring designs requiring AEC-Q100 Grade 1 compliance.
Technical Context
The TPS3840DL44DBVRQ1 implements a precision bandgap-based comparator with built-in hysteresis (200 mV typical for VIT− = 4.4 V), glitch-immune VDD sensing (10 µs immunity at 5% overdrive), and a dedicated CT pin enabling RC-based reset timing control. Its internal state machine ensures RESET remains asserted until both VDD exceeds VIT+ (VIT− + VHYS) and tD expires after MR release.
It features a low-leakage open-drain RESET output (90 nA max at 5.5 V), internal MR pull-up (100 kΩ), and CT pin internal resistance (500 kΩ typical) - all optimized for battery-sensitive automotive modules where supply voltage slew rates ≤100 mV/µs and ambient operation up to +125°C are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT− Threshold | 4.4 V ±1.5% (max) - enables precise brownout detection for 5 V rail monitoring with margin against ripple-induced false resets |
| IDD Quiescent Current | 350 nA typical - supports >10-year battery life in always-on automotive modules without compromising supervision reliability |
| tSTRT Startup Delay | 350 µs max - ensures stable power-up sequencing before system initialization begins |
| tD Reset Delay Range | 50 µs (CT floating) to 6.2 s (10 µF on CT) - allows flexible reset hold time tuning for diverse MCU boot requirements |
| VHYS Hysteresis | 200 mV typical - prevents oscillatory RESET toggling during slow-rising/falling VDD transitions near threshold |
| tP_HL Propagation Delay | 30 µs max - guarantees fast fault response to supply collapse, critical for safety-critical domain controllers |
| Operating Temp | −40°C to +125°C (Grade 1) - qualified per AEC-Q100 for under-hood and cockpit electronics |
Pinout & Package
Package: 5-pin SOT-23 (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 to assert reset; requires external pull-up; sinks 2 mA max; leakage <90 nA when high-impedance |
| 2 - VDD | Supply input & monitored rail | Input voltage range 1.5–10 V; powers internal circuitry and serves as reference for threshold detection |
| 3 - GND | Analog/digital ground reference | Common return path for VDD, MR, CT, and RESET; must be low-impedance for noise immunity |
| 4 - MR | Active-low manual reset input | Pull ≤600 mV to assert reset; internally pulled up to VDD (100 kΩ); floating = disabled |
| 5 - CT | Capacitor time-delay programming node | Connect external capacitor (0–10 µF) to GND to set tD; floating = minimum 50 µs delay |
Key Features
| Feature | Design Value |
|---|---|
| Nano-IQ operation | 350 nA typical supply current enables integration into always-on domains without measurable battery drain |
| Factory-trimmed VIT− | 4.4 V threshold with ±1.5% max error eliminates need for external resistor divider calibration |
| Programmable tD via CT pin | Single external capacitor replaces discrete RC networks, reducing BOM count and layout area |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation, meeting automotive ESD (HBM ±2 kV, CDM ±750 V) and reliability standards |
| Glitch-immune VDD sensing | Rejects transients <10 µs duration at 5% overdrive, preventing spurious resets in noisy vehicle electrical systems |
Applications
| Automotive Head Unit Power Sequencing | ADAS Camera Module Supervision |
|---|---|
Use Scenario: Monitors 5 V supply rail powering DSP, display controller, and audio codec in head unit during ignition cycle and sleep/wake transitions. IC Role / Device Role / Timing Role: Voltage supervisor asserting open-drain RESET to hold processors in reset until VDD stabilizes above 4.4 V and tD expires. Use Value: Prevents firmware corruption by ensuring all subsystems power up synchronously with verified rail integrity and sufficient hold time. | Use Scenario: Ensures clean startup and fault recovery of 3.3 V imaging sensor and ISP in driver-monitoring camera exposed to engine vibration and load-dump events. IC Role / Device Role / Timing Role: Detects brownout on VCORE rail and asserts RESET to halt image capture until supply recovers and hysteresis window is cleared. Use Value: Eliminates corrupted frame buffers and sensor lockup by enforcing strict voltage validity before enabling high-speed MIPI interfaces. |
| Telematics Control Unit (TCU) Watchdog Enable | Automotive Cluster Microcontroller Reset |
Use Scenario: Provides primary power-good signal to enable watchdog timer and cellular modem power management IC in LTE-connected TCU operating across wide temperature ranges. IC Role / Device Role / Timing Role: Generates delayed, debounced RESET pulse upon VDD ramp-up, synchronized with MCU boot ROM execution timing. Use Value: Guarantees modem firmware loads only after stable 3.3 V rail is confirmed, avoiding failed SIM authentication or network registration. | Use Scenario: Supervises 1.8 V core rail of cluster MCU during stop-start cycling and battery voltage sag below 10 V. IC Role / Device Role / Timing Role: Asserts RESET when VDD drops below 4.4 V (scaled via external resistor divider), then holds for programmable tD post-recovery. Use Value: Maintains deterministic reset behavior despite varying battery conditions, preventing display artifacts or gauge pointer drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3840PL44DBVRQ1 | Push-pull active-low RESET output; no external pull-up required; higher VOL (200 mV @ 2 mA) | Better suited for driving heavy capacitive loads directly; incompatible with wired-OR reset bus topologies | Select when board-level RESET net has no pull-up or drives multiple downstream devices without level-shifting |
| MAX6374DS44+T | 4.4 V threshold, 1.5 µA IDD, fixed 200 ms tD, SO-8 package, non-automotive grade | Lacks AEC-Q100 qualification and programmable delay; higher quiescent current limits battery use | Consider only for non-automotive industrial prototypes where cost and footprint are secondary to rapid evaluation |
Compared with TPS3840PL44DBVRQ1, the TPS3840DL44DBVRQ1 offers lower system-level power consumption and compatibility with shared reset buses, while MAX6374DS44+T trades automotive qualification and nano-IQ for simpler fixed-delay implementation in non-safety-critical contexts.
Availability
TPS3840DL44DBVRQ1 is available at Aetrix Electronics and suitable for automotive head units, ADAS camera modules, and telematics control units requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for TPS3840DL44DBVRQ1 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 monitoring applications demanding ultra-low quiescent current, high threshold accuracy, and robust transient immunity across extended temperature ranges.
FAQ
What is the exact VIT− threshold voltage of the TPS3840DL44DBVRQ1?
The TPS3840DL44DBVRQ1 has a factory-set negative-going input threshold voltage (VIT−) of 4.4 V, with guaranteed accuracy of ±1.5% over the full −40°C to +125°C operating temperature range. This value is laser-trimmed during production and does not require external resistor configuration. The corresponding hysteresis (VHYS) is 200 mV typical, yielding a VIT+ of 4.6 V.
Does the TPS3840DL44DBVRQ1 require an external pull-up resistor on the RESET pin?
Yes, the TPS3840DL44DBVRQ1 features an open-drain RESET output and requires an external pull-up resistor to VDD or another logic rail. Typical values range from 10 kΩ to 100 kΩ depending on rise time and bus loading requirements. The device itself provides no internal pull-up on RESET - unlike push-pull variants such as the TPS3840PL44DBVRQ1.
Can the reset delay time (tD) of the TPS3840DL44DBVRQ1 be adjusted without adding a capacitor?
Yes - leaving the CT pin unconnected (floating) configures the TPS3840DL44DBVRQ1 for its minimum reset delay of 50 µs. This fixed short delay is included within the startup delay (tSTRT) and requires no external components. Adding a capacitor between CT and GND extends tD up to 6.2 s, but floating CT is fully functional for fast-reset applications.
Is the TPS3840DL44DBVRQ1 qualified for automotive use?
Yes, the TPS3840DL44DBVRQ1 is AEC-Q100 qualified for automotive applications, specifically Grade 1 (−40°C to +125°C ambient). It meets HBM ESD classification Level 2 (±2 kV) and CDM Level C7B (±750 V), and is manufactured in TI's certified automotive production flow with full PPAP documentation and lot traceability.
What is the maximum supply voltage the TPS3840DL44DBVRQ1 can monitor?
The TPS3840DL44DBVRQ1 supports an input supply voltage (VDD) range of 1.5 V to 10 V. While its internal threshold is fixed at 4.4 V, it can monitor rails up to 10 V directly. For rails exceeding 10 V (e.g., 12 V battery), an external resistor divider must be used to scale the monitored voltage down to within the 1.5–10 V input range - with appropriate consideration for divider current and noise sensitivity.
TPS3840DL44DBVRQ1 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:
- 4.4V
- 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
TPS3840DL44DBVRQ1 FAQ
1.How can I place an order for TPS3840DL44DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3840DL44DBVRQ1 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 TPS3840DL44DBVRQ1 reliable?
The price and inventory of TPS3840DL44DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3840DL44DBVRQ1 is usually 5 days.
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Once your TPS3840DL44DBVRQ1 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 TPS3840DL44DBVRQ1?
For technical support, including TPS3840DL44DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3840DL44DBVRQ1 requirements.
6.How does Aetrix verify that TPS3840DL44DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3840DL44DBVRQ1 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 TPS3840DL44DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3840DL44DBVRQ1?
All TPS3840DL44DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3840DL44DBVRQ1, 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 TPS3840DL44DBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3840DL44DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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