My Inquiry
My Account
Texas Instruments TPS3840DL30DBVRQ1
- Part No.:
- TPS3840DL30DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3840DL30DBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:19,324
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS3840DL30DBVRQ1 from Texas Instruments is an automotive-grade nano-power voltage supervisor IC with open-drain active-low RESET output, 3.0 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 battery-powered automotive systems such as telematics control units where ultra-low power and precise brownout detection are critical.
For engineers reviewing the TPS3840DL30DBVRQ1 datasheet, TPS3840DL30DBVRQ1 pinout, TPS3840DL30DBVRQ1 application, or TPS3840DL30DBVRQ1 equivalent, this device delivers AEC-Q100 Grade 1 qualification (–40°C to +125°C), 30 µs typical propagation delay, built-in glitch immunity on VDD and MR inputs, and SOT-23-5 (DBV) package compatibility for space-constrained PCB layouts.
Technical Context
The TPS3840DL30DBVRQ1 implements a precision bandgap-based comparator with internal hysteresis (100 mV typical for 3.0 V threshold) to prevent chatter during slow-rising/falling VDD transitions. Its reset assertion logic combines VDD undervoltage detection (VIT− = 3.0 V) and manual reset (MR) input, both triggering active-low RESET after startup delay (tSTRT ≤ 350 µs) plus user-programmable tD.
It features a dedicated CT pin with 500 kΩ internal resistance enabling RC-based delay tuning, and supports fast release via floating CT (50 µs fixed delay). The open-drain output requires external pull-up and provides <90 nA leakage at 5.5 V, making it suitable for mixed-voltage domains and level-shifting interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT− Threshold | 3.0 V ±1.5% max - ensures reliable reset assertion at precisely defined supply rail collapse point for 3.3 V or 2.8 V system domains. |
| IDD Quiescent Current | 350 nA typical, 700 nA max - enables multi-year operation in always-on automotive modules without compromising battery life. |
| tSTRT Startup Delay | ≤350 µs - guarantees rapid system readiness after cold boot while accommodating slow-ramping supplies. |
| tP_HL Propagation Delay | 30 µs typical - provides fast response to VDD dips, minimizing risk of MCU lockup during transient faults. |
| tD Reset Delay Range | 50 µs (CT open) to 6.2 s (10 µF on CT) - allows flexible timing alignment with processor POR requirements or firmware initialization sequences. |
| VHYS Hysteresis | 100 mV typical - prevents false deassertion during noisy or slowly recovering VDD conditions near threshold. |
| Output Type | Open-drain active-low - supports wired-OR reset buses, mixed-voltage pull-ups (e.g., 1.8 V/3.3 V/5 V), and I²C-compatible sharing. |
Pinout & Package
Package: 5-pin SOT-23 (DBV), body size 2.90 mm × 1.60 mm, JEDEC MO-178AC compliant, surface-mount compatible with standard reflow profiles.
| 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 at VDD < VIT−; leakage <90 nA when high-impedance. |
| 2: VDD | Supply and monitored input | Input voltage range 1.5 V–10 V; powers internal circuitry and serves as reference for threshold detection. |
| 3: GND | Ground reference | Analog and digital ground return; must be low-impedance connection to minimize noise coupling into threshold comparator. |
| 4: MR | Active-low manual reset input | Pull to ≤600 mV to force reset; internally pulled up to VDD (~100 kΩ); immune to <300 ns glitches. |
| 5: CT | Capacitor time-delay programming | Connect external capacitor (0–10 µF) to GND to set tD; floating for minimum 50 µs delay; internal RCT = 500 kΩ typical. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, meeting automotive reliability and ESD (HBM ±2 kV, CDM ±750 V) requirements. |
| Programmable reset delay via CT pin | Enables precise synchronization with SoC boot sequence using a single external capacitor-no firmware or external timer needed. |
| 1% typical VIT− accuracy | Reduces design margin overhead; eliminates need for external trimming resistors in production calibration. |
| Built-in VDD and MR glitch immunity | Rejects transients ≤10 µs (5% overdrive), preventing spurious resets in electrically noisy vehicle environments. |
| Ultra-low IDD across full temperature range | Maintains sub-µA consumption even at 125°C, critical for always-on domain supervision in ADAS and infotainment systems. |
Applications
| Automotive Telematics Control Unit (TCU) | ADAS Domain Controller Power Sequencing |
|---|---|
Use Scenario: Monitors 3.3 V VCORE rail in LTE/V2X communication module during ignition cycling and sleep/wake transitions. IC Role / Device Role / Timing Role: Voltage supervisor asserting open-drain RESET to baseband processor upon VDD drop below 3.0 V, with 200 ms delay set by 100 nF CT capacitor. Use Value: Prevents corrupted firmware execution during brownout by holding processor in reset until stable 3.3 V is restored and validated. |
Use Scenario: Coordinates power-up sequencing between radar SoC and companion safety microcontroller in autonomous driving stack. IC Role / Device Role / Timing Role: Generates delayed, glitch-immune reset pulse after main 5 V supply stabilizes, ensuring deterministic core initialization order. Use Value: Eliminates race conditions between voltage rails and avoids undefined state in ASIL-B critical subsystems. |
| Automotive Digital Instrument Cluster | EV Battery Management System (BMS) Monitor Node |
Use Scenario: Supervises 2.8 V display interface supply in driver-facing LCD cluster exposed to wide thermal and EMI stress. IC Role / Device Role / Timing Role: Detects undervoltage on VI/O rail and asserts RESET to graphics controller with 50 µs fixed delay (CT floating). Use Value: Guarantees clean display initialization without flicker or artifacts during cold cranking events. |
Use Scenario: Provides independent watchdog supervision for isolated analog front-end (AFE) in high-voltage BMS monitor IC. IC Role / Device Role / Timing Role: Monitors isolated 3.3 V auxiliary supply feeding ADC reference and SPI isolator, asserting RESET on failure. Use Value: Adds hardware-level fault containment layer beyond software watchdog, improving functional safety compliance (ISO 26262). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3840PL30DBVRQ1 | Push-pull active-low output instead of open-drain; no external pull-up required; higher output drive (2 mA sink/source). | Suitable where board layout lacks space for pull-up resistor or where faster rise/fall edges are needed on RESET line. | Select when driving short traces directly to MCU RESET pin without level translation; avoid if shared reset bus or mixed-voltage domains exist. |
| MAX6373LASD+T | Fixed 3.08 V threshold, 1.6 µA IDD, no programmable delay, SOT-23-5 package, industrial temp grade only (–40°C to +85°C). | Lacks AEC-Q100 qualification and automotive temperature range; not suitable for under-hood or safety-critical modules. | Consider only for non-automotive, cost-sensitive industrial designs where extended temperature and ultra-low IDD are not required. |
Compared with TPS3840PL30DBVRQ1, the TPS3840DL30DBVRQ1 offers superior flexibility in multi-rail systems via open-drain output, while MAX6373LASD+T trades automotive qualification and nano-power performance for lower unit cost in benign environments.
Availability
TPS3840DL30DBVRQ1 is available at Aetrix Electronics and suitable for automotive head units, telematics control units, and ADAS domain controllers requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for TPS3840DL30DBVRQ1 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 with deep automotive expertise and rigorous quality systems.
The TPS3840-Q1 product line was designed specifically for automotive voltage monitoring in safety-critical, low-power domains-emphasizing AEC-Q100 compliance, nanoscale quiescent current, and robust glitch immunity in harsh EMI environments.
FAQ
What is the exact threshold voltage of the TPS3840DL30DBVRQ1 and how accurate is it over temperature?
The TPS3840DL30DBVRQ1 has a factory-set negative-going input threshold (VIT−) of 3.0 V with ±1.5% maximum deviation across –40°C to +125°C ambient temperature. Typical accuracy is ±1%, verified per TI's production test flow. This tight tolerance eliminates need for external calibration in automotive 3.3 V system monitoring.
Can the TPS3840DL30DBVRQ1 be used without an external capacitor on the CT pin?
Yes-the TPS3840DL30DBVRQ1 operates with CT pin left floating, delivering a fixed 50 µs reset delay. This configuration is ideal for applications requiring minimal external components and fastest possible reset release after VDD recovery, such as real-time safety monitors.
Does the TPS3840DL30DBVRQ1 require an external pull-up resistor on the RESET pin?
Yes-the TPS3840DL30DBVRQ1 features an open-drain active-low RESET output and requires an external pull-up resistor to the appropriate logic rail (e.g., 1.8 V, 3.3 V, or 5 V). Typical values range from 10 kΩ to 100 kΩ depending on rise time and bus loading requirements.
How does the manual reset (MR) function interact with the voltage-monitoring reset in the TPS3840DL30DBVRQ1?
The TPS3840DL30DBVRQ1 asserts RESET whenever either VDD falls below 3.0 V or MR is pulled low (≤600 mV). RESET remains asserted for the full programmed delay (tD) after both VDD rises above 3.1 V (3.0 V + 100 mV hysteresis) and MR returns high (>0.7×VDD). This dual-trigger architecture supports both power-fail and user-initiated reset scenarios.
Is the TPS3840DL30DBVRQ1 qualified for use in ASIL-B or ASIL-C automotive safety applications?
The TPS3840DL30DBVRQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and includes documented failure-in-time (FIT) data, built-in glitch immunity, and hysteresis-making it suitable as a hardware monitor in ASIL-B decomposition paths. However, full ASIL-C compliance requires system-level integration analysis per ISO 26262 Part 5.
TPS3840DL30DBVRQ1 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:
- 3V
- 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
TPS3840DL30DBVRQ1 FAQ
1.How can I place an order for TPS3840DL30DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3840DL30DBVRQ1 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 TPS3840DL30DBVRQ1 reliable?
The price and inventory of TPS3840DL30DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3840DL30DBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS3840DL30DBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3840DL30DBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3840DL30DBVRQ1?
TPS3840DL30DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3840DL30DBVRQ1 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 TPS3840DL30DBVRQ1?
For technical support, including TPS3840DL30DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3840DL30DBVRQ1 requirements.
6.How does Aetrix verify that TPS3840DL30DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3840DL30DBVRQ1 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 TPS3840DL30DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3840DL30DBVRQ1?
All TPS3840DL30DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3840DL30DBVRQ1, 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 TPS3840DL30DBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3840DL30DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS3840DL30DBVRQ1 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
