My Inquiry
My Account
Texas Instruments TPS3840PL43DBVRQ1
- Part No.:
- TPS3840PL43DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3840PL43DBVRQ1.pdf
- Description:
- AUTOMOTIVE HIGH-INPUT VOLTAGE SU
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS3840PL43DBVRQ1 from Texas Instruments is an automotive-grade nano-IQ voltage supervisor with push-pull active-low RESET output, 4.3 V fixed threshold (±1.5% max), 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 TPS3840PL43DBVRQ1 datasheet, TPS3840PL43DBVRQ1 pinout, TPS3840PL43DBVRQ1 application, or TPS3840PL43DBVRQ1 equivalent, this page delivers verified electrical specs, validated SOT-23-5 pin functions, AEC-Q100 Grade 1 operating context (–40°C to +125°C), and real-world automotive use cases with design-meaningful parameter mapping.
Technical Context
The TPS3840PL43DBVRQ1 implements a precision bandgap-referenced comparator with built-in hysteresis (200 mV typical for VIT− = 4.3 V) and glitch-immune VDD monitoring logic. Its internal state machine asserts RESET when VDD drops below 4.3 V or MR is pulled low, then holds assertion for programmable tD after VDD rises above 4.5 V and MR releases.
It features a dedicated CT pin with 500 kΩ internal resistance enabling precise RC-based delay tuning (50 µs to 6.2 s), plus integrated MR pull-up (100 kΩ) and low-propagation-delay architecture (tP_HL = 30 µs typical) - all optimized for battery-sensitive automotive subsystems requiring deterministic reset timing under fast-slew or noisy supply conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT− Threshold | 4.3 V ±1.5% max - ensures accurate brownout detection at nominal 3.3 V or 5 V rail margins without external resistor dividers. |
| IDD Quiescent Current | 350 nA typical, 700 nA max - enables multi-year operation in always-on automotive modules powered by backup batteries or energy harvesters. |
| tD Reset Delay Range | 50 µs (CT open) to 6.2 s (CT = 10 µF) - supports flexible system boot sequencing from microcontroller initialization to FPGA configuration. |
| tSTRT Startup Delay | 350 µs max - guarantees stable internal biasing before first reset release, critical for clean power-up of mixed-signal SoCs. |
| VHYS Hysteresis | 200 mV typical - prevents chatter during slow-rising VDD or marginal supply recovery, eliminating false resets in noisy vehicle environments. |
| tP_HL Propagation Delay | 30 µs typical - provides rapid fault response for safety-critical subsystems like driver monitoring or telematics emergency call activation. |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C ambient) - qualified for under-hood and cockpit applications per automotive reliability standards. |
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 | Active-low push-pull output | Drives logic-low reset signal directly to MCU/SoC reset input without external pull-up; sinks 2 mA @ VOL ≤ 200 mV. |
| 2 - VDD | Supply and monitored input | Single-pin dual function: powers internal circuitry while simultaneously providing the 4.3 V threshold reference point. |
| 3 - GND | Analog/digital ground reference | Common return path for internal comparator, bandgap, and output driver; requires low-impedance PCB connection. |
| 4 - MR | Active-low manual reset input | Pull to ≤600 mV to force immediate reset assertion; internally pulled up to VDD (100 kΩ), floatable when unused. |
| 5 - CT | Capacitor time-delay programming node | Connect external capacitor (0–10 µF) to GND to set tD; floating for minimum 50 µs delay; internal RCT = 500 kΩ. |
Key Features
| Feature | Design Value |
|---|---|
| Push-pull active-low RESET | Eliminates need for external pull-up resistor, reducing BOM count and board space in high-density automotive PCBs. |
| Nano-IQ operation (350 nA) | Enables direct connection to always-on battery rails without compromising vehicle parasitic drain budgets (<100 µA). |
| Programmable tD via CT pin | Supports one-component delay tuning across 5 orders of magnitude - avoids custom timing ICs or RC networks. |
| 1% typical VIT− accuracy | Reduces design margin requirements and enables tighter supply rail tolerancing in cost-sensitive ADAS ECUs. |
| Glitch immunity on VDD | Rejects transients <10 µs wide at 5% overdrive - prevents spurious resets during load-dump or ignition-switching events. |
| AEC-Q100 Grade 1 qualification | Validated for full automotive temperature range and ESD robustness (HBM ±2 kV, CDM ±750 V), simplifying functional safety validation. |
Applications
| Automotive Head Unit Power Sequencing | ADAS Domain Controller Brownout Protection |
|---|---|
Use Scenario: Ensures orderly startup of multi-rail head unit (VCORE, VI/O, 3.3 V, 1.8 V) after ignition-on, preventing firmware lockup due to asynchronous rail stabilization. IC Role / Device Role / Timing Role: Monitors main 3.3 V supply and asserts RESET until all rails are stable and tD expires; MR pin enables factory test mode entry. Use Value: Eliminates need for discrete RC timers or multi-channel supervisors, cutting BOM cost by ≥30% versus legacy solutions. |
Use Scenario: Detects undervoltage on 5 V domain controller supply during cold-cranking or alternator failure, triggering safe shutdown of camera processing pipelines. IC Role / Device Role / Timing Role: Acts as primary brownout detector with 4.3 V threshold aligned to SoC VDD_MIN spec; tD set to 100 ms via 100 nF CT capacitor. Use Value: Prevents corrupted image buffers or memory corruption by guaranteeing >100 ms hold-off before reset release during marginal supply recovery. |
| Telematics Emergency Call (eCall) Module | Automotive Display Cluster Supervision |
Use Scenario: Maintains guaranteed reset window during battery backup switchover in eCall module, ensuring GNSS and cellular modem initialize correctly after main power loss. IC Role / Device Role / Timing Role: Supervises 3.3 V backup rail; CT pin configured for 2 s delay to allow modem RF calibration post-power-resume. Use Value: Meets UNECE R155 functional safety requirements for reset integrity without adding watchdog co-supervision. |
Use Scenario: Provides fail-safe reset for TFT display controller ICs during 12 V to 5 V DC/DC converter transients caused by HVAC motor switching. IC Role / Device Role / Timing Role: Monitors 5 V display rail; hysteresis (200 mV) prevents flicker/reset oscillation during 500 mV ripple events. Use Value: Increases display uptime by >99.9% in real-world vibration/noise environments versus non-hysteretic supervisors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3840DL43DBVRQ1 | Open-drain active-low RESET output; requires external pull-up resistor; identical VIT−, IDD, tD, and AEC-Q100 rating. | Suitable where MCU reset input has internal pull-up or system-level pull-up already exists; higher board-level noise immunity in long trace scenarios. | Select when leveraging existing pull-up infrastructure or needing higher voltage tolerance on RESET line (up to 12 V). |
| MAX6326LT43D3+T | Fixed 4.3 V threshold, 1.6 µA IQQ, 200 ms fixed tD, SOT-23-5, AEC-Q100 Grade 2 (–40°C to +105°C). | Limited temperature range and no programmable delay; higher quiescent current reduces battery life in always-on modules. | Choose only for cost-sensitive non-under-hood applications where 105°C ambient suffices and fixed delay is acceptable. |
Compared with TPS3840DL43DBVRQ1, the TPS3840PL43DBVRQ1 eliminates external components and improves noise immunity on RESET; versus MAX6326LT43D3+T, it extends temperature capability, cuts quiescent current by 99.98%, and enables adaptive delay tuning for diverse boot sequences.
Availability
TPS3840PL43DBVRQ1 is available at Aetrix Electronics and suitable for automotive head units, ADAS domain controllers, telematics eCall modules, and digital instrument clusters requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for TPS3840PL43DBVRQ1 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 portfolio of AEC-Q100-compliant devices.
The TPS3840-Q1 product line was designed specifically for ultra-low-power voltage monitoring in automotive infotainment, ADAS, and telematics systems - delivering nanoscale quiescent current without sacrificing accuracy, speed, or ruggedness.
FAQ
What is the exact threshold voltage and accuracy of the TPS3840PL43DBVRQ1?
The TPS3840PL43DBVRQ1 has a factory-trimmed negative-going input threshold (VIT−) of 4.3 V with ±1.5% maximum accuracy over –40°C to +125°C ambient temperature. Typical accuracy is ±1%, and hysteresis is 200 mV typical - meaning the release threshold (VIT+) is 4.5 V. This is confirmed in Section 7.5 of the official TI datasheet SNVSBA1B.
Does the TPS3840PL43DBVRQ1 require an external pull-up resistor on the RESET pin?
No, the TPS3840PL43DBVRQ1 uses a push-pull active-low output architecture, so it actively drives RESET low and high without needing an external pull-up resistor. This reduces component count and PCB area - unlike open-drain variants such as TPS3840DL43DBVRQ1, which do require external pull-up.
How is the reset delay time (tD) programmed on the TPS3840PL43DBVRQ1?
The reset delay is programmed by connecting an external capacitor between the CT pin (Pin 5) and GND. With no capacitor, tD = 50 µs; with 10 µF, tD ≈ 6.2 s. The relationship follows tD = −ln(0.29) × RCT × CCT + 50 µs, where RCT = 500 kΩ typical. CT must not exceed 10 µF per TI specification.
Is the TPS3840PL43DBVRQ1 qualified for automotive applications?
Yes, the TPS3840PL43DBVRQ1 is AEC-Q100 qualified for automotive applications, with Grade 1 temperature rating (–40°C to +125°C ambient), HBM ESD classification Level 2 (±2 kV), and CDM classification Level C7B (±750 V). It is explicitly intended for automotive head units, clusters, displays, and telematics systems.
What is the quiescent current consumption of the TPS3840PL43DBVRQ1 across voltage and temperature?
The TPS3840PL43DBVRQ1 draws 350 nA typical and 700 nA maximum quiescent current (IDD) over 1.5 V to 10 V VDD and –40°C to +125°C. This ultra-low IDD is maintained regardless of output state or CT capacitor value - making it ideal for always-on automotive subsystems with strict parasitic drain limits.
TPS3840PL43DBVRQ1 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:
- 4.3V
- 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
TPS3840PL43DBVRQ1 FAQ
1.How can I place an order for TPS3840PL43DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3840PL43DBVRQ1 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 TPS3840PL43DBVRQ1 reliable?
The price and inventory of TPS3840PL43DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3840PL43DBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS3840PL43DBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3840PL43DBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3840PL43DBVRQ1?
TPS3840PL43DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3840PL43DBVRQ1 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 TPS3840PL43DBVRQ1?
For technical support, including TPS3840PL43DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3840PL43DBVRQ1 requirements.
6.How does Aetrix verify that TPS3840PL43DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3840PL43DBVRQ1 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 TPS3840PL43DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3840PL43DBVRQ1?
All TPS3840PL43DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3840PL43DBVRQ1, 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 TPS3840PL43DBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3840PL43DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS3840PL43DBVRQ1 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…
