My Inquiry
My Account
Texas Instruments TPS3840DL25DBVRQ1
- Part No.:
- TPS3840DL25DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3840DL25DBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:8,213
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS3840DL25DBVRQ1 from Texas Instruments is an automotive-grade nano-power voltage supervisor IC with open-drain active-low reset output, 2.5 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 TPS3840DL25DBVRQ1 datasheet, TPS3840DL25DBVRQ1 pinout, TPS3840DL25DBVRQ1 application, or TPS3840DL25DBVRQ1 equivalent, this page delivers verified specifications, validated SOT-23-5 pin functions, automotive AEC-Q100 Grade 1 qualification context, and real-world timing behavior including tSTRT ≤ 350 µs and tP_HL ≤ 30 µs.
Technical Context
The TPS3840DL25DBVRQ1 implements a precision bandgap-referenced comparator with built-in hysteresis (100 mV typ. for 2.5 V threshold) and glitch-immune VDD monitoring logic. Its CT pin enables RC-based reset delay programming without external logic, while MR provides asynchronous manual reset assertion independent of VDD state.
It operates across 1.5 V to 10 V supply range with VPOR = 950 mV (open-drain variant), supports fast VDD slew rates (≤100 mV/µs), and maintains sub-μA IDD over –40°C to +125°C ambient - enabling direct integration into low-power always-on domains of automotive ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT− Threshold | 2.5 V ±1.5% max - ensures accurate brownout detection at core rail level with minimal margin loss |
| IDD Quiescent Current | 350 nA typ., 700 nA max - enables multi-year battery backup operation in telematics modules |
| tSTRT Startup Delay | ≤350 µs - guarantees rapid system initialization after cold start without firmware intervention |
| tP_HL Propagation Delay | ≤30 µs - provides tight timing control for MCU reset synchronization during transient events |
| Hysteresis (VHYS) | 100 mV typ. - prevents chatter on noisy 2.5 V rails during marginal voltage recovery |
| tD Reset Delay Range | 50 µs (CT floating) to 6.2 s (10 µF) - allows flexible reset hold time tuning per SoC requirements |
| VPOR Power-On Reset | 950 mV - asserts reset until VDD stabilizes above safe logic threshold for 2.5 V I/O domains |
Pinout & Package
Package: 5-pin SOT-23 (DBV), body size 2.90 mm × 1.60 mm, JEDEC MO-178AC 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 at VOL ≤ 200 mV |
| 2 - VDD | Supply and monitored input | Input voltage source and monitored rail; supports 1.5–10 V operation with internal regulator |
| 3 - GND | Analog/digital ground reference | Common return path for internal comparator, bandgap, and output stage |
| 4 - MR | Active-low manual reset input | Pull ≤600 mV to assert reset; internal 100 kΩ pull-up; glitch-immune with 300 ns minimum pulse |
| 5 - CT | Capacitor time-delay programming | Connect external capacitor to GND to set tD; floating = min 50 µs delay; RCT = 500 kΩ typ. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in automotive powertrain and cockpit systems |
| Programmable reset delay | Adjustable from 50 µs to 6.2 s using single external capacitor - eliminates need for external timers or microcontroller polling |
| 1% typical threshold accuracy | Reduces design margin overhead vs. legacy supervisors; enables tighter VDD tolerance allocation in 2.5 V domains |
| 350 nA nano-quiescent current | Enables direct connection to always-on battery rails without compromising ECU sleep current budgets |
| Glitch immunity on VDD | Rejects transients <10 µs wide at 5% overdrive - prevents false resets during load dump or ignition switching |
Applications
| Automotive Head Unit Power Sequencing | ADAS Domain Controller Brownout Protection |
|---|---|
Use Scenario: Monitors 2.5 V VCORE rail in infotainment head unit during cold cranking and stop-start cycles. IC Role / Device Role / Timing Role: Voltage supervisor asserting open-drain RESET to SoC when VDD drops below 2.5 V −1.5%, with 100 mV hysteresis and 200 ms programmable hold time. Use Value: Prevents corrupted boot sequences by holding reset until stable 2.5 V rail is re-established post-cranking dip. | Use Scenario: Guards 2.5 V I/O supply in radar ECU exposed to engine bay thermal and electrical noise. IC Role / Device Role / Timing Role: Detects brownout on 2.5 V rail with ≤30 µs propagation delay and deasserts reset only after full hysteresis recovery + 500 ms CT delay. Use Value: Eliminates spurious resets during alternator ripple or load dump events while ensuring deterministic recovery timing. |
| Telematics Emergency Call (eCall) Backup Power Monitor | Automotive Display Cluster Supply Supervision |
Use Scenario: Supervises supercapacitor-backed 2.5 V rail powering eCall module during main battery disconnect. IC Role / Device Role / Timing Role: Nano-IDD supervisor maintaining reset assertion until VDD rises above 2.5 V +100 mV, with VPOR = 950 mV guaranteeing clean POR. Use Value: Extends functional uptime by >10× vs. conventional supervisors, enabling longer emergency transmission windows. | Use Scenario: Ensures reliable startup of TFT display controller powered by 2.5 V LDO in digital instrument cluster. IC Role / Device Role / Timing Role: Generates precise reset pulse synchronized to 2.5 V rail ramp with 350 µs startup delay and no external components. Use Value: Removes need for discrete RC network and reduces BOM count while improving reset timing repeatability across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3840PL25DBVRQ1 | Push-pull active-low output; no external pull-up required; higher VOL (200 mV @ 2 mA) | Better suited for high-noise environments where pull-up resistor adds susceptibility | Select when board layout lacks space for pull-up or when driving heavy capacitive loads directly |
| MAX6375XR25+T | Fixed 2.5 V threshold, 1.6 µA IDD, SOT-23-5, but no MR or CT pins | Limited to basic POR; no manual reset or programmable delay capability | Choose only if system requires minimal feature set and can tolerate 4.5× higher quiescent current |
Compared with TPS3840PL25DBVRQ1, the TPS3840DL25DBVRQ1 offers lower system-level leakage via configurable pull-up voltage and better noise isolation; compared with MAX6375XR25+T, it delivers 4.6× lower IDD and full reset timing flexibility - critical for modern automotive low-power domains.
Availability
TPS3840DL25DBVRQ1 is available at Aetrix Electronics and suitable for automotive head units, ADAS domain controllers, and telematics emergency call systems requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for TPS3840DL25DBVRQ1 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 company delivering analog and embedded processing solutions for automotive, industrial, personal electronics, and communications markets.
The TPS3840-Q1 product line was designed specifically for automotive power-supply monitoring - combining ultra-low quiescent current, AEC-Q100 Grade 1 qualification, and programmable timing to replace legacy discrete reset circuits in next-generation ECUs.
FAQ
What is the exact threshold voltage and accuracy of the TPS3840DL25DBVRQ1?
The TPS3840DL25DBVRQ1 has a factory-set negative-going input threshold (VIT−) of 2.5 V with ±1.5% maximum accuracy over –40°C to +125°C ambient temperature. Typical accuracy is ±1%, and hysteresis is 100 mV (typical) - confirmed in Section 7.5 of the SNVSBA1B datasheet. This ensures robust brownout detection for 2.5 V rails without calibration.
Does the TPS3840DL25DBVRQ1 require an external pull-up resistor on the RESET pin?
Yes, the TPS3840DL25DBVRQ1 features an open-drain active-low RESET output and requires an external pull-up resistor to VDD or another logic rail. Typical value is 100 kΩ; the device specifies ILKG(OD) ≤ 90 nA at 5.5 V, enabling high-value pull-ups to minimize current draw while maintaining fast rise time.
How is the reset delay time programmed on the TPS3840DL25DBVRQ1?
The reset delay (tD) 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_EXT + 50 µs, where RCT = 500 kΩ (typical), per Section 8.3.2 of the datasheet.
Is the TPS3840DL25DBVRQ1 qualified for automotive applications?
Yes, the TPS3840DL25DBVRQ1 is AEC-Q100 qualified for automotive applications, with Device Temperature Grade 1 (–40°C to +125°C ambient), HBM ESD Level 2 (±2000 V), and CDM ESD Level C7B (±750 V). This qualification is explicitly stated in the "Features" section of the SNVSBA1B datasheet.
What is the power-on reset (VPOR) voltage specification for the TPS3840DL25DBVRQ1?
The TPS3840DL25DBVRQ1 has a power-on reset (VPOR) voltage of 950 mV, defined as the minimum VDD level at which the RESET output is guaranteed to be released (high-impedance) when VDD rises from zero. This ensures reliable release only after sufficient voltage is present for downstream 2.5 V logic, per Electrical Characteristics Table 7.5.
TPS3840DL25DBVRQ1 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:
- 2.5V
- 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
TPS3840DL25DBVRQ1 FAQ
1.How can I place an order for TPS3840DL25DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3840DL25DBVRQ1 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 TPS3840DL25DBVRQ1 reliable?
The price and inventory of TPS3840DL25DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3840DL25DBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS3840DL25DBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3840DL25DBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3840DL25DBVRQ1?
TPS3840DL25DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3840DL25DBVRQ1 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 TPS3840DL25DBVRQ1?
For technical support, including TPS3840DL25DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3840DL25DBVRQ1 requirements.
6.How does Aetrix verify that TPS3840DL25DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3840DL25DBVRQ1 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 TPS3840DL25DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3840DL25DBVRQ1?
All TPS3840DL25DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3840DL25DBVRQ1, 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 TPS3840DL25DBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3840DL25DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS3840DL25DBVRQ1 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…
