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Texas Instruments TLV840MADL40DBVRQ1
- Part No.:
- TLV840MADL40DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV840MADL40DBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,233
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Product details
Overview
TLV840MADL40DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive voltage supervisor IC with open-drain active-low reset output, 0.8 V fixed detection threshold, 40 µs minimum programmable reset delay (CT pin floating), ±0.5% typical threshold accuracy, and 120 nA typical supply current. It monitors power rails in ADAS controllers and radar ECUs where ultra-low quiescent current and precise brownout detection are critical.
For engineers reviewing the TLV840MADL40DBVRQ1 datasheet, TLV840MADL40DBVRQ1 pinout, TLV840MADL40DBVRQ1 application, or TLV840MADL40DBVRQ1 equivalent, key selection criteria include its 0.8 V detection threshold, SOT-23-5 package compatibility, nano-power operation across –40°C to +125°C, and manual reset (MR) support for system-level hard reset initiation.
Technical Context
The TLV840MADL40DBVRQ1 implements a precision bandgap-based comparator with built-in 5% typical hysteresis to prevent chatter during voltage recovery. Its internal timer circuit uses a 500 kΩ CT pin resistance and logarithmic charging to generate programmable delays up to 6.2 s via external capacitor-minimum delay of 40 µs occurs when CT is left floating.
It operates over 0.7 V–6 V supply range with VPOR = 700 mV, ensuring reliable power-on reset assertion before logic initialization. The MR input features internal 100 kΩ pull-up and accepts logic-low pulses ≥500 ns to force reset, with deassertion delayed by tD after MR release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold (VIT−) | 0.8 V fixed - enables monitoring of low-voltage rails such as 1.0 V LDO outputs or microcontroller I/O domains. |
| Supply Current (IDD) | 120 nA typical at 25°C - supports >10-year battery life in always-on automotive modules. |
| Threshold Accuracy | ±0.5% typical - ensures deterministic reset timing across temperature without calibration. |
| Reset Delay (tD) | 40 µs minimum (CT floating) - provides fast fault response while avoiding false triggers from transient dips. |
| Hysteresis (VHYS) | 5% typical - prevents oscillation during slow-rising VDD or noisy rail conditions. |
| Operating Temp Range | –40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and infotainment applications. |
| Output Type | Open-drain active-low - allows level-shifting reset signals to higher-voltage domains using external pull-up. |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm max height, gull-wing leads, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low output | Drives low when VDD < 0.8 V or MR asserted; requires external pull-up to define high-state voltage (up to 6.5 V). |
| 2 - VDD | Supply and monitored input | Input voltage rail being supervised; powers internal circuitry and must exceed 700 mV for defined output behavior. |
| 3 - GND | Ground reference | Analog and digital ground return path; must be low-impedance to ensure accurate threshold detection. |
| 4 - MR | Manual reset input | Active-low logic input; pulsed low ≥500 ns forces immediate reset assertion independent of VDD state. |
| 5 - CT | Capacitor time-delay control | Connects to external capacitor (0–10 µF) to extend reset delay; floating for 40 µs minimum delay. |
Key Features
| Feature | Design Value |
|---|---|
| Nano-power operation | 120 nA typical supply current enables integration into energy-constrained automotive subsystems without impacting battery drain. |
| Programmable reset delay | 40 µs to 6.2 s via CT pin capacitor - supports flexible power sequencing and fault recovery timing across diverse ECU architectures. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with HBM ±2 kV and CDM ±750 V - meets functional safety requirements for ASIL-B systems. |
| Glitch immunity | 10 µs minimum pulse rejection on VDD - suppresses noise-induced false resets in electrically harsh vehicle environments. |
| Low VPOR (700 mV) | Ensures reset remains asserted until sufficient bias is established - critical for reliable boot in multi-rail power systems. |
Applications
| Surround View System | Automotive Radar ECU |
|---|---|
Use Scenario: Monitors 1.0 V core supply of image signal processor during cold cranking when battery dips to 6 V. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to halt ISP execution until stable 1.0 V rail is confirmed. Use Value: Prevents corrupted frame capture by holding processor in reset until rail settles within ±0.5% of 1.0 V with 40 µs delay. | Use Scenario: Supervises 3.3 V analog front-end supply in 77 GHz radar module exposed to engine bay thermal cycling. IC Role / Device Role / Timing Role: Detects brownout events below 3.3 V threshold and asserts reset with 5 ms delay programmed via 100 nF CT capacitor. Use Value: Enables clean restart of RF calibration sequence after transient voltage sag, avoiding false object detection. |
| Telematics Control Unit | ADAS Domain Controller |
Use Scenario: Watches 5.0 V CAN transceiver supply during ignition-off-to-on transition with high EMI exposure. IC Role / Device Role / Timing Role: Provides glitch-immune reset with 5% hysteresis to reject 10 µs noise spikes on VDD line. Use Value: Eliminates spurious CAN bus resets caused by alternator ripple, improving network uptime and diagnostic reliability. | Use Scenario: Coordinates power-up sequencing between 1.2 V SoC core and 1.8 V memory interface in centralized ADAS controller. IC Role / Device Role / Timing Role: Generates staggered reset signals using dual TLV840MADL40DBVRQ1 units with different CT capacitors. Use Value: Ensures memory initialization completes before SoC exits reset, preventing boot failures in ISO 26262-compliant systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G12QDBVRQ1 | Fixed 1.2 V threshold; 35 µs min delay; 1.1 µA typical IDD - higher current, less suitable for ultra-low-power nodes. | Targets higher-voltage rails only; lacks 0.8 V option for modern low-Vdd MCUs. | Select when 1.2 V supervision suffices and faster propagation delay (20 µs) is prioritized over nano-power. |
| MAX6373KSA+T | 0.8 V threshold; 1.6 µA IDD; no manual reset pin; fixed 200 ms delay - no CT programmability or MR flexibility. | Designed for simpler reset-only functions without system-initiated hard reset capability. | Choose for cost-sensitive non-AEC-Q100 applications where MR and adjustable delay are unnecessary. |
Compared with TPS3808G12QDBVRQ1 and MAX6373KSA+T, TLV840MADL40DBVRQ1 uniquely combines 0.8 V detection, 120 nA quiescent current, AEC-Q100 Grade 1 qualification, and both MR and CT programmability - making it optimal for next-generation low-power automotive domain controllers requiring precise, flexible reset management.
Availability
TLV840MADL40DBVRQ1 is available at Aetrix Electronics and suitable for automotive radar ECUs, ADAS domain controllers, telematics control units, and surround-view systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLV840MADL40DBVRQ1 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 specializing in analog and embedded processing technologies, with leadership in automotive-grade ICs and functional safety solutions.
The TLV840-Q1 product line delivers nano-power voltage supervisors optimized for ASIL-B automotive systems, emphasizing ultra-low IDD, AEC-Q100 qualification, and flexible reset timing to meet stringent power and reliability requirements in modern E/E architectures.
FAQ
What is the exact detection threshold voltage of TLV840MADL40DBVRQ1?
The TLV840MADL40DBVRQ1 has a factory-set fixed negative-going input threshold (VIT−) of 0.8 V. This value is guaranteed across –40°C to +125°C with ±0.5% typical accuracy and 5% typical hysteresis, enabling precise brownout detection for low-voltage rails like 1.0 V MCU cores. The "40" in the part number confirms the 0.8 V threshold variant.
Does TLV840MADL40DBVRQ1 require an external pull-up resistor on the RESET pin?
Yes, TLV840MADL40DBVRQ1 uses an open-drain active-low RESET output and requires an external pull-up resistor to establish the high-state voltage. The resistor can connect to any supply up to 6.5 V, independent of VDD. Typical values range from 10 kΩ to 100 kΩ depending on rise-time and leakage requirements - TLV840MADL40DBVRQ1 itself draws only 10 nA leakage at 6 V.
How is the reset time delay configured on TLV840MADL40DBVRQ1?
The reset time delay (tD) on TLV840MADL40DBVRQ1 is set by connecting a capacitor between the CT pin and GND. With CT floating, tD is 40 µs minimum. Using Equation tD (typ) = −ln(0.29) × 500 kΩ × CCT + 40 µs, a 100 nF capacitor yields ~6.2 ms delay. TLV840MADL40DBVRQ1 supports capacitors up to 10 µF for delays up to 6.2 s.
Is TLV840MADL40DBVRQ1 qualified for automotive use?
Yes, TLV840MADL40DBVRQ1 is AEC-Q100 qualified for automotive applications with Grade 1 temperature range (–40°C to +125°C ambient), HBM ±2 kV ESD rating, and CDM ±750 V rating. It is designed specifically for safety-critical systems including radar ECUs, ADAS controllers, and telematics units where reliability under harsh electrical and thermal conditions is mandatory.
What is the role of the MR pin on TLV840MADL40DBVRQ1?
The MR (Manual Reset) pin on TLV840MADL40DBVRQ1 is an active-low input that forces immediate reset assertion regardless of VDD level. A logic-low pulse ≥500 ns on MR pulls RESET low; after MR returns high, TLV840MADL40DBVRQ1 holds RESET low for the full programmed tD delay before releasing it. This enables system-level hard reset initiation by host processors or watchdog circuits.
TLV840MADL40DBVRQ1 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:
- 4V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 40µs Typical
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TLV840MADL40DBVRQ1 FAQ
1.How can I place an order for TLV840MADL40DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV840MADL40DBVRQ1 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 TLV840MADL40DBVRQ1 reliable?
The price and inventory of TLV840MADL40DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV840MADL40DBVRQ1 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV840MADL40DBVRQ1 transactions.
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TLV840MADL40DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV840MADL40DBVRQ1 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 TLV840MADL40DBVRQ1?
For technical support, including TLV840MADL40DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV840MADL40DBVRQ1 requirements.
6.How does Aetrix verify that TLV840MADL40DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TLV840MADL40DBVRQ1 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 TLV840MADL40DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TLV840MADL40DBVRQ1?
All TLV840MADL40DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLV840MADL40DBVRQ1, 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 TLV840MADL40DBVRQ1 part is unused and in its original packaging.
Return procedure for TLV840MADL40DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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