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Texas Instruments TLV840MAPL36DBVRQ1
- Part No.:
- TLV840MAPL36DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV840MAPL36DBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,975
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Product details
Overview
TLV840MAPL36DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive voltage supervisor IC with push-pull active-low reset output, 3.6 V fixed threshold (±0.5% typical accuracy), 120 nA typical supply current, and programmable reset time delay via CT pin. It monitors power rails in ADAS controllers and radar ECUs where ultra-low quiescent current and precise voltage detection are critical.
For engineers reviewing the TLV840MAPL36DBVRQ1 datasheet, TLV840MAPL36DBVRQ1 pinout, TLV840MAPL36DBVRQ1 application, or TLV840MAPL36DBVRQ1 equivalent, this page delivers verified technical context, exact pin functions, automotive-grade timing behavior, and validated alternative options for system-level reset design.
Technical Context
The TLV840MAPL36DBVRQ1 implements a precision bandgap-based comparator with built-in 5% typical hysteresis to prevent false resets during VDD transients. Its internal timer circuit uses the CT pin's RC network-driven by a 500 kΩ internal resistance-to generate reset delays ranging from 40 µs (CT floating) to 619 ms (1 µF capacitor).
It operates across 0.7 V–6 V input range and asserts RESET low when VDD drops below 3.6 V (VIT−), holding the signal low for tD after VDD rises above 3.78 V (VIT− + VHYS). Manual reset (MR) provides synchronous hard-reset capability with 1 µs propagation delay and 500 ns minimum pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT− Threshold | 3.6 V ±0.5% (typ) - ensures accurate power-rail monitoring at nominal 3.3 V or 3.6 V systems without external resistor dividers |
| Supply Current | 120 nA (typ) at 25°C - enables multi-year battery life in always-on automotive modules like telematics control units |
| Reset Propagation Delay | 30 µs (typ) - guarantees fast fault response for safety-critical ADAS subsystems requiring sub-100 µs detection |
| Programmable tD Range | 40 µs (CT open) to 619 ms (CT = 1 µF) - supports flexible power-up sequencing and brownout recovery timing |
| Operating Temp | –40°C to +125°C ambient - meets AEC-Q100 Grade 1 requirements for under-hood and infotainment applications |
| Output Type | Push-pull active-low - eliminates need for external pull-up resistor, simplifying PCB layout and reducing BOM count |
| Hysteresis | 5% (typ) - prevents oscillation during slow-rising/falling VDD transitions common in LDO-powered domains |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low push-pull output | Drives logic low during reset; returns high after tD expires - no external pull-up required, compatible with 1.8 V/3.3 V/5 V logic interfaces |
| 2: VDD | Input supply and monitored rail | Supplies internal circuitry while being monitored - accepts 0.7 V–6 V, enabling direct connection to battery, LDO, or DC/DC outputs |
| 3: GND | Reference ground | Common return path for internal comparator, timer, and output driver - must be low-impedance to ensure glitch immunity |
| 4: MR | Active-low manual reset input | Pulls RESET low when asserted; deasserts after tD upon release - supports processor-initiated recovery without power cycle |
| 5: CT | Capacitor time-delay programming node | Connects to external capacitor (0–10 µF) to set tD; floating for minimum 40 µs delay - internal 500 kΩ resistor defines RC time constant |
Key Features
| Feature | Design Value |
|---|---|
| Nano-power operation | 120 nA typical IDD enables integration into always-on domains (e.g., emergency call wake-up circuits) without compromising battery runtime |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient, HBM ±2 kV, CDM ±750 V - suitable for front camera, gateway, and radar ECU deployments |
| Programmable reset delay | Wide tD range (40 µs–6.2 s) via single external capacitor - replaces discrete RC networks and reduces component count in power sequencing designs |
| Built-in 5% hysteresis | Eliminates need for external hysteresis resistors - ensures stable reset assertion/deassertion during noisy or slowly ramping supply conditions |
| Glitch-immune VDD sensing | 10 µs minimum pulse rejection at 5% overdrive - suppresses false triggers from EMI, load-switch transients, or switching regulator noise |
Applications
| Surround View System | Automotive Gateway |
|---|---|
Use Scenario: Monitors dual power rails (e.g., 12 V camera input and 3.3 V image processor core) in multi-camera fusion modules. IC Role / Device Role / Timing Role: Voltage supervisor providing synchronized reset assertion across sensor and SoC domains during cold crank or battery dip. Use Value: Prevents partial initialization and firmware lockup by enforcing strict power-up sequencing with programmable tD between rail stabilization and processor boot. |
Use Scenario: Ensures reliable startup of CAN/FlexRay communication stacks after ignition-on in vehicle central gateway modules. IC Role / Device Role / Timing Role: Reset generator with manual reset input (MR) enabling software-triggered bus reinitialization without microcontroller reboot. Use Value: Reduces diagnostic trouble code (DTC) false positives by eliminating spurious resets during transient bus voltage fluctuations. |
| Radar ECU | ADAS Controller |
Use Scenario: Supervises 5 V analog front-end and 1.2 V digital core supplies in 77 GHz radar processing units. IC Role / Device Role / Timing Role: High-accuracy (±0.5%) voltage detector asserting reset when VDD falls below 3.6 V, with 30 µs propagation delay. Use Value: Meets ASIL-B timing constraints by guaranteeing deterministic fault response within 100 µs of undervoltage event. |
Use Scenario: Provides fail-safe reset for domain controller SoCs managing lane-keeping assist (LKA) and automatic emergency braking (AEB). IC Role / Device Role / Timing Role: Automotive-grade supervisor with VPOR = 700 mV ensuring defined output state during power ramp-up from deep sleep. Use Value: Eliminates undefined boot states that could compromise functional safety integrity during cold start or wake-from-sleep sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV840MAPL33DBVRQ1 | Fixed 3.3 V threshold (vs. 3.6 V); identical pinout, timing, and quiescent current | Optimized for 3.3 V LDO-supplied domains; requires redesign if system rail is 3.6 V or higher | Select when monitoring standard 3.3 V logic rails - no change to CT/MR interface or PCB layout |
| TPS3808G33QDBVRQ1 | Higher 1.2 µA quiescent current; fixed 3.3 V threshold; 200 ms min tD (no CT pin) | Lacks programmable delay and nano-power capability - suited for non-battery-critical gateways but not radar ECUs | Choose only if tD flexibility and sub-µA operation are unnecessary; verify thermal derating at 125°C due to higher IDD |
Compared with TLV840MAPL36DBVRQ1, TLV840MAPL33DBVRQ1 offers identical functionality at 3.3 V threshold with zero layout impact, while TPS3808G33QDBVRQ1 trades programmability and ultra-low power for higher drive strength and simpler timing-but cannot replace TLV840MAPL36DBVRQ1 in battery-sensitive or precisely timed applications.
Availability
TLV840MAPL36DBVRQ1 is available at Aetrix Electronics and suitable for automotive radar ECU, surround view camera systems, and ADAS domain controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLV840MAPL36DBVRQ1 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 power management and signal chain solutions.
The TLV840-Q1 product line delivers nano-power, AEC-Q100 qualified voltage supervisors for automotive safety-critical subsystems including ADAS, infotainment, and vehicle networking - designed to replace discrete reset circuits with integrated, high-accuracy alternatives.
FAQ
What is the exact threshold voltage of TLV840MAPL36DBVRQ1?
The TLV840MAPL36DBVRQ1 has a factory-set negative-going input threshold (VIT−) of 3.6 V with ±0.5% typical accuracy across –40°C to +125°C. This value is fixed and non-adjustable - no external resistor divider is needed. The device asserts RESET low when VDD falls below this threshold and holds it low until VDD rises above 3.78 V (3.6 V + 5% hysteresis) and the programmed reset delay (tD) expires.
Does TLV840MAPL36DBVRQ1 require an external pull-up resistor on the RESET pin?
No, TLV840MAPL36DBVRQ1 does not require an external pull-up resistor because it features a push-pull active-low output. The RESET pin actively drives low during reset and high during normal operation. This eliminates BOM cost and layout complexity associated with open-drain variants like TLV840MADL36DBVRQ1, and ensures robust logic-level compatibility with 1.8 V, 3.3 V, or 5 V microcontrollers.
How is the reset time delay (tD) programmed on TLV840MAPL36DBVRQ1?
The reset time delay (tD) on TLV840MAPL36DBVRQ1 is programmed by connecting an external capacitor between the CT pin (Pin 5) and GND. With CT floating, tD is 40 µs (typ). Using a 1 µF capacitor yields ~619 ms (typ). The relationship follows tD ≈ −ln(0.29) × 500 kΩ × CCT + 40 µs. Capacitors up to 10 µF are supported, but larger values require longer fault durations to fully discharge before next reset.
What is the minimum pulse width required on the MR pin to assert reset in TLV840MAPL36DBVRQ1?
The TLV840MAPL36DBVRQ1 requires a minimum MR pulse width of 500 ns to reliably assert RESET. This specification is guaranteed across –40°C to +125°C and all valid VDD levels (0.7 V–6 V). The MR pin has an internal pull-up resistor (100 kΩ typical) and accepts logic-low signals down to 0.3×VDD. Pulse widths shorter than 500 ns may result in incomplete reset assertion, especially at temperature extremes.
Is TLV840MAPL36DBVRQ1 qualified for automotive use?
Yes, TLV840MAPL36DBVRQ1 is AEC-Q100 qualified for automotive applications. It meets Grade 1 requirements: operating ambient temperature from –40°C to +125°C, HBM ESD classification level 2 (±2 kV), and CDM ESD classification level C7B (±750 V). It is packaged in an SOT-23-5 (DBV) housing with full traceability and PPAP documentation support for Tier 1 automotive production.
TLV840MAPL36DBVRQ1 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:
- 3.6V
- Output:
- Push-Pull, Totem Pole
- 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
TLV840MAPL36DBVRQ1 FAQ
1.How can I place an order for TLV840MAPL36DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV840MAPL36DBVRQ1 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 TLV840MAPL36DBVRQ1 reliable?
The price and inventory of TLV840MAPL36DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV840MAPL36DBVRQ1 is usually 5 days.
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TLV840MAPL36DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV840MAPL36DBVRQ1 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 TLV840MAPL36DBVRQ1?
For technical support, including TLV840MAPL36DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV840MAPL36DBVRQ1 requirements.
6.How does Aetrix verify that TLV840MAPL36DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TLV840MAPL36DBVRQ1 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 TLV840MAPL36DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TLV840MAPL36DBVRQ1?
All TLV840MAPL36DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLV840MAPL36DBVRQ1, 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 TLV840MAPL36DBVRQ1 part is unused and in its original packaging.
Return procedure for TLV840MAPL36DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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