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Texas Instruments TLV840MADL22DBVRQ1
- Part No.:
- TLV840MADL22DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV840MADL22DBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,238
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Product details
Overview
TLV840MADL22DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive voltage supervisor IC with open-drain active-low reset output, 2.2 V fixed detection threshold (VIT−), 120 nA typical supply current, ±0.5% typical threshold accuracy, and user-programmable reset time delay via CT pin. 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 TLV840MADL22DBVRQ1 datasheet, TLV840MADL22DBVRQ1 pinout, TLV840MADL22DBVRQ1 application, or TLV840MADL22DBVRQ1 equivalent, key selection criteria include its 2.2 V factory-set 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 TLV840MADL22DBVRQ1 implements a precision bandgap-based comparator with built-in 5% typical hysteresis (VHYS) to prevent false resets during supply transients. Its internal timer circuit enables programmable reset assertion hold time (tD) from 40 µs (CT pin floating) up to ~6.2 s (with 10 µF capacitor), synchronized to VDD recovery above VIT− + VHYS.
It features glitch immunity on VDD (10 µs minimum pulse rejection at 5% overdrive), low-power-on-reset voltage (VPOR = 700 mV), and a dedicated manual reset input (MR) with 1 µs propagation delay to reset assertion. The open-drain RESET output requires an external pull-up and supports rail-to-rail voltage translation up to 6.5 V independent of VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT− Threshold | 2.2 V fixed - factory-trimmed detection point for reliable 2.2 V rail monitoring without external resistors |
| Supply Current (IDD) | 120 nA typical at 25°C - enables >10-year battery life in always-on automotive modules |
| Threshold Accuracy | ±0.5% typical - ensures consistent reset behavior across temperature and unit-to-unit variation |
| Hysteresis (VHYS) | 5% typical - prevents chatter during slow-rising/falling VDD transitions near trip point |
| Min Reset Delay (tD) | 40 µs typical with CT pin floating - provides fast, deterministic reset release after undervoltage recovery |
| Operating Temp Range | −40°C to +125°C ambient - meets AEC-Q100 Grade 1 requirements for under-hood automotive use |
| Output Type | Open-drain active-low - allows flexible pull-up to any voltage ≤6.5 V, enabling mixed-voltage system interfacing |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, surface-mount, RoHS-compliant, thermal resistance RθJA = 193.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low output | Drives logic low when VDD < VIT− or MR is asserted; requires external pull-up resistor for high state |
| 2 - VDD | Power supply input | Monitored voltage rail (0.7–6 V); powers internal circuitry and sets VPOR = 700 mV |
| 3 - GND | Ground reference | Analog and digital ground return path; must be low-impedance for accurate threshold sensing |
| 4 - MR | Manual reset input | Active-low control: logic low ≥500 ns forces immediate reset assertion regardless of VDD level |
| 5 - CT | Capacitor time-delay input | Connects to external capacitor (0–10 µF) to set tD; left floating for minimum 40 µs delay |
Key Features
| Feature | Design Value |
|---|---|
| Nano-power operation | 120 nA typical IDD enables integration into energy-constrained automotive subsystems without compromising battery runtime |
| Factory-trimmed 2.2 V threshold | Eliminates external resistor divider, reducing BOM count and layout area while guaranteeing ±0.5% accuracy |
| Programmable reset delay | CT pin supports 40 µs to 6.2 s tD range - accommodates diverse power-up sequencing and fault-clearing timing needs |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation, HBM ±2 kV, CDM ±750 V - suitable for safety-critical ADAS and gateway applications |
| Glitch-immune VDD sensing | Rejects transients as short as 10 µs at 5% overdrive - prevents spurious resets in electrically noisy vehicle environments |
Applications
| Surround View System | Radar ECU |
|---|---|
Use Scenario: Monitors 2.2 V camera sensor bias rail during cold cranking when battery dips to 6–9 V. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to FPGA until stable 2.2 V rail is confirmed. Use Value: Prevents image corruption by holding camera logic in reset until power settles, leveraging 120 nA IDD to avoid draining backup capacitors. |
Use Scenario: Ensures clean startup of 2.2 V RF front-end supply after ignition cycle. IC Role / Device Role / Timing Role: Detects undervoltage on 2.2 V LDO output and holds MCU in reset for programmable 100 ms via 15 nF CT capacitor. Use Value: Guarantees radar transceiver initializes only after stable analog supply, using ±0.5% VIT− accuracy to avoid premature release. |
| Automotive Gateway | ADAS Controller |
Use Scenario: Supervises 2.2 V CAN transceiver supply in multi-protocol gateway with shared power domain. IC Role / Device Role / Timing Role: Open-drain RESET pulled up to 3.3 V logic rail, asserting low on VDD drop to protect CAN bus integrity. Use Value: Enables rail-agnostic reset signaling - 2.2 V monitored rail triggers 3.3 V logic reset without level shifters. |
Use Scenario: Provides fail-safe reset for vision processor core voltage during EMI-induced supply droop. IC Role / Device Role / Timing Role: MR pin tied to watchdog timer output to force hard reset if software hangs, with 1 µs response latency. Use Value: Adds hardware-enforced recovery path independent of processor state, meeting ASIL-B functional safety timing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV840MAPL22DBVRQ1 | Push-pull active-low output; no external pull-up required; higher VOL (0.8×VDD) vs open-drain VOL (300 mV max) | Better suited for single-rail systems where RESET must drive logic directly without pull-up resistor | Select when board space is constrained and 3.3 V/5 V logic levels match VDD; avoid if interfacing mixed-voltage domains |
| TPS3808G12QDBVRQ1 | Fixed 1.2 V threshold; 800 nA IDD; 200 ms min tD (non-programmable); SOT-23-6 package | Limited to lower-voltage rails; lacks CT pin flexibility and MR pin; higher quiescent current reduces battery lifetime | Choose only if 1.2 V detection is required and programmable delay is unnecessary; verify pin compatibility (6-pin vs 5-pin) |
Compared with TLV840MAPL22DBVRQ1, TLV840MADL22DBVRQ1 offers voltage-translating reset capability but requires a pull-up; compared with TPS3808G12QDBVRQ1, it delivers 7× lower IDD, adjustable tD, and MR functionality - making it superior for 2.2 V rail supervision in power-sensitive ADAS nodes.
Availability
TLV840MADL22DBVRQ1 is available at Aetrix Electronics and suitable for automotive radar ECUs, surround-view camera modules, and ADAS domain controllers requiring stable component supply with AEC-Q100 compliance and long-term lifecycle assurance.
Supply support for TLV840MADL22DBVRQ1 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 conditioning ICs.
The TLV840-Q1 product line was designed specifically for ultra-low-power voltage monitoring in automotive electronics, targeting ADAS, infotainment, and body control modules where nanoscale current consumption and AEC-Q100 reliability are mandatory.
FAQ
What is the exact fixed threshold voltage of the TLV840MADL22DBVRQ1?
The TLV840MADL22DBVRQ1 has a factory-trimmed negative-going input threshold voltage (VIT−) of exactly 2.2 V, with ±0.5% typical accuracy across −40°C to +125°C. This value is laser-trimmed during production and does not require external resistor networks - ensuring repeatable brownout detection for 2.2 V rails in automotive gateways and radar ECUs.
How does the CT pin affect reset timing in the TLV840MADL22DBVRQ1?
The CT pin on the TLV840MADL22DBVRQ1 sets the reset time delay (tD) by connecting an external capacitor to GND. With CT floating, tD is 40 µs typical; with a 10 nF capacitor, tD becomes 6.2 ms; with 1 µF, it reaches 619 ms. The relationship follows tD ≈ −ln(0.29) × 500 kΩ × CCT + 40 µs, enabling precise power-up sequencing in ADAS controllers.
Can the TLV840MADL22DBVRQ1 monitor a 2.2 V rail while driving a 3.3 V logic reset line?
Yes. The TLV840MADL22DBVRQ1's open-drain RESET output can be pulled up to 3.3 V (or any voltage ≤6.5 V) independently of its 2.2 V monitored VDD rail. This rail-to-rail voltage translation eliminates level shifters in mixed-voltage automotive systems - a key design advantage over push-pull supervisors like TLV840MAPL22DBVRQ1.
What is the minimum pulse width required on the MR pin to assert reset in the TLV840MADL22DBVRQ1?
The TLV840MADL22DBVRQ1 requires a minimum MR pin pulse width of 500 ns to reliably assert the RESET output. This specification is guaranteed across −40°C to +125°C and ensures robust manual reset triggering from microcontroller GPIOs or watchdog circuits without false negatives due to short glitches.
Is the TLV840MADL22DBVRQ1 qualified for automotive safety applications?
Yes. The TLV840MADL22DBVRQ1 is AEC-Q100 qualified for Grade 1 (−40°C to +125°C ambient), with HBM ESD rating ±2 kV and CDM rating ±750 V. While not ISO 26262-certified as a standalone safety element, its predictable reset behavior, glitch immunity, and parametric stability make it suitable for ASIL-B decomposition in ADAS controller power monitoring subsystems.
TLV840MADL22DBVRQ1 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:
- 2.2V
- 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
TLV840MADL22DBVRQ1 FAQ
1.How can I place an order for TLV840MADL22DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV840MADL22DBVRQ1 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 TLV840MADL22DBVRQ1 reliable?
The price and inventory of TLV840MADL22DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV840MADL22DBVRQ1 is usually 5 days.
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Once your TLV840MADL22DBVRQ1 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 TLV840MADL22DBVRQ1?
For technical support, including TLV840MADL22DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV840MADL22DBVRQ1 requirements.
6.How does Aetrix verify that TLV840MADL22DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TLV840MADL22DBVRQ1 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 TLV840MADL22DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TLV840MADL22DBVRQ1?
All TLV840MADL22DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLV840MADL22DBVRQ1, 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 TLV840MADL22DBVRQ1 part is unused and in its original packaging.
Return procedure for TLV840MADL22DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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