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Texas Instruments TLV840MAPH29DBVRQ1
- Part No.:
- TLV840MAPH29DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV840MAPH29DBVRQ1.pdf
- Description:
- AUTOMOTIVE LOW-VOLTAGE SUPERVISO
- Quantity:
- Payment:
- Shipping:
Inventory:2,312
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Product details
Overview
TLV840MAPH29DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive voltage supervisor IC with push-pull active-high reset output, 2.9 V fixed detection threshold (VIT−), 120 nA typical supply current, ±0.5% typical threshold accuracy, and programmable reset time delay via external capacitor on CT pin-used for reliable power-on reset and brownout detection in ADAS radar ECUs and automotive head units.
For engineers reviewing the TLV840MAPH29DBVRQ1 datasheet, TLV840MAPH29DBVRQ1 pinout, TLV840MAPH29DBVRQ1 application, or TLV840MAPH29DBVRQ1 equivalent, key selection considerations include its 2.9 V detection threshold, push-pull active-high output topology, SOT-23-5 package compatibility, manual reset (MR) functionality, and 40 µs minimum reset delay without external capacitor.
Technical Context
The TLV840MAPH29DBVRQ1 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 user-programmable reset delay (tD) from 40 µs to >600 ms using a capacitor on the CT pin, while maintaining nanoscale quiescent current across –40°C to +125°C ambient.
It operates over 0.7 V to 6 V input range, asserts RESET high when VDD falls below 2.9 V, and deasserts after VDD rises above 3.045 V (2.9 V + 5% VHYS) and tD expires. The MR pin 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 | 2.9 V fixed; precise brownout detection point for 3.3 V rail monitoring |
| Supply Current | 120 nA typical at 25°C; enables always-on monitoring in battery-critical automotive modules |
| Threshold Accuracy | ±0.5% typical; ensures deterministic reset timing across temperature and voltage |
| Hysteresis | 5% typical (145 mV); prevents chatter during slow-rising/falling VDD transitions |
| Min Reset Delay | 40 µs typical with CT pin floating; supports fast system recovery after brief dips |
| Propagation Delay | 30 µs typical (tP_HL); enables rapid response to supply faults before MCU lockup |
| Operating Temp | –40°C to +125°C ambient; qualified per AEC-Q100 Grade 1 for under-hood use |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm max height, gull-wing leads, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push-pull output | Drives logic high during reset assertion; no external pull-up required; sinks 2 mA min |
| 2 - VDD | Supply input & monitored rail | Input voltage range 0.7–6 V; powers internal circuitry and serves as detection source |
| 3 - GND | Ground reference | Common return path for all internal blocks; must be low-impedance for glitch immunity |
| 4 - MR | Manual reset input | Logic-low pulse ≥500 ns forces immediate reset; internally pulled up to VDD (100 kΩ) |
| 5 - CT | Capacitor time-delay control | Connect external capacitor to GND to set tD; floating = 40 µs min delay; RCT = 500 kΩ typ |
Key Features
| Feature | Design Value |
|---|---|
| Nano-power operation | 120 nA typical IDD enables multi-year battery life in always-on telematics modules |
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C), HBM ±2 kV, CDM ±750 V for safety-critical ECU use |
| Programmable reset delay | tD adjustable from 40 µs to 619 ms via 0–1 µF CT capacitor-no firmware or external logic needed |
| Glitch-immune sensing | 10 µs minimum VDD transient immunity at 5% overdrive prevents false resets from EMI or switching noise |
| Power-on reset stability | VPOR = 900 mV ensures defined output state during cold cranking (6–8 V battery dip) |
Applications
| ADAS Radar ECU | Automotive Head Unit |
|---|---|
Use Scenario: Monitors 3.3 V LDO output powering FPGA and RF front-end in 77 GHz radar module during engine start-stop cycles. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-high RESET to hold FPGA in reset until stable 3.3 V is confirmed and 100 ms delay elapses. Use Value: Prevents partial configuration and metastability by enforcing clean power-up sequencing with 2.9 V threshold aligned to LDO dropout spec. | Use Scenario: Supervises dual 5 V and 1.8 V rails in infotainment head unit with CAN/FlexRay connectivity. IC Role / Device Role / Timing Role: Dual-rail monitoring via separate TLV840MAPH29DBVRQ1 instances; MR pin tied to microcontroller GPIO for safe firmware update reset. Use Value: Enables synchronized system reset without external logic; push-pull output drives 100 pF bus capacitance directly. |
| Surround View Camera System | Telematics Control Unit |
Use Scenario: Ensures reliable boot of image signal processor (ISP) and MIPI CSI-2 serializer after vehicle ignition. IC Role / Device Role / Timing Role: Detects 2.9 V threshold on 3.3 V camera power rail; CT pin configured with 100 nF for 620 µs delay matching ISP initialization time. Use Value: Eliminates need for discrete RC network; ±0.5% accuracy guarantees consistent timing across production units. | Use Scenario: Provides fail-safe reset for LTE modem and GNSS receiver during battery voltage sag in emergency call (eCall) activation. IC Role / Device Role / Timing Role: Monitors 3.8 V backup battery rail; MR pin driven by baseband processor to force modem reset during SIM re-authentication. Use Value: 120 nA quiescent current extends eCall readiness time; AEC-Q100 qualification ensures operation in crash-degraded environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV840MAPH33DBVRQ1 | 3.3 V fixed VIT− threshold; identical package, pinout, and features | Targeted for 3.3 V rail supervision where tighter margin vs. 3.3 V nominal is required | Select when system VDD nominal is 3.3 V and detection must occur before 3.0 V |
| TPS3808G33QDBVRQ1 | 3.3 V threshold, 1.6 µA typical IDD, 200 ms fixed delay, no CT pin or MR | Lacks programmable delay and manual reset; suited for simpler, non-configurable reset needs | Choose only if nano-power and configurability are not required and fixed 200 ms delay suffices |
Compared with TLV840MAPH33DBVRQ1, TLV840MAPH29DBVRQ1 offers earlier fault detection for 3.3 V rails near dropout; versus TPS3808G33QDBVRQ1, it delivers 13× lower supply current and full delay/MR flexibility at the cost of slightly higher design complexity.
Availability
TLV840MAPH29DBVRQ1 is available at Aetrix Electronics and suitable for automotive radar ECUs, surround-view camera systems, telematics control units, and ADAS domain controllers requiring stable component supply with AEC-Q100 compliance and long-term lifecycle support.
Supply support for TLV840MAPH29DBVRQ1 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 designing analog and embedded processing solutions for automotive, industrial, and personal electronics markets.
The TLV840-Q1 product line delivers ultra-low-power, AEC-Q100-qualified voltage supervisors optimized for power integrity monitoring in next-generation automotive ECUs and battery-sensitive ADAS subsystems.
FAQ
What is the exact detection threshold voltage of TLV840MAPH29DBVRQ1?
The TLV840MAPH29DBVRQ1 has a factory-trimmed fixed negative-going input threshold (VIT−) of 2.9 V with ±0.5% typical accuracy across –40°C to +125°C. This value is laser-trimmed during production and specified in the Electrical Characteristics table under "VIT– Negative-going input threshold accuracy" with test conditions confirming 2.9 V nominal setting.
Does TLV840MAPH29DBVRQ1 require an external pull-up resistor on the RESET pin?
No, TLV840MAPH29DBVRQ1 does not require an external pull-up resistor because it uses a push-pull active-high output topology. The RESET pin actively drives high during assertion and low during deassertion, eliminating dependency on external biasing-unlike open-drain variants such as TLV840MADH29DBVRQ1.
How is the reset time delay programmed on TLV840MAPH29DBVRQ1?
The reset time delay (tD) on TLV840MAPH29DBVRQ1 is programmed by connecting an external capacitor between the CT pin and GND. With CT floating, tD is 40 µs typical. Using Equation tD (typ) = −ln(0.29) × 500 kΩ × CCT + 40 µs, a 100 nF capacitor yields ~620 µs delay. Capacitor values up to 1 µF are supported for delays up to 619 ms.
What is the purpose of the MR pin on TLV840MAPH29DBVRQ1?
The MR (Manual Reset) pin on TLV840MAPH29DBVRQ1 allows external logic to force a system reset regardless of VDD level: pulling MR low for ≥500 ns asserts RESET high immediately. After MR returns high, RESET deasserts only after the programmed tD delay expires-enabling controlled firmware-triggered restarts in automotive head units and telematics modules.
Is TLV840MAPH29DBVRQ1 qualified for automotive use?
Yes, TLV840MAPH29DBVRQ1 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 C7B (±750 V). It is specifically designed for safety-critical domains including radar ECUs, ADAS controllers, and emergency call systems.
TLV840MAPH29DBVRQ1 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:
- 2.9V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- 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
TLV840MAPH29DBVRQ1 FAQ
1.How can I place an order for TLV840MAPH29DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV840MAPH29DBVRQ1 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 TLV840MAPH29DBVRQ1 reliable?
The price and inventory of TLV840MAPH29DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV840MAPH29DBVRQ1 is usually 5 days.
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TLV840MAPH29DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV840MAPH29DBVRQ1 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 TLV840MAPH29DBVRQ1?
For technical support, including TLV840MAPH29DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV840MAPH29DBVRQ1 requirements.
6.How does Aetrix verify that TLV840MAPH29DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TLV840MAPH29DBVRQ1 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 TLV840MAPH29DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TLV840MAPH29DBVRQ1?
All TLV840MAPH29DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLV840MAPH29DBVRQ1, 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 TLV840MAPH29DBVRQ1 part is unused and in its original packaging.
Return procedure for TLV840MAPH29DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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