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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Texas Instruments TLV840MADL32DBVRQ1

Name: TLV840MADL32DBVRQ1
Brand: Texas Instruments
SKU: TLV840MADL32DBVRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLV840MADL32DBVRQ1

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: TLV840MADL32DBVRQ1.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

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Product details

Overview

TLV840MADL32DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive voltage supervisor IC with open-drain active-low reset output, 3.2 V fixed threshold (V_IT−), 120 nA typical supply current, ±0.5% threshold accuracy, 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 brownout detection are critical.

For engineers reviewing the TLV840MADL32DBVRQ1 datasheet, TLV840MADL32DBVRQ1 pinout, TLV840MADL32DBVRQ1 application, or TLV840MADL32DBVRQ1 equivalent, key selection criteria include its 3.2 V detection threshold, 40 µs minimum reset delay (CT pin floating), -40°C to +125°C operation, open-drain output compatibility with 3.3 V/5 V microcontrollers, and AEC-Q100 qualification for automotive safety-critical subsystems.

Technical Context

The TLV840MADL32DBVRQ1 implements a precision bandgap-based comparator with built-in 5% hysteresis (V_HYS) to prevent chatter during slow-rising/falling VDD transitions. Its internal timer circuit uses the CT pin's RC time constant-driven by a 500 kΩ internal resistance-to generate user-defined reset delays from 40 µs to >600 ms.

It features dual reset assertion paths: automatic detection when VDD falls below 3.2 V (V_IT−), and manual reset via MR pin with 1 µs propagation delay and 500 ns minimum pulse width. Power-on reset (V_POR = 700 mV) ensures defined output state during startup.

Key Specifications

Parameter	Value and Actual Design Meaning
V_IT− Threshold	3.2 V fixed; enables reliable monitoring of 3.3 V LDO outputs with margin against ripple-induced false resets
Supply Current (I_DD)	120 nA typical at 25°C; supports multi-year battery life in always-on automotive modules
Threshold Accuracy	±0.5% typical; eliminates need for external calibration in safety-critical ADAS power sequencing
Reset Delay (t_D)	40 µs min (CT pin floating); provides fast fault response without external capacitor
Hysteresis (V_HYS)	5% typical (160 mV at 3.2 V); prevents oscillation during marginal VDD conditions near trip point
Operating Temp	-40°C to +125°C ambient; meets AEC-Q100 Grade 1 for under-hood and infotainment applications
Output Type	Open-drain active-low; allows level-shifting to higher voltage rails (up to 6.5 V) 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 matte tin lead finish.

Pin/Terminal	Circuit Role	Design Meaning
1: RESET	Open-drain active-low output	Drives low when VDD < 3.2 V or MR asserted; requires external pull-up resistor to define high-level voltage
2: VDD	Supply input & monitored rail	Input voltage range 0.7 V–6 V; powers internal circuitry and serves as detection source
3: GND	Ground reference	Common return path for internal comparator, timer, and output stage
4: MR	Active-low manual reset input	Pull to GND ≥500 ns to force reset; internally pulled up to VDD (100 kΩ)
5: CT	Capacitor time-delay programming	Connect external capacitor to GND to extend t_D; floating = 40 µs min delay

Key Features

Feature	Design Value
Nano-power operation	120 nA I_DD enables integration into always-on vehicle networks without compromising battery runtime
Automotive qualification	AEC-Q100 Grade 1 certified with HBM ±2 kV / CDM ±750 V ESD robustness for harsh automotive environments
Programmable reset timing	CT pin supports 40 µs–6.2 s delay range using 0–10 µF capacitor, enabling flexible system boot sequencing
Glitch-immune detection	10 µs minimum pulse rejection at 5% V_IT− overdrive prevents false resets from transient noise on VDD rail
Low-leakage open-drain output	100 nA max Ilkg(OD) at 125°C ensures minimal loading on pull-up networks in high-impedance systems

Applications

Surround View System	Automotive Gateway
Use Scenario: Monitors 3.3 V camera sensor power rail in multi-camera surround-view ECU to detect brownout before image corruption occurs. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to SoC upon VDD drop below 3.2 V, with 40 µs delay ensuring clean deassertion after recovery. Use Value: Prevents corrupted frame capture during engine cranking by guaranteeing reset hold time exceeds sensor initialization latency.	Use Scenario: Supervises 5 V CAN transceiver supply in central gateway module handling multiple domain controllers. IC Role / Device Role / Timing Role: Detects undervoltage on 5 V rail and asserts open-drain RESET to MCU; CT pin configured for 100 ms delay to coordinate multi-node wake-up. Use Value: Enables synchronized reinitialization of CAN FD interfaces across domains after power interruption, avoiding bus arbitration conflicts.
Radar ECU	ADAS Controller
Use Scenario: Watches 1.2 V FPGA core voltage in 77 GHz radar processing unit where nanosecond-level timing margins exist. IC Role / Device Role / Timing Role: Provides 3.2 V threshold supervision (via resistive divider from 1.2 V rail) with ±0.5% accuracy to avoid premature reset during thermal drift. Use Value: Maintains functional safety integrity by eliminating false resets that could interrupt real-time FFT processing during object detection.	Use Scenario: Controls power-up sequence of dual-core processor and GPU in autonomous driving domain controller. IC Role / Device Role / Timing Role: Uses MR pin to accept hard-reset command from safety monitor IC; CT pin set for 200 ms delay to allow DDR4 initialization before CPU release. Use Value: Ensures deterministic boot order between safety-critical and performance cores, satisfying ISO 26262 ASIL-B timing requirements.

Surround View System

Automotive Gateway

Use Scenario: Monitors 3.3 V camera sensor power rail in multi-camera surround-view ECU to detect brownout before image corruption occurs.

IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to SoC upon VDD drop below 3.2 V, with 40 µs delay ensuring clean deassertion after recovery.

Use Value: Prevents corrupted frame capture during engine cranking by guaranteeing reset hold time exceeds sensor initialization latency.

Use Scenario: Supervises 5 V CAN transceiver supply in central gateway module handling multiple domain controllers.

IC Role / Device Role / Timing Role: Detects undervoltage on 5 V rail and asserts open-drain RESET to MCU; CT pin configured for 100 ms delay to coordinate multi-node wake-up.

Use Value: Enables synchronized reinitialization of CAN FD interfaces across domains after power interruption, avoiding bus arbitration conflicts.

Radar ECU

ADAS Controller

Use Scenario: Watches 1.2 V FPGA core voltage in 77 GHz radar processing unit where nanosecond-level timing margins exist.

IC Role / Device Role / Timing Role: Provides 3.2 V threshold supervision (via resistive divider from 1.2 V rail) with ±0.5% accuracy to avoid premature reset during thermal drift.

Use Value: Maintains functional safety integrity by eliminating false resets that could interrupt real-time FFT processing during object detection.

Use Scenario: Controls power-up sequence of dual-core processor and GPU in autonomous driving domain controller.

IC Role / Device Role / Timing Role: Uses MR pin to accept hard-reset command from safety monitor IC; CT pin set for 200 ms delay to allow DDR4 initialization before CPU release.

Use Value: Ensures deterministic boot order between safety-critical and performance cores, satisfying ISO 26262 ASIL-B timing requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3840DL32QDBVRQ1	Higher 350 nA I_DD, same 3.2 V threshold and SOT-23-5 package; no MR pin	Lacks manual reset capability; unsuitable for systems requiring host-initiated hard reset	Choose when only automatic supervision is needed and lowest possible BOM count is prioritized
MAX6373KATA+T	Fixed 3.08 V threshold, 1.6 µA I_DD, SC70-5 package; includes watchdog timer	Higher current draw limits battery-life applications; watchdog function adds complexity not present in TLV840MADL32DBVRQ1	Choose when combined reset + watchdog functionality justifies higher quiescent current and different footprint

Compared with TPS3840DL32QDBVRQ1 and MAX6373KATA+T, TLV840MADL32DBVRQ1 uniquely delivers nano-power operation (120 nA), AEC-Q100 Grade 1 qualification, and integrated manual reset-all in the standard SOT-23-5 footprint-making it optimal for next-generation ADAS modules requiring both ultra-low power and functional safety compliance.

Availability

TLV840MADL32DBVRQ1 is available at Aetrix Electronics and suitable for automotive radar ECUs, ADAS controllers, surround-view systems, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV840MADL32DBVRQ1 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 chips for automotive, industrial, and personal electronics markets.

The TLV840-Q1 product line delivers AEC-Q100 qualified nano-power voltage supervisors optimized for automotive power-rail monitoring, featuring programmable reset delay, manual reset, and high-accuracy thresholds to meet ASIL-ready system requirements.

FAQ

What is the exact fixed threshold voltage of the TLV840MADL32DBVRQ1?

The TLV840MADL32DBVRQ1 has a factory-set negative-going input threshold voltage (V_IT−) of exactly 3.2 V, with ±0.5% typical accuracy across –40°C to +125°C. This value is confirmed in TI's SNVSBY3A datasheet Section 7.5 and corresponds to the "32" in the part number per TI's naming convention (08 = 0.8 V, 32 = 3.2 V, 54 = 5.4 V).

Does the TLV840MADL32DBVRQ1 require an external pull-up resistor on the RESET pin?

Yes, the TLV840MADL32DBVRQ1 uses an open-drain active-low RESET output, so an external pull-up resistor is mandatory to establish a valid high logic level. The datasheet specifies a recommended 100 kΩ pull-up to VDD, but the resistor may connect to any voltage ≤6.5 V independent of VDD, enabling level-shifting in mixed-voltage systems.

How is the reset time delay programmed on the TLV840MADL32DBVRQ1?

The reset time delay (t_D) on TLV840MADL32DBVRQ1 is programmed by connecting an external capacitor between the CT pin and GND. With CT floating, t_D defaults to 40 µs (typ). Using Equation 3 from the datasheet (C_CT = (t_D – 80 µs) ÷ 618937), a 100 nF capacitor yields ~62 ms delay. Maximum supported capacitance is 10 µF for delays up to 6.2 s.

What automotive qualification does the TLV840MADL32DBVRQ1 hold?

The TLV840MADL32DBVRQ1 is AEC-Q100 qualified for automotive applications, specifically Grade 1 with –40°C to +125°C ambient operating temperature. It also meets HBM ESD Level 2 (±2 kV) and CDM Level C7B (±750 V), as documented in Section 1 of the SNVSBY3A datasheet.

Can the TLV840MADL32DBVRQ1 monitor a 1.2 V rail directly?

No, the TLV840MADL32DBVRQ1 cannot directly monitor a 1.2 V rail because its minimum V_IT− is 3.2 V and minimum operating VDD is 0.7 V-but the monitored voltage must equal VDD. To supervise 1.2 V, use a resistive divider to scale the rail to 3.2 V at VDD, ensuring the divider's Thevenin resistance stays within the device's input impedance specifications per Section 8.3.1.

TLV840MADL32DBVRQ1 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:: 3.2V

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

TLV840MADL32DBVRQ1 FAQ

1.How can I place an order for TLV840MADL32DBVRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLV840MADL32DBVRQ1 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 TLV840MADL32DBVRQ1 reliable?

The price and inventory of TLV840MADL32DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV840MADL32DBVRQ1 is usually 5 days.

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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV840MADL32DBVRQ1 transactions.

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4.How is shipping managed for TLV840MADL32DBVRQ1?

TLV840MADL32DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLV840MADL32DBVRQ1 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 TLV840MADL32DBVRQ1?

For technical support, including TLV840MADL32DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV840MADL32DBVRQ1 requirements.

6.How does Aetrix verify that TLV840MADL32DBVRQ1 is sourced from the original manufacturer or authorized distributors?

All TLV840MADL32DBVRQ1 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 TLV840MADL32DBVRQ1 meets industry standards.

7.What is the process for return or replacement of TLV840MADL32DBVRQ1?

All TLV840MADL32DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLV840MADL32DBVRQ1, 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 TLV840MADL32DBVRQ1 part is unused and in its original packaging.

Return procedure for TLV840MADL32DBVRQ1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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