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Analog Devices Inc./Maxim Integrated MAX6719AUTSDD1+T
- Part No.:
- MAX6719AUTSDD1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719AUTSDD1+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,967
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Product details
Overview
MAX6719AUTSDD1+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with factory-trimmed reset thresholds, 1.1ms minimum reset timeout, and RSTIN input for adjustable third-voltage monitoring down to 0.62V. It asserts active-low open-drain reset when either supply falls below threshold and maintains reset for the timeout period - used in telecom power management and multivoltage embedded systems.
For engineers reviewing the MAX6719AUTSDD1+T datasheet, MAX6719AUTSDD1+T pinout, MAX6719AUTSDD1+T application, or MAX6719AUTSDD1+T equivalent, key selection criteria include dual-supply voltage monitoring range, guaranteed reset validity down to VCC = 0.8V, low 14µA typical supply current at 3.6V, open-drain RST output referenced to VCC1, and compatibility with manual-reset, watchdog, and power-fail functions in compact SOT23-6 footprint.
Technical Context
The MAX6719AUTSDD1+T implements dual independent voltage comparators with internal 0.626V reference for RSTIN, hysteresis of 0.5% of threshold, and temperature coefficient of 20ppm/°C. Its reset logic combines VCC1/VCC2 undervoltage detection, RSTIN comparator output, and MR assertion - all triggering a single open-drain RST output with programmable timeout.
It features a dedicated RSTIN input (611–642mV threshold), 100nA max input leakage, and 22µs propagation delay from RSTIN to RST assertion. The device operates across –40°C to +125°C and guarantees valid reset state as long as VCC1 or VCC2 ≥ 0.8V - enabling robust brownout protection in battery-backed and automotive-grade applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VCC1: 0.8V–5.5V; VCC2: 0.8V–5.5V - supports operation during deep brownout and enables monitoring of sub-1V core supplies. |
| Reset Timeout Period | 1.1ms (min) - ensures sufficient hold time for µP initialization after power recovery. |
| VCC1 Reset Threshold | 4.625V (typ), ±125mV tolerance - factory-trimmed for precise 4.63V nominal trip point on primary supply. |
| VCC2 Reset Threshold | 3.075V (typ), ±75mV tolerance - factory-trimmed for precise 3.08V nominal trip point on secondary supply. |
| RSTIN Threshold | 626.5mV (typ), ±15.5mV - internal reference enabling external resistor-divider to monitor auxiliary voltages down to 0.62V. |
| Supply Current | 14µA (typ) at 3.6V - ultra-low quiescent current extends battery life in portable equipment. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and extended-temperature automotive subsystems. |
Pinout & Package
SOT23-6 package (package code U6+1), 1.6mm × 2.9mm footprint, 0.95mm height, thermal resistance θJA = 115°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST/RST1 | Active-low open-drain reset output referenced to VCC1; requires external pullup; asserts when VCC1/VCC2/RSTIN drops below threshold or MR is pulled low. |
| 2 | GND | Ground reference for all internal comparators and logic; must be connected to system ground plane for stable threshold accuracy. |
| 3 | MR | Active-low manual-reset input with internal 50kΩ pullup to VCC1; 1µs minimum pulse width; immune to <100ns glitches. |
| 4 | VCC2 | Secondary supply input powering internal VCC2 comparator and referenced for RST2 (not present on this variant); monitors 0.9V–3.3V supplies. |
| 5 | VCC1 | Primary supply input powering core logic and referenced for RST output; monitors 1.8V–5.0V supplies with 4.625V threshold. |
| 6 | RSTIN | High-impedance adjustable reset input; 626.5mV internal reference enables monitoring of third supply via resistor divider (e.g., 0.62V–5.0V range). |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply monitoring | Simultaneous VCC1 (4.625V typ) and VCC2 (3.075V typ) supervision with separate comparators and hysteresis - eliminates need for two discrete supervisors. |
| Adjustable third-voltage monitor | RSTIN input with 626.5mV reference and <100nA leakage enables precision monitoring of auxiliary rails (e.g., 1.2V, 1.8V, 2.5V) using high-value resistors to minimize power loss. |
| Guaranteed reset validity at low VCC | Reset output remains logic-valid down to VCC1 or VCC2 = 0.8V - critical for fail-safe behavior during gradual brownout conditions. |
| Immunity to short VCC transients | Withstands negative-going VCC glitches up to 20µs (at 100mV overdrive) without false reset - reduces need for excessive input filtering. |
| Low-power operation | 14µA typical ICC1 at 3.6V enables use in always-on battery-powered systems such as IoT sensors and remote controllers. |
Applications
| Telecom Power Sequencing | Industrial Multivoltage Controller |
|---|---|
Use Scenario: Monitoring primary 3.3V and secondary 1.2V rails in a base station RF module during cold start and hot-swap events. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting open-drain RST to hold FPGA in reset until both rails stabilize within 1.1ms timeout window. Use Value: Prevents configuration corruption by ensuring FPGA only exits reset after both supplies meet factory-trimmed thresholds (3.075V and 1.110V). |
Use Scenario: Supervising 24V DC input and isolated 5V/3.3V converter outputs in a PLC I/O module exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Monitoring VCC1 (5V) and VCC2 (3.3V) while using RSTIN to track auxiliary 2.5V analog sensor rail - all within –40°C to +125°C range. Use Value: Enables single-chip triple-rail supervision with guaranteed reset validity at 0.8V, eliminating discrete resistor networks and reducing BOM count by 2 ICs. |
| Portable Medical Device | Automotive Infotainment Core |
Use Scenario: Managing Li-ion battery (3.0–4.2V) and regulated 1.8V SoC core supply in a handheld ultrasound probe. IC Role / Device Role / Timing Role: Using VCC1 for battery voltage monitoring and RSTIN for precise 1.8V core rail supervision via resistor divider - triggering reset before brownout-induced data loss. Use Value: 14µA typical supply current extends battery runtime; 0.626V internal reference enables accurate 1.8V monitoring with <±1.5% error across temperature. |
Use Scenario: Ensuring reliable boot of ARM-based infotainment MCU powered by 5V main and 3.3V I/O supplies in vehicle cabin environment. IC Role / Device Role / Timing Role: Dual-supply monitoring with MR input tied to ignition switch signal - asserting RST during engine cranking (VCC dip) and holding reset for 1.1ms post-recovery. Use Value: Factory-trimmed 4.625V/3.075V thresholds match automotive 5V/3.3V regulator tolerances; –40°C to +125°C rating meets AEC-Q100 Grade 0 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTSDD1+T | Identical pinout and package; differs only in VCC1 reset threshold (3.075V vs. 4.625V) and VCC2 threshold (2.625V vs. 3.075V). | Targeted at 3.3V/2.5V systems rather than 5V/3.3V; unsuitable where primary supply exceeds 3.3V. | Select MAX6720AUTSDD1+T only when monitoring lower primary supply voltages; MAX6719AUTSDD1+T is required for 4.63V nominal VCC1 trip. |
| TPS3808G33DBVR | Single-supply (3.3V only), no RSTIN input, fixed 3.08V threshold, 200ms min timeout - lacks dual-monitoring and adjustable third-rail capability. | Applicable only for single-rail 3.3V systems; cannot replace MAX6719AUTSDD1+T in dual-supply or triple-voltage designs. | Use TPS3808G33DBVR only as cost-optimized alternative in simple 3.3V-only applications; MAX6719AUTSDD1+T remains necessary for multivoltage integrity. |
Compared with MAX6720AUTSDD1+T and TPS3808G33DBVR, the MAX6719AUTSDD1+T uniquely delivers factory-trimmed 4.63V/3.08V dual thresholds in SOT23-6 with RSTIN adjustability - making it irreplaceable for 5V/3.3V systems requiring third-rail monitoring and guaranteed 0.8V reset validity.
Availability
MAX6719AUTSDD1+T is available at Aetrix Electronics and suitable for telecom power sequencing, industrial multivoltage controllers, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6719AUTSDD1+T 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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications - emphasizing reliability, low power, and high integration in harsh environments.
The MAX6715A–MAX6729A family was engineered specifically for multivoltage microprocessor supervision in space-constrained, thermally demanding systems - delivering dual/third-rail monitoring, watchdog, and manual-reset functions in sub-3mm SOT23 packages.
FAQ
What is the exact reset timeout period for MAX6719AUTSDD1+T?
The MAX6719AUTSDD1+T has a minimum reset timeout period of 1.1ms, with typical value 1.65ms and maximum 2.2ms. This fixed timeout is factory-programmed per the "D1" suffix and applies after any reset trigger event - including VCC1/VCC2 undervoltage, RSTIN drop, or MR assertion. The timeout begins when the fault condition clears and ends with RST deassertion.
Does MAX6719AUTSDD1+T support watchdog functionality?
No, the MAX6719AUTSDD1+T does not include watchdog functionality. Its part number suffix "D1" indicates reset timeout only; watchdog capability is reserved for variants with "W" suffix (e.g., MAX6721A). The MAX6719AUTSDD1+T provides RSTIN, MR, and dual-supply monitoring but omits WDI pin and internal watchdog timer circuitry.
What is the function of the RSTIN pin on MAX6719AUTSDD1+T?
The RSTIN pin on MAX6719AUTSDD1+T is a high-impedance input with 626.5mV internal reference voltage, enabling external resistor-divider networks to monitor a third supply voltage - such as 1.2V, 1.8V, or 2.5V - with precision down to 0.62V. When RSTIN falls below 626.5mV, the device asserts RST, providing true triple-voltage supervision in a 6-pin SOT23 package.
Can MAX6719AUTSDD1+T operate with VCC1 = 2.5V and VCC2 = 1.8V?
Yes, MAX6719AUTSDD1+T fully supports VCC1 = 2.5V and VCC2 = 1.8V. Its absolute ratings allow VCC1 and VCC2 from 0.8V to 5.5V, and its electrical characteristics are specified across –40°C to +125°C at these voltages. At 2.5V/1.8V, the device draws ~10µA total supply current and maintains full reset accuracy with 0.5% hysteresis and 20ppm/°C tempco.
Is MAX6719AUTSDD1+T RoHS-compliant and lead-free?
Yes, MAX6719AUTSDD1+T is RoHS-compliant and lead-free. The "+T" suffix in the part number explicitly denotes lead-free, halogen-free, and RoHS-compliant packaging per Maxim Integrated's standard qualification. The SOT23-6 package uses matte tin lead finish and conforms to JEDEC J-STD-020 moisture sensitivity level 1.
MAX6719AUTSDD1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 0.788V, 2.925V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1.1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6719AUTSDD1+T FAQ
1.How can I place an order for MAX6719AUTSDD1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719AUTSDD1+T 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 MAX6719AUTSDD1+T reliable?
The price and inventory of MAX6719AUTSDD1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719AUTSDD1+T is usually 5 days.
3.What payment methods are accepted for MAX6719AUTSDD1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719AUTSDD1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719AUTSDD1+T?
MAX6719AUTSDD1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719AUTSDD1+T 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 MAX6719AUTSDD1+T?
For technical support, including MAX6719AUTSDD1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719AUTSDD1+T requirements.
6.How does Aetrix verify that MAX6719AUTSDD1+T is sourced from the original manufacturer or authorized distributors?
All MAX6719AUTSDD1+T 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 MAX6719AUTSDD1+T meets industry standards.
7.What is the process for return or replacement of MAX6719AUTSDD1+T?
All MAX6719AUTSDD1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719AUTSDD1+T, 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 MAX6719AUTSDD1+T part is unused and in its original packaging.
Return procedure for MAX6719AUTSDD1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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