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Analog Devices Inc./Maxim Integrated MAX6719AUTWGD3+
- Part No.:
- MAX6719AUTWGD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719AUTWGD3+.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,110
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Product details
Overview
MAX6719AUTWGD3+ 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, 140ms minimum reset timeout, and adjustable RSTIN input for third-voltage monitoring down to 0.626V. It asserts active-low push-pull RST output when either supply falls below threshold and maintains reset for ≥140ms after recovery - used in telecom power management and industrial embedded controllers.
For engineers reviewing the MAX6719AUTWGD3+ datasheet, MAX6719AUTWGD3+ pinout, MAX6719AUTWGD3+ application, or MAX6719AUTWGD3+ equivalent, key selection criteria include guaranteed reset validity down to VCC1/VCC2 = 0.8V, 14μA typical supply current at 3.6V, RSTIN threshold of 626.5mV ±15.5mV, 20µs VCC-to-RST delay, and compatibility with manual-reset, watchdog, and power-fail functions per device variant.
Technical Context
The MAX6719AUTWGD3+ implements dual independent voltage comparators with internal 0.626V reference for RSTIN, hysteresis of 3mV on RSTIN/PFI inputs, and a digital reset timeout timer with fixed 140ms (D3 suffix) minimum assertion period. Its push-pull RST output is referenced to VCC1 and guarantees VOL ≤ 0.3V at ISINK = 500µA.
It supports manual reset via MR (internal 50kΩ pullup to VCC1), watchdog disable by leaving WDI floating, and power-fail monitoring only if PFI/PFO pins are present - but MAX6719A variants exclude PFI/PFO per Pin Description table (MAX6719A uses pins 1=RST, 2=GND, 3=MR, 4=VCC2, 5=VCC1, 6=RSTIN).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Timeout Period | 140ms (min) - ensures sufficient hold time for processor initialization after brownout recovery |
| VCC1 Reset Threshold | 4.625V (typ) - factory-trimmed for 5V primary rail supervision with ±125mV tolerance |
| VCC2 Reset Threshold | 3.075V (typ) - factory-trimmed for 3.3V secondary rail with ±75mV tolerance |
| RSTIN Threshold Voltage | 626.5mV (typ) - internal reference enabling precise third-voltage monitoring via resistor divider |
| Supply Current | 14μA (typ at 3.6V) - enables battery-backed systems to maintain supervision >10 years on coin cell |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| VCC Validity Guarantee | Reset logic valid down to VCC1 or VCC2 = 0.8V - prevents spurious resets during deep brownout |
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 | Active-low push-pull reset output referenced to VCC1; drives low during fault and holds for 140ms post-recovery |
| 2 | GND | System ground reference for all internal comparators and logic |
| 3 | MR | Active-low manual-reset input with internal 50kΩ pullup to VCC1; 1µs minimum pulse width required |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V); powers internal VCC2 comparator and sets RST2 reference if present |
| 5 | VCC1 | Primary supply input (1.8V–5.0V); powers core logic, sets RST output reference, and enables reset assertion |
| 6 | RSTIN | High-impedance adjustable reset input; asserts RST when voltage falls below 626.5mV internal reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply monitoring | Simultaneous VCC1 (1.8–5.0V) and VCC2 (0.9–3.3V) supervision with separate thresholds and hysteresis |
| Adjustable third-voltage monitor | RSTIN input with 626.5mV reference enables monitoring of auxiliary rails (e.g., 1.2V, 1.8V) using external resistor divider |
| Low-power operation | 14μA typical supply current allows integration into always-on subsystems without compromising battery life |
| Brownout immunity | Guaranteed correct reset state down to VCC1 or VCC2 = 0.8V - critical for graceful shutdown in deep undervoltage |
| Fast fault response | 20µs max VCC-to-RST delay ensures rapid system reaction to supply collapse before processor corruption |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring dual DC/DC outputs (5V and 3.3V) in base station power management unit during hot-swap insertion. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting RST to ARM Cortex-M7 MCU upon any rail dropout, holding reset for 140ms to prevent partial initialization. Use Value: Eliminates need for discrete comparators and RC timers, reducing BOM count by 4 components and PCB area by 12mm². |
Use Scenario: Ensuring deterministic startup of analog input conditioning circuitry and isolated CAN transceivers in modular PLC backplane. IC Role / Device Role / Timing Role: Supervising 24V-to-5V and 5V-to-3.3V converter outputs while using RSTIN to monitor isolated 12V auxiliary supply for sensor biasing. Use Value: Enables single-chip triple-rail supervision with <15ppm/°C tempco on reset thresholds, meeting IEC 61000-4-2 immunity requirements. |
| Automotive Infotainment Head Unit | Medical Portable Monitor Battery Backup |
Use Scenario: Validating 5V main and 3.3V SoC rails in AEC-Q100-compliant infotainment head unit during cold-crank (4.5V battery dip). IC Role / Device Role / Timing Role: Asserting push-pull RST to application processor only when both VCC1 and VCC2 remain below thresholds for ≥140ms - rejecting sub-100ms transients. Use Value: Prevents false resets during engine cranking, improving user experience and reducing firmware recovery overhead. |
Use Scenario: Maintaining supervision during AC power loss in portable ECG monitor, switching to coin-cell backup while monitoring 3.3V LDO and 1.8V ADC supply. IC Role / Device Role / Timing Role: Using RSTIN to track backup rail voltage and trigger controlled shutdown sequence before brownout-induced data loss. Use Value: Achieves >10-year shelf life on CR2032 via 14μA quiescent current, with guaranteed reset assertion at VCC2 = 0.8V for final safety cutoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTWGD3+ | Identical pinout and electrical specs; differs only in factory-trimmed VCC1 threshold (4.375V typ vs. 4.625V) | Optimized for 4.5V nominal systems rather than 5V rails | Select MAX6720AUTWGD3+ when primary supply is 4.5V ±5% and tighter VTH1 matching is required |
| TPS3808G33DBVR | Single-supply (VDD only), no VCC2/RSTIN inputs; 3.3V fixed threshold, 200ms timeout, 2.5μA IQ | Lacks dual-rail monitoring and adjustable third input - suitable only for single-rail systems | Choose TPS3808G33DBVR for cost-sensitive 3.3V-only applications where space permits separate supervisors per rail |
Compared with MAX6720AUTWGD3+, the MAX6719AUTWGD3+ provides higher VCC1 reset threshold (4.625V vs. 4.375V) for robust 5V rail supervision; compared with TPS3808G33DBVR, it delivers true dual-supply monitoring and RSTIN flexibility at the cost of higher quiescent current (14μA vs. 2.5μA), making it essential for multivoltage systems requiring coordinated reset timing.
Availability
MAX6719AUTWGD3+ is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC I/O modules, automotive infotainment head units, medical portable monitors, and set-top box power management requiring stable component supply across extended temperature ranges.
Supply support for MAX6719AUTWGD3+ 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, sensing, and interface applications, with emphasis on high-reliability industrial and automotive markets.
The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multirail embedded systems requiring guaranteed reset behavior down to 0.8V supply and minimal quiescent current - targeting telecom, industrial control, and automotive ECUs.
FAQ
What is the exact reset timeout period of MAX6719AUTWGD3+?
The MAX6719AUTWGD3+ has a guaranteed minimum reset timeout period of 140ms (D3 suffix), with typical value 210ms and maximum 280ms over temperature. This fixed timeout ensures sufficient hold time for microprocessor initialization after power recovery, and is implemented via an internal digital timer unaffected by external capacitor drift or temperature variation.
Does MAX6719AUTWGD3+ support power-fail detection (PFI/PFO)?
No, MAX6719AUTWGD3+ does not include PFI or PFO functionality. Per the Pin Description table, MAX6719A variants use pins 1=RST, 2=GND, 3=MR, 4=VCC2, 5=VCC1, 6=RSTIN - omitting PFI/PFO pins present only in MAX6728A/MAX6729A/MAX6797A variants. For power-fail monitoring, select MAX6729AUTWGD3+ instead.
What are the factory-trimmed reset thresholds for VCC1 and VCC2 on MAX6719AUTWGD3+?
The MAX6719AUTWGD3+ uses 'W' suffix for VCC1 (4.625V typical, 4.500V–4.750V min/max) and 'G' suffix for VCC2 (3.075V typical, 3.000V–3.150V min/max), per the Reset Voltage Threshold Suffix Guide. These thresholds are laser-trimmed at wafer test and guaranteed over -40°C to +125°C.
Can MAX6719AUTWGD3+ monitor a 1.2V supply using RSTIN?
Yes. With RSTIN's 626.5mV internal reference, a resistor divider (e.g., R1 = 100kΩ, R2 = 100kΩ) scales 1.2V to 600mV at RSTIN - triggering reset when input drops below ~1.16V. The 100nA max RSTIN input current ensures minimal divider loading, enabling high-resistance networks for ultra-low power consumption.
Is MAX6719AUTWGD3+ qualified for automotive applications?
The MAX6719AUTWGD3+ itself is not AEC-Q100 qualified; only the MAX6719AUTTWD1/V+T variant is explicitly listed as AEC-Q100 qualified in the datasheet. However, its -40°C to +125°C operating range, 0.8V reset validity guarantee, and SOT23-6 package meet key automotive environmental requirements - qualification status must be verified per specific part number with Analog Devices.
MAX6719AUTWGD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.11V, 1.665V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6719AUTWGD3+ FAQ
1.How can I place an order for MAX6719AUTWGD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719AUTWGD3+ 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 MAX6719AUTWGD3+ reliable?
The price and inventory of MAX6719AUTWGD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719AUTWGD3+ is usually 5 days.
3.What payment methods are accepted for MAX6719AUTWGD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719AUTWGD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719AUTWGD3+?
MAX6719AUTWGD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719AUTWGD3+ 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 MAX6719AUTWGD3+?
For technical support, including MAX6719AUTWGD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719AUTWGD3+ requirements.
6.How does Aetrix verify that MAX6719AUTWGD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6719AUTWGD3+ 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 MAX6719AUTWGD3+ meets industry standards.
7.What is the process for return or replacement of MAX6719AUTWGD3+?
All MAX6719AUTWGD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719AUTWGD3+, 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 MAX6719AUTWGD3+ part is unused and in its original packaging.
Return procedure for MAX6719AUTWGD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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