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Analog Devices Inc./Maxim Integrated MAX6719UTZGD3+
- Part No.:
- MAX6719UTZGD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6719UTZGD3+.pdf
- Description:
- IC MPU SUPERVISOR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,667
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Product details
Overview
MAX6719UTZGD3+ from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (4.625V threshold), VCC2 (3.075V threshold), and an externally adjustable RSTIN input (626.5mV reference). It asserts active-low open-drain reset for ≥210ms after any supply drop, supports manual reset and watchdog timer, and operates from -40°C to +85°C. Used in multivoltage telecom and portable systems requiring reliable power-up sequencing and brownout protection.
For engineers reviewing the MAX6719UTZGD3+ datasheet, MAX6719UTZGD3+ pinout, MAX6719UTZGD3+ application, or MAX6719UTZGD3+ equivalent, key selection criteria include dual-supply monitoring with third adjustable rail, guaranteed reset validity down to VCC1/VCC2 = 0.8V, 14µA typical supply current at 3.6V, and compatibility with battery-operated and industrial embedded designs requiring low-power, high-immunity supervision.
Technical Context
The MAX6719UTZGD3+ implements independent voltage comparators for primary (VCC1), secondary (VCC2), and auxiliary (RSTIN) rails, each with factory-trimmed thresholds and 20ppm/°C tempco. Its reset logic combines OR-ed fault detection with a monolithic timeout counter ensuring minimum 210ms assertion after recovery.
It integrates a dual-mode watchdog timer-35s startup period followed by 1.12s normal timeout-with edge-triggered WDI input and internal 50kΩ MR pullup. All outputs are open-drain, referenced to VCC1 (RST) or VCC2 (RST2), and immune to sub-20µs VCC transients per characterization data.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±125mV tolerance); ensures clean reset during 5V system brownout |
| VCC2 Threshold | 3.075V (factory-trimmed, ±75mV tolerance); monitors 3.3V I/O or core supply independently |
| RSTIN Reference | 626.5mV internal reference; enables precise monitoring of third rail (e.g., 1.2V, 1.8V) via resistor divider |
| Reset Timeout | 210ms (minimum); provides sufficient hold time for FPGA/CPU initialization sequences |
| Supply Current | 14µA typical at 3.6V; enables >10-year battery life in always-on supervisory applications |
| Operating Temp | -40°C to +85°C; qualified for industrial and telecom equipment without derating |
| Reset Validity | Guaranteed down to VCC1 or VCC2 = 0.8V; ensures deterministic behavior during deep brownout |
Pinout & Package
Package: 6-pin SOT23-6, surface-mount, 1.6mm × 2.9mm footprint, 1.1mm height. RoHS-compliant lead-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low open-drain reset output | Asserts low on VCC1/VCC2/RSTIN fault or MR low; requires external pullup; referenced to VCC1 |
| 2 - GND | Ground reference | Common return for all internal comparators, timers, and output drivers |
| 3 - MR | Active-low manual reset input | Pulled up internally to VCC1 (50kΩ); initiates reset when driven <0.3×VCC1; 1µs minimum pulse width |
| 4 - VCC2 | Secondary supply input | Powers internal VCC2 comparator and RST2 driver; monitors 0.9V–3.3V rails |
| 5 - RSTIN | Adjustable undervoltage monitor input | High-impedance (±25nA) node comparing against 626.5mV reference; sets third-rail trip point |
| 6 - VCC1 | Primary supply input | Powers main logic, VCC1 comparator, and RST driver; monitors 1.8V–5.0V rails |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage monitoring | Simultaneous supervision of VCC1, VCC2, and RSTIN enables single-chip coverage of 3-rail SoC or FPGA power domains |
| Dual-mode watchdog | 35s startup window allows full boot sequence completion before enabling 1.12s runtime supervision |
| 0.8V reset validity | Ensures correct reset state even during severe brownout-no external pull-down needed for push-pull alternatives |
| Low 14µA supply current | Reduces quiescent load on backup batteries or energy-harvesting sources in always-on systems |
| Open-drain RST output | Enables wired-OR reset bus sharing across multiple supervisors or processors without contention |
Applications
| Telecom Power Sequencing | Portable Medical Device |
|---|---|
Use Scenario: Supervising 5V backplane, 3.3V interface, and 1.2V DSP core in LTE baseband unit with strict power-up order. IC Role / Device Role / Timing Role: Triple-rail supervisor enforcing VCC1→VCC2→RSTIN enable sequence and asserting reset until all rails stabilize for ≥210ms. Use Value: Prevents latch-up and configuration errors during hot-swap events by guaranteeing synchronized release of all domain resets. | Use Scenario: Monitoring main Li-ion (3.6V), regulated 3.3V I/O, and ultra-low-power 1.8V sensor subsystem in handheld ECG monitor. IC Role / Device Role / Timing Role: Detects battery sag below 3.075V (VCC2), core under-voltage at 1.8V via RSTIN divider, and forces safe shutdown before data corruption. Use Value: Extends usable battery life by enabling operation down to 0.8V on either rail while maintaining valid reset signaling. |
| Industrial PLC Controller | Set-Top Box Power Management |
Use Scenario: Securing 24V DC-DC converted 5V logic, isolated 3.3V communication, and 1.5V FPGA configuration rail in factory-floor controller. IC Role / Device Role / Timing Role: Provides fault-tolerant reset generation with manual override (MR) and watchdog (WDI) for firmware integrity verification. Use Value: Eliminates need for discrete RC reset circuits and reduces BOM count by consolidating three independent supervisors into one 6-pin IC. | Use Scenario: Managing 12V input, 5V main, and 1.2V SoC core in consumer STB with fast wake-from-standby requirements. IC Role / Device Role / Timing Role: Uses RSTIN to monitor standby rail integrity and triggers immediate reset if 5V drops below 4.625V during power transition. Use Value: Achieves <100ms wake latency by avoiding software-based reset validation and enabling hardware-level power-state coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTZGD3+ | Same triple-monitor architecture and pinout, but push-pull RST output instead of open-drain | Requires no external pullup; unsuitable for wired-OR reset buses or level-shifting interfaces | Select MAX6720UTZGD3+ only when driving single-load reset lines with VCC1-referenced logic levels |
| TPS3808G33DBVR | Dual-supply monitor (VDD, VDDIO) only; no RSTIN input; fixed 3.3V threshold; 200ms timeout | Lacks third-rail flexibility and adjustable monitoring; lower quiescent current (1.1µA) | Choose TPS3808G33DBVR for cost-sensitive dual-rail apps where RSTIN functionality is unnecessary |
Compared with MAX6720UTZGD3+, the MAX6719UTZGD3+ offers open-drain flexibility for multi-processor reset busing, while TPS3808G33DBVR trades third-rail capability for ultra-low power-making MAX6719UTZGD3+ optimal for complex multivoltage systems needing hardware-enforced sequencing and fault isolation.
Availability
MAX6719UTZGD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, portable medical devices, and industrial PLC controllers requiring stable component supply, long-lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6719UTZGD3+ 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 connectivity applications across industrial, automotive, and communications markets.
The MAX6715–MAX6729 family delivers compact, low-power supervisory solutions for multivoltage embedded systems-specifically engineered to replace discrete reset circuits while supporting flexible rail monitoring, watchdog safety, and robust noise immunity.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6719UTZGD3+?
The MAX6719UTZGD3+ has a factory-trimmed VCC1 reset threshold of 4.625V (±125mV), indicated by the 'Z' suffix in its part number per Maxim's Reset Voltage Threshold Suffix Guide. This value is guaranteed over -40°C to +85°C and features 20ppm/°C tempco for stable performance across temperature.
Does the MAX6719UTZGD3+ support monitoring a third voltage rail, and how is it configured?
Yes, the MAX6719UTZGD3+ supports third-rail monitoring via its RSTIN pin, which compares the applied voltage against an internal 626.5mV reference. To set a custom threshold (e.g., 1.2V), connect a resistor divider between the rail and ground with RSTIN at the midpoint-calculating R1/R2 using VEXT_TH = 626.5mV × ((R1 + R2)/R2).
What is the reset timeout period for the MAX6719UTZGD3+, and is it adjustable?
The MAX6719UTZGD3+ has a fixed minimum reset timeout period of 210ms, denoted by the 'D3' suffix. This duration is factory-programmed and not user-adjustable; it ensures sufficient hold time for CPU/FPGA initialization without requiring external timing components.
Is the MAX6719UTZGD3+ compatible with both 3.3V and 5V systems, and what are its supply voltage limits?
Yes, the MAX6719UTZGD3+ operates across VCC1 = 1.8V to 5.0V and VCC2 = 0.9V to 3.3V. Its absolute maximum ratings allow VCC1/VCC2 up to 5.5V, and reset output validity is guaranteed down to either supply reaching 0.8V-making it fully interoperable with mixed-voltage 3.3V/5V designs.
What type of reset output does the MAX6719UTZGD3+ provide, and what are its drive characteristics?
The MAX6719UTZGD3+ provides an active-low open-drain RST output referenced to VCC1. It sinks ≥1.2mA at VCC1 ≥ 2.7V (VOL ≤ 0.3V) and exhibits ≤0.5µA leakage when deasserted. An external pullup resistor is required-typically 10kΩ to VCC1 for standard CMOS interfacing.
MAX6719UTZGD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6719UTZGD3+ FAQ
1.How can I place an order for MAX6719UTZGD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719UTZGD3+ 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 MAX6719UTZGD3+ reliable?
The price and inventory of MAX6719UTZGD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719UTZGD3+ is usually 5 days.
3.What payment methods are accepted for MAX6719UTZGD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719UTZGD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719UTZGD3+?
MAX6719UTZGD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719UTZGD3+ 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 MAX6719UTZGD3+?
For technical support, including MAX6719UTZGD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719UTZGD3+ requirements.
6.How does Aetrix verify that MAX6719UTZGD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6719UTZGD3+ 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 MAX6719UTZGD3+ meets industry standards.
7.What is the process for return or replacement of MAX6719UTZGD3+?
All MAX6719UTZGD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719UTZGD3+, 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 MAX6719UTZGD3+ part is unused and in its original packaging.
Return procedure for MAX6719UTZGD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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