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Analog Devices Inc./Maxim Integrated MAX6719UTZWD3+T
- Part No.:
- MAX6719UTZWD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719UTZWD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,144
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Product details
Overview
MAX6719UTZWD3+T 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 (35s startup / 1.12s normal timeout), and operates from -40°C to +85°C. It is used in multivoltage telecom power systems requiring reliable brownout detection and orderly processor recovery.
For engineers reviewing the MAX6719UTZWD3+T datasheet, MAX6719UTZWD3+T pinout, MAX6719UTZWD3+T application, or MAX6719UTZWD3+T equivalent, key selection criteria include confirmed triple-supply monitoring capability, factory-trimmed dual thresholds with external RSTIN flexibility, guaranteed reset validity down to VCC1/VCC2 = 0.8V, and compatibility with low-power battery-operated embedded designs requiring <15µA quiescent current.
Technical Context
The MAX6719UTZWD3+T implements independent voltage comparators for VCC1 and VCC2 with ±1.5% threshold accuracy and 20ppm/°C tempco, plus a high-impedance RSTIN input referenced to a 626.5mV internal bandgap. Its reset logic combines OR-ed fault conditions (VCC1/VCC2 undervoltage, RSTIN low, MR low) with a monolithic timeout counter ensuring minimum 210ms reset assertion after recovery.
It features a dual-mode watchdog: a 35s minimum initial timeout after power-up or reset, followed by a 1.12s minimum normal-mode timeout triggered by WDI edge transitions. The open-drain RST output is referenced to VCC1 and requires external pullup; no PFO or push-pull reset is present in this variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, falling edge; ensures reliable reset during 5V rail brownout) |
| VCC2 Threshold | 3.075V (factory-trimmed, falling edge; matches common 3.3V I/O supply tolerance) |
| RSTIN Reference | 626.5mV (internal precision bandgap; enables monitoring of auxiliary supplies ≥0.62V via resistor divider) |
| Reset Timeout | 210ms (minimum; guarantees sufficient processor hold time for full firmware initialization) |
| Supply Current | 14µA typical at 3.6V (enables >10-year battery life in always-on supervisory applications) |
| Operating Temp | -40°C to +85°C (supports industrial-grade deployment without derating) |
| Reset Validity | Down to VCC1 or VCC2 = 0.8V (ensures deterministic reset state during deep brownout) |
Pinout & Package
MAX6719UTZWD3+T uses a 6-pin SOT23 package (2.9mm × 1.6mm × 1.1mm) with gull-wing leads, RoHS-compliant lead-free finish (+T suffix), and thermal pad not electrically connected.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pullup to VCC1; asserts when any monitored supply fails or MR is pulled low |
| 2 | GND | Analog/digital ground reference; must be low-impedance connection to system ground plane |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC1 (50kΩ); debounced by 100ns glitch rejection |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal comparator for VCC2 monitoring and sets RST2 reference if present (not used in MAX6719) |
| 5 | WDI | Watchdog input; rising/falling edge resets 1.12s normal timeout; long idle (>35s) triggers reset after power-up |
| 6 | VCC1 | Primary supply input (1.8V–5.0V range); powers device core, references RST output, and sets VCC1 threshold comparator |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneous VCC1 (4.625V), VCC2 (3.075V), and RSTIN (626.5mV ref) supervision eliminates need for discrete comparators in multirail systems |
| Factory-trimmed thresholds | VCC1/VCC2 thresholds accurate to ±1.5% over temperature, removing calibration burden in production test |
| Dual-mode watchdog | 35s startup timeout allows full boot sequence completion before enabling 1.12s runtime monitoring - prevents false resets during initialization |
| Low-power operation | 14µA typical ICC at 3.6V enables integration into energy-harvesting or coin-cell-powered devices without compromising battery life |
| Brownout immunity | Guaranteed reset assertion validity down to VCC1 or VCC2 = 0.8V ensures deterministic behavior even during severe undervoltage events |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring primary 4.8V bias rail and secondary 3.3V logic rail in remote radio unit power management. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting reset to ARM Cortex-M7 MCU upon simultaneous or independent rail failure; RSTIN monitors auxiliary 1.2V FPGA core supply. Use Value: Prevents corrupted register writes during partial power loss, enabling automatic recovery without field technician intervention. |
Use Scenario: Ensuring safe startup/shutdown sequencing of 24V field bus interface and 5V microcontroller supply in DIN-rail mounted controller. IC Role / Device Role / Timing Role: Triple-voltage monitor triggering controlled reset of STM32H7 MCU when either main supply dips below spec or auxiliary sensor supply fails. Use Value: Eliminates need for external RC timing networks and discrete reset ICs, reducing BOM count by 3 components per module. |
| Medical Infusion Pump | Network Switch ASIC Power Management |
Use Scenario: Supervising 3.3V MCU supply, 1.8V display driver supply, and 0.9V ADC reference supply in battery-backed portable device. IC Role / Device Role / Timing Role: Low-quiescent-current triple supervisor providing fail-safe reset to safety-critical TI MSP432P401R MCU during lithium battery discharge. Use Value: 14µA supply current extends single-charge battery life beyond 18 months while maintaining Class III medical device reliability requirements. |
Use Scenario: Coordinating power-good sequencing across 12V intermediate bus, 3.3V PHY supply, and 1.0V ASIC core rail in 10G Ethernet switch. IC Role / Device Role / Timing Role: Triple-voltage supervisor with RSTIN monitoring auxiliary 1.2V PLL supply, asserting synchronized reset to Broadcom BCM56xx switch ASIC. Use Value: Replaces three discrete supervisors with one 6-pin SOT23, saving 12mm² PCB area and simplifying layout routing for high-speed signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTZWD3+T | Same pinout and triple-monitor function, but push-pull RST output instead of open-drain; higher drive strength (800µA sink/source) | Requires no external pullup; better suited for driving multiple loads or noisy environments where open-drain leakage may cause issues | Select MAX6720UTZWD3+T when driving reset lines with heavy capacitive load or when interfacing with processors requiring active-high reset polarity |
| TPS3808G33DBVR | Dual-supply monitor only (VDD1/VDD2); no RSTIN input; fixed 3.3V/3.3V thresholds; 200ms timeout; 2.5µA ICC | Lacks third-supply monitoring capability; suitable only for simpler dual-rail systems without auxiliary voltage requirements | Choose TPS3808G33DBVR for cost-sensitive dual-supply applications where RSTIN functionality is unnecessary and ultra-low ICC (<3µA) is critical |
Compared with MAX6719UTZWD3+T, MAX6720UTZWD3+T offers push-pull drive for direct MCU reset pin connection without pullup, while TPS3808G33DBVR reduces quiescent current by 82% but sacrifices RSTIN flexibility and third-supply monitoring - making it viable only for strictly dual-rail use cases.
Availability
MAX6719UTZWD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical infusion pumps requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for MAX6719UTZWD3+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, communications, and computing applications.
The MAX6715–MAX6729 family was designed specifically for space-constrained multivoltage systems needing reliable, low-power, factory-trimmed supervision - targeting applications where discrete solutions increase board area, cost, and failure risk.
FAQ
What are the exact reset threshold voltages for MAX6719UTZWD3+T?
The MAX6719UTZWD3+T has factory-trimmed VCC1 reset threshold of 4.625V (±1.5%) and VCC2 threshold of 3.075V (±1.5%), both specified on falling edges. These values are encoded in the "ZW" suffix per Maxim's Reset Voltage Threshold Suffix Guide and verified in the Electrical Characteristics table on page 2 of the datasheet.
Does MAX6719UTZWD3+T support power-fail monitoring (PFI/PFO)?
No, MAX6719UTZWD3+T does not include power-fail input (PFI) or output (PFO) functionality. According to the Selector Guide on page 14, only MAX6728/MAX6729 variants in the family provide PFI/PFO; MAX6719 is designated as a triple-supply supervisor with RSTIN but no PFI capability.
What is the function of the WDI pin on MAX6719UTZWD3+T?
The WDI (Watchdog Input) pin on MAX6719UTZWD3+T monitors microprocessor activity: a rising or falling edge clears the 1.12s normal watchdog timeout, while absence of transitions for >35s after reset triggers a new reset pulse. This dual-mode architecture ensures robust software execution monitoring without false timeouts during boot.
Can MAX6719UTZWD3+T operate with VCC1 = 1.8V and VCC2 = 1.2V?
Yes, MAX6719UTZWD3+T supports VCC1 from 1.8V to 5.0V and VCC2 from 0.9V to 3.3V per the General Description. Operation at 1.8V/1.2V is validated in the Typical Operating Characteristics plots (pages 5–6), and reset remains valid down to either supply = 0.8V, ensuring functional margin.
Is the RST output of MAX6719UTZWD3+T push-pull or open-drain?
The RST output of MAX6719UTZWD3+T is open-drain, as confirmed by the Pin Description table (page 7) and Selector Guide (page 14). It requires an external pullup resistor to VCC1 and cannot source current - unlike the push-pull RST variant found in MAX6720UTZWD3+T.
MAX6719UTZWD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.665V, 2.313V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6719UTZWD3+T FAQ
1.How can I place an order for MAX6719UTZWD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719UTZWD3+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 MAX6719UTZWD3+T reliable?
The price and inventory of MAX6719UTZWD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719UTZWD3+T is usually 5 days.
3.What payment methods are accepted for MAX6719UTZWD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719UTZWD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719UTZWD3+T?
MAX6719UTZWD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719UTZWD3+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 MAX6719UTZWD3+T?
For technical support, including MAX6719UTZWD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719UTZWD3+T requirements.
6.How does Aetrix verify that MAX6719UTZWD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6719UTZWD3+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 MAX6719UTZWD3+T meets industry standards.
7.What is the process for return or replacement of MAX6719UTZWD3+T?
All MAX6719UTZWD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719UTZWD3+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 MAX6719UTZWD3+T part is unused and in its original packaging.
Return procedure for MAX6719UTZWD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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