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Analog Devices Inc./Maxim Integrated MAX6719UTZGD3
- Part No.:
- MAX6719UTZGD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719UTZGD3.pdf
- Description:
- IC SUPERVISOR UP SUP CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:430
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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 (primary), VCC2 (secondary), and RSTIN (adjustable third supply) with factory-trimmed thresholds of 4.625V and 3.075V, 210ms minimum reset timeout, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in multivoltage telecom power systems for reliable brownout detection and system initialization.
For engineers reviewing the MAX6719UTZGD3 datasheet, MAX6719UTZGD3 pinout, MAX6719UTZGD3 application, or MAX6719UTZGD3 equivalent, this page delivers verified electrical parameters, dual-supply threshold behavior, watchdog timing architecture, and real-world integration guidance for battery-operated and industrial embedded designs.
Technical Context
The MAX6719UTZGD3 implements independent voltage comparators for VCC1 and VCC2, plus an adjustable RSTIN input referenced to a 626.5mV internal bandgap, enabling precise monitoring of a third rail as low as 0.62V via external resistor divider. Its reset logic asserts active-low RST on any threshold violation and holds for a fixed 210ms timeout after recovery.
This device integrates manual reset (MR) with 50kΩ internal pullup, supports push-pull RST output referenced to VCC1, and features immunity to sub-20µs VCC transients - all while drawing only 14µA typical supply current at 3.6V across -40°C to +85°C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±1.5% over temp) - sets primary supply brownout point for 5V/3.3V system rails |
| VCC2 Threshold | 3.075V (factory-trimmed, ±1.5% over temp) - monitors secondary supply such as I/O or memory voltage |
| RSTIN Threshold | 626.5mV (internal reference) - enables externally adjustable third-voltage monitoring down to 0.62V |
| Reset Timeout | 210ms (minimum) - ensures sufficient hold time for µP boot sequence before release |
| Supply Current | 14µA (typ at 3.6V) - enables long battery life in portable equipment without compromising supervision fidelity |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom environments with no derating required |
| VCC Validity | Reset output guaranteed valid down to VCC1 or VCC2 = 0.8V - supports deep brownout detection before full power collapse |
Pinout & Package
MAX6719UTZGD3 uses a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm) with gull-wing leads, RoHS-compliant and available in lead-free (+T) variant. Pin 1 is marked with dot; pin order follows standard SOT23 orientation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts when any monitored supply drops below threshold or MR is pulled low |
| 2 | GND | Analog/digital ground reference for all internal comparators and logic; must be low-impedance connection |
| 3 | MR | Active-low manual reset input with 50kΩ internal pullup to VCC1; pulse ≥1µs forces reset regardless of supply status |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal circuitry when > VCC1 and sets VCC2 threshold comparator reference |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers device when > VCC2 and defines main reset threshold and RST output drive level |
| 6 | RSTIN | Adjustable undervoltage monitor input; high-impedance node referenced to 626.5mV internal reference for third-rail monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage thresholds | Enables precise, temperature-stable monitoring of primary (4.625V) and secondary (3.075V) rails without external resistors |
| Externally adjustable RSTIN input | Supports third-voltage supervision down to 0.62V using simple resistor divider - critical for core voltage or auxiliary rail tracking |
| Push-pull RST output | Eliminates need for external pullup resistor; drives high to 0.8×VCC1, low to ≤0.4V at 3.2mA sink - simplifies interface to µP reset pins |
| Guaranteed reset validity to 0.8V | Ensures deterministic reset assertion even during severe brownout conditions where VCC collapses below 1.0V |
| Low 14µA supply current | Reduces quiescent power in always-on supervision circuits - essential for battery-backed systems and energy-sensitive IoT nodes |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Monitoring dual DC/DC outputs (5V and 3.3V) in telecom line cards during hot-swap insertion and AC brownouts. IC Role / Device Role / Timing Role: Supervisory IC asserting reset if either rail dips below threshold, holding reset for 210ms to prevent partial initialization. Use Value: Prevents firmware corruption by ensuring µP remains held in reset until both supplies stabilize within spec. |
Use Scenario: Ensuring safe startup and fault recovery in programmable logic controller backplanes with mixed 24V, 5V, and 3.3V domains. IC Role / Device Role / Timing Role: Triple-monitoring supervisor verifying primary (24V-derived 5V), secondary (3.3V logic), and auxiliary (1.8V FPGA core) rails. Use Value: Enables single-chip validation of three critical rails - reducing BOM count vs. discrete supervisors and improving board-level reliability. |
| Portable Medical Devices | Set-Top Box Power Management |
|
Use Scenario: Battery-powered ultrasound handhelds requiring fail-safe reset during Li-ion voltage sag under load. IC Role / Device Role / Timing Role: Monitors main 3.3V rail and backup 1.8V sensor supply, with RSTIN configured for battery voltage (via divider) to trigger early shutdown. Use Value: Extends usable battery life by allowing operation down to 3.0V main rail while preemptively resetting before data loss occurs. |
Use Scenario: Consumer STB platforms with multiple isolated power domains (HDMI, tuner, SoC core) needing coordinated reset sequencing. IC Role / Device Role / Timing Role: Dual-supply supervisor validating 12V (analog front-end) and 3.3V (digital subsystem), with MR tied to front-panel reset button. Use Value: Guarantees clean power-up of HDMI PHY and SoC simultaneously - eliminating handshake failures and EDID read errors. |
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 pinout and thresholds, but open-drain RST output instead of push-pull | Requires external pullup resistor; less suitable for direct µP reset pin drive without level-shifting | Select MAX6720UTZGD3 only when interfacing to legacy µPs requiring open-drain reset or when driving multiple loads via wired-OR |
| TPS3808G33DBVR | Single-supply monitor (3.3V only), no RSTIN input, 200ms timeout, 1.6µA quiescent current | Lacks dual/threshold flexibility and third-rail monitoring - insufficient for multivoltage systems | Choose TPS3808G33DBVR only for cost-sensitive single-rail applications where RSTIN and VCC2 monitoring are unnecessary |
Compared with MAX6719UTZGD3, MAX6720UTZGD3 offers identical supervision functionality but requires external pullup for RST, while TPS3808G33DBVR reduces cost and current draw at the expense of triple-voltage capability - making MAX6719UTZGD3 the only option supporting simultaneous VCC1/VCC2/RSTIN monitoring in a 6-pin SOT23.
Availability
MAX6719UTZGD3 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and portable medical devices requiring stable component supply, long-lifecycle support, and guaranteed factory-trimmed voltage thresholds.
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 interface applications - with leadership in supervisory, PMIC, and data-conversion solutions.
The MAX6715–MAX6729 family was engineered specifically for space-constrained multivoltage systems requiring ultra-low quiescent current, guaranteed reset validity at sub-1V supplies, and flexible triple-rail monitoring - targeting telecom, industrial, and portable equipment.
FAQ
What are the exact factory-trimmed reset thresholds for MAX6719UTZGD3?
The MAX6719UTZGD3 has factory-trimmed VCC1 and VCC2 reset thresholds of 4.625V and 3.075V respectively, with ±1.5% tolerance over -40°C to +85°C. These values are encoded in the "ZG" suffix per Maxim's Reset Voltage Threshold Suffix Guide and are laser-trimmed during production - no external resistor calibration is needed for these rails.
Does MAX6719UTZGD3 support watchdog functionality?
No, MAX6719UTZGD3 does not include a watchdog timer. Per Maxim's Selector Guide, watchdog input (WDI) is only available on MAX6721–MAX6729 variants. The MAX6719UTZGD3 provides triple-voltage supervision (VCC1, VCC2, RSTIN), manual reset (MR), and push-pull RST output - but no watchdog monitoring capability.
What is the reset timeout period of MAX6719UTZGD3 and how is it set?
The MAX6719UTZGD3 has a 210ms minimum reset timeout period, indicated by the "D3" suffix in its part number. This value is fixed and factory-programmed - not adjustable via external components. The timeout begins when all monitored supplies rise above their thresholds and ends 210ms later, ensuring µP reset release occurs only after stable power is confirmed.
Can MAX6719UTZGD3 monitor a negative supply voltage?
Yes, MAX6719UTZGD3 can monitor negative supplies using the RSTIN input with an appropriate resistor-divider network that references the 626.5mV internal threshold. As described in Maxim's Application Information section, connecting RSTIN to a divider from a negative rail allows detection of negative voltage collapse - with PFO functionality unavailable since MAX6719 lacks PFI/PFO pins.
Is MAX6719UTZGD3 pin-compatible with other devices in the MAX6715–MAX6729 family?
MAX6719UTZGD3 is pin-compatible with other 6-pin SOT23 variants in the family (e.g., MAX6715UTxxDx, MAX6716UTxxDx, MAX6720UTxxDx), sharing identical pin 1–6 assignments. However, functional differences exist: MAX6719UTZGD3 provides RSTIN input and push-pull RST, whereas MAX6715 lacks RSTIN and MAX6720 has open-drain RST - requiring schematic review before substitution.
MAX6719UTZGD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.11V, 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-23-6
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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