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Analog Devices Inc./Maxim Integrated MAX6719UTTGD3+T
- Part No.:
- MAX6719UTTGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719UTTGD3+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6719UTTGD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (adjustable third supply) with factory-trimmed thresholds of 4.625V and 3.075V, 210ms 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 reset coordination.
For engineers reviewing the MAX6719UTTGD3+T datasheet, MAX6719UTTGD3+T pinout, MAX6719UTTGD3+T application, or MAX6719UTTGD3+T equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), ultra-low 14µA supply current at 3.6V, RSTIN's 626.5mV internal reference for sub-1V auxiliary monitoring, and immunity to VCC transients <20µs at 100mV overdrive.
Technical Context
The MAX6719UTTGD3+T integrates three independent voltage comparators: one for VCC1 (4.625V ±1.5%), one for VCC2 (3.075V ±1.5%), and one for RSTIN referenced to a precision 626.5mV internal bandgap. Reset assertion occurs when any monitored voltage falls below its threshold, and reset remains active for a guaranteed minimum 210ms after all voltages recover.
It features an open-drain active-low RST output, manual reset input (MR) with 50kΩ internal pullup to VCC1, and no watchdog or power-fail functionality - distinguishing it from MAX6721–MAX6729 variants. The device operates across -40°C to +85°C and maintains valid reset logic state even as VCC1 or VCC2 drops to 0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (±1.5%) - sets primary supply brownout detection point for 5V rail monitoring |
| VCC2 Threshold | 3.075V (±1.5%) - enables accurate 3.3V secondary rail supervision with hysteresis |
| RSTIN Reference | 626.5mV (±2.5mV) - allows external resistor-divider to monitor third supply down to 0.62V |
| Reset Timeout | 210ms (min) - ensures sufficient hold time for processor initialization after power recovery |
| Supply Current | 14µA (typ @ 3.6V) - minimizes quiescent load on battery-backed or low-power systems |
| Operating Temp | -40°C to +85°C - supports industrial and telecom equipment deployment without derating |
| VCC Validity Limit | 0.8V - guarantees correct reset output state during deep brownout, enabling robust fail-safe behavior |
Pinout & Package
MAX6719UTTGD3+T uses a 6-pin SOT23-6 package with exposed pad (no thermal pad connection required). Pin 1 is RST (open-drain active-low reset output), Pin 2 is GND, Pin 3 is MR (active-low manual reset input), Pin 4 is VCC2 (secondary supply input), Pin 5 is VCC1 (primary supply input), and Pin 6 is RSTIN (adjustable reset comparator input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Open-drain active-low reset output | Drives low during fault; requires external pullup to VCC1 for logic-high level; asserts for ≥210ms after recovery |
| 2 (GND) | Ground reference | Common return for all internal comparators and reset timing circuitry |
| 3 (MR) | Active-low manual reset input | Pulled high internally to VCC1 via 50kΩ; pulling low forces reset for ≥210ms after release |
| 4 (VCC2) | Secondary supply input | Powers internal circuitry when > VCC1; monitored at 3.075V threshold with ±1.5% tolerance |
| 5 (VCC1) | Primary supply input | Main power source; monitored at 4.625V threshold; determines reset output reference and MR pullup |
| 6 (RSTIN) | Adjustable undervoltage monitor input | High-impedance node referenced to 626.5mV internal reference; enables third-rail monitoring via resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage thresholds | 4.625V (VCC1) and 3.075V (VCC2) with ±1.5% accuracy over -40°C to +85°C eliminates external resistor calibration |
| Externally adjustable third-voltage monitor | RSTIN input with 626.5mV internal reference enables precise monitoring of supplies as low as 0.62V using two external resistors |
| Guaranteed reset validity down to 0.8V | Ensures deterministic reset behavior during severe brownout conditions where VCC1 or VCC2 collapses near ground |
| Ultra-low quiescent current | 14µA typical at 3.6V reduces standby power in battery-operated or energy-sensitive applications |
| Immunity to short VCC transients | Rejects glitches <20µs wide at 100mV overdrive - prevents spurious resets in noisy power environments |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Dual-rail DC/DC converter system powering FPGA core (1.2V) and I/O (3.3V) with 5V bias rail, requiring coordinated reset during input voltage sag. IC Role / Device Role / Timing Role: MAX6719UTTGD3+T monitors 5V (VCC1), 3.3V (VCC2), and FPGA core rail (via RSTIN divider) to assert synchronized reset before logic corruption occurs. Use Value: Prevents partial configuration or metastability by holding reset until all rails exceed their precise thresholds and remain stable for 210ms. |
Use Scenario: Modular PLC backplane with hot-swappable I/O cards, each powered by isolated 24V-to-5V/3.3V converters subject to load-step-induced dips. IC Role / Device Role / Timing Role: Supervises main 5V and auxiliary 3.3V rails while using RSTIN to track isolated 5V domain integrity - triggers reset only on true undervoltage, not transient noise. Use Value: Eliminates false trips from switching noise or cable inductance spikes, improving field reliability without sacrificing response speed. |
| Medical Diagnostic Imaging Subsystem | Network Edge Router Line Card |
|
Use Scenario: CT scanner subsystem with analog front-end (2.5V), digital processing (1.8V), and control logic (3.3V), requiring fail-safe reset on any rail collapse. IC Role / Device Role / Timing Role: MAX6719UTTGD3+T monitors 3.3V (VCC1), 2.5V (VCC2), and 1.8V (via RSTIN) to guarantee atomic reset across mixed-signal domains. Use Value: Ensures deterministic state recovery across ADC, FPGA, and microcontroller - critical for FDA-compliant safety-critical operation. |
Use Scenario: 10G line card with SERDES (1.2V), PHY (2.5V), and management MCU (3.3V), where power sequencing must survive AC line sags and PSE-induced transients. IC Role / Device Role / Timing Role: Uses VCC1=3.3V, VCC2=2.5V, and RSTIN for 1.2V rail to enforce strict voltage ordering and prevent SERDES lockup during brownout recovery. Use Value: Maintains link integrity by asserting reset before SERDES enters undefined state, avoiding packet loss or hardware hang during grid instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTTGD3+T | Push-pull RST output instead of open-drain; identical thresholds, timeout, and RSTIN capability | Requires no external pullup; better suited for driving CMOS inputs directly but incompatible with wired-OR reset buses | Select MAX6720UTTGD3+T when driving single-load reset lines without bus sharing; retain MAX6719UTTGD3+T for shared reset nets |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); no RSTIN or VCC2 input; 200ms timeout; 1.6µA supply current | Lacks triple-monitoring capability; suitable only for single-rail systems where auxiliary rail monitoring is handled externally | Choose TPS3808G33DBVR only for cost-sensitive, single-rail designs; MAX6719UTTGD3+T remains necessary for true multivoltage coordination |
Compared with MAX6720UTTGD3+T and TPS3808G33DBVR, the MAX6719UTTGD3+T uniquely delivers open-drain reset compatibility with multi-drop buses, factory-trimmed dual thresholds, and RSTIN-based third-rail supervision - making it irreplaceable in systems requiring coordinated reset across three independent power domains.
Availability
MAX6719UTTGD3+T is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC I/O modules, medical diagnostic imaging subsystems, and network edge router line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MAX6719UTTGD3+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 in industrial, automotive, and communications markets.
The MAX6715–MAX6729 family was engineered specifically for multivoltage embedded systems needing compact, low-power, high-accuracy supervision of primary, secondary, and auxiliary rails - with emphasis on brownout immunity and guaranteed reset validity under deep undervoltage.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6719UTTGD3+T?
The MAX6719UTTGD3+T has factory-trimmed reset thresholds of 4.625V for VCC1 and 3.075V for VCC2, each with ±1.5% tolerance over the full -40°C to +85°C operating range. These values are encoded in the "TG" suffix per Maxim's Reset Voltage Threshold Suffix Guide and are confirmed in the Electrical Characteristics table on page 2 of the datasheet.
Does the MAX6719UTTGD3+T include a watchdog timer or power-fail functionality?
No, the MAX6719UTTGD3+T does not include watchdog timer or power-fail input/output functionality. Per the Selector Guide on page 14, it is designated as a triple-voltage supervisor with manual reset (MR) and adjustable RSTIN input only - unlike MAX6721–MAX6729 variants which add WDI or PFI/PFO. This makes MAX6719UTTGD3+T ideal for simpler, cost-optimized triple-rail supervision.
What is the function and voltage reference of the RSTIN pin on the MAX6719UTTGD3+T?
The RSTIN pin on the MAX6719UTTGD3+T is a high-impedance input referenced to an internal 626.5mV bandgap voltage. When the voltage at RSTIN falls below this reference, the device asserts reset. Users set the monitored supply's trip point using an external resistor divider - for example, a 1.2V rail can be scaled to 626.5mV using R1/R2 = 0.92.
What is the reset timeout period for the MAX6719UTTGD3+T, and is it guaranteed minimum or typical?
The MAX6719UTTGD3+T has a guaranteed minimum reset timeout period of 210ms, as indicated by the "D3" suffix in the part number per the Reset Timeout Period Suffix Guide. This value is specified in the Electrical Characteristics table (page 3) as tRP = 140ms (min) / 210ms (typ) / 280ms (max), confirming 210ms as the design-typical value with 140ms as the absolute minimum guarantee.
Can the MAX6719UTTGD3+T operate reliably when VCC1 or VCC2 drops below 1.0V?
Yes - the MAX6719UTTGD3+T is explicitly guaranteed to maintain correct reset output logic state down to VCC1 or VCC2 = 0.8V, as stated in the General Description and Electrical Characteristics sections. This ensures deterministic reset assertion during deep brownout events, unlike many supervisors that lose functionality below 1.0V.
MAX6719UTTGD3+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:
- 1.11V, 3.075V, 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
MAX6719UTTGD3+T FAQ
1.How can I place an order for MAX6719UTTGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719UTTGD3+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 MAX6719UTTGD3+T reliable?
The price and inventory of MAX6719UTTGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719UTTGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6719UTTGD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719UTTGD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719UTTGD3+T?
MAX6719UTTGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719UTTGD3+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 MAX6719UTTGD3+T?
For technical support, including MAX6719UTTGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719UTTGD3+T requirements.
6.How does Aetrix verify that MAX6719UTTGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6719UTTGD3+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 MAX6719UTTGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6719UTTGD3+T?
All MAX6719UTTGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719UTTGD3+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 MAX6719UTTGD3+T part is unused and in its original packaging.
Return procedure for MAX6719UTTGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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