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Analog Devices Inc./Maxim Integrated MAX6719UTLTD1+T
- Part No.:
- MAX6719UTLTD1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6719UTLTD1+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6719UTLTD1+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 ≥1.1ms after any monitored supply falls below threshold or manual reset is triggered, and guarantees valid reset output down to VCC1 or VCC2 = 0.8V. It supports battery-powered telecom equipment requiring reliable power sequencing and brownout detection.
For engineers reviewing the MAX6719UTLTD1+T datasheet, MAX6719UTLTD1+T pinout, MAX6719UTLTD1+T application, or MAX6719UTLTD1+T equivalent, key selection criteria include dual-supply monitoring with third adjustable rail support, 1.1ms minimum reset timeout, open-drain RST output referenced to VCC1, guaranteed operation at 0.8V supply, and compatibility with low-power portable systems demanding <15µA quiescent current.
Technical Context
The MAX6719UTLTD1+T 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-gated fault detection across all three inputs and a monostable timeout circuit ensuring minimum 1.1ms assertion duration after recovery.
It features a high-impedance RSTIN input (±25nA leakage) enabling external resistor-divider configuration for custom thresholds down to 0.62V, and includes internal 50kΩ pullup on MR pin for manual reset initiation without external components. The device operates across -40°C to +85°C with guaranteed reset validity at VCC ≥ 0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed falling threshold; ensures reliable reset assertion during 5V rail brownout) |
| VCC2 Threshold | 3.075V (factory-trimmed falling threshold; matches common 3.3V I/O supply monitoring) |
| RSTIN Reference | 626.5mV (internal precision reference enabling third-rail monitoring via external divider) |
| Reset Timeout | 1.1ms min (guaranteed minimum assertion time prevents spurious release during supply recovery) |
| Supply Current | 14µA typ at 3.6V (enables multi-year battery life in always-on portable supervision applications) |
| Operating Temp | -40°C to +85°C (supports industrial and telecom equipment deployment without derating) |
| Reset Output | Open-drain RST (requires external pullup; allows level-shifting and wired-OR reset bus implementation) |
Pinout & Package
MAX6719UTLTD1+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), optimized for space-constrained PCB layouts in portable and networking gear.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output referenced to VCC1; asserts when any monitored supply drops below threshold or MR is pulled low |
| 2 | GND | Ground reference for all internal comparators and logic; must be low-impedance connection to system ground plane |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC1; initiates reset pulse on falling edge and holds for full timeout period |
| 4 | VCC2 | Secondary supply input powering comparator stage for VCC2 monitoring; also serves as reference for RST2 if present (not used in MAX6719) |
| 5 | RSTIN | High-impedance auxiliary voltage monitor input; compares applied voltage against 626.5mV internal reference to enable third-rail supervision |
| 6 | VCC1 | Primary supply input powering core logic and VCC1 comparator; defines reset output reference and enables operation down to 0.8V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage monitoring | Simultaneous supervision of VCC1 (4.625V), VCC2 (3.075V), and RSTIN (adjustable via resistor divider) eliminates need for multiple discrete supervisors |
| Guaranteed reset validity at 0.8V | Ensures deterministic reset behavior during deep brownout conditions where many supervisors fail, critical for safe shutdown in battery systems |
| 14µA typical supply current | Reduces standby power consumption by >50% vs. legacy supervisors, extending runtime in coin-cell–powered IoT sensors and wearables |
| Immunity to short VCC transients | Withstands ≤20µs negative glitches at 100mV overdrive without false reset, improving robustness in electrically noisy industrial environments |
| Factory-trimmed thresholds | ±1.5% accuracy on VCC1/VCC2 thresholds eliminates calibration overhead and reduces BOM count versus resistor-based solutions |
Applications
| Telecom Power Sequencing | Portable Medical Device Supervision |
|---|---|
Use Scenario: Monitoring 5V main rail, 3.3V interface rail, and 1.8V core rail in LTE base station remote radio units during cold start and load transients. IC Role / Device Role / Timing Role: Triple-rail supervisor asserting coordinated reset to FPGA, RF transceiver, and PMIC upon any rail deviation; 1.1ms timeout ensures stable power before release. Use Value: Prevents partial initialization and state corruption during asymmetric rail ramp-up, reducing field failure rate by eliminating race conditions in multi-rail power domains. |
Use Scenario: Ensuring safe boot and shutdown in handheld ECG monitors powered by single Li-ion cell with dynamically changing voltage profile. IC Role / Device Role / Timing Role: Supervising battery voltage (via RSTIN divider), 3.3V LDO output, and 1.2V MCU core supply; guarantees reset remains asserted until all rails exceed thresholds post-brownout. Use Value: Enables reliable low-voltage cutoff at 3.0V battery level while maintaining functional reset down to 0.8V VCC1, preventing data loss during gradual discharge. |
| Industrial PLC I/O Module | Set-Top Box Power Management |
Use Scenario: Detecting undervoltage on 24V DC input, isolated 5V logic rail, and 3.3V communication interface in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Dual-supply monitor with RSTIN used for auxiliary 12V auxiliary rail; open-drain RST drives optocoupled reset line to CPU and FPGA. Use Value: Eliminates need for external voltage dividers and comparators, reducing component count by 4 parts and PCB area by 12mm² per module. |
Use Scenario: Coordinating power-up sequence of SoC, DDR memory, and HDMI PHY in consumer set-top boxes with multi-stage DC-DC conversion. IC Role / Device Role / Timing Role: Monitoring 12V input, 5V intermediate rail, and 1.1V SoC core via RSTIN; 1.1ms timeout aligns with DDR initialization timing requirements. Use Value: Reduces boot failure rate by 92% compared to single-rail supervisors by catching intermediate rail collapse before SoC lockup occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTLTD1+T | Push-pull RST output instead of open-drain; identical thresholds, timeout, and pinout | Requires no external pullup; unsuitable for wired-OR reset buses or level translation | Select MAX6720UTLTD1+T when driving a single load directly and board space permits slightly higher drive strength |
| TPS3808G125DBVR | Dual-supply monitor only (no RSTIN); 1.25V fixed VDD threshold, 200ms timeout, SOT23-6 package | Lacks third-rail monitoring capability; requires separate circuit for auxiliary rail supervision | Choose TPS3808G125DBVR only when system has exactly two critical rails and cost is prioritized over feature completeness |
Compared with MAX6720UTLTD1+T and TPS3808G125DBVR, the MAX6719UTLTD1+T uniquely delivers open-drain reset compatibility with multi-drop buses and integrated third-rail monitoring-enabling single-chip supervision of complex multi-voltage systems without external components or layout compromises.
Availability
MAX6719UTLTD1+T is available at Aetrix Electronics and suitable for telecom infrastructure, portable medical devices, industrial PLCs, and consumer set-top boxes requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6719UTLTD1+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 connectivity in demanding industrial, automotive, and communications applications.
The MAX6715–MAX6729 family was engineered specifically for ultra-low-voltage, multi-rail microprocessor supervision in space- and power-constrained systems-delivering factory-trimmed accuracy, sub-15µA quiescent current, and guaranteed operation down to 0.8V supply.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6719UTLTD1+T?
The MAX6719UTLTD1+T has a factory-trimmed VCC1 reset threshold of 4.625V (typical falling threshold), with ±1.5% tolerance across temperature. This value is encoded in the "LT" suffix per Maxim's Reset Voltage Threshold Suffix Guide and is verified in the Electrical Characteristics table under VTH1 parameter for "L" and "T" codes.
Does the MAX6719UTLTD1+T support monitoring a third voltage rail, and how is it configured?
Yes, the MAX6719UTLTD1+T supports third-rail monitoring via its RSTIN pin, which compares the applied voltage against an internal 626.5mV reference. To configure, connect an external resistor divider from the target rail to GND, with the midpoint feeding RSTIN. The threshold is calculated as VEXT_TH = 626.5mV × (R1 + R2)/R2.
What is the reset timeout period for the MAX6719UTLTD1+T, and is it adjustable?
The MAX6719UTLTD1+T has a fixed minimum reset timeout period of 1.1ms, as indicated by the "D1" suffix in its part number. This value is not user-adjustable-it is factory-set and guaranteed across temperature and supply voltage. The timeout begins when all monitored supplies rise above their thresholds and ends after the full 1.1ms interval.
Is the reset output of the MAX6719UTLTD1+T push-pull or open-drain, and what are the implications?
The MAX6719UTLTD1+T features an open-drain RST output, requiring an external pullup resistor to VCC1 or another logic rail. This configuration enables wired-OR reset bus architectures, level shifting between different voltage domains, and compatibility with microprocessors having bidirectional reset pins-unlike push-pull variants such as MAX6720UTLTD1+T.
What is the minimum operating supply voltage for the MAX6719UTLTD1+T to guarantee valid reset output?
The MAX6719UTLTD1+T guarantees valid reset output logic state as long as either VCC1 or VCC2 remains greater than 0.8V. Below this level, reset behavior is not specified. This 0.8V guarantee enables reliable operation during deep brownout events common in battery-powered systems nearing end-of-life.
MAX6719UTLTD1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6719UTLTD1+T FAQ
1.How can I place an order for MAX6719UTLTD1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719UTLTD1+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 MAX6719UTLTD1+T reliable?
The price and inventory of MAX6719UTLTD1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719UTLTD1+T is usually 5 days.
3.What payment methods are accepted for MAX6719UTLTD1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719UTLTD1+T transactions.
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4.How is shipping managed for MAX6719UTLTD1+T?
MAX6719UTLTD1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719UTLTD1+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 MAX6719UTLTD1+T?
For technical support, including MAX6719UTLTD1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719UTLTD1+T requirements.
6.How does Aetrix verify that MAX6719UTLTD1+T is sourced from the original manufacturer or authorized distributors?
All MAX6719UTLTD1+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 MAX6719UTLTD1+T meets industry standards.
7.What is the process for return or replacement of MAX6719UTLTD1+T?
All MAX6719UTLTD1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719UTLTD1+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 MAX6719UTLTD1+T part is unused and in its original packaging.
Return procedure for MAX6719UTLTD1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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