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Analog Devices Inc./Maxim Integrated MAX6709NUB+
- Part No.:
- MAX6709NUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6709NUB+.pdf
- Description:
- IC VOLT MONITOR QUAD 10-UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,328
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Product details
Overview
The MAX6709NUB+ from Maxim Integrated is a low-power, quad voltage monitor IC designed for multivoltage system supervision. It provides four independent active-low open-drain power-good outputs (PWRGD1–PWRGD4), monitors adjustable thresholds down to 0.62V via external resistor dividers, operates from 2.0V to 5.5V supply, consumes only 35µA typical supply current, and features ±2.0% threshold accuracy across –40°C to +85°C - used in desktop/notebook computers and data storage equipment for reliable power sequencing and fault detection.
For engineers reviewing the MAX6709NUB+ datasheet, MAX6709NUB+ pinout, MAX6709NUB+ application, or MAX6709NUB+ equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options - all grounded in Maxim's official specifications for the MAX6709NUB+ variant with 5% tolerance on IN2 (3.0V nominal) and adjustable thresholds on IN1, IN3, and IN4.
Technical Context
The MAX6709NUB+ implements four precision comparators with an internal 0.62V bandgap reference and factory-trimmed resistor-divider networks for fixed thresholds; its adjustable inputs (IN1/IN3/IN4) bypass those networks and accept externally scaled voltages. Each comparator includes built-in 0.3% threshold hysteresis to reject noise without external components.
All four PWRGD outputs are open-drain with 10µA internal pullup to VCC, enabling wire-ORed power-good signaling. An undervoltage lockout circuit forces all outputs low when VCC drops below 2.0V, ensuring deterministic behavior down to 1V operation per test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 5.5V - supports direct connection to common logic rails without level-shifting. |
| Supply Current (typ) | 35µA at VCC = 5V - enables always-on monitoring in battery-backed or low-power systems. |
| Threshold Accuracy | ±2.0% over –40°C to +85°C - ensures reliable trip points across industrial temperature range. |
| Adjustable Threshold | 0.62V internal reference - allows monitoring of any input ≥0.62V using external resistor divider. |
| Output Type | Four independent active-low open-drain outputs with 10µA internal pullup - simplifies interface to diverse logic families and enables wired-AND power-good aggregation. |
| Input Tolerance Option | 5% trip threshold for IN2 (3.0V nominal) - matches standard 3.0V supply tolerance requirements. |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial and computing environments. |
Pinout & Package
The MAX6709NUB+ is housed in a 10-pin µMAX package (3.0mm × 3.0mm, 0.6mm height), lead-free, with exposed pad for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN1 | Adjustable voltage monitor input - connects to external resistor divider for custom threshold ≥0.62V. |
| 2 | IN2 | Fixed 3.0V nominal monitor input with 5% tolerance - asserts PWRGD2 low if voltage falls below 2.85V. |
| 3 | IN3 | Adjustable voltage monitor input - connects to external resistor divider for custom threshold ≥0.62V. |
| 4 | IN4 | Adjustable voltage monitor input - connects to external resistor divider for custom threshold ≥0.62V. |
| 5 | GND | Analog/digital ground reference - must be low-impedance connection for stable comparator operation. |
| 6 | PWRGD4 | Active-low open-drain output - sinks current when IN4 falls below threshold; 10µA internal pullup to VCC. |
| 7 | PWRGD3 | Active-low open-drain output - sinks current when IN3 falls below threshold; 10µA internal pullup to VCC. |
| 8 | PWRGD2 | Active-low open-drain output - sinks current when IN2 falls below 2.85V; 10µA internal pullup to VCC. |
| 9 | PWRGD1 | Active-low open-drain output - sinks current when IN1 falls below threshold; 10µA internal pullup to VCC. |
| 10 | VCC | Power supply input - powers internal circuitry; undervoltage lockout disables all outputs below 2.0V. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four separate comparator channels enable concurrent supervision of mixed-voltage rails (e.g., 3.0V core + three adjustable supplies). |
| Factory-trimmed thresholds | IN2 preset to 3.0V ±5% eliminates calibration effort and external resistors for that rail. |
| Adjustable inputs (3×) | IN1/IN3/IN4 accept scalable thresholds via resistor dividers - supports monitoring of 0.62V to >5.5V supplies. |
| Low quiescent current | 35µA typical ICC allows integration into always-on supervisory circuits without impacting system power budget. |
| Built-in hysteresis | 0.3% of threshold voltage prevents chatter during slow or noisy supply transitions - no external feedback required. |
Applications
| Desktop & Notebook Computers | Data Storage Equipment |
|---|---|
Use Scenario: Monitoring CPU core (3.0V), memory I/O, PCIe auxiliary, and standby rails during boot and runtime. IC Role / Device Role / Timing Role: Quad voltage monitor providing independent PWRGD signals to chipset or PMIC for sequenced power-up and fault isolation. Use Value: Enables deterministic power sequencing and immediate fault reporting without adding discrete comparators or microcontroller overhead. | Use Scenario: Supervising multiple voltage domains in SAS/SATA SSD controllers and RAID enclosures (e.g., 3.3V analog, 1.8V I/O, 1.2V core, adjustable bias). IC Role / Device Role / Timing Role: Centralized power-good arbiter feeding status to FPGA or host controller for safe initialization and hot-swap readiness. Use Value: Reduces BOM count by replacing four discrete supervisors while maintaining rail-specific trip accuracy and noise immunity. |
| Telecommunications Systems | High-End Printers |
Use Scenario: Validating isolated DC/DC outputs powering DSPs, PHYs, and management ASICs in base station line cards. IC Role / Device Role / Timing Role: Fault-detection node asserting system reset or alarm when any monitored rail deviates beyond 5% tolerance. Use Value: Ensures compliance with GR-63-CORE reliability requirements through accurate, temperature-stable thresholding. | Use Scenario: Verifying heater, motor driver, logic, and sensor supply integrity in multifunction printer mainboards. IC Role / Device Role / Timing Role: Real-time power-health indicator feeding status to print engine controller for graceful shutdown on rail failure. Use Value: Prevents print head damage or firmware corruption by halting operations within microseconds of undervoltage detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6705NPA+ | 3-input monitor with manual reset; no adjustable inputs; 5.0V/3.3V/2.5V fixed thresholds only. | Lacks IN1/IN3/IN4 adjustability and 3.0V option - unsuitable for designs requiring flexible rail monitoring. | Select MAX6705NPA+ only if exactly three fixed-rail monitoring is sufficient and 3.0V support is not needed. |
| TPS3307-33DGNR | Triple voltage supervisor (3.3V/3.3V/3.3V); no adjustable inputs; 200ms reset timeout; higher ICC (80µA). | Cannot replace quad monitoring or adjustable thresholds; requires external components for non-3.3V rails. | Choose TPS3307-33DGNR only for cost-sensitive 3.3V-only systems where fourth rail is handled separately. |
Compared with MAX6709NUB+, MAX6705NPA+ offers fewer inputs and no adjustability, limiting flexibility in multivoltage designs; TPS3307-33DGNR provides triple 3.3V monitoring but lacks the 3.0V ±5% channel and adjustable capability essential for heterogeneous supply supervision.
Availability
MAX6709NUB+ is available at Aetrix Electronics and suitable for desktop and notebook computers, data storage equipment, and telecommunications systems requiring stable component supply, long-term lifecycle support, and guaranteed lead-free packaging.
Supply support for MAX6709NUB+ 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 industrial, computing, and communications markets.
The MAX6709NUB+ belongs to Maxim's precision voltage supervisor product line, engineered specifically for multivoltage system power integrity assurance in space-constrained, thermally demanding applications.
FAQ
What is the exact threshold voltage and tolerance for IN2 on the MAX6709NUB+?
The MAX6709NUB+ has IN2 configured for 3.0V nominal monitoring with 5% tolerance, meaning it asserts PWRGD2 low when the input falls below 2.85V. This is confirmed in Maxim's Selector Guide for MAX6709NUB+, where "N" denotes 5% tolerance on the second input. The threshold is factory-trimmed and specified with ±2.0% accuracy over temperature.
Does the MAX6709NUB+ include a reset timer or manual reset input?
No, the MAX6709NUB+ does not include a reset timer or manual reset (MR) input. Those features are exclusive to the MAX6714 family. The MAX6709NUB+ provides only four independent PWRGD outputs with no integrated timing or MR functionality - it is a pure quad voltage monitor without reset generation capability.
Can the MAX6709NUB+ monitor a 1.2V supply?
Yes, the MAX6709NUB+ can monitor a 1.2V supply using any of its three adjustable inputs (IN1, IN3, or IN4). With the internal 0.62V reference, a resistor divider scaling 1.2V down to 0.62V (e.g., R1/R2 ≈ 0.94) enables precise detection. The device's ±2.0% threshold accuracy ensures reliable 1.2V supervision across temperature.
What is the maximum sink current supported by each PWRGD output of the MAX6709NUB+?
Each PWRGD output of the MAX6709NUB+ is rated to sink up to 2mA while maintaining VOL ≤ 0.3V at VCC = 5V, per the Electrical Characteristics table. At lower VCC (e.g., 2.5V), it sustains 1.2mA sink with the same VOL limit. The 10µA internal pullup remains active regardless of sink load.
Is the MAX6709NUB+ pin-compatible with other MAX6709 variants like MAX6709AUB+?
Yes, all MAX6709 variants including MAX6709NUB+ share identical 10-pin µMAX pinout and footprint. Differences lie solely in factory-configured threshold voltages and tolerances (e.g., IN2 = 3.0V ±5% for N vs. 2.5V ±10% for A), not in connectivity or electrical interface - enabling drop-in replacement within the same package.
MAX6709NUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 2.78V, Adj, Adj, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- <1ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX6709NUB+ FAQ
1.How can I place an order for MAX6709NUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6709NUB+ 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 MAX6709NUB+ reliable?
The price and inventory of MAX6709NUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6709NUB+ is usually 5 days.
3.What payment methods are accepted for MAX6709NUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6709NUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6709NUB+?
MAX6709NUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6709NUB+ 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 MAX6709NUB+?
For technical support, including MAX6709NUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6709NUB+ requirements.
6.How does Aetrix verify that MAX6709NUB+ is sourced from the original manufacturer or authorized distributors?
All MAX6709NUB+ 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 MAX6709NUB+ meets industry standards.
7.What is the process for return or replacement of MAX6709NUB+?
All MAX6709NUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6709NUB+, 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 MAX6709NUB+ part is unused and in its original packaging.
Return procedure for MAX6709NUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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