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Analog Devices Inc./Maxim Integrated MAX6709MUB
- Part No.:
- MAX6709MUB
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6709MUB.pdf
- Description:
- IC SUPERVISOR QUAD VOLT MONITOR
- Quantity:
- Payment:
- Shipping:
Inventory:1,417
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Product details
Overview
The MAX6709MUB from Maxim Integrated is a low-power, quad voltage monitor IC designed for multivoltage system supervision. It provides four independent, active-low open-drain outputs with 10µA internal pullup to VCC, monitors up to four supplies-including one at 3.0V nominal with ±10% tolerance-and operates from 2.0V to 5.5V supply while consuming only 35µA typical supply current. It is used in desktop computers and networking equipment for power-good signaling and undervoltage detection.
For engineers reviewing the MAX6709MUB datasheet, MAX6709MUB pinout, MAX6709MUB application, or MAX6709MUB equivalent, this device supports precise, component-free monitoring of mixed-supply rails (e.g., 3.0V, adjustable thresholds), delivers stable reset behavior across –40°C to +85°C, and integrates factory-trimmed thresholds with ±2.0% accuracy and 60ppm/°C temperature coefficient.
Technical Context
The MAX6709MUB implements four independent high-input-impedance comparators referenced to an internal bandgap, each paired with a factory-trimmed resistor-divider network for fixed-threshold monitoring or direct input for adjustable thresholds down to 0.62V. Its IN2 input is configured for 3.0V nominal with –10% trip threshold (2.70V min), while IN1, IN3, and IN4 are adjustable via external resistor dividers.
An internal undervoltage lockout circuit forces all PWRGD_ outputs low when VCC drops below 2.0V, and all outputs feature weak 10µA internal pullups to VCC-enabling wire-ORed power-good signals without external components. Hysteresis is built-in at 0.3×VTH, eliminating need for external feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 5.5V - supports direct connection to monitored rails including 3.3V and 5V logic domains. |
| Supply Current (typ) | 35µA at VCC = 5V - enables always-on supervision in battery-backed or low-power systems. |
| IN2 Threshold (nominal) | 3.0V with –10% tolerance (2.70V min) - matches common 3.0V supply tolerance specs without external calibration. |
| Adjustable Threshold Range | Down to 0.609V (min) - allows monitoring of sub-1V rails (e.g., core voltages) using external resistor dividers. |
| Threshold Accuracy | ±2.0% over –40°C to +85°C - ensures reliable trip points across industrial temperature range. |
| Temperature Coefficient | 60ppm/°C - limits drift to <±0.05% over full temperature range, critical for long-term stability. |
| Output Type | Four independent active-low open-drain outputs with 10µA internal pullup - simplifies interface to varied logic families and supports wired-OR configuration. |
Pinout & Package
MAX6709MUB is housed in a 10-pin µMAX package (3mm × 3mm, 0.6mm height), RoHS-compliant, with exposed pad for thermal performance. Pinout follows standard top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN1 | Adjustable voltage monitor input - connects to external resistor divider for custom threshold (e.g., 1.8V, 2.5V, or other). |
| 2 | IN2 | Fixed 3.0V monitor input with –10% trip threshold (2.70V) - dedicated to 3.0V rail supervision per MAX6709MUB selector guide. |
| 3 | IN3 | Adjustable voltage monitor input - supports additional custom rail monitoring (e.g., 1.2V core supply). |
| 4 | IN4 | Adjustable voltage monitor input - enables fourth independent threshold setting, e.g., for auxiliary or backup supply. |
| 5 | GND | Analog/digital ground reference - shared return for all comparators and internal reference. |
| 6 | PWRGD4 | Active-low open-drain output for IN4 - asserts low when IN4 falls below its threshold; 10µA internal pullup to VCC. |
| 7 | PWRGD3 | Active-low open-drain output for IN3 - provides dedicated power-good signal for third monitored rail. |
| 8 | PWRGD2 | Active-low open-drain output for IN2 - signals fault on 3.0V rail; synchronized with internal 3.0V–10% threshold. |
| 9 | PWRGD1 | Active-low open-drain output for IN1 - delivers power-good status for first adjustable rail. |
| 10 | VCC | Power supply input (2.0V–5.5V) - powers internal circuitry and serves as pullup source for all open-drain outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four separate comparator channels allow concurrent supervision of heterogeneous supply rails (e.g., 3.0V, 1.8V, 2.5V, 1.2V) without cross-coupling or timing interaction. |
| Factory-trimmed 3.0V input (IN2) | Guaranteed –10% trip threshold (2.70V min) eliminates need for external resistors or calibration when supervising standard 3.0V supplies. |
| Adjustable inputs (IN1/IN3/IN4) | Each accepts external resistor divider to set threshold from 0.609V to >5.5V - supports legacy and emerging low-voltage domains. |
| Integrated 60ppm/°C reference | Bandgap-based reference ensures <±0.05% threshold drift over –40°C to +85°C - critical for telecom and industrial uptime. |
| Wire-OR compatible outputs | All four PWRGD_ outputs have 10µA internal pullups and tolerate external pullups to any voltage ≤5.5V - enables single-system power-good bus without level shifters. |
Applications
| Desktop Computer Power Sequencing | Industrial PLC I/O Module Supervision |
|---|---|
|
Use Scenario: Monitoring 3.0V main logic rail, 1.8V memory interface, 2.5V analog subsystem, and 1.2V FPGA core in a multi-rail ATX-compatible motherboard. IC Role / Device Role / Timing Role: MAX6709MUB provides independent, simultaneous power-good assertions for each rail; IN2 directly supervises 3.0V, while IN1/IN3/IN4 use resistor dividers for remaining rails. Use Value: Eliminates four discrete supervisor ICs and associated passives, reducing BOM count by >12 components and PCB area by ~25mm². |
Use Scenario: Ensuring safe startup and fault response in a modular PLC backplane where field I/O modules draw from isolated 3.0V, 5.0V, ±12V, and 24V rails. IC Role / Device Role / Timing Role: MAX6709MUB's IN2 monitors the 3.0V logic rail; IN1/IN3/IN4 supervise derived analog, communication, and auxiliary rails via adjustable thresholds. Use Value: Enables deterministic power-up sequencing and immediate fault isolation - if any rail fails, corresponding PWRGD_ output pulls low within 5µs propagation delay. |
| Telecom Line Card Voltage Integrity | Network Switch ASIC Core Supply Monitoring |
|
Use Scenario: Verifying stable operation of DSP, PHY, and management MCU supplies (3.0V, 1.8V, 1.2V, 0.9V) on a carrier-grade line card before enabling data path. IC Role / Device Role / Timing Role: MAX6709MUB acts as centralized voltage integrity checker; IN2 handles 3.0V, others scaled via precision dividers for sub-1V rails. Use Value: Prevents ASIC latch-up or firmware corruption by asserting individual PWRGD_ signals only after all rails settle within ±10% tolerance - verified over –40°C to +85°C. |
Use Scenario: Supervising 3.0V I/O, 1.8V SerDes, 1.2V CPU core, and 0.85V GPU core supplies in a 10G Ethernet switch ASIC subsystem. IC Role / Device Role / Timing Role: MAX6709MUB's four outputs feed FPGA-configurable logic to gate clock enables and reset release - IN2 directly validates 3.0V, others support fine-grained core monitoring. Use Value: Achieves <100ms total power-good validation time with no software overhead - critical for rapid link recovery in carrier networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6710MUB | Same pinout and package; differs only in IN2 threshold tolerance (–5% vs. –10% for MAX6709MUB). | Used where 3.0V supply has tighter ±5% regulation spec; requires no layout change but may false-trigger on looser-tolerance rails. | Select MAX6710MUB only if system-level 3.0V rail is guaranteed ≤±5% deviation; otherwise MAX6709MUB's –10% margin improves robustness. |
| TPS3307-33D | Triple-monitor IC (not quad); 3.3V fixed input + two adjustable; no 3.0V option; higher 65µA supply current. | Lacks native 3.0V monitoring - requires external divider for 3.0V rail, adding error and component count; unsuitable for strict quad-rail validation. | Only consider if exactly three rails must be supervised and 3.0V rail is absent; MAX6709MUB remains sole drop-in solution for true 3.0V+three-adjustable quad monitoring. |
Compared with MAX6710MUB, MAX6709MUB offers wider 3.0V trip hysteresis (–10% vs. –5%), improving noise immunity in noisy industrial environments; compared with TPS3307-33D, it delivers true quad independence and lower quiescent current, making it optimal for space- and power-constrained multirail systems.
Availability
MAX6709MUB is available at Aetrix Electronics and suitable for desktop computers, industrial PLCs, and telecom line cards requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX6709MUB 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 demanding industrial, computing, and communications applications.
The MAX6709 series belongs to Maxim's power-supervisory product line, engineered specifically for multivoltage system integrity - delivering accurate, low-power, and pin-compatible voltage monitoring across diverse computing and infrastructure platforms.
FAQ
What is the exact trip threshold voltage for the IN2 input on MAX6709MUB?
The IN2 input on MAX6709MUB is factory-configured for a 3.0V nominal supply with –10% tolerance, resulting in a guaranteed minimum trip threshold of 2.70V (typical 2.78V, maximum 2.85V). This value is specified in the Electrical Characteristics table under "3.0V (–10%)" and applies across –40°C to +85°C. The MAX6709MUB datasheet confirms this threshold is trimmed and tested, not derived from external components.
Does MAX6709MUB require external pullup resistors on its PWRGD outputs?
No, MAX6709MUB does not require external pullup resistors: each PWRGD_ output features a 10µA internal current-source pullup to VCC. These internal pullups fully support standard CMOS/TTL logic interfacing. External pullups are optional - only needed when driving logic referenced to a voltage other than VCC (e.g., 1.8V or 3.3V IO domains), and even then, internal circuitry prevents reverse current flow into VCC.
Can MAX6709MUB monitor a 1.2V supply rail?
Yes, MAX6709MUB can monitor a 1.2V supply rail using any of its three adjustable inputs (IN1, IN3, or IN4). By connecting an external resistor divider between the 1.2V rail and GND, the divided voltage is scaled to match the device's internal 0.623V threshold. For example, R1 = 100kΩ and R2 = 107kΩ yields VIN = 0.623V at 1.2V input - confirmed in the Applications Information section of the MAX6709MUB datasheet.
What is the propagation delay of MAX6709MUB when detecting an undervoltage event?
The MAX6709MUB exhibits a typical propagation delay of 5µs (maximum 30µs) from input voltage crossing the threshold to corresponding PWRGD_ output assertion, measured with 10mV/µs slew rate and 100mV overdrive. This delay is consistent across all four channels and is specified in the Electrical Characteristics table under "Propagation Delay (tPD)". It enables fast fault response in real-time systems such as network switches and PLCs.
Is MAX6709MUB compatible with lead-free PCB assembly processes?
Yes, MAX6709MUB is available in RoHS-compliant, lead-free packaging - indicated by the "+" suffix (e.g., MAX6709MUB+). Its µMAX package is rated for standard lead-free reflow profiles, including peak temperatures up to 260°C. The device's absolute maximum junction temperature of +150°C and thermal design (exposed pad variant U10+2*) ensure reliability during Pb-free soldering, as documented in Maxim's package information and materials analysis reports.
MAX6709MUB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 2.63V, Adj, Adj, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX
MAX6709MUB FAQ
1.How can I place an order for MAX6709MUB through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6709MUB 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 MAX6709MUB reliable?
The price and inventory of MAX6709MUB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6709MUB is usually 5 days.
3.What payment methods are accepted for MAX6709MUB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6709MUB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6709MUB?
MAX6709MUB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6709MUB 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 MAX6709MUB?
For technical support, including MAX6709MUB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6709MUB requirements.
6.How does Aetrix verify that MAX6709MUB is sourced from the original manufacturer or authorized distributors?
All MAX6709MUB 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 MAX6709MUB meets industry standards.
7.What is the process for return or replacement of MAX6709MUB?
All MAX6709MUB units undergo pre-shipment inspection (PSI). If there is an issue with MAX6709MUB, 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 MAX6709MUB part is unused and in its original packaging.
Return procedure for MAX6709MUB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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