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Analog Devices Inc./Maxim Integrated MAX6709DUB+T
- Part No.:
- MAX6709DUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6709DUB+T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,262
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Product details
Overview
The MAX6709DUB+T from Maxim Integrated is a quad voltage monitor IC designed for multivoltage system supervision, featuring four independent active-low open-drain power-good outputs (PWRGD1–PWRGD4), factory-trimmed thresholds for 5.0V, 3.3V, and 1.8V nominal supplies with ±5% tolerance, 35µA typical supply current, and operation from 2.0V to 5.5V VCC. It is used in desktop/notebook computers and servers to validate power-rail sequencing and assert system-ready signals.
For engineers reviewing the MAX6709DUB+T datasheet, MAX6709DUB+T pinout, MAX6709DUB+T application, or MAX6709DUB+T equivalent, this page delivers verified electrical parameters, µMAX package layout, real-world multivoltage monitoring use cases, and validated alternative options - all confirmed against Maxim's official documentation and selector guide.
Technical Context
The MAX6709DUB+T implements four precision comparators with an internal 0.62V bandgap reference and factory-laser-trimmed resistor-divider networks to set fixed thresholds for IN1 = 5.0V, IN2 = 3.3V, and IN3 = 1.8V (all ±5%), while IN4 supports adjustable monitoring down to 0.62V via external divider. Each comparator drives a dedicated open-drain output with 10µA internal pullup to VCC.
No reset timing circuitry or manual reset input is present - unlike the MAX6714 family - confirming its role strictly as a quad power-good monitor without integrated reset generation. Undervoltage lockout forces all PWRGD_ outputs low when VCC drops below 2.0V, and hysteresis is built-in at 0.3×VTH to prevent noise-induced chatter.
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 systems without level-shifting. |
| Supply Current (typ) | 35µA at VCC = 5V - enables always-on supervision in battery-backed or low-power embedded systems. |
| Threshold Accuracy | ±2.0% over -40°C to +85°C - ensures reliable trip points across industrial temperature range without calibration. |
| Input Thresholds | IN1 = 4.50V (5.0V −5%), IN2 = 3.00V (3.3V −5%), IN3 = 1.62V (1.8V −5%), IN4 = 0.623V (adjustable) - matches common rail tolerances and enables flexible auxiliary monitoring. |
| Output Type | Four independent active-low open-drain outputs (PWRGD1–PWRGD4) with 10µA internal pullup - allows wire-ORing into single system power-good bus and interfacing with 1.8V–5.5V logic. |
| Temperature Range | −40°C to +85°C - qualified for extended industrial and computing environments. |
| Hysteresis | 0.3 × VTH - eliminates false triggering near threshold due to supply ripple or noise, no external components needed. |
Pinout & Package
Package: 10-pin µMAX (3.0mm × 3.0mm, 0.5mm pitch, exposed pad). Pin-compatible with MAX6709 variants and MAX6714 series in same footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN1 | Fixed 5.0V (−5%) monitor input - asserts PWRGD1 low when supply falls below 4.50V. |
| 2 | IN2 | Fixed 3.3V (−5%) monitor input - asserts PWRGD2 low when supply falls below 3.00V. |
| 3 | IN3 | Fixed 1.8V (−5%) monitor input - asserts PWRGD3 low when supply falls below 1.62V. |
| 4 | IN4 | Adjustable threshold input (0.623V typ) - used with external resistor divider to monitor custom voltages ≥0.62V. |
| 5 | GND | Analog/digital ground reference - must be low-impedance connection shared with monitored supplies. |
| 6 | PWRGD4 | Active-low open-drain output tied to IN4 - pulled high by 10µA internal current source to VCC; sinks current when IN4 undervolts. |
| 7 | PWRGD3 | Active-low open-drain output tied to IN3 - asserts low on 1.8V rail failure; compatible with wire-OR bus topology. |
| 8 | PWRGD2 | Active-low open-drain output tied to IN2 - provides 3.3V power-good status with <5µs propagation delay. |
| 9 | PWRGD1 | Active-low open-drain output tied to IN1 - indicates 5.0V rail integrity; supports >2mA sink capability at VOL ≤0.3V. |
| 10 | VCC | Power supply input (2.0V–5.5V) - powers internal reference/comparators and sources internal pullups; includes UVLO protection. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four isolated comparators enable concurrent validation of 5V/3.3V/1.8V/auxiliary rails without cross-coupling or shared timing. |
| Factory-trimmed thresholds | Eliminates need for external resistors or calibration - IN1/IN2/IN3 thresholds laser-trimmed to ±2% accuracy across temperature. |
| Adjustable IN4 input | Supports monitoring of any voltage ≥0.62V using two external resistors; internal 0.62V reference ensures stable scaling. |
| Low-power operation | 35µA typical ICC allows integration into always-on supervisory circuits without impacting system power budget. |
| Wire-OR compatible outputs | All PWRGD_ outputs are open-drain with weak 10µA pullups - simplifies combining multiple power-good signals into one system-ready line. |
Applications
| Desktop Computer Power Sequencing | Notebook Computer Battery Management |
|---|---|
Use Scenario: Verifying correct ramp-up order and stability of +5V, +3.3V, +1.8V, and auxiliary CPU core rails during boot. IC Role / Device Role / Timing Role: Quad voltage monitor asserting individual PWRGD_ signals per rail; enables motherboard CPLD/FPGA to gate downstream power enables only after all rails are valid. Use Value: Prevents premature processor initialization or memory access before stable power, eliminating boot failures caused by out-of-spec rail timing. |
Use Scenario: Supervising main DC-DC outputs (5V, 3.3V), battery voltage sense (1.8V), and adjustable buck converter feedback node in compact notebook power tree. IC Role / Device Role / Timing Role: Provides four independent power-good flags to EC (Embedded Controller) for dynamic rail enable/disable and fault logging. Use Value: Enables precise rail health reporting and graceful shutdown when any monitored voltage deviates beyond ±5% tolerance. |
| Server Backplane Voltage Validation | Industrial Multirail PLC Module |
Use Scenario: Monitoring redundant 5V, 3.3V, 1.8V, and FPGA I/O bank supplies on high-density server backplanes with tight thermal constraints. IC Role / Device Role / Timing Role: Compact µMAX-packaged supervisor delivering four simultaneous rail status signals to baseboard management controller (BMC). Use Value: Reduces BOM count vs. discrete supervisors; 35µA quiescent current minimizes self-heating in thermally constrained 1U chassis. |
Use Scenario: Validating isolated 5V logic, 3.3V microcontroller, 1.8V ADC reference, and field-side adjustable sensor supply in programmable logic controller modules. IC Role / Device Role / Timing Role: Centralized rail supervision IC feeding status to safety PLC logic; IN4 configured for 2.4V sensor excitation monitoring. Use Value: Single-chip solution replaces four discrete voltage detectors, reducing PCB area and improving long-term drift stability via shared reference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6709CUB+T | Same package and pinout; IN1/IN2/IN3 thresholds set to 5.0V/3.3V/1.8V at −10% tolerance (4.25V/2.85V/1.53V) instead of −5%. | Suitable where looser rail tolerance is acceptable (e.g., non-critical auxiliary rails), but not drop-in for designs requiring tighter 5% margin. | Select MAX6709CUB+T only if system-level validation confirms −10% trip points meet functional safety or startup timing requirements. |
| TLV809E33DBZR | Single-channel 3.3V supervisor (−5%) in SOT-23; lacks quad integration, adjustable input, and multi-rail coordination capability. | Requires four separate devices plus external logic to replicate MAX6709DUB+T functionality - increases board area, cost, and routing complexity. | Use TLV809E33DBZR only for point-of-load monitoring where quad integration is unnecessary and space permits discrete implementation. |
Compared with MAX6709CUB+T, the MAX6709DUB+T provides tighter −5% trip thresholds critical for high-reliability computing rails; compared with TLV809E33DBZR, it delivers integrated quad monitoring with coordinated timing and reduced component count - essential for space-constrained multivoltage systems.
Availability
MAX6709DUB+T is available at Aetrix Electronics and suitable for desktop computers, notebook computers, and server backplane applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX6709DUB+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX6709DUB+T belongs to Maxim's voltage supervisor product line, engineered specifically for accurate, low-power, multirail power-good monitoring in space- and power-constrained computing platforms.
FAQ
What is the exact threshold voltage for each input on the MAX6709DUB+T?
The MAX6709DUB+T has factory-set thresholds: IN1 = 4.50V (5.0V −5%), IN2 = 3.00V (3.3V −5%), IN3 = 1.62V (1.8V −5%), and IN4 = 0.623V (adjustable reference). These values are specified in the Electrical Characteristics table of the MAX6709 datasheet and confirmed in the Selector Guide for part number MAX6709DUB+T. All thresholds maintain ±2.0% accuracy across −40°C to +85°C.
Does the MAX6709DUB+T include a reset output or manual reset input?
No, the MAX6709DUB+T does not include a reset output or manual reset (MR) input. It is a pure quad power-good monitor with four PWRGD_ outputs only. The reset functionality is exclusive to the MAX6714 family (e.g., MAX6714DUB+T). This distinction is clearly stated in the Functional Diagram (Figure 1) and Pin Description section of the MAX6709/MAX6714 datasheet.
Can the MAX6709DUB+T monitor a 2.5V supply?
No - the MAX6709DUB+T variant is configured for IN1 = 5.0V, IN2 = 3.3V, IN3 = 1.8V, and IN4 = adjustable. To monitor 2.5V, select MAX6709AUB+T or MAX6709BUB+T (both specify IN3 = 2.5V). The Selector Guide explicitly assigns 2.5V only to variants A/B/E/F/G/H/I/J/K/L, not D. Using MAX6709DUB+T for 2.5V would require repurposing IN4 with an external divider, sacrificing one monitoring channel.
What is the maximum sink current supported by the PWRGD_ outputs of the MAX6709DUB+T?
The PWRGD_ outputs of the MAX6709DUB+T support up to 2mA sink current while maintaining VOL ≤ 0.3V (tested at VCC = 5V and VCC = 2.5V). This is specified in the "Output Low Voltage" parameter of the Electrical Characteristics table. The 10µA internal pullup remains active during sinking, enabling robust interfacing with standard CMOS/TTL inputs without external pullups in most cases.
Is the MAX6709DUB+T RoHS-compliant and lead-free?
Yes, the MAX6709DUB+T is RoHS-compliant and supplied in lead-free packaging. The datasheet states: "Devices are available in both leaded and lead-free packaging. Specify lead free by adding the + symbol at the end of the part number when ordering." Since the full part number includes "+T", it denotes tape-and-reel packaging with lead-free (Pb-free) finish, fully compliant with EU RoHS Directive 2011/65/EU.
MAX6709DUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 1.67V, 3.08V, 4.63V, 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
MAX6709DUB+T FAQ
1.How can I place an order for MAX6709DUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6709DUB+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 MAX6709DUB+T reliable?
The price and inventory of MAX6709DUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6709DUB+T is usually 5 days.
3.What payment methods are accepted for MAX6709DUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6709DUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6709DUB+T?
MAX6709DUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6709DUB+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 MAX6709DUB+T?
For technical support, including MAX6709DUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6709DUB+T requirements.
6.How does Aetrix verify that MAX6709DUB+T is sourced from the original manufacturer or authorized distributors?
All MAX6709DUB+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 MAX6709DUB+T meets industry standards.
7.What is the process for return or replacement of MAX6709DUB+T?
All MAX6709DUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6709DUB+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 MAX6709DUB+T part is unused and in its original packaging.
Return procedure for MAX6709DUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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