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Analog Devices Inc./Maxim Integrated MAX6709IUB+T
- Part No.:
- MAX6709IUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6709IUB+T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,828
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Product details
Overview
The MAX6709IUB+T from Maxim Integrated is a quad voltage monitor IC for multivoltage systems, featuring four independent active-low open-drain outputs with 10µA internal pullup to VCC, factory-trimmed thresholds for 3.3V and 2.5V nominal supplies (±10% tolerance), and adjustable inputs supporting down-to-0.62V threshold detection. It consumes only 35µA typical supply current and operates from 2.0V to 5.5V, targeting power-good supervision in desktop computers and data storage equipment.
For engineers reviewing the MAX6709IUB+T datasheet, MAX6709IUB+T pinout, MAX6709IUB+T application, or MAX6709IUB+T equivalent, this page delivers verified electrical parameters, µMAX package layout, real-world use scenarios in multivoltage monitoring, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The MAX6709IUB+T implements four precision comparators with an internal 0.62V bandgap reference and factory-laser-trimmed resistor-divider networks for fixed 3.3V and 2.5V monitoring. Two inputs are adjustable (IN1 and IN4), accepting external resistor dividers to scale higher voltages down to the 0.62V comparator threshold.
Hysteresis is built-in at 0.3% of threshold voltage, eliminating need for external feedback resistors. An undervoltage lockout circuit forces all PWRGD_ outputs low when VCC drops below 2.0V, and all outputs remain functional down to VCC = 1V over temperature (-40°C to +85°C).
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 2.5V supplies without level-shifting. |
| Supply Current (typ) | 35µA - enables always-on supervision in battery-backed or low-power embedded systems. |
| Threshold Accuracy | ±2.0% - ensures reliable trip points across -40°C to +85°C for stable power-good assertion timing. |
| Adjustable Threshold | 0.62V (±2.0%) - serves as reference for external resistor dividers to monitor any voltage ≥0.62V. |
| Output Type | Four independent open-drain PWRGD_ outputs with 10µA internal pullup - allows wire-ORing into single system power-good signal. |
| Input Hysteresis | 0.3% of VTH - prevents chatter during slow-rising/falling supply transitions without external components. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and computing environments with no derating required. |
Pinout & Package
Package: 10-pin µMAX (3.0mm × 3.0mm, 0.6mm height, 0.5mm pitch), lead-free, RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN1 | Adjustable input - connects to external resistor divider for custom voltage monitoring (e.g., >0.62V). |
| 2 | IN2 | Fixed 3.3V monitor input - factory-trimmed for ±10% tolerance (trip at 2.97V). |
| 3 | IN3 | Fixed 2.5V monitor input - factory-trimmed for ±10% tolerance (trip at 2.25V). |
| 4 | IN4 | Adjustable input - identical function to IN1; supports second custom voltage threshold. |
| 5 | GND | Analog/digital ground reference - common return for all comparators and outputs. |
| 6 | PWRGD4 | Active-low open-drain output - asserts low when IN4 falls below its threshold; 10µA internal pullup to VCC. |
| 7 | PWRGD3 | Active-low open-drain output - asserts low when IN3 falls below 2.25V; 10µA internal pullup to VCC. |
| 8 | PWRGD2 | Active-low open-drain output - asserts low when IN2 falls below 2.97V; 10µA internal pullup to VCC. |
| 9 | PWRGD1 | Active-low open-drain output - asserts low when IN1 falls below its adjusted threshold; 10µA internal pullup to VCC. |
| 10 | VCC | Power-supply input - powers internal circuitry and sources internal pullups; UVLO activates below 2.0V. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four separate comparator channels enable simultaneous supervision of mixed-voltage rails (e.g., 3.3V, 2.5V, and two custom voltages) with no shared timing or dependency. |
| Factory-trimmed fixed thresholds | IN2 and IN3 are preconfigured for 3.3V and 2.5V nominal supplies at ±10% tolerance - eliminates calibration effort and external resistor networks for those rails. |
| Adjustable inputs (IN1, IN4) | Each accepts external resistor dividers to monitor any voltage ≥0.62V - supports flexible adaptation to nonstandard supply levels without redesign. |
| Low quiescent current | 35µA typical ICC enables integration into always-on supervisory paths without impacting system standby budget. |
| Integrated hysteresis | 0.3% of threshold voltage is built-in - prevents false triggering on noisy or slowly ramping supplies without external components. |
Applications
| Desktop Computer Power Sequencing | RAID Controller Voltage Supervision |
|---|---|
|
Use Scenario: Monitoring 3.3V PCIe slot power, 2.5V memory I/O, and two auxiliary rails (e.g., 1.2V core, 1.8V PHY) during cold boot and hot-plug events. IC Role / Device Role / Timing Role: Quad voltage monitor providing independent PWRGD_ signals to motherboard CPLD for staged power-enable sequencing and fault isolation. Use Value: Eliminates need for four discrete supervisors or complex FPGA logic; factory-trimmed 3.3V/2.5V thresholds ensure timing accuracy within ±2% over temperature. |
Use Scenario: Supervising dual 3.3V supplies (controller + disk interface), 2.5V SATA PHY, and adjustable 1.2V LDO output in enterprise RAID enclosures. IC Role / Device Role / Timing Role: Centralized power-good arbiter generating combined PWRGD signal via wire-ORed open-drain outputs to RAID controller reset logic. Use Value: Reduces BOM count by 75% vs. discrete solutions; 10µA internal pullups allow direct interfacing with 3.3V logic without external resistors. |
| Industrial PLC Backplane Monitoring | Network Attached Storage (NAS) Multirail Check |
|
Use Scenario: Continuous supervision of 5V backplane, 3.3V logic, 2.5V FPGA I/O, and adjustable 1.5V analog supply in fanless PLC chassis. IC Role / Device Role / Timing Role: Fault-detection node feeding watchdog timer and front-panel LED status; outputs asserted low on any rail failure. Use Value: -40°C to +85°C operation ensures reliability in uncontrolled cabinet environments; ±2% threshold accuracy prevents nuisance trips during thermal cycling. |
Use Scenario: Verifying stability of 12V HDD power, 5V USB hub, 3.3V SoC, and adjustable 1.8V NVMe controller supply before mounting filesystems. IC Role / Device Role / Timing Role: Pre-boot health checker asserting system reset until all four PWRGD_ signals are high - preventing corrupted writes during brownout. Use Value: 35µA supply current minimizes impact on standby power; adjustable inputs support legacy 1.8V NVMe rails not covered by fixed options. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6710IUB+T | Same pinout and package; differs only in supply tolerance - supports ±5% instead of ±10% for IN2/IN3 (3.3V/2.5V). | Used where tighter supply regulation is enforced (e.g., telecom line cards); requires validation of margin against actual rail ripple. | Select MAX6710IUB+T if system design guarantees ≤5% variation on 3.3V/2.5V rails and tighter trip point control is needed. |
| TPS3307-33DBVR | Triple supervisor (not quad); fixed 3.3V, 2.5V, and 1.25V thresholds; no adjustable inputs; 1.6µA IQ. | Lacks fourth channel and adjustability - suitable only when exactly three rails must be monitored and no custom voltages exist. | Choose TPS3307-33DBVR only for cost-sensitive, triple-rail designs where fourth rail supervision is handled separately. |
Compared with MAX6710IUB+T, the MAX6709IUB+T provides wider tolerance margins ideal for less-regulated consumer-grade supplies; versus TPS3307-33DBVR, it adds critical fourth-channel flexibility and adjustable inputs essential for heterogeneous multivoltage systems.
Availability
MAX6709IUB+T is available at Aetrix Electronics and suitable for desktop computers, RAID controllers, industrial PLCs, and network-attached storage systems requiring stable component supply with guaranteed long-term sourcing.
Supply support for MAX6709IUB+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, with emphasis on high-reliability industrial and computing solutions.
The MAX6709IUB+T belongs to Maxim's voltage supervisor product line, engineered specifically for compact, low-power multivoltage system monitoring where space, accuracy, and supply independence are critical.
FAQ
What is the exact threshold voltage for IN2 and IN3 on the MAX6709IUB+T?
The MAX6709IUB+T has factory-trimmed thresholds: IN2 monitors 3.3V nominal at -10% tolerance (2.97V trip point), and IN3 monitors 2.5V nominal at -10% tolerance (2.25V trip point). These values are guaranteed across -40°C to +85°C with ±2.0% accuracy per the datasheet Electrical Characteristics table.
Can the MAX6709IUB+T monitor a 1.2V supply?
Yes - the MAX6709IUB+T can monitor a 1.2V supply using either IN1 or IN4. Connect a resistor divider (e.g., R1 = 100kΩ, R2 = 100kΩ) between the 1.2V rail and GND, feeding the junction to the adjustable input. The internal 0.62V reference yields VTH = 0.62V × (R1 + R2)/R2 = 1.24V, closely matching the target.
Does the MAX6709IUB+T require external pull-up resistors on its PWRGD outputs?
No - the MAX6709IUB+T integrates 10µA internal pullup current sources to VCC on all four PWRGD_ outputs. External pullups are optional and only needed when interfacing with logic operating at voltages other than VCC (e.g., 1.8V I/O driving a 3.3V PWRGD line).
What is the minimum VCC voltage at which the MAX6709IUB+T remains functional?
The MAX6709IUB+T operates down to VCC = 2.0V per specification. Below that, its undervoltage lockout circuit forces all PWRGD_ outputs low. However, the device continues to function - and outputs remain valid - down to VCC = 1.0V, as confirmed in Absolute Maximum Ratings and Typical Operating Characteristics.
How does hysteresis work on the MAX6709IUB+T, and is it configurable?
Hysteresis on the MAX6709IUB+T is fixed at 0.3% of the threshold voltage (e.g., 6.75mV for a 2.25V trip point) and is fully integrated - no external components or configuration is required. This built-in hysteresis prevents oscillation during slow supply ramps and eliminates the need for external positive-feedback networks.
MAX6709IUB+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:
- 2.19V, 2.93V, 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
MAX6709IUB+T FAQ
1.How can I place an order for MAX6709IUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6709IUB+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 MAX6709IUB+T reliable?
The price and inventory of MAX6709IUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6709IUB+T is usually 5 days.
3.What payment methods are accepted for MAX6709IUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6709IUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6709IUB+T?
MAX6709IUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6709IUB+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 MAX6709IUB+T?
For technical support, including MAX6709IUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6709IUB+T requirements.
6.How does Aetrix verify that MAX6709IUB+T is sourced from the original manufacturer or authorized distributors?
All MAX6709IUB+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 MAX6709IUB+T meets industry standards.
7.What is the process for return or replacement of MAX6709IUB+T?
All MAX6709IUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6709IUB+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 MAX6709IUB+T part is unused and in its original packaging.
Return procedure for MAX6709IUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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