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Analog Devices Inc./Maxim Integrated MAX6709IUB+
- Part No.:
- MAX6709IUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6709IUB+.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:241
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Product details
Overview
The MAX6709IUB+ 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/precision thresholds at 3.3V and 2.5V with ±2.0% accuracy, operates from 2.0V to 5.5V supply, consumes only 35µA typical supply current, and features factory-trimmed 10% tolerance thresholds - used in desktop computers, telecom equipment, and data storage systems.
For engineers reviewing the MAX6709IUB+ datasheet, MAX6709IUB+ pinout, MAX6709IUB+ application, or MAX6709IUB+ equivalent, this page delivers verified electrical parameters, µMAX package layout, real-world use scenarios, and validated alternative options for multivoltage power sequencing and system reset integrity.
Technical Context
The MAX6709IUB+ integrates four precision comparators with an internal 0.62V bandgap reference and factory-configured resistor-divider networks for fixed-voltage monitoring (3.3V, 2.5V) and two adjustable inputs (IN1, IN4) referenced to 0.62V. Each comparator drives an independent open-drain output with 10µA internal pullup to VCC, enabling wire-ORed power-good signaling without external components.
It implements built-in 0.3% threshold hysteresis and undervoltage lockout (UVLO) that forces all outputs low when VCC drops below 2.0V. The device is fully specified across –40°C to +85°C and immune to supply transients up to 100µs duration at typical overdrive levels.
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. |
| 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 temperature without calibration. |
| Input Threshold Options | 3.3V (–10%), 2.5V (–10%), and two adjustable inputs (0.62V base) - matches common LDO and DC-DC output tolerances. |
| Output Type | Four independent active-low open-drain outputs with 10µA internal pullup - simplifies interface to diverse logic families and supports wired-AND fault aggregation. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and commercial computing environments. |
| Package | 10-pin µMAX (3mm × 3mm) - compact footprint for space-constrained multivoltage PCBs. |
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 threshold input - connects to external resistor divider; monitors voltages down to 0.62V via scaling. |
| 2 | IN2 | Fixed 3.3V nominal input - factory-trimmed for –10% trip at 2.97V; used for main I/O rail supervision. |
| 3 | IN3 | Fixed 2.5V nominal input - factory-trimmed for –10% trip at 2.25V; supervises core logic or analog supply. |
| 4 | IN4 | Adjustable threshold input - identical function to IN1; enables dual flexible monitoring points. |
| 5 | GND | Analog/digital ground reference - single ground pin shared by 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; supports power-good sequencing. |
| 8 | PWRGD2 | Active-low open-drain output - asserts low when IN2 falls below 2.97V; used for 3.3V rail validation. |
| 9 | PWRGD1 | Active-low open-drain output - asserts low when IN1 falls below its adjustable threshold; enables custom rail monitoring. |
| 10 | VCC | Power supply input - powers internal circuitry and serves as pullup source for all PWRGD outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four isolated comparator channels eliminate cross-rail interference during brownout or sequencing events. |
| Factory-trimmed precision thresholds | 3.3V and 2.5V inputs trimmed to ±2.0% accuracy - removes need for external resistors or calibration in standard applications. |
| Adjustable inputs (IN1, IN4) | Supports monitoring of any voltage ≥0.62V using external resistor dividers - extends flexibility beyond fixed rails. |
| Low quiescent current | 35µA typical ICC - reduces standby power in always-on supervisory circuits without sacrificing response time. |
| Integrated hysteresis | 0.3% of threshold voltage - prevents chatter during slow-moving or noisy supply transitions without external feedback. |
| Wire-OR compatible outputs | Open-drain outputs with weak 10µA pullups - allow multiple PWRGD signals to be combined into a single system power-good line. |
Applications
| Desktop Computer Power Sequencing | Telecom Line Card Supervision |
|---|---|
Use Scenario: Monitoring 3.3V PCIe slot power, 2.5V memory I/O, and two auxiliary rails (e.g., 1.2V GPU core, 5V USB) during cold boot and thermal throttling. IC Role / Device Role / Timing Role: Quad voltage monitor providing independent PWRGD signals per rail to enable staggered enable timing and fault isolation. Use Value: Prevents system lockup by asserting individual rail faults before CPU initialization, reducing debug time in BIOS/post-validation. |
Use Scenario: Supervising redundant 3.3V and 2.5V supplies on a carrier-grade line card with hot-swap capability and field-replaceable modules. IC Role / Device Role / Timing Role: Real-time rail validation with fast propagation delay (<5µs) and transient immunity - critical for failover decision latency. Use Value: Enables sub-10ms detection of supply droop during load step changes, triggering immediate switchover to backup converters. |
| Data Storage Controller Board | Industrial Multivoltage PLC Module |
Use Scenario: Validating 3.3V SATA controller, 2.5V SSD interface, and two configurable rails (e.g., 1.8V PHY, 1.0V FPGA core) on a RAID controller board. IC Role / Device Role / Timing Role: Centralized power-good arbiter feeding FPGA configuration logic and enabling sequenced peripheral bring-up. Use Value: Eliminates need for discrete supervisor ICs per rail, reducing BOM count and PCB area by 60% versus dual-dual-monitor solutions. |
Use Scenario: Monitoring 3.3V logic, 2.5V sensor interface, and two field-programmable rails (e.g., 12V actuator drive, 5V analog front-end) in a DIN-rail mounted PLC. IC Role / Device Role / Timing Role: Adjustable inputs (IN1, IN4) configured for non-standard rails using external dividers - supports legacy and custom power architectures. Use Value: Delivers deterministic reset behavior across wide temperature (-40°C to +85°C) and voltage ranges without recalibration. |
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+ | Same pinout and package; differs only in threshold tolerance (5% vs. 10% for MAX6709IUB+); identical 3.3V/2.5V/adjustable configuration. | Used where tighter supply tolerance (±2.5%) is required for high-reliability compute or storage subsystems. | Select MAX6710IUB+ when design mandates <5% trip uncertainty under worst-case temp/voltage conditions. |
| TPS3307-33DBVR | Triple voltage monitor (not quad); fixed 3.3V/3.3V/RESET thresholds; no adjustable inputs; 6-pin SOT-23 package. | Limited to dual-rail + reset applications; lacks second adjustable channel and quad independence. | Choose only if system requires exactly three monitored rails and space constraints favor SOT-23 over µMAX. |
Compared with MAX6710IUB+, the MAX6709IUB+ offers relaxed 10% trip tolerance for cost-sensitive designs with looser supply specs; compared with TPS3307-33DBVR, it provides full quad independence and dual adjustable inputs - essential for complex multivoltage sequencing where rail dependencies must be decoupled.
Availability
The MAX6709IUB+ is available at Aetrix Electronics and suitable for desktop computers, telecommunications infrastructure, and data storage equipment requiring stable component supply across extended temperature operation and long production lifecycles.
Supply support for MAX6709IUB+ 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 MAX6709IUB+ belongs to Maxim's precision voltage supervisor product line, engineered specifically for reliable, low-power, multirail power sequencing and fault detection in space- and power-constrained embedded systems.
FAQ
What is the exact threshold voltage for the 3.3V input on the MAX6709IUB+?
The MAX6709IUB+ has a factory-trimmed 3.3V input (IN2) with –10% tolerance, resulting in a precise trip point of 2.97V (nominal 3.3V × 0.9). This value is guaranteed across –40°C to +85°C with ±2.0% accuracy, and appears in the Selector Guide as "3.3V (–10%)" for the MAX6709IUB+ variant. No external components are needed to achieve this threshold.
Does the MAX6709IUB+ support monitoring a 1.8V supply?
No, the MAX6709IUB+ does not support 1.8V monitoring. Its fixed inputs are configured for 3.3V and 2.5V (both –10%), and its two adjustable inputs (IN1, IN4) are referenced to 0.62V - meaning they can monitor voltages ≥0.62V using external resistor dividers. To supervise 1.8V, a divider scaling 1.8V down to 0.62V would be required, but the MAX6709IUB+'s Selector Guide confirms no 1.8V fixed option is assigned to this part number.
Can the MAX6709IUB+ outputs drive a 5V logic input directly?
Yes, the MAX6709IUB+ outputs are open-drain with 10µA internal pullup to VCC, but they can be overdriven by an external pullup to 5V. Internal circuitry blocks reverse current flow from the external 5V pullup into VCC, allowing safe interfacing with 5V-tolerant inputs even when VCC = 3.3V or 2.5V. This is explicitly supported in the Applications Information section.
What is the propagation delay of the MAX6709IUB+ comparators?
The MAX6709IUB+ exhibits a typical propagation delay of 5µs (with 10mV/µs slew rate and 100mV overdrive), measured from input crossing threshold to output transition. This value is consistent across all four channels and is specified in the Electrical Characteristics table under "Propagation Delay (tPD)". Delay remains stable over temperature and supply voltage variations.
Is there a manual reset (MR) input on the MAX6709IUB+?
No, the MAX6709IUB+ does not include a manual reset (MR) input. MR is exclusive to the MAX6714 family (e.g., MAX6714IUB+). The MAX6709IUB+ is a pure quad voltage monitor with four PWRGD outputs only - it lacks RESET assertion logic, timeout circuitry, or MR functionality. This distinction is clearly defined in the Pin Description and Functional Diagram sections of the datasheet.
MAX6709IUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for MAX6709IUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6709IUB+ 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+ reliable?
The price and inventory of MAX6709IUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6709IUB+ is usually 5 days.
3.What payment methods are accepted for MAX6709IUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6709IUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6709IUB+?
MAX6709IUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6709IUB+ 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+?
For technical support, including MAX6709IUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6709IUB+ requirements.
6.How does Aetrix verify that MAX6709IUB+ is sourced from the original manufacturer or authorized distributors?
All MAX6709IUB+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6709IUB+?
All MAX6709IUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6709IUB+, 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+ part is unused and in its original packaging.
Return procedure for MAX6709IUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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