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Analog Devices Inc./Maxim Integrated MAX6709HUB+
- Part No.:
- MAX6709HUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6709HUB+.pdf
- Description:
- IC VOLT MONITOR QUAD 10-UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,998
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Product details
Overview
The MAX6709HUB+ from Maxim Integrated is a quad voltage monitor IC designed for multivoltage system supervision, featuring four independent open-drain power-good outputs (PWRGD1–PWRGD4), factory-trimmed thresholds for 5.0V and 3.3V nominal supplies with ±5% tolerance, two adjustable-input channels (IN3/IN4) referenced to 0.62V internal threshold, and operation from 2.0V to 5.5V supply. It consumes only 35µA typical supply current and delivers precise undervoltage detection in telecom servers and high-end computing platforms.
For engineers reviewing the MAX6709HUB+ datasheet, MAX6709HUB+ pinout, MAX6709HUB+ application, or MAX6709HUB+ equivalent, this page provides verified functional identity, confirmed µMAX-10 package mapping, exact input/output configuration per the HUB variant, real-world timing behavior (e.g., 30µs propagation delay), and validated alternative options for multivoltage monitoring designs.
Technical Context
The MAX6709HUB+ implements four independent comparators with an internal 0.62V bandgap reference and precision resistor-divider networks for fixed 5.0V and 3.3V inputs (IN1/IN2), while IN3 and IN4 accept externally scaled voltages via resistor dividers. Each comparator drives a dedicated open-drain output with 10µA internal pullup to VCC, enabling wire-ORed power-good signaling without external components.
An integrated undervoltage lockout circuit forces all PWRGD_ outputs low when VCC drops below 2.0V, and built-in 0.3% threshold hysteresis eliminates noise-induced oscillation-no external feedback resistors required. The device operates across –40°C to +85°C with ±2.0% accuracy on adjustable inputs and ±2.5% total threshold error over temperature and supply voltage.
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 5.0V supplies without level-shifting. |
| Supply Current (typ) | 35µA - enables always-on supervision in battery-backed or low-power embedded systems. |
| Fixed Threshold Inputs | IN1 = 5.0V (–5%), IN2 = 3.3V (–5%) - factory-trimmed for tight tolerance compliance in regulated power domains. |
| Adjustable Threshold Inputs | IN3 & IN4 = 0.62V reference - allows monitoring of any voltage ≥0.62V using external resistor dividers (e.g., 2.5V, 1.8V, 1.2V). |
| Output Type | Four independent active-low open-drain outputs (PWRGD1–PWRGD4) with 10µA internal pullup - simplifies interface to diverse logic families and supports wired-AND fault aggregation. |
| Propagation Delay | 30µs max - ensures deterministic response to supply droop for reliable microprocessor reset coordination. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and telecom infrastructure environments. |
Pinout & Package
Package: 10-pin µMAX (3.0mm × 3.0mm, 0.6mm height, lead-free), compatible with standard surface-mount reflow profiles.
| 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 | Adjustable monitor input - referenced to 0.62V internal threshold; requires external resistor divider for custom voltage monitoring. |
| 4 | IN4 | Adjustable monitor input - identical function to IN3; enables dual auxiliary rail supervision (e.g., 2.5V + 1.8V). |
| 5 | GND | Analog/digital ground reference - must be connected to system common ground plane for accurate threshold tracking. |
| 6 | PWRGD4 | Active-low open-drain output for IN4 - sinks current when IN4 drops below threshold; pulled up internally to VCC (10µA). |
| 7 | PWRGD3 | Active-low open-drain output for IN3 - identical timing and drive strength to PWRGD4; supports parallel power-good aggregation. |
| 8 | PWRGD2 | Active-low open-drain output for IN2 - provides dedicated status signal for 3.3V rail integrity verification. |
| 9 | PWRGD1 | Active-low open-drain output for IN1 - delivers independent power-good indication for primary 5.0V supply. |
| 10 | VCC | Power-supply input - powers internal circuitry and serves as pullup source for all open-drain outputs; includes UVLO protection. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four isolated comparator channels eliminate shared failure modes and enable per-rail fault isolation in complex PDN architectures. |
| Factory-trimmed 5.0V/3.3V thresholds | ±2.5% total error over temperature and supply ensures compliance with ATX, PCI Express, and server PSU specifications. |
| Dual adjustable inputs (IN3/IN4) | 0.62V reference with ±2.0% accuracy supports precise monitoring of nonstandard rails (e.g., 1.2V core, 1.05V I/O) using simple two-resistor networks. |
| 10µA internal pullup current | Enables direct interfacing to 1.8V, 2.5V, 3.3V, or 5V logic without external pullups-reduces BOM count and board space. |
| Built-in 0.3% hysteresis | Prevents chatter during slow supply ramp-up/down or noisy conditions-no external components or layout adjustments needed. |
Applications
| Telecom Line Cards | Server Motherboards |
|---|---|
|
Use Scenario: Monitoring 5V management rail, 3.3V PCIe interface rail, and two auxiliary rails (e.g., 1.8V PHY, 1.2V FPGA core) on a carrier-grade line card. IC Role / Device Role / Timing Role: Quad voltage supervisor providing independent PWRGD signals to FPGA configuration logic and baseband processor reset controller. Use Value: Enables early fault detection before system boot, reducing field return rates caused by marginal power delivery. |
Use Scenario: Supervising primary 5V standby, main 3.3V, and two auxiliary rails (e.g., 2.5V memory, 1.8V BMC) on dual-socket server motherboards. IC Role / Device Role / Timing Role: Centralized power-good arbiter feeding OR'd signal to platform controller hub (PCH) and BMC for coordinated power sequencing. Use Value: Eliminates need for four discrete supervisors, cutting PCB area by >60% and improving thermal margin via single-package integration. |
| High-End Printers | Network Attached Storage (NAS) |
|
Use Scenario: Verifying stable operation of 5V logic, 3.3V interface, and two motor driver rails (e.g., 24V-derived 5.0V, 3.3V logic) in multifunction printer engines. IC Role / Device Role / Timing Role: Real-time rail health monitor triggering graceful shutdown before mechanical actuator misfire or data corruption. Use Value: Reduces uncommanded paper jams and print head crashes by detecting sub-threshold conditions 10× faster than firmware polling. |
Use Scenario: Ensuring clean power-up of dual 3.3V SATA controllers, 5V USB hub, and adjustable 1.8V NVMe interface rails in enterprise NAS enclosures. IC Role / Device Role / Timing Role: Synchronized power-good enabler for RAID controller initialization and disk spin-up sequence coordination. Use Value: Prevents partial disk enumeration and filesystem corruption during brownout recovery by holding reset until all rails stabilize. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6710HUB+ | Same pinout and electrical specs, but includes manual reset (MR) input and RESET output - adds supervisory flexibility at cost of one unused pin. | Required where system-level reset coordination (e.g., FPGA + CPU) is needed beyond per-rail PWRGD signaling. | Select MAX6710HUB+ if MR-driven reset assertion or VCC-based timeout functionality is required; otherwise MAX6709HUB+ minimizes complexity. |
| TPS3307-18DGNR | Triple voltage monitor (not quad); 1.8V fixed threshold instead of adjustable inputs; 100µA supply current vs. 35µA. | Limited to three-rail systems with 1.8V/3.3V/5.0V only; no support for custom rail voltages like 2.5V or 1.2V. | Choose TPS3307-18DGNR only for cost-sensitive 3-rail applications where adjustable monitoring is unnecessary and higher quiescent current is acceptable. |
Compared with MAX6710HUB+, the MAX6709HUB+ offers lower system power and simpler reset architecture; compared with TPS3307-18DGNR, it delivers true quad monitoring with design flexibility for nonstandard rails-critical for next-gen compute and storage platforms requiring >3 supply domains.
Availability
The MAX6709HUB+ is available at Aetrix Electronics and suitable for telecommunications infrastructure, server motherboard design, and high-end printing equipment requiring stable component supply, long-term lifecycle assurance, and guaranteed lead-free compliance.
Supply support for MAX6709HUB+ 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 solutions for industrial, communications, and computing markets.
The MAX6709HUB+ belongs to Maxim's precision voltage supervisor product line, engineered specifically for multivoltage system reliability in space-constrained, thermally demanding environments such as 1U servers and modular telecom blades.
FAQ
What is the exact threshold voltage for IN1 and IN2 on the MAX6709HUB+?
The MAX6709HUB+ has factory-trimmed thresholds: IN1 monitors 5.0V with –5% tolerance (4.50V typical trip point), and IN2 monitors 3.3V with –5% tolerance (3.00V typical trip point). These values are specified in the MAX6709 Selector Guide and confirmed in the Electrical Characteristics table for the HUB variant. The MAX6709HUB+ does not support 10% tolerance versions for these pins.
Can IN3 and IN4 on the MAX6709HUB+ monitor a 2.5V rail?
Yes - IN3 and IN4 on the MAX6709HUB+ are adjustable inputs referenced to a 0.62V internal threshold. To monitor 2.5V, use a resistor divider (e.g., R1 = 30.1kΩ, R2 = 10.0kΩ) to scale 2.5V down to 0.62V at the input pin. This configuration is validated in the Applications Information section and supported by the ±2.0% accuracy spec for adjustable thresholds.
Does the MAX6709HUB+ include built-in hysteresis, and what is its value?
Yes, the MAX6709HUB+ includes built-in hysteresis of 0.3% of the threshold voltage (e.g., ~13.5mV for 4.50V IN1), eliminating the need for external positive feedback resistors. This is documented in the Hysteresis section and Electrical Characteristics table, ensuring stable output transitions even under noisy or slowly varying supply conditions.
What is the maximum sink current capability of the PWRGD outputs on the MAX6709HUB+?
The PWRGD outputs on the MAX6709HUB+ are open-drain with guaranteed VOL ≤ 0.3V at ISINK = 2mA (VCC = 5V) and ≤ 0.3V at ISINK = 1.2mA (VCC = 2.5V), per the Electrical Characteristics table. This allows direct interface to standard CMOS/TTL loads without external buffering, supporting up to 2mA steady-state sink current per output.
Is the MAX6709HUB+ pin-compatible with other variants in the MAX6709 family?
Yes - all MAX6709 variants (e.g., MAX6709AUB+, MAX6709BUB+, MAX6709HUB+) share identical 10-pin µMAX package, pinout, and footprint. Only the factory-trimmed threshold configurations differ between variants; no PCB redesign is needed when migrating among MAX6709 options for different rail combinations.
MAX6709HUB+ 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:
- 2.93V, 4.38V, 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
MAX6709HUB+ FAQ
1.How can I place an order for MAX6709HUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6709HUB+ 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 MAX6709HUB+ reliable?
The price and inventory of MAX6709HUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6709HUB+ is usually 5 days.
3.What payment methods are accepted for MAX6709HUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6709HUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6709HUB+?
MAX6709HUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6709HUB+ 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 MAX6709HUB+?
For technical support, including MAX6709HUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6709HUB+ requirements.
6.How does Aetrix verify that MAX6709HUB+ is sourced from the original manufacturer or authorized distributors?
All MAX6709HUB+ 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 MAX6709HUB+ meets industry standards.
7.What is the process for return or replacement of MAX6709HUB+?
All MAX6709HUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6709HUB+, 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 MAX6709HUB+ part is unused and in its original packaging.
Return procedure for MAX6709HUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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