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Analog Devices Inc./Maxim Integrated MAX6709GUB+
- Part No.:
- MAX6709GUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6709GUB+.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,165
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Product details
Overview
The MAX6709GUB+ 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 5.0V and 3.3V nominal supplies with ±5% tolerance, and supports two adjustable inputs (IN3/IN4) with factory-trimmed 0.62V internal reference - enabling precise monitoring of custom supply rails down to 0.62V. It operates from 2.0V to 5.5V and consumes only 35µA typical supply current, making it suitable for telecom power sequencing and embedded system reset management.
For engineers reviewing the MAX6709GUB+ datasheet, MAX6709GUB+ pinout, MAX6709GUB+ application, or MAX6709GUB+ equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in multivoltage systems, and validated alternative options - all grounded in Maxim's official specifications for the MAX6709GUB+ variant.
Technical Context
The MAX6709GUB+ implements four independent precision comparators with an internal 0.62V bandgap reference and factory-trimmed resistor-divider networks for fixed thresholds (5.0V and 3.3V), while IN3 and IN4 accept externally scaled voltages via resistor dividers. Each comparator features built-in 0.3% threshold hysteresis and operates across –40°C to +85°C with ±2.0% accuracy on adjustable inputs.
All four PWRGD outputs are open-drain with 10µA internal pullup to VCC, supporting wire-ORed power-good signaling and compatibility with logic supplies up to 5.5V. An undervoltage lockout circuit forces all outputs low when VCC drops below 2.0V, ensuring reliable behavior during brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 5.5V - supports direct connection to monitored rails or dedicated bias supply without level-shifting. |
| Supply Current (typ) | 35µA at VCC = 5V - enables always-on supervision in battery-backed or low-power systems. |
| Fixed Thresholds | 5.0V (–10%) and 3.3V (–10%) - matches common LDO tolerances for reliable power-good assertion. |
| Adjustable Threshold | 0.62V ±2.0% - allows monitoring of any rail ≥0.62V using external resistor divider (e.g., 1.2V, 1.8V, 2.5V). |
| Output Type | Four independent open-drain PWRGD outputs with 10µA internal pullup - eliminates need for external pullups in most 3.3V/5V logic interfaces. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and telecom equipment environments. |
| Threshold Hysteresis | 0.3 × VTH - prevents chatter during slow-rising/falling supply transitions without external components. |
Pinout & Package
MAX6709GUB+ is housed in a 10-pin µMAX package (3.0mm × 3.0mm, 0.6mm height), lead-free, RoHS-compliant, with exposed pad for thermal performance.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN1 | Monitored input for 5.0V nominal supply (–10% trip threshold = 4.50V); high-impedance comparator input. |
| 2 | IN2 | Monitored input for 3.3V nominal supply (–10% trip threshold = 2.97V); high-impedance comparator input. |
| 3 | IN3 | Adjustable input; connects directly to comparator noninverting input referenced to 0.62V - requires external resistor divider to set threshold. |
| 4 | IN4 | Adjustable input; identical function to IN3 - supports dual custom-rail monitoring (e.g., 1.2V and 1.8V). |
| 5 | GND | Analog/digital ground reference for all comparators and internal reference; must be low-impedance. |
| 6 | PWRGD4 | Active-low open-drain output asserting when IN4 falls below its threshold; 10µA internal pullup to VCC. |
| 7 | PWRGD3 | Active-low open-drain output asserting when IN3 falls below its threshold; 10µA internal pullup to VCC. |
| 8 | PWRGD2 | Active-low open-drain output asserting when IN2 falls below 2.97V; used for 3.3V supply good indication. |
| 9 | PWRGD1 | Active-low open-drain output asserting when IN1 falls below 4.50V; used for 5.0V supply good indication. |
| 10 | VCC | Power supply input (2.0V–5.5V); powers internal circuitry and serves as pullup source for all PWRGD outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four isolated comparator channels enable concurrent supervision of mixed-voltage domains without cross-talk. |
| Factory-trimmed fixed thresholds | 5.0V and 3.3V inputs calibrated to –10% tolerance (4.50V / 2.97V), eliminating external resistor networks for standard rails. |
| Dual adjustable inputs | IN3 and IN4 accept user-defined thresholds via resistor dividers - supports monitoring of 1.2V, 1.8V, 2.5V, or other rails ≥0.62V. |
| Low quiescent current | 35µA typical ICC enables integration into always-on supervisory paths without impacting system power budget. |
| Built-in hysteresis | 0.3% of threshold voltage prevents false triggering during noisy or slowly varying supply conditions - no external components needed. |
Applications
| Telecom Power Sequencing | Server Board Supervision |
|---|---|
|
Use Scenario: Monitoring 5V standby, 3.3V main, and two auxiliary rails (e.g., 1.2V CPU core, 1.8V memory) during cold start and hot-swap events in base station line cards. IC Role / Device Role / Timing Role: Quad voltage monitor providing synchronized PWRGD signals to FPGA configuration logic and PMIC enable sequencing. Use Value: Ensures all rails stabilize within spec before releasing reset - prevents latch-up and firmware corruption during power-up. |
Use Scenario: Validating power integrity across multiple voltage domains (5V, 3.3V, 1.8V, 1.2V) on dual-processor server motherboards with redundant PSUs. IC Role / Device Role / Timing Role: Centralized supply health monitor feeding status to BMC via discrete PWRGD lines or wired-OR bus. Use Value: Enables early fault detection and graceful shutdown before thermal runaway or data corruption occurs. |
| Industrial PLC I/O Module | Notebook Embedded Controller Interface |
|
Use Scenario: Supervising isolated 24V-to-5V DC/DC, 5V logic, 3.3V MCU, and 1.8V ADC reference in harsh factory-floor environments. IC Role / Device Role / Timing Role: Fault-tolerant voltage supervisor interfacing with watchdog timer and safety microcontroller via open-drain outputs. Use Value: Maintains deterministic reset behavior under EMI and supply transients - meets IEC 61000-4-4 compliance requirements. |
Use Scenario: Providing power-good feedback from main system rails (5V, 3.3V) and configurable rails (e.g., 1.5V GPU, 1.05V SoC) to embedded controller (EC) in ultrabook platforms. IC Role / Device Role / Timing Role: Dedicated voltage monitor decoupled from EC's internal supervisors - improves boot reliability and thermal throttling coordination. Use Value: Reduces EC firmware complexity by offloading rail validation and enabling hardware-level fast-fail response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6710GUB+ | Same pinout and package; differs only in supply tolerance - MAX6710GUB+ uses –5% thresholds (4.75V/3.15V) vs. –10% (4.50V/2.97V) for MAX6709GUB+. | Preferred where tighter supply regulation is guaranteed (e.g., high-end servers with precision LDOs), not suitable for wider-tolerance SMPS designs. | Select MAX6710GUB+ only if system rails hold ±5% tolerance; otherwise MAX6709GUB+ ensures robustness against typical ±10% SMPS variation. |
| TPS3307-18DGNR | Triple voltage monitor (not quad); offers 1.8V fixed input + two adjustable inputs; no 5V/3.3V fixed options; 50µA ICC; 8-pin MSOP. | Lacks native 5V/3.3V monitoring - requires external dividers for those rails, increasing BOM count and layout area. | Use only when exactly three rails require supervision and space constraints favor 8-pin package; MAX6709GUB+ remains optimal for true quad coverage with zero external components. |
Compared with MAX6710GUB+, the MAX6709GUB+ provides greater margin for SMPS-based systems with ±10% tolerance, while TPS3307-18DGNR sacrifices one monitoring channel and adds design overhead - making MAX6709GUB+ the most integrated, drop-in solution for 5V/3.3V + dual adjustable rail supervision.
Availability
MAX6709GUB+ is available at Aetrix Electronics and suitable for telecommunications infrastructure, server board design, and industrial PLC development requiring stable component supply and long-term production continuity.
Supply support for MAX6709GUB+ 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, communications, and computing markets.
The MAX6709GUB+ belongs to Maxim's precision voltage supervisor product line, engineered specifically for multivoltage system power sequencing, reset generation, and supply health monitoring in space-constrained, high-reliability applications.
FAQ
What is the exact threshold voltage for IN1 and IN2 on the MAX6709GUB+?
The MAX6709GUB+ has factory-trimmed thresholds: IN1 trips at 4.50V (–10% of 5.0V nominal), and IN2 trips at 2.97V (–10% of 3.3V nominal). These values are guaranteed over –40°C to +85°C with ±2.0% accuracy on adjustable inputs, but fixed thresholds exhibit tighter distribution per Maxim's production test limits.
Can the MAX6709GUB+ monitor a 1.2V supply, and how is it configured?
Yes - the MAX6709GUB+ can monitor a 1.2V supply using either IN3 or IN4. Connect the 1.2V rail to the input through a resistor divider that scales it to 0.62V at the comparator input (e.g., R1 = 93kΩ, R2 = 100kΩ). The device's internal 0.62V reference ensures ±2.0% threshold accuracy across temperature.
Does the MAX6709GUB+ require external pullup resistors on its PWRGD outputs?
No - the MAX6709GUB+ integrates 10µA internal pullup current sources to VCC on all four PWRGD outputs. External pullups are optional and only needed when interfacing with logic supplies higher than VCC (e.g., 5V logic driving a 3.3V-supplied MAX6709GUB+), in which case the internal pullup is safely overdriven.
How does the MAX6709GUB+ behave during VCC brownout?
Below 2.0V, the MAX6709GUB+ activates an internal undervoltage lockout circuit that forces all PWRGD outputs low regardless of input conditions. This ensures clean, predictable reset signaling during power collapse - and the device remains functional down to 1V, with outputs held low until VCC recovers above 2.0V.
Is the MAX6709GUB+ pin-compatible with other variants in the MAX6709 family?
Yes - all MAX6709xxB+ variants (including MAX6709GUB+) share identical 10-pin µMAX pinout and footprint. Differences are limited to factory-programmed threshold configurations and supply tolerances; no PCB changes are required when substituting within the MAX6709 family for same-package variants.
MAX6709GUB+ 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:
- Obsolete
- 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
MAX6709GUB+ FAQ
1.How can I place an order for MAX6709GUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6709GUB+ 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 MAX6709GUB+ reliable?
The price and inventory of MAX6709GUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6709GUB+ is usually 5 days.
3.What payment methods are accepted for MAX6709GUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6709GUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6709GUB+?
MAX6709GUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6709GUB+ 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 MAX6709GUB+?
For technical support, including MAX6709GUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6709GUB+ requirements.
6.How does Aetrix verify that MAX6709GUB+ is sourced from the original manufacturer or authorized distributors?
All MAX6709GUB+ 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 MAX6709GUB+ meets industry standards.
7.What is the process for return or replacement of MAX6709GUB+?
All MAX6709GUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6709GUB+, 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 MAX6709GUB+ part is unused and in its original packaging.
Return procedure for MAX6709GUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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