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Analog Devices Inc./Maxim Integrated MAX6709AUB
- Part No.:
- MAX6709AUB
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6709AUB.pdf
- Description:
- IC SUPERVISOR QUAD VOLT MONITOR
- Quantity:
- Payment:
- Shipping:
Inventory:1,315
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Product details
Overview
MAX6709AUB from Maxim Integrated is a low-power, quad voltage monitor IC designed for multivoltage system supervision. It monitors four independent supply rails - 5.0V (−10%), 3.3V (−10%), 2.5V (−10%), and an adjustable input down to 0.62V - with ±2.0% threshold accuracy, 35µA typical supply current, and operation from 2.0V to 5.5V. It delivers four independent active-low open-drain PWRGD outputs with 10µA internal pullups to VCC, enabling wire-ORed power-good signaling in desktop computers and telecom equipment.
For engineers reviewing the MAX6709AUB datasheet, MAX6709AUB pinout, MAX6709AUB application, or MAX6709AUB equivalent, this page provides verified functional specifications, validated pin-level circuit roles, confirmed temperature range (−40°C to +85°C), µMAX package dimensions, and real-world substitution guidance for multivoltage monitoring designs requiring precision, low quiescent current, and factory-trimmed thresholds.
Technical Context
The MAX6709AUB integrates four high-input-impedance comparators with an internal 0.62V bandgap reference and factory-trimmed resistor-divider networks for fixed-threshold monitoring of 5.0V, 3.3V, and 2.5V supplies at −10% tolerance. Its adjustable IN4 input bypasses internal dividers and connects directly to a comparator, supporting external resistor-divider configurations for custom thresholds as low as 0.62V.
An undervoltage lockout circuit forces all PWRGD outputs low when VCC drops below 2.0V. All outputs feature weak 10µA internal pullups to VCC, allowing interoperability with logic supplies up to 5.5V without reverse current flow, and support wire-ORed power-good bus architectures without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 5.5V - powers the device and sets valid operating window; UVLO activates below 2.0V. |
| Supply Current (typ) | 35µA at VCC = 5V - enables always-on supervision in battery-backed or low-power systems. |
| Threshold Accuracy | ±2.0% over −40°C to +85°C - ensures reliable trip points across industrial temperature range without calibration. |
| Input Thresholds | 5.0V (−10%), 3.3V (−10%), 2.5V (−10%), adjustable (0.62V min) - matches common supply tolerances and supports custom rail monitoring. |
| Output Type | Four independent active-low open-drain outputs with 10µA internal pullup to VCC - allows flexible logic interfacing and wire-ORed power-good signaling. |
| Operating Temperature | −40°C to +85°C - qualified for extended industrial and computing environments. |
| Hysteresis | 0.3 × VTH - built-in noise immunity eliminates need for external hysteresis resistors. |
Pinout & Package
The MAX6709AUB is housed in a 10-pin µMAX package (3mm × 3mm, 0.6mm height), RoHS-compliant, with exposed pad for thermal performance. Pin pitch is 0.5mm; lead finish is matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN1 | Monitors 5.0V supply at −10% threshold (4.50V); high-impedance comparator input. |
| 2 | IN2 | Monitors 3.3V supply at −10% threshold (2.85V); high-impedance comparator input. |
| 3 | IN3 | Monitors 2.5V supply at −10% threshold (2.13V); high-impedance comparator input. |
| 4 | IN4 | Adjustable input; referenced to 0.62V internal threshold - requires external resistor divider for voltages >0.62V. |
| 5 | GND | Analog/digital ground reference for all comparators and internal circuitry. |
| 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 2.13V; 10µA internal pullup to VCC. |
| 8 | PWRGD2 | Active-low open-drain output asserting when IN2 falls below 2.85V; 10µA internal pullup to VCC. |
| 9 | PWRGD1 | Active-low open-drain output asserting when IN1 falls below 4.50V; 10µA internal pullup to VCC. |
| 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 dedicated comparator channels with separate inputs and outputs - enables concurrent supervision of multiple rails without shared timing or reset propagation delays. |
| Factory-trimmed thresholds | 5.0V/3.3V/2.5V options at −10% tolerance (e.g., 4.50V, 2.85V, 2.13V) - eliminates external resistor networks and calibration for standard supplies. |
| Adjustable input (IN4) | 0.62V internal reference with direct comparator access - supports custom monitoring from 0.62V upward using two external resistors. |
| Low quiescent current | 35µA typical at 5V - extends battery life in portable or backup-supervised systems and reduces self-heating in dense PCB layouts. |
| Built-in hysteresis | 0.3% of threshold voltage - suppresses false triggering due to supply noise without external feedback components. |
| Wire-OR compatible outputs | Open-drain PWRGD outputs with 10µA internal pullups - simplifies power-good bus design and avoids contention when multiple monitors share a single reset line. |
Applications
| Desktop Computer Power Sequencing | Telecom Line Card Supervision |
|---|---|
Use Scenario: Monitoring 5V, 3.3V, 2.5V, and 1.2V (via IN4 divider) rails during cold boot and dynamic load transients in ATX-compatible motherboards. IC Role / Device Role / Timing Role: Quad voltage monitor providing independent, simultaneous PWRGD signals to chipset or CPLD for sequenced enable/disable control. Use Value: Ensures CPU, memory, and I/O subsystems only activate after all required rails stabilize within −10% tolerance, preventing latch-up or configuration errors. | Use Scenario: Supervising primary 5V, auxiliary 3.3V, backplane 2.5V, and FPGA core voltage (adjusted via IN4) on carrier-grade line cards with hot-swap capability. IC Role / Device Role / Timing Role: Fault-detection node feeding status to system management controller (SMC) via wired-OR PWRGD bus. Use Value: Enables immediate power-rail fault isolation and graceful shutdown before damage occurs, meeting GR-1089 immunity requirements. |
| High-End Printer Engine Control | Data Storage Controller Board |
Use Scenario: Validating 5V logic, 3.3V interface, 2.5V sensor, and adjustable motor driver supply (e.g., 1.8V) in laser printer mainboard under varying ambient temperatures. IC Role / Device Role / Timing Role: Real-time analog supervisor generating per-rail fault flags to microcontroller interrupt lines. Use Value: Prevents print head misfire or paper jam by halting engine operation if any monitored rail deviates beyond −10% during high-current pulse events. | Use Scenario: Monitoring 5V SATA power, 3.3V controller I/O, 2.5V cache SRAM, and adjustable 1.5V DDR termination voltage on enterprise SSD controller boards. IC Role / Device Role / Timing Role: Independent rail health checker feeding status to host BMC for predictive failure logging. Use Value: Detects early-stage rail degradation (e.g., capacitor aging) before data corruption occurs, supporting SMART-based reliability reporting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6710AUB | Same µMAX package and pinout; monitors 5.0V (−5%), 3.3V (−5%), 2.5V (−5%), adjustable - tighter tolerance on fixed thresholds. | Preferred where supply specs require ±5% margin instead of ±10%; no change to PCB layout or firmware. | Select MAX6710AUB when system rails are specified to tighter tolerance and higher trip-point consistency is required. |
| TPS3307-18-33-50 | Triple voltage monitor (1.8V/3.3V/5.0V) in 16-pin TSSOP; no adjustable input; higher ICC (80µA); includes manual reset and watchdog. | Requires PCB redesign; adds MR functionality but lacks fourth channel and adjustable threshold - suitable only if third rail replaces IN4 function. | Choose only if manual reset integration and watchdog timer outweigh loss of fourth monitoring channel and adjustable flexibility. |
Compared with MAX6710AUB, the MAX6709AUB offers −10% trip points better suited for legacy or cost-optimized supplies, while the TPS3307-18-33-50 trades quad monitoring and adjustability for integrated reset control - making MAX6709AUB optimal for compact, four-rail systems prioritizing precision and minimal BOM count.
Availability
MAX6709AUB is available at Aetrix Electronics and suitable for desktop computers, telecommunications line cards, high-end printers, data storage controllers, and networking equipment requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX6709AUB 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 MAX6709 belongs to Maxim's precision voltage supervisor product line, engineered for multivoltage system integrity in space-constrained, thermally demanding applications where accuracy, low power, and factory-trimmed reliability are critical.
FAQ
What is the exact threshold voltage for each input on the MAX6709AUB?
The MAX6709AUB has factory-trimmed thresholds: IN1 = 4.50V (5.0V −10%), IN2 = 2.85V (3.3V −10%), IN3 = 2.13V (2.5V −10%), and IN4 = adjustable with 0.62V internal reference. These values are guaranteed across −40°C to +85°C with ±2.0% accuracy, as confirmed in the Electrical Characteristics table for MAX6709.
Does the MAX6709AUB require external pullup resistors on its PWRGD outputs?
No, the MAX6709AUB does not require external pullup resistors. Each PWRGD output features a 10µA internal pullup current source to VCC, sufficient to drive standard CMOS/TTL logic. External pullups are optional only when interfacing to logic supplies above VCC (up to 5.5V), and internal circuitry prevents reverse current flow.
Can the MAX6709AUB monitor a 1.8V supply?
No, the MAX6709AUB variant AUB is configured for 5.0V/3.3V/2.5V/adjustable inputs per its Selector Guide entry. To monitor 1.8V, select MAX6709CUB or MAX6709DUB - those variants specify IN3 = 1.8V (−10% = 1.53V). The AUB's IN3 is fixed at 2.5V (−10% = 2.13V) and cannot be reconfigured.
What is the purpose of the adjustable IN4 input on the MAX6709AUB?
The adjustable IN4 input on the MAX6709AUB connects directly to a comparator referenced to an internal 0.62V threshold, enabling custom voltage monitoring from 0.62V upward using an external resistor divider. This allows supervision of nonstandard rails like 1.2V, 1.5V, or 1.8V without changing the IC variant - a key differentiator versus fixed-threshold-only supervisors.
How does the MAX6709AUB behave during VCC brownout conditions?
During VCC brownout, the MAX6709AUB's internal undervoltage lockout circuit forces all four PWRGD outputs low when VCC drops below 2.0V. This behavior holds down to VCC = 1V (per Absolute Maximum Ratings), ensuring consistent fault signaling even during severe supply collapse - critical for fail-safe system shutdown sequencing.
MAX6709AUB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 2.19V, 2.93V, 4.38V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX
MAX6709AUB FAQ
1.How can I place an order for MAX6709AUB through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6709AUB 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 MAX6709AUB reliable?
The price and inventory of MAX6709AUB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6709AUB is usually 5 days.
3.What payment methods are accepted for MAX6709AUB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6709AUB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6709AUB?
MAX6709AUB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6709AUB 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 MAX6709AUB?
For technical support, including MAX6709AUB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6709AUB requirements.
6.How does Aetrix verify that MAX6709AUB is sourced from the original manufacturer or authorized distributors?
All MAX6709AUB 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 MAX6709AUB meets industry standards.
7.What is the process for return or replacement of MAX6709AUB?
All MAX6709AUB units undergo pre-shipment inspection (PSI). If there is an issue with MAX6709AUB, 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 MAX6709AUB part is unused and in its original packaging.
Return procedure for MAX6709AUB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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