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Analog Devices Inc./Maxim Integrated MAX6709EUB+
- Part No.:
- MAX6709EUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6709EUB+.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,709
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Product details
Overview
The MAX6709EUB+ from Maxim Integrated is a quad voltage monitor IC for multivoltage system supervision, featuring four independent active-low open-drain outputs with 10µA internal pullups to VCC, factory-trimmed thresholds for adjustable/3.3V/2.5V/1.8V supplies at ±2.0% accuracy, and operation from 2.0V to 5.5V supply. It delivers low 35µA typical supply current and supports power-good signaling in desktop computers and data storage equipment.
For engineers reviewing the MAX6709EUB+ datasheet, MAX6709EUB+ pinout, MAX6709EUB+ application, or MAX6709EUB+ equivalent, this page provides verified functional identity, confirmed pin roles, exact threshold configuration (IN1 = adjustable, IN2 = 3.3V, IN3 = 2.5V, IN4 = 1.8V, 10% tolerance), true package mapping (10-pin µMAX), and two validated alternative parts with documented technical differences.
Technical Context
The MAX6709EUB+ integrates four precision comparators with an internal 0.62V bandgap reference and factory-laser-trimmed resistor-divider networks for fixed thresholds; its IN1 input is configured as adjustable (0.609V–0.635V threshold), while IN2, IN3, and IN4 are preset to 3.3V (−10%), 2.5V (−10%), and 1.8V (−10%) nominal supplies respectively. Each comparator drives an independent open-drain output with weak internal pullup, enabling wire-ORed power-good logic.
An 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 without external components. The device operates across −40°C to +85°C with 60ppm/°C threshold temperature coefficient and maintains ±2.0% accuracy over full temperature and supply range.
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, 2.5V, and 1.8V supplies without level-shifting. |
| Supply Current (typ) | 35µA - enables always-on monitoring in battery-backed or low-power embedded systems without significant load impact. |
| Threshold Accuracy | ±2.0% - ensures reliable detection of 10% supply droop (e.g., 1.8V rail fails at ≤1.62V) across industrial temperature range. |
| Input Thresholds | IN1: adjustable (0.609–0.635V); IN2: 3.3V (−10% = 2.97V); IN3: 2.5V (−10% = 2.25V); IN4: 1.8V (−10% = 1.62V) - matches common multirail CPU/memory I/O supply tolerances. |
| Output Type | Four independent active-low open-drain outputs (PWRGD1–PWRGD4) with 10µA internal pullup to VCC - allows flexible logic interfacing and wire-ORed system power-good assertion. |
| Operating Temperature | −40°C to +85°C - qualified for deployment in servers, networking gear, and industrial computing environments. |
| Package | 10-pin µMAX (3.0mm × 3.0mm, 0.6mm height) - compact footprint suitable for space-constrained PCB layouts in high-density computing modules. |
Pinout & Package
Package: 10-pin µMAX (3.0mm × 3.0mm, 0.6mm height, exposed pad), lead-free per RoHS, rated for −40°C to +85°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN1 | Adjustable threshold input - connects to external resistor divider; monitors voltages ≥0.62V with factory-trimmed 0.623V reference. |
| 2 | IN2 | Fixed 3.3V supply monitor input - asserts PWRGD2 low when voltage falls below 2.97V (−10% tolerance). |
| 3 | IN3 | Fixed 2.5V supply monitor input - asserts PWRGD3 low when voltage falls below 2.25V (−10% tolerance). |
| 4 | IN4 | Fixed 1.8V supply monitor input - asserts PWRGD4 low when voltage falls below 1.62V (−10% tolerance). |
| 5 | GND | Analog/digital ground reference - must be connected to system ground plane for stable comparator operation. |
| 6 | PWRGD4 | Active-low open-drain output - sinks current when IN4 < threshold; pulled up internally to VCC (10µA) for direct CMOS/TTL interface. |
| 7 | PWRGD3 | Active-low open-drain output - sinks current when IN3 < threshold; compatible with wire-ORed power-good bus. |
| 8 | PWRGD2 | Active-low open-drain output - sinks current when IN2 < threshold; shares same electrical characteristics as PWRGD3/PWRGD4. |
| 9 | PWRGD1 | Active-low open-drain output - sinks current when IN1 < threshold; supports adjustable monitoring of auxiliary rails (e.g., 1.2V, 1.5V). |
| 10 | VCC | Power supply input - powers internal circuitry; undervoltage lockout disables all outputs if VCC < 2.0V. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four separate comparators with dedicated inputs and outputs eliminate need for discrete supervisor ICs in multirail systems. |
| Factory-trimmed thresholds | IN2/IN3/IN4 set to precise −10% trip points for 3.3V/2.5V/1.8V rails; reduces BOM count and layout complexity vs. resistor-based solutions. |
| Adjustable IN1 input | 0.623V internal reference enables accurate monitoring of any rail ≥0.62V using two external resistors - supports custom voltage domains. |
| Low quiescent current | 35µA typical ICC allows continuous supervision in always-on subsystems without compromising battery life or thermal budget. |
| Built-in hysteresis | 0.3% of threshold voltage prevents chatter during slow supply ramps or noise transients - no external feedback components required. |
| Wire-ORable outputs | All PWRGD_ pins feature open-drain structure with internal 10µA pullup - simplifies system-level power-good aggregation without external logic. |
Applications
| Desktop Computer Power Sequencing | Server Board Voltage Supervision |
|---|---|
Use Scenario: Monitoring 12V, 5V, 3.3V, and 1.8V rails during boot and runtime in ATX-compliant motherboards. IC Role / Device Role / Timing Role: Quad voltage monitor asserting individual PWRGD signals to chipset or EC to gate clock enable and reset release timing. Use Value: Ensures all critical rails meet −10% tolerance before releasing processor reset, preventing boot failures due to marginal supply conditions. |
Use Scenario: Real-time supervision of CPU core, memory, I/O, and auxiliary rails on dual-socket server boards. IC Role / Device Role / Timing Role: Provides independent fault signaling per rail via PWRGD1–PWRGD4 to BMC for logging and graceful shutdown initiation. Use Value: Enables targeted rail-level diagnostics instead of blanket system reset, improving uptime and serviceability in datacenter environments. |
| High-End Printer Logic Supply Monitoring | Industrial Data Storage Controller |
Use Scenario: Verifying stability of FPGA I/O (3.3V), microcontroller core (1.8V), motor driver (2.5V), and sensor interface (adjustable) supplies. IC Role / Device Role / Timing Role: Generates synchronized PWRGD assertions to halt print engine sequencing until all supplies settle within spec. Use Value: Prevents mechanical misalignment or image corruption caused by premature actuator activation under undervoltage conditions. |
Use Scenario: Supervising 3.3V SATA controller, 2.5V SSD interface, 1.8V PHY, and adjustable 1.2V FPGA core rails in RAID enclosures. IC Role / Device Role / Timing Role: Drives hardware reset lines and status LEDs via open-drain outputs to indicate rail-specific faults to host controller. Use Value: Supports hot-swap readiness verification and predictive failure alerts by isolating which rail triggered a fault condition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6714EUB+ | Includes RESET output with 140ms timeout, MR input, and three PFI/PFO channels; lacks fourth PWRGD output; higher 60µA supply current. | Designed for µP reset generation and power-fail warning rather than pure quad power-good signaling. | Select when system requires integrated reset timing and manual reset capability alongside three monitored rails. |
| TPS3307-33DGNR | Triple voltage monitor (not quad); 3.3V/2.5V/1.8V fixed thresholds only; no adjustable input; 16-pin HVSSOP package. | Supports fewer rails and lacks flexibility for custom voltage domains; larger footprint limits high-density use. | Choose only if exactly three rails need monitoring and board space permits larger package. |
Compared with MAX6714EUB+, the MAX6709EUB+ provides four independent PWRGD outputs ideal for parallel rail validation but omits reset timing and manual reset. Versus TPS3307-33DGNR, it adds a fourth rail and adjustable threshold at smaller size, making it superior for compact multivoltage systems requiring full rail visibility.
Availability
The MAX6709EUB+ is available at Aetrix Electronics and suitable for desktop computers, data storage equipment, and networking equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6709EUB+ 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 MAX6709EUB+ belongs to Maxim's low-voltage quad voltage monitor product line, engineered specifically for accurate, low-power supervision of multiple supply rails in multivoltage computing and communications platforms.
FAQ
What is the exact threshold configuration for MAX6709EUB+?
The MAX6709EUB+ is configured with IN1 as adjustable (0.609V–0.635V internal reference), IN2 set to 3.3V (−10% = 2.97V trip), IN3 to 2.5V (−10% = 2.25V trip), and IN4 to 1.8V (−10% = 1.62V trip). This specific variant is defined in Maxim's Selector Guide and confirmed in the device's ordering information table.
Does MAX6709EUB+ include reset timing or manual reset functionality?
No, the MAX6709EUB+ does not include reset timing or manual reset (MR) functionality. It provides only four independent PWRGD outputs. Those features are exclusive to the MAX6714 series; the MAX6709EUB+ is strictly a quad voltage monitor without integrated reset generation or MR input.
Can MAX6709EUB+ monitor a 1.2V supply?
Yes, MAX6709EUB+ can monitor a 1.2V supply using its adjustable IN1 input. With the internal 0.623V reference, a resistor divider (e.g., R1 = 93kΩ, R2 = 100kΩ) scales 1.2V down to ~0.623V at IN1, enabling accurate −10% trip at 1.08V. The datasheet confirms adjustable operation down to 0.62V input threshold.
What is the maximum sink current capability of MAX6709EUB+ outputs?
The MAX6709EUB+ PWRGD outputs are open-drain with guaranteed VOL ≤ 0.3V at ISINK = 2mA (VCC = 5V) and ≤ 0.3V at ISINK = 1.2mA (VCC = 2.5V). Absolute maximum rating is 20mA per pin, but design guidance recommends staying within 2mA for reliable CMOS/TTL interfacing and thermal safety.
Is MAX6709EUB+ pin-compatible with other MAX6709 variants?
Yes, all MAX6709 variants-including MAX6709EUB+-share identical 10-pin µMAX pinout and electrical interface. Only the internal threshold configurations differ between variants (e.g., MAX6709BUB+ uses 5%/3.3%/2.5%/Adj*, while MAX6709EUB+ uses Adj*/3.3%/2.5%/1.8%). No PCB changes are needed when substituting within the MAX6709 family.
MAX6709EUB+ 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:
- 1.58V, 2.19V, 2.93V, 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
MAX6709EUB+ FAQ
1.How can I place an order for MAX6709EUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6709EUB+ 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 MAX6709EUB+ reliable?
The price and inventory of MAX6709EUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6709EUB+ is usually 5 days.
3.What payment methods are accepted for MAX6709EUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6709EUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6709EUB+?
MAX6709EUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6709EUB+ 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 MAX6709EUB+?
For technical support, including MAX6709EUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6709EUB+ requirements.
6.How does Aetrix verify that MAX6709EUB+ is sourced from the original manufacturer or authorized distributors?
All MAX6709EUB+ 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 MAX6709EUB+ meets industry standards.
7.What is the process for return or replacement of MAX6709EUB+?
All MAX6709EUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6709EUB+, 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 MAX6709EUB+ part is unused and in its original packaging.
Return procedure for MAX6709EUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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