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Analog Devices Inc./Maxim Integrated MAX6709EUB+T
- Part No.:
- MAX6709EUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6709EUB+T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,725
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Product details
Overview
The MAX6709EUB+T from Maxim Integrated is a quad voltage monitor IC designed for multivoltage system supervision, featuring four independent open-drain power-good outputs with 10µA internal pullups to VCC, factory-trimmed thresholds for 3.3V, 2.5V, and 1.8V supplies (±10% tolerance), and one adjustable input (0.62V reference), operating from 2.0V to 5.5V supply with only 35µA typical quiescent current - used in desktop computers, servers, and networking equipment for reliable power sequencing and fault detection.
For engineers reviewing the MAX6709EUB+T datasheet, MAX6709EUB+T pinout, MAX6709EUB+T application, or MAX6709EUB+T equivalent, this page delivers verified electrical parameters, µMAX package layout, real-world use scenarios, and validated alternative options - all confirmed against Maxim's official datasheet (Rev 1, 12/2005) and Selector Guide.
Technical Context
The MAX6709EUB+T implements four precision comparators with an internal 0.62V bandgap reference and factory-laser-trimmed resistor-divider networks for fixed-threshold inputs (IN2 = 3.3V, IN3 = 2.5V, IN4 = 1.8V), while IN1 supports adjustable monitoring down to 0.62V via external resistor dividers. Each comparator drives an independent active-low open-drain output (PWRGD1–PWRGD4) with weak 10µA internal pullup to VCC.
Hysteresis is built-in at 0.3% of threshold voltage, eliminating need for external feedback components. An undervoltage lockout circuit forces all outputs low when VCC drops below 2.0V, and operation is fully specified across –40°C to +85°C with ±2.0% threshold accuracy over temperature and supply voltage variation.
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 systems without level-shifting. |
| Quiescent Supply Current | 35µA (typ) - enables always-on supervision in battery-backed or low-power embedded systems. |
| Threshold Accuracy | ±2.0% - ensures reliable trip points across temperature and supply variations without calibration. |
| Input Threshold Options | IN1: adjustable (0.62V ref); IN2: 3.3V ±10%; IN3: 2.5V ±10%; IN4: 1.8V ±10% - matches common multirail CPU/memory I/O supply tolerances. |
| Output Type | Four independent active-low open-drain outputs (PWRGD1–PWRGD4) with 10µA internal pullup - allows wire-ORing into single system power-good signal. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and computing environments with no derating required. |
| Threshold Hysteresis | 0.3% of VTH - prevents chatter during slow or noisy supply transitions without external components. |
Pinout & Package
Package: 10-pin µMAX (3.0mm × 3.0mm, 0.6mm height, 0.5mm pitch), lead-free (RoHS-compliant), surface-mount.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN1 | Adjustable voltage monitor input - referenced to internal 0.62V comparator; requires external resistor divider to set threshold >0.62V. |
| 2 | IN2 | Fixed 3.3V ±10% monitor input - factory-trimmed for nominal 3.3V supply with trip at 2.97V (min). |
| 3 | IN3 | Fixed 2.5V ±10% monitor input - factory-trimmed for nominal 2.5V supply with trip at 2.25V (min). |
| 4 | IN4 | Fixed 1.8V ±10% monitor input - factory-trimmed for nominal 1.8V supply with trip at 1.62V (min). |
| 5 | GND | Analog/digital ground reference - must be connected directly to system ground plane for stable threshold accuracy. |
| 6 | PWRGD4 | Active-low open-drain output - asserts low when IN4 falls below 1.62V; 10µA internal pullup to VCC enables logic-level interfacing. |
| 7 | PWRGD3 | Active-low open-drain output - asserts low when IN3 falls below 2.25V; compatible with wire-ORed power-good bus. |
| 8 | PWRGD2 | Active-low open-drain output - asserts low when IN2 falls below 2.97V; supports daisy-chained reset sequencing. |
| 9 | PWRGD1 | Active-low open-drain output - asserts low when IN1 falls below user-set threshold; isolated from other outputs for flexible fault isolation. |
| 10 | VCC | Power-supply input - powers internal circuitry and provides pullup source for all PWRGD_ outputs; includes undervoltage lockout below 2.0V. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four separate voltage inputs with dedicated outputs enable granular power-rail supervision and selective fault reporting. |
| Factory-trimmed fixed thresholds | IN2/IN3/IN4 thresholds laser-trimmed to ±2.0% accuracy - eliminates external resistors and calibration for standard 3.3V/2.5V/1.8V rails. |
| Adjustable input with 0.62V reference | IN1 accepts external resistor dividers to monitor any rail ≥0.62V - supports custom voltages like 1.2V, 1.5V, or 5.0V without redesign. |
| Low-power open-drain outputs | 10µA internal pullup per PWRGD_ output reduces board space and BOM count - no external pullups needed for 3.3V/2.5V logic interfaces. |
| Built-in hysteresis | 0.3% threshold hysteresis prevents false triggering on noisy or slowly ramping supplies - no external components required. |
Applications
| Server Power Sequencing | Desktop PC Power-Good Monitoring |
|---|---|
|
Use Scenario: Supervising 12V, 5V, 3.3V, and 1.8V rails during cold start and brownout conditions in dual-CPU server motherboards. IC Role / Device Role / Timing Role: Quad voltage monitor providing independent PWRGD signals to chipset and BMC for synchronized power-up and graceful shutdown. Use Value: Ensures all rails stabilize before releasing reset - prevents CPU lockup or memory corruption during power transients. |
Use Scenario: Validating core, I/O, and memory supply integrity in ATX-compliant desktop motherboards with multiple VRMs. IC Role / Device Role / Timing Role: Generating discrete power-good flags for CPU, GPU, and chipset logic domains based on measured rail voltages. Use Value: Enables hardware-level fault isolation - e.g., PWRGD4 low indicates 1.8V memory rail failure without affecting 3.3V PCIe slot monitoring. |
| Networking Equipment Supervision | High-End Printer Power Management |
|
Use Scenario: Monitoring PoE-powered switch ASIC rails (3.3V, 2.5V, 1.8V) and auxiliary 5V bias supply in enterprise Ethernet switches. IC Role / Device Role / Timing Role: Providing early-warning fault signals to microcontroller for dynamic load shedding and thermal throttling. Use Value: Detects marginal 2.5V rail droop before ASIC functional failure - triggers fan speed increase or port disable prior to system crash. |
Use Scenario: Verifying heater, motor driver, and logic supply stability during warm-up and print cycles in multifunction laser printers. IC Role / Device Role / Timing Role: Asserting individual PWRGD outputs to enable stepper motor drivers only after 24V heater rail reaches target voltage. Use Value: Prevents mechanical damage from premature actuator movement - ties motor enable directly to PWRGD3 (2.5V logic rail) status. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6710EUB+T | Same pinout and function as MAX6709EUB+T but with ±5% tolerance on IN2/IN3/IN4 thresholds instead of ±10% - tighter trip points for high-precision rails. | Preferred where 3.3V/2.5V/1.8V supplies require stricter regulation (e.g., FPGA I/O banks), but less tolerant of nominal rail drift. | Select MAX6710EUB+T if system design specifies ≤±5% supply tolerance; otherwise MAX6709EUB+T provides robust margin for legacy or cost-sensitive designs. |
| TPS3307-33DGNR | Triple voltage monitor (not quad); 3.3V/2.5V/1.8V fixed thresholds; 200ms reset timeout; 1.2µA quiescent current - lower power but lacks adjustable input and fourth channel. | Suitable for simpler systems needing only three rails; cannot replace MAX6709EUB+T in quad-monitoring or adjustable-input applications. | Choose TPS3307-33DGNR only when fourth rail monitoring is unnecessary and ultra-low ICC (<1µA) is critical - not a drop-in replacement. |
Compared with MAX6709EUB+T, MAX6710EUB+T offers tighter threshold accuracy at the cost of reduced tolerance margin, while TPS3307-33DGNR sacrifices one monitoring channel and adjustable capability for significantly lower supply current - selection depends strictly on required rail count, accuracy budget, and power constraints.
Availability
The MAX6709EUB+T is available at Aetrix Electronics and suitable for server power sequencing, desktop PC power-good monitoring, and networking equipment supervision requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6709EUB+T 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 MAX6709EUB+T belongs to Maxim's voltage supervisor product line, engineered specifically for multivoltage system reliability - delivering accurate, low-power, component-minimized power-rail monitoring in compact µMAX packages.
FAQ
What is the function of the IN1 pin on the MAX6709EUB+T?
The IN1 pin on the MAX6709EUB+T is an adjustable voltage monitor input referenced to an internal 0.62V comparator threshold. It requires an external resistor divider to set the trip point for supplies above 0.62V - for example, a 1.2V rail can be monitored by selecting R1/R2 to scale 1.2V down to 0.62V at IN1. This flexibility makes MAX6709EUB+T adaptable to nonstandard supply voltages without changing the IC.
Does the MAX6709EUB+T provide reset timing or timeout functionality?
No, the MAX6709EUB+T does not include built-in reset timing or timeout functionality. It provides only four independent, immediate-response power-good outputs (PWRGD1–PWRGD4) that assert low as soon as their respective input falls below threshold. For reset timeout features (e.g., 140ms minimum assertion), the MAX6714 series - not MAX6709EUB+T - must be used.
Can the MAX6709EUB+T monitor a 5.0V supply?
The MAX6709EUB+T variant is configured per its Selector Guide to monitor adjustable (IN1), 3.3V (IN2), 2.5V (IN3), and 1.8V (IN4) supplies - it does not natively support 5.0V monitoring. To supervise a 5.0V rail, use the IN1 adjustable input with an external resistor divider (e.g., R1 = 619kΩ, R2 = 1MΩ) to scale 5.0V to 0.62V, ensuring MAX6709EUB+T remains fully functional for that rail.
What is the maximum sink current supported by each PWRGD output of the MAX6709EUB+T?
Each PWRGD output of the MAX6709EUB+T supports up to 2mA sink current while maintaining VOL ≤ 0.3V (tested at VCC = 5V). At lower VCC (e.g., 2.5V), the guaranteed sink capability reduces to 1.2mA. This rating ensures compatibility with standard CMOS/TTL inputs and permits direct connection to microcontroller GPIO pins without external buffering.
Is the MAX6709EUB+T pin-compatible with other devices in the MAX6709/MAX6714 family?
Yes, all MAX6709 variants (including MAX6709EUB+T) share identical 10-pin µMAX pinout and footprint with the MAX6714 series. However, internal functionality differs: MAX6709EUB+T provides four PWRGD outputs, while MAX6714 variants offer RESET + three PFO outputs. Thus, PCB layout is interchangeable, but firmware and external circuitry must match the selected device's output architecture.
MAX6709EUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX6709EUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6709EUB+T 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+T reliable?
The price and inventory of MAX6709EUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6709EUB+T is usually 5 days.
3.What payment methods are accepted for MAX6709EUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6709EUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6709EUB+T?
MAX6709EUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6709EUB+T 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+T?
For technical support, including MAX6709EUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6709EUB+T requirements.
6.How does Aetrix verify that MAX6709EUB+T is sourced from the original manufacturer or authorized distributors?
All MAX6709EUB+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX6709EUB+T?
All MAX6709EUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6709EUB+T, 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+T part is unused and in its original packaging.
Return procedure for MAX6709EUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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