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Analog Devices Inc./Maxim Integrated MAX6339AUT-T
- Part No.:
- MAX6339AUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6339AUT-T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,400
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Product details
Overview
MAX6339AUT-T from Maxim Integrated is a precision quad voltage supervisory IC that monitors +5.0V, +3.3V, +2.5V, and one user-adjustable input (based on 1.23V internal reference) in multi-rail systems. It asserts a single active-low open-drain RESET output when any monitored supply falls below its threshold, with guaranteed operation down to IN1 or IN2 ≥ 1.0V and a minimum 140ms reset timeout. Used in telecom and industrial computing for reliable power-up sequencing and brownout detection.
For engineers reviewing the MAX6339AUT-T datasheet, MAX6339AUT-T pinout, MAX6339AUT-T application, or MAX6339AUT-T equivalent, key selection criteria include factory-trimmed thresholds for +5V/−10%, +3.3V/−10%, +2.5V/−10%, adjustable −5% tolerance support, 55µA supply current, SOT23-6 package compatibility, and immunity to short supply transients.
Technical Context
The MAX6339AUT-T integrates four precision comparators with an internal bandgap reference (1.23V) and factory-trimmed resistor-divider networks for fixed thresholds. Each comparator features 0.3% hysteresis to suppress noise-induced false resets without degrading accuracy at nominal voltage.
It operates from IN2 (3.3V supply), powers all internal circuitry, and maintains valid RESET assertion as long as IN1 or IN2 remains ≥ 1.0V - enabling robust supervision during partial rail collapse. The open-drain RESET output includes a 10µA internal pullup to IN2, eliminating need for external pullup in many 3.3V logic interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| +5V Threshold | 4.50V min (−10% of 5.0V); ensures reset assertion before critical digital logic fails |
| +3.3V Threshold | 3.00V min (−10% of 3.3V); supports 3.3V I/O rail monitoring with margin |
| +2.5V Threshold | 2.13V min (−10% of 2.5V); enables core voltage supervision for low-voltage ASICs |
| Adjustable Input | 1.23V ±0.03V internal reference; allows custom thresholds via external resistor divider |
| Reset Timeout | 140ms min; guarantees sufficient hold time for microprocessor initialization |
| Supply Current | 55µA typ at VIN2 = 3.3V; minimizes load on monitored 3.3V rail |
| Operating Temp | −40°C to +85°C; qualified for industrial and telecom equipment environments |
Pinout & Package
The MAX6339AUT-T is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and lead-free finish (RoHS compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN1 | +5.0V monitor input | Fixed −10% threshold (4.50V); must be connected to 5V rail or tied high if unused |
| 2 - IN2 | Power supply & +3.3V monitor input | Supplies internal circuitry; also serves as second monitored rail (3.00V min threshold) |
| 3 - IN3 | +2.5V monitor input | Fixed −10% threshold (2.13V); requires connection to 2.5V rail or tie-high if unused |
| 4 - IN4 | User-adjustable monitor input | Accepts external resistor divider; internal 1.23V reference sets threshold via VTH = 1.23V × (R1+R2)/R2 |
| 5 - GND | Analog/digital ground reference | Common return for all inputs and internal comparators; must connect to system ground plane |
| 6 - RESET | Active-low open-drain reset output | Asserted low during fault; pulled up internally to IN2 (10µA); compatible with 1.8V–5.5V logic |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent voltage monitoring | Simultaneously supervises four rails without external components - reduces BOM count and PCB area vs discrete solutions |
| Factory-trimmed precision thresholds | ±1.5% initial accuracy over temperature; eliminates manual calibration and external resistors for standard rails |
| 0.3% comparator hysteresis | Rejects <100µs transients on monitored supplies - prevents spurious resets in noisy industrial environments |
| 1.0V minimum valid supply voltage | RESET remains asserted while IN1 or IN2 ≥ 1.0V - ensures supervision integrity during deep brownout conditions |
| Low quiescent current | 55µA typical at 3.3V - avoids loading sensitive 3.3V auxiliary rails in battery-backed or low-power systems |
Applications
| Telecommunications Equipment | Industrial Control Systems |
|---|---|
Use Scenario: Monitoring multiple power rails (+5V, +3.3V, +2.5V) in line cards and baseband processing units subject to voltage sags during hot-swap events. IC Role / Device Role / Timing Role: Quad voltage supervisor providing synchronized reset assertion across all rails to prevent firmware corruption during partial power loss. Use Value: 140ms minimum reset timeout ensures full FPGA configuration and DSP boot sequence completion before release. |
Use Scenario: Supervising PLC I/O module power supplies where transient immunity and extended temperature operation are critical. IC Role / Device Role / Timing Role: Fault-detection interface between field power inputs and microcontroller reset logic, operating reliably from −40°C to +85°C. Use Value: 0.3% hysteresis and guaranteed operation down to 1.0V on IN1/IN2 enable stable reset behavior during slow-ramp brownouts. |
| Network Attached Storage (NAS) | High-End Printers |
Use Scenario: Ensuring clean power-up sequencing for dual-core ARM SoC, DDR3 memory, and SATA controller rails in compact NAS enclosures. IC Role / Device Role / Timing Role: Centralized reset generator coordinating power-good signals from +5V (HDD), +3.3V (SoC I/O), +2.5V (DDR3), and adjustable rail (USB PHY). Use Value: SOT23-6 footprint saves board space versus discrete supervisors; 55µA supply current minimizes impact on standby power budget. |
Use Scenario: Managing complex power domains in multifunction printers including scanner sensor bias, motor driver, and main controller rails. IC Role / Device Role / Timing Role: System-level watchdog that triggers hard reset upon undervoltage on any of four critical subsystems. Use Value: Adjustable IN4 input allows precise supervision of non-standard rails (e.g., 12V heater supply scaled to 1.23V reference). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3307-33D | Triple monitor (+3.3V, +5V, adjustable); no −5V option; 200ms fixed timeout; 100µA supply current | Lacks fourth monitor channel; higher current draw limits use in ultra-low-power designs | Select when only three rails require supervision and longer timeout is acceptable |
| ADM1085AKSZ-REEL7 | Dual monitor (+3.3V, +5V); 140ms timeout; 30µA supply current; no adjustable input | Supports only two rails; lacks flexibility for mixed-voltage systems with >2 supplies | Prefer for cost-sensitive dual-rail applications where third/fourth rail supervision is unnecessary |
Compared with TPS3307-33D and ADM1085AKSZ-REEL7, the MAX6339AUT-T uniquely delivers four independent monitoring channels-including one user-adjustable input-in a single SOT23-6 package with industry-leading 55µA quiescent current and guaranteed 1.0V minimum supply validity.
Availability
MAX6339AUT-T is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial control systems, and network-attached storage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6339AUT-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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX6339AUT-T belongs to Maxim's µP supervisory product line, engineered specifically for compact, multi-rail power integrity assurance in space-constrained and thermally demanding applications.
FAQ
What is the exact threshold voltage for each input on the MAX6339AUT-T?
The MAX6339AUT-T has factory-trimmed thresholds: IN1 = +5.0V (−10% = 4.50V min), IN2 = +3.3V (−10% = 3.00V min), IN3 = +2.5V (−10% = 2.13V min), and IN4 = adjustable via external resistor divider referenced to 1.23V. These values are specified in the Electrical Characteristics table and guaranteed over −40°C to +85°C.
Can the MAX6339AUT-T monitor a negative voltage like −12V?
The MAX6339AUT-T does not natively support −12V monitoring. Its IN4 pin is designed for positive adjustable thresholds based on a 1.23V internal reference. To supervise −12V, an external resistor divider must scale the negative rail to match the 1.23V reference - but this requires careful design to avoid violating absolute maximum ratings on the IN4 pin (−6V to +0.3V). The MAX6339MUT/NUT variants are optimized for −5V monitoring.
Is an external pullup resistor required for the RESET output of the MAX6339AUT-T?
No external pullup is required in most cases. The MAX6339AUT-T includes a 10µA internal pullup to IN2, sufficient to drive standard CMOS inputs powered from the same 3.3V rail. An external pullup is only needed when interfacing with logic operating at a different voltage (e.g., 1.8V or 5V), and must be sized to override the internal pullup without exceeding 20mA sink current rating.
How does the MAX6339AUT-T behave when IN2 drops below 1.0V?
When IN2 falls below 1.0V, the MAX6339AUT-T can no longer guarantee correct RESET output state. The device specifies RESET validity only when IN1 ≥ 1.0V *or* IN2 ≥ 1.0V. Below that, internal circuitry may become unpowered, causing RESET to float or behave unpredictably - so system design must ensure at least one monitored rail stays above 1.0V during fault conditions.
What is the maximum transient duration the MAX6339AUT-T can ignore on monitored inputs?
The MAX6339AUT-T rejects transients ≤ 100µs in duration when the monitored voltage undershoots its threshold by ≤ 100mV, as shown in the Typical Operating Characteristics graph "Maximum IN_ Transient Duration vs. Reset Threshold Overdrive". This immunity is enabled by internal comparator hysteresis and filtering, preventing false resets from switching noise or ESD coupling.
MAX6339AUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6339AUT-T FAQ
1.How can I place an order for MAX6339AUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6339AUT-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 MAX6339AUT-T reliable?
The price and inventory of MAX6339AUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6339AUT-T is usually 5 days.
3.What payment methods are accepted for MAX6339AUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6339AUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6339AUT-T?
MAX6339AUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6339AUT-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 MAX6339AUT-T?
For technical support, including MAX6339AUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6339AUT-T requirements.
6.How does Aetrix verify that MAX6339AUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6339AUT-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 MAX6339AUT-T meets industry standards.
7.What is the process for return or replacement of MAX6339AUT-T?
All MAX6339AUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6339AUT-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 MAX6339AUT-T part is unused and in its original packaging.
Return procedure for MAX6339AUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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