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Analog Devices Inc./Maxim Integrated MAX6339GUT
- Part No.:
- MAX6339GUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6339GUT.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,394
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Product details
Overview
MAX6339GUT from Maxim Integrated is a quad voltage supervisory IC that monitors +5.0V, +3.0V, +1.8V, and adjustable-threshold supplies in multi-rail systems, asserting a single active-low RESET when any input falls below its factory-trimmed threshold. It operates from IN2 (3.0V supply), draws only 55µA, features 140ms min reset timeout, and supports operation from –40°C to +85°C in telecom and industrial computing.
For engineers reviewing the MAX6339GUT datasheet, MAX6339GUT pinout, MAX6339GUT application, or MAX6339GUT equivalent, key selection criteria include its fixed +5.0V/–10%, +3.0V/–10%, +1.8V/–10% thresholds, open-drain RESET with internal 10µA pullup to IN2, and guaranteed validity down to IN1 or IN2 = 1V - critical for brownout resilience in embedded power sequencing.
Technical Context
The MAX6339GUT integrates four precision comparators with an internal 1.23V bandgap reference and factory-trimmed resistor-divider networks for fixed thresholds on IN1 (+5.0V), IN2 (+3.0V), and IN3 (+1.8V); IN4 is user-adjustable via external resistor divider. Each comparator includes 0.3% hysteresis to reject noise without compromising accuracy.
Power is derived solely from IN2, and RESET remains valid as long as IN1 ≥ 1V or IN2 ≥ 1V. The open-drain output drives low when any monitored voltage violates its threshold (or exceeds it for negative options) and holds low for ≥140ms after all inputs recover - ensuring reliable µP reset assertion during supply recovery transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| +5.0V Threshold | 4.25V to 4.50V (–10% tolerance; ensures reset at 90% of nominal rail) |
| +3.0V Threshold | 2.55V to 2.70V (–10% tolerance; triggers reset before logic fails) |
| +1.8V Threshold | 1.53V to 1.62V (–10% tolerance; safeguards low-voltage core domains) |
| Adjustable Threshold | 1.20V to 1.26V (internal reference; sets external divider ratio for custom rails) |
| Reset Timeout | 140ms minimum (guarantees µP reset hold time after full supply recovery) |
| Supply Current | 55µA typical (enables always-on supervision in battery-backed systems) |
| Operating Temp | –40°C to +85°C (supports industrial-grade thermal reliability) |
| RESET Validity | Valid down to IN1 = 1V or IN2 = 1V (ensures reset integrity during deep brownout) |
Pinout & Package
The MAX6339GUT is housed in a 6-pin SOT23-6 package (body size 2.9mm × 1.6mm × 1.1mm), optimized for space-constrained PCB layouts in telecom and computing equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN1 | +5.0V monitor input (–10% threshold) | Monitors primary system rail; reset asserted if voltage drops below 4.25V |
| 2 IN2 | +3.0V monitor input & device power supply (–10% threshold) | Provides VCC and monitors secondary rail; device remains functional down to 1V |
| 3 IN3 | +1.8V monitor input (–10% threshold) | Supervises low-voltage I/O or core domain; triggers reset at ≤1.53V |
| 4 IN4 | Adjustable-threshold input (1.23V reference) | Accepts external resistor divider for custom voltage monitoring (e.g., 2.8V, 1.5V) |
| 5 GND | Analog/digital ground reference | Common return path for all comparators and internal circuitry |
| 6 RESET | Active-low open-drain reset output | Drives low during fault; internal 10µA pullup to IN2 eliminates need for external resistor in many cases |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent voltage monitoring | Simultaneously supervises four distinct supply rails with no external components required for standard thresholds |
| Factory-trimmed precision thresholds | ±1.5% initial accuracy over temperature (60ppm/°C drift) ensures deterministic reset behavior across industrial range |
| Open-drain RESET with internal pullup | 10µA weak pullup to IN2 enables direct interface to 1.8V–5.5V logic without external biasing |
| Glitch-immune transient rejection | Rejects input transients < 200µs (at 50mV overdrive), preventing false resets in noisy environments |
| No external components for fixed thresholds | Eliminates BOM count and layout area vs. discrete supervisor solutions - reduces system footprint by >40% |
Applications
| Telecommunications Equipment | Industrial Control Systems |
|---|---|
Use Scenario: Monitoring multiple rails (+5V backplane, +3.0V FPGA core, +1.8V SerDes, and custom analog supply) in carrier-grade line cards. IC Role / Device Role / Timing Role: Quad voltage supervisor providing synchronized reset assertion and 140ms hold time to ensure orderly boot sequence after power-up or brownout. Use Value: Prevents partial initialization and latch-up by guaranteeing all rails are stable before releasing µP reset - critical for protocol stack integrity. | Use Scenario: Supervising PLC power domains including +5V I/O, +3.0V microcontroller, +1.8V sensor interface, and adjustable 2.4V analog reference. IC Role / Device Role / Timing Role: Single-chip solution replacing four discrete supervisors, reducing failure points and enabling compact DIN-rail mount design. Use Value: 55µA quiescent current extends backup battery life; –40°C to +85°C rating ensures operation in unconditioned cabinets. |
| Network Attached Storage | High-End Printers |
Use Scenario: Ensuring clean power-up of dual-core ARM SoC (1.8V core, 3.0V I/O), +5V HDD controller, and adjustable 3.3V fan control supply. IC Role / Device Role / Timing Role: Voltage monitor generating unified RESET signal to SoC and peripheral controllers, coordinated with 140ms timeout. Use Value: Eliminates race conditions between storage controller and host processor during cold start - prevents data corruption on RAID initialization. | Use Scenario: Managing complex power tree in multifunction printers: +5V logic, +3.0V imaging ASIC, +1.8V memory interface, and adjustable 2.7V motor driver supply. IC Role / Device Role / Timing Role: Centralized supervision with adjustable IN4 enabling precise motor voltage margining without extra ICs. Use Value: Reduces bill-of-materials cost by 60% vs. discrete solution while improving thermal reliability through integrated hysteresis (0.3%) |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6340GUT | Same pinout and function but with +5.0V/–10%, +3.3V/–10%, +2.5V/–10%, adjustable IN4 | Targets systems using +3.3V/2.5V rails instead of +3.0V/1.8V; not drop-in for MAX6339GUT's specific threshold set | Select when monitoring +3.3V and +2.5V instead of +3.0V and +1.8V; verify compatibility with existing firmware reset timing |
| TPS3307-33D | Triple voltage monitor (+3.3V, +3.3V, +3.3V) with manual reset input; no adjustable threshold or -5V option | Lacks fourth monitor channel and adjustable IN4; requires external components for non-standard rails | Use only if exactly three identical +3.3V rails require supervision and manual reset capability is needed |
Compared with MAX6340GUT and TPS3307-33D, the MAX6339GUT uniquely delivers the exact combination of +5.0V/–10%, +3.0V/–10%, +1.8V/–10%, and adjustable IN4 in a 6-pin SOT23 - enabling direct replacement in legacy designs without layout changes or firmware updates.
Availability
MAX6339GUT is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial control systems, and network-attached storage requiring stable component supply and guaranteed long-term availability.
Supply support for MAX6339GUT 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, mixed-signal, and high-reliability semiconductor solutions for industrial, communications, and computing markets.
The MAX6339GUT belongs to Maxim's µP supervisory product line, engineered specifically for compact, low-power multi-rail voltage monitoring in space- and power-constrained embedded systems.
FAQ
What voltage rails does the MAX6339GUT monitor?
The MAX6339GUT monitors four inputs: IN1 at +5.0V (–10% threshold), IN2 at +3.0V (–10% threshold, also powers the device), IN3 at +1.8V (–10% threshold), and IN4 as user-adjustable via external resistor divider referenced to 1.23V. This configuration matches the "G" variant per Maxim's Selector Guide, confirmed in the datasheet's ordering table.
How does the MAX6339GUT generate its reset timeout period?
The MAX6339GUT asserts RESET low when any monitored voltage drops below its threshold and holds it low for a minimum of 140ms after all inputs exceed their thresholds. This timeout is internally generated and guaranteed over –40°C to +85°C; typical value is 200ms, with max 280ms. The timing is independent of external components.
Can the MAX6339GUT operate if IN2 drops below 3.0V?
Yes - the MAX6339GUT remains functional and guarantees valid RESET output as long as either IN1 ≥ 1V or IN2 ≥ 1V. Its operating supply range is specified from 1.0V to 5.5V on IN2, enabling robust brownout detection and reset assertion even during severe undervoltage events.
What is the purpose of the 0.3% hysteresis in the MAX6339GUT comparators?
The 0.3% hysteresis on each comparator prevents oscillation during slow-moving or noisy supply transitions near threshold. For example, the +3.0V input triggers reset at 2.55V (falling) but requires recovery to ~2.558V (rising) before deassertion - eliminating chatter without degrading accuracy, as confirmed in the Electrical Characteristics table.
Is an external pullup resistor required for the MAX6339GUT RESET pin?
No - the MAX6339GUT includes a 10µA internal pullup to IN2, sufficient to drive standard CMOS inputs when interfacing with logic powered from the same IN2 rail. An external pullup is only needed when driving logic with a different supply voltage (e.g., 5V logic while IN2 = 3.0V), as detailed in the Applications Information section.
MAX6339GUT 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:
- 1.58V, 2.63V, 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
MAX6339GUT FAQ
1.How can I place an order for MAX6339GUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6339GUT 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 MAX6339GUT reliable?
The price and inventory of MAX6339GUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6339GUT is usually 5 days.
3.What payment methods are accepted for MAX6339GUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6339GUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6339GUT?
MAX6339GUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6339GUT 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 MAX6339GUT?
For technical support, including MAX6339GUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6339GUT requirements.
6.How does Aetrix verify that MAX6339GUT is sourced from the original manufacturer or authorized distributors?
All MAX6339GUT 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 MAX6339GUT meets industry standards.
7.What is the process for return or replacement of MAX6339GUT?
All MAX6339GUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6339GUT, 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 MAX6339GUT part is unused and in its original packaging.
Return procedure for MAX6339GUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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