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Analog Devices Inc./Maxim Integrated MAX6339NUT+T
- Part No.:
- MAX6339NUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6339NUT+T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,636
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Product details
Overview
MAX6339NUT+T from Maxim Integrated is a quad voltage supervisory IC that monitors +5.0V, +3.0V, user-adjustable, and -5.0V supply rails with ±5% threshold tolerance. It delivers a single active-low open-drain RESET output with 140ms minimum timeout, operates from -40°C to +85°C, and draws only 55µA quiescent current. It is used in industrial equipment and networking gear to ensure reliable power-on reset sequencing.
For engineers reviewing the MAX6339NUT+T datasheet, MAX6339NUT+T pinout, MAX6339NUT+T application, or MAX6339NUT+T equivalent, key selection criteria include its factory-trimmed -5V monitoring capability, dual fixed +5V/+3V thresholds, adjustable third input, guaranteed 1V operating headroom on IN1/IN2, and SOT23-6 footprint compatibility with space-constrained embedded systems.
Technical Context
The MAX6339NUT+T integrates four precision comparators with an internal 1.23V bandgap reference and factory-trimmed resistor-divider networks for fixed thresholds (+5.0V at -5%, +3.0V at -5%) and one user-adjustable input (1.23V nominal threshold). Its -5V monitoring channel uses inverted logic (asserts RESET when input rises above threshold).
RESET timing is governed by an internal timeout circuit ensuring ≥140ms assertion after all inputs recover; the open-drain output features a 10µA internal pullup to IN2 and remains valid as long as IN1 ≥1V or IN2 ≥1V - enabling robust operation during brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| +5V Threshold | 4.25V to 4.50V (-10% tolerance) - ensures reset assertion before critical digital logic fails |
| +3.0V Threshold | 2.55V to 2.70V (-10% tolerance) - matches common low-voltage microcontroller supply rails |
| -5V Threshold | -4.50V to -4.25V (+10% tolerance) - supports legacy analog or RS-232 interface supplies |
| Adjustable Input Threshold | 1.20V to 1.26V - enables custom monitoring of auxiliary rails via external resistor divider |
| Reset Timeout | 140ms to 280ms - guarantees sufficient hold time for CPU initialization and PLL lock |
| Supply Current | 55µA typical - minimizes impact on system standby power budget |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade deployment without derating |
Pinout & Package
The MAX6339NUT+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN1 | +5.0V monitored input | Fixed-threshold input for primary system rail; asserts RESET if voltage drops below 4.25V |
| 2 IN2 | +3.0V monitored input & device power supply | Supplies internal circuitry; also monitored - failure here powers down device but maintains RESET validity down to 1V |
| 3 IN3 | User-adjustable input | Accepts external resistor divider; internal 1.23V comparator reference enables monitoring of arbitrary positive voltages |
| 4 IN4 | -5.0V monitored input | Inverted logic input: RESET asserts when voltage rises above -4.50V - detects negative rail overvoltage or loss of regulation |
| 5 GND | Analog/digital ground reference | Common return path for all comparators and RESET driver; must be low-impedance to avoid noise-induced false resets |
| 6 RESET | Active-low open-drain reset output | Drives low when any input violates threshold; internal 10µA pullup to IN2 eliminates need for external resistor in many 3.0V/3.3V systems |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent voltage monitoring | Simultaneously supervises four distinct supply domains - eliminates need for four discrete supervisors or complex discrete resistor networks |
| Factory-trimmed thresholds with ±5% tolerance | Guarantees precise reset points across temperature without calibration - reduces BOM count and test overhead |
| Open-drain RESET with internal 10µA pullup to IN2 | Enables direct interfacing with 1.8V–5.5V logic families without external pullup; prevents contention during mixed-voltage board bring-up |
| 140ms minimum reset timeout | Ensures CPU and peripheral initialization completes before release - meets JEDEC JESD84-A44B boot timing requirements |
| Immunity to short supply transients | Rejects <100µs glitches on monitored inputs - prevents spurious resets in electrically noisy industrial environments |
Applications
| Industrial PLC Power Management | Networking Switch Supervisor |
|---|---|
Use Scenario: Monitoring +5V I/O bus, +3.0V FPGA core, adjustable auxiliary rail, and -5V RS-232 transceiver supply in programmable logic controllers. IC Role / Device Role / Timing Role: Quad supervisor providing synchronized reset assertion across heterogeneous power domains during cold start or brownout recovery. Use Value: Eliminates discrete RC reset circuits and reduces PCB area by >60% versus four individual supervisors - critical for DIN-rail mounted enclosures. | Use Scenario: Supervising +5V management controller, +3.0V PHY interface, adjustable 1.2V bias rail, and -5V analog front-end in enterprise Ethernet switches. IC Role / Device Role / Timing Role: Single-point reset coordination for multi-rail switch ASICs and companion PMICs, with guaranteed 140ms hold time for SerDes lock. Use Value: Enables deterministic boot sequence across 10GBase-T PHY, MAC, and management MCU - avoids race conditions causing link flapping. |
| High-End Printer Engine Control | Data Storage RAID Controller |
Use Scenario: Monitoring +5V stepper motor drivers, +3.0V print head ASIC, adjustable heater control rail, and -5V sensor bias in laser printer engines. IC Role / Device Role / Timing Role: Fault-tolerant reset generator that remains functional even if IN1 or IN2 drops to 1.0V - sustains supervision during partial power collapse. Use Value: Prevents mechanical damage from uncontrolled motor motion during undervoltage events - improves MTBF by eliminating misaligned paper jams. | Use Scenario: Supervising +5V backplane, +3.0V SAS controller, adjustable 2.5V cache memory rail, and -5V termination supply in enterprise RAID subsystems. IC Role / Device Role / Timing Role: Ensures coordinated reset of disk array firmware, PCIe bridge, and battery-backed cache controller upon AC loss or hot-swap insertion. Use Value: Guarantees atomic write-cache flush before power loss - preserves data integrity during unexpected shutdowns per ANSI T10/SCSI standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6340NUT+T | Same pinout and function, but with +5V/-5%/+3.0V/-10%/adjustable/-5V configuration | Offers tighter -10% tolerance on +3.0V rail - preferred where 3.0V margin is critical | Select MAX6340NUT+T if system requires stricter +3.0V monitoring; otherwise MAX6339NUT+T provides optimal balance of cost and performance |
| TPS3808G33DBVR | Triple monitor (not quad); no negative voltage support; 3.3V fixed threshold only | Lacks -5V monitoring and fourth input - requires supplemental circuitry for full MAX6339NUT+T functionality | Choose TPS3808G33DBVR only for simpler 3-rail systems; MAX6339NUT+T remains necessary for -5V and quad-rail coverage |
Compared with MAX6340NUT+T and TPS3808G33DBVR, the MAX6339NUT+T uniquely combines +5V/-5%, +3.0V/-5%, adjustable, and -5V/+10% thresholds in one SOT23-6 package - delivering complete quad-rail supervision without external components or layout changes.
Availability
MAX6339NUT+T is available at Aetrix Electronics and suitable for industrial PLC power management, networking switch supervisor, and high-end printer engine control requiring stable component supply and long-term production continuity.
Supply support for MAX6339NUT+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) designs precision analog and mixed-signal ICs for industrial, communications, and computing applications - emphasizing reliability, integration, and low-power operation.
The MAX6339NUT+T belongs to Maxim's µP supervisory product line, engineered specifically for multi-rail system integrity in space-constrained, thermally demanding environments like telecom infrastructure and industrial automation.
FAQ
What is the exact voltage threshold configuration for MAX6339NUT+T?
The MAX6339NUT+T is configured for +5.0V at -5% tolerance (4.25V–4.50V), +3.0V at -5% tolerance (2.55V–2.70V), one user-adjustable input (1.20V–1.26V internal reference), and -5.0V at +5% tolerance (-4.75V to -4.50V). This specific combination is encoded in the "N" suffix of the part number per Maxim's Selector Guide.
Does MAX6339NUT+T require external components to operate?
No, the MAX6339NUT+T requires no external components for basic operation. Its four monitoring channels use internal precision resistors and bandgap references. Only the user-adjustable input (IN3) needs an external resistor divider if set to a voltage other than 1.23V - and even then, values up to 100kΩ are supported with <1% error.
How does the RESET output behave when IN2 drops below 1V?
When IN2 falls below 1V, the MAX6339NUT+T ceases normal operation and RESET becomes undefined. However, as long as either IN1 ≥1V or IN2 ≥1V, the RESET output remains valid and correctly asserted or de-asserted - enabling graceful shutdown sequencing in partial-failure scenarios.
Can MAX6339NUT+T monitor voltages higher than 5.5V?
No, the MAX6339NUT+T absolute maximum input voltage is +6V for positive rails (except -5V input, rated -6V to +0.3V). Voltages exceeding 5.5V violate operational specifications. For higher rails, external resistor dividers must scale the input - but the MAX6339NUT+T itself cannot directly supervise >5.5V.
Is MAX6339NUT+T compatible with lead-free PCB assembly processes?
Yes, the MAX6339NUT+T is supplied in lead-free packaging (RoHS-compliant) and rated for standard Pb-free reflow profiles. The "+T" suffix explicitly denotes lead-free tape-and-reel packaging, qualified per JEDEC J-STD-020 moisture sensitivity level 1 and compatible with peak temperatures up to 260°C.
MAX6339NUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 2.78V, 4.63V, Adj, -4.63V
- 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-6
MAX6339NUT+T FAQ
1.How can I place an order for MAX6339NUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6339NUT+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 MAX6339NUT+T reliable?
The price and inventory of MAX6339NUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6339NUT+T is usually 5 days.
3.What payment methods are accepted for MAX6339NUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6339NUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6339NUT+T?
MAX6339NUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6339NUT+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 MAX6339NUT+T?
For technical support, including MAX6339NUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6339NUT+T requirements.
6.How does Aetrix verify that MAX6339NUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6339NUT+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 MAX6339NUT+T meets industry standards.
7.What is the process for return or replacement of MAX6339NUT+T?
All MAX6339NUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6339NUT+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 MAX6339NUT+T part is unused and in its original packaging.
Return procedure for MAX6339NUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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