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Analog Devices Inc./Maxim Integrated MAX6339MUT+
- Part No.:
- MAX6339MUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6339MUT+.pdf
- Description:
- IC SUPERVISOR MPU QUAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,456
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Product details
Overview
MAX6339MUT+ from Maxim Integrated is a precision quad voltage supervisory IC that monitors +5.0V, +3.0V, user-adjustable, and -5.0V supply rails with ±10% threshold tolerance. It delivers a single active-low open-drain RESET output with 140ms minimum timeout, operates from IN2 supply (1.0V to 5.5V), and draws only 55µA typical supply current. It is used in industrial equipment and networking gear to ensure reliable power-on reset sequencing and undervoltage detection.
For engineers reviewing the MAX6339MUT+ datasheet, MAX6339MUT+ pinout, MAX6339MUT+ application, or MAX6339MUT+ equivalent, key selection criteria include its factory-configured four-rail monitoring architecture, guaranteed operation from –40°C to +85°C, immunity to short supply transients, and SOT23-6 package compatibility with space-constrained embedded control designs.
Technical Context
The MAX6339MUT+ integrates an accurate bandgap reference, four precision comparators, and internal trimmed resistor-divider networks for fixed thresholds (+5.0V, +3.0V, –5.0V), while one input (IN3) supports user-adjustable monitoring via external resistor divider referenced to 1.23V. Its comparator hysteresis is 0.3% of threshold voltage, enhancing noise immunity without compromising accuracy.
RESET assertion is triggered when any monitored input falls below its threshold (or rises above for –5V), and the output remains low for ≥140ms after all inputs recover. The open-drain RESET has a 10µA internal pullup to IN2 and remains valid as long as IN1 ≥1V or IN2 ≥1V - enabling robust reset signaling even during partial supply collapse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| +5.0V Threshold | 4.50V to 4.75V (–10% to –5% tolerance); ensures reliable reset during 5V rail sag |
| +3.0V Threshold | 2.55V to 2.85V (–10% to –5% tolerance); matches standard 3.0V logic supply margin |
| –5.0V Threshold | –4.50V to –4.75V (+10% to +5% tolerance); detects overvoltage on negative rail |
| Adjustable Threshold | 1.20V to 1.26V (±0.03V); serves as reference for external resistor-divider scaling |
| Reset Timeout | 140ms to 280ms; guarantees sufficient hold time for microprocessor initialization |
| Supply Current | 55µA typical at VIN2 = 3.0V; enables ultra-low-power system supervision |
| Operating Temp | –40°C to +85°C; qualified for industrial-grade embedded applications |
Pinout & Package
MAX6339MUT+ 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; asserts RESET if voltage drops below 4.50–4.75V |
| 2 - IN2 | Power supply & +3.0V monitor | Device power source; also monitors +3.0V rail (2.55–2.85V threshold) |
| 3 - IN3 | User-adjustable monitor input | Accepts external resistor-divider; references 1.23V internal threshold |
| 4 - IN4 | –5.0V monitored input | Fixed-threshold negative rail monitor; triggers RESET if voltage rises above –4.50V to –4.75V |
| 5 - GND | Analog/digital ground reference | Common return path for all comparators and internal circuitry |
| 6 - RESET | Active-low open-drain output | Pulled up internally to IN2 (10µA); requires no external pullup for 3.0V/3.3V logic interfacing |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent voltage monitoring | Simultaneously supervises +5V, +3V, adjustable, and –5V rails - eliminates need for four discrete supervisors |
| Factory-trimmed precision thresholds | ±1% initial accuracy over temperature; 60ppm/°C tempco ensures stable trip points across –40°C to +85°C |
| Transient-immune reset logic | Rejects INx glitches ≤100µs (at 50mV overdrive); prevents false resets in noisy industrial environments |
| Low-voltage reset validity | RESET remains functional down to IN1 = 1V or IN2 = 1V - supports brownout recovery in multi-rail systems |
| No external components required | Full quad supervision achieved with zero external resistors/capacitors for standard configurations |
Applications
| Industrial PLC Controllers | Network Switch Power Management |
|---|---|
Use Scenario: Monitoring redundant 5V, 3V, and auxiliary rails in programmable logic controller backplanes subject to EMI and thermal cycling. IC Role / Device Role / Timing Role: Quad voltage supervisor ensuring synchronized reset assertion across CPU, FPGA, and I/O power domains. Use Value: Prevents lockup during partial rail failure by asserting RESET if any monitored supply deviates beyond ±10%, with 140ms timeout guaranteeing full firmware reload. | Use Scenario: Supervising primary +5V, backup +3.0V, adjustable bias rail, and –5V analog supply in managed Ethernet switches. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete reset ICs to reduce BOM count and board area in 1RU switch designs. Use Value: Enables fail-safe reboot when –5V analog supply drifts positive (e.g., due to load transient), using polarity-aware comparator logic. |
| Telecom Line Card Supervision | High-End Printer Engine Control |
Use Scenario: Validating multiple DC/DC outputs (+5V core, +3.0V interface, –5V op-amp bias, adjustable sensor rail) on telecom line cards operating in NEBS-compliant enclosures. IC Role / Device Role / Timing Role: Voltage integrity guardian with guaranteed –40°C to +85°C operation and <55µA quiescent current. Use Value: Maintains system-level reset integrity despite wide ambient swings and supply ripple, leveraging built-in 0.3% hysteresis to reject noise. | Use Scenario: Coordinating power-up sequencing for motor drivers, ASICs, and imaging sensors in laser printer engines where rail timing margins are tight. IC Role / Device Role / Timing Role: Centralized reset generator activated only after all four critical supplies stabilize within tolerance. Use Value: Eliminates risk of ASIC latch-up or motor driver misfire by enforcing 140ms minimum reset hold time post-stabilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6340MUT+ | Same pinout and function; differs only in reset timeout (200ms min vs. 140ms min) | Suitable where longer reset hold time is required for slower microprocessors | Select MAX6340MUT+ if design requires >140ms guaranteed reset assertion |
| TPS3307-33DGNR | Triple-supply monitor (not quad); includes watchdog timer; different pinout (8-pin MSOP) | Lacks –5V monitoring capability and user-adjustable input; adds watchdog functionality | Choose TPS3307-33DGNR only if watchdog timer is needed and –5V supervision is omitted |
Compared with MAX6339MUT+, MAX6340MUT+ extends reset timeout for legacy µP compatibility, while TPS3307-33DGNR trades quad monitoring for watchdog capability and triple-rail coverage - neither offers drop-in replacement due to functional and pinout differences.
Availability
MAX6339MUT+ is available at Aetrix Electronics and suitable for industrial PLC controllers, network switch power management, and telecom line card supervision requiring stable component supply, extended temperature support, and compact SOT23 packaging.
Supply support for MAX6339MUT+ 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 power management ICs for industrial, communications, and computing applications.
The MAX6339 belongs to Maxim's µP supervisory product line, engineered specifically for multi-rail system integrity in space- and power-constrained embedded platforms where reliability across temperature extremes is critical.
FAQ
What is the exact reset timeout duration for MAX6339MUT+?
The MAX6339MUT+ guarantees a minimum reset timeout period of 140ms after all monitored voltages exceed their thresholds. Typical timeout is 200ms, and maximum is 280ms over the full –40°C to +85°C operating range. This timing is internally generated and does not require external capacitors or resistors.
Can MAX6339MUT+ monitor a +12V supply?
No, MAX6339MUT+ cannot directly monitor +12V. Its absolute maximum input voltage is +6V for positive rails. To supervise +12V, an external resistor-divider must be used to scale the voltage down to within the device's input range (e.g., to ≤5.5V), referencing the adjustable 1.23V threshold on IN3. The MAX6339MUT+ datasheet provides design equations for such scaling.
Does MAX6339MUT+ support monitoring two negative supplies?
No. MAX6339MUT+ supports only one negative supply monitor: IN4 is factory-configured for –5.0V with +5% or +10% tolerance. IN1, IN2, and IN3 are designed for positive rails only. To monitor additional negative rails, external signal conditioning (e.g., level-shifting amplifiers) would be required - the MAX6339MUT+ itself does not provide dual negative monitoring capability.
What is the role of IN2 in MAX6339MUT+ operation?
IN2 serves a dual role in MAX6339MUT+: it powers the IC and simultaneously functions as the +3.0V monitored supply. The device draws current from IN2 (1.0V to 5.5V), and its internal circuitry validates RESET as long as IN2 ≥1V. This integrated power-and-monitor architecture reduces external component count and simplifies supply sequencing in the MAX6339MUT+ design.
Is MAX6339MUT+ RoHS-compliant and lead-free?
Yes, MAX6339MUT+ is lead-free and RoHS-compliant. The "+" suffix in the part number explicitly denotes lead-free packaging per Maxim/Analog Devices' standard. It is supplied in tape-and-reel format and meets JEDEC J-STD-020 moisture sensitivity level 1 requirements for reflow soldering.
MAX6339MUT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 2.63V, 4.38V, Adj, -4.38V
- 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
MAX6339MUT+ FAQ
1.How can I place an order for MAX6339MUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6339MUT+ 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 MAX6339MUT+ reliable?
The price and inventory of MAX6339MUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6339MUT+ is usually 5 days.
3.What payment methods are accepted for MAX6339MUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6339MUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6339MUT+?
MAX6339MUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6339MUT+ 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 MAX6339MUT+?
For technical support, including MAX6339MUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6339MUT+ requirements.
6.How does Aetrix verify that MAX6339MUT+ is sourced from the original manufacturer or authorized distributors?
All MAX6339MUT+ 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 MAX6339MUT+ meets industry standards.
7.What is the process for return or replacement of MAX6339MUT+?
All MAX6339MUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6339MUT+, 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 MAX6339MUT+ part is unused and in its original packaging.
Return procedure for MAX6339MUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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