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Analog Devices Inc./Maxim Integrated MAX6339JUT
- Part No.:
- MAX6339JUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6339JUT.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,008
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Product details
Overview
The MAX6339JUT from Maxim Integrated is a quad voltage supervisory IC that monitors +5.0V (−5%), +3.3V (−5%), +2.5V (−5%), and +1.8V (−5%) supply rails in multi-rail systems, asserting a single active-low open-drain RESET output when any falls below its threshold. It operates from IN2, draws only 55µA, features 140ms min reset timeout, and requires no external components for factory-trimmed thresholds.
For engineers reviewing the MAX6339JUT datasheet, MAX6339JUT pinout, MAX6339JUT application, or MAX6339JUT equivalent, key selection criteria include verified −5% threshold accuracy per rail, guaranteed operation down to IN1/IN2 = 1V, immunity to short transients (<1µs at 50mV overdrive), SOT23-6 footprint compatibility, and support for mixed-voltage system reset coordination without external resistors.
Technical Context
The MAX6339JUT integrates four precision comparators with a shared 1.23V bandgap reference and internal resistor-divider networks calibrated for exact −5% tolerance on all four monitored rails: IN1 = +5.0V, IN2 = +3.3V, IN3 = +2.5V, IN4 = +1.8V. Each comparator includes 0.3% hysteresis to reject noise while preserving threshold accuracy.
Power is derived solely from IN2; RESET remains valid as long as IN1 ≥ 1V or IN2 ≥ 1V. The open-drain RESET output includes a 10µA internal pullup to IN2, eliminating need for external pullup in same-supply logic interfaces, and supports overdrive to 0–5.5V logic levels with reverse-current protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| +5.0V Threshold | 4.25V to 4.50V (−5% tolerance, factory-trimmed) |
| +3.3V Threshold | 2.85V to 3.00V (−5% tolerance, factory-trimmed) |
| +2.5V Threshold | 2.13V to 2.25V (−5% tolerance, factory-trimmed) |
| +1.8V Threshold | 1.53V to 1.62V (−5% tolerance, factory-trimmed) |
| Reset Timeout | 140ms minimum (ensures reliable µP reset hold time) |
| Supply Current | 55µA typical (enables low-power always-on supervision) |
| Operating Temp | −40°C to +85°C (supports industrial-grade system deployment) |
| RESET Valid Range | IN1 ≥ 1V or IN2 ≥ 1V (guarantees reset assertion during brownout) |
Pinout & Package
The MAX6339JUT is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN1 | Monitored input 1 | +5.0V (−5%) rail monitoring; threshold fixed at 4.25–4.50V |
| 2 - IN2 | Power supply & monitored input 2 | Device power source and +3.3V (−5%) rail monitor (2.85–3.00V) |
| 3 - IN3 | Monitored input 3 | +2.5V (−5%) rail monitoring; threshold fixed at 2.13–2.25V |
| 4 - IN4 | Monitored input 4 | +1.8V (−5%) rail monitoring; threshold fixed at 1.53–1.62V |
| 5 - GND | Analog/digital ground | Common reference for all comparators and RESET output |
| 6 - RESET | Active-low open-drain output | Asserted low if any INx drops below threshold; pulled up weakly (10µA) to IN2 |
Key Features
| Feature | Design Value |
|---|---|
| Quad rail monitoring | Simultaneous supervision of +5V, +3.3V, +2.5V, and +1.8V rails with −5% tolerance-no external resistors required |
| Low-power operation | 55µA supply current enables integration into battery-backed or energy-sensitive systems without measurable load impact |
| Robust reset timing | Guaranteed 140ms minimum reset timeout ensures full µP initialization before release, even after rapid supply recovery |
| Brownout resilience | RESET remains asserted and valid down to IN1 = 1V or IN2 = 1V-critical for graceful shutdown during deep undervoltage events |
| Noise-immune design | 0.3% comparator hysteresis + transient rejection (<1µs at 50mV overdrive) prevents false resets in electrically noisy environments |
Applications
| Telecommunications Equipment | Industrial Control Systems |
|---|---|
Use Scenario: Monitoring multiple DC rails (+5V, +3.3V, +2.5V, +1.8V) powering FPGA, DSP, and PHY ICs in base station line cards. IC Role / Device Role / Timing Role: Quad voltage supervisor ensuring coordinated reset across heterogeneous logic domains during AC dropout or hot-swap events. Use Value: Eliminates discrete supervisor ICs and reduces BOM count by 75%, while guaranteeing simultaneous reset assertion across all rails within 20µs delay match. | Use Scenario: Supervising power supplies for PLC CPU modules operating in harsh factory environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: System-level reset coordinator that holds µP in reset until all critical rails stabilize post-power-up or brownout recovery. Use Value: 140ms timeout and 1V validity floor prevent premature firmware execution during marginal supply conditions, improving field reliability. |
| Network Attached Storage (NAS) | High-End Printers |
Use Scenario: Ensuring clean boot sequencing for dual-core ARM SoC, DDR3 memory, and SATA controller powered by independent +5V, +3.3V, +2.5V, and +1.8V regulators. IC Role / Device Role / Timing Role: Single-point reset generator triggered by any rail fault, synchronizing reset across memory, processor, and peripheral subsystems. Use Value: Factory-trimmed −5% thresholds match tight regulator tolerances, avoiding unnecessary margin-induced false resets during thermal drift. | Use Scenario: Managing power integrity for ASIC-based print engine controllers requiring stable +5V logic, +3.3V interface, +2.5V sensor bias, and +1.8V core rails. IC Role / Device Role / Timing Role: Fault-detection hub that asserts global reset on first rail failure, preventing corrupted print jobs or motor missteps. Use Value: Open-drain RESET with IN2-referenced 10µA pullup simplifies interface to diverse logic families without level-shifting components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6340JUT | Same pinout and −5% thresholds, but adds watchdog timer with 1.6s timeout and manual reset input | Required where µP hang detection or operator-initiated reset is needed beyond basic voltage monitoring | Select MAX6340JUT only if watchdog functionality is explicitly required; otherwise MAX6339JUT offers lower cost and simpler layout |
| TPS3307-33D | Triple voltage monitor (not quad); thresholds fixed at +3.3V/−5%, +3.3V/−10%, +3.3V/−10%; no +5V/+2.5V/+1.8V support | Suitable only for systems with three identical or near-identical rails-cannot replace full quad-rail coverage of MAX6339JUT | Use TPS3307-33D only when monitoring three +3.3V rails; MAX6339JUT remains necessary for mixed-voltage systems |
Compared with MAX6340JUT and TPS3307-33D, the MAX6339JUT delivers precise −5% quad-rail supervision in minimal SOT23-6 area with zero external components-making it optimal for space-constrained, cost-sensitive, mixed-supply applications where watchdog or triple-rail-only capability is unnecessary.
Availability
MAX6339JUT is available at Aetrix Electronics and suitable for telecommunications equipment, industrial control systems, and network-attached storage requiring stable component supply with guaranteed −5% threshold accuracy and extended temperature operation.
Supply support for MAX6339JUT 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 high-reliability industrial, communications, and computing applications.
The MAX6339JUT belongs to Maxim's µP supervisory product line, engineered specifically for compact, low-power, multi-rail voltage monitoring in systems where board space, BOM count, and supply-margin fidelity are critical constraints.
FAQ
What voltage rails does the MAX6339JUT monitor and what are their exact thresholds?
The MAX6339JUT monitors IN1 = +5.0V (−5% = 4.25V–4.50V), IN2 = +3.3V (−5% = 2.85V–3.00V), IN3 = +2.5V (−5% = 2.13V–2.25V), and IN4 = +1.8V (−5% = 1.53V–1.62V). All thresholds are factory-trimmed and specified across −40°C to +85°C. These values are confirmed in the Selector Guide and Electrical Characteristics table of the MAX6339JUT datasheet.
Does the MAX6339JUT require external components to function with its default thresholds?
No, the MAX6339JUT requires zero external components when used with its factory-trimmed thresholds. Its internal resistor-divider networks and precision bandgap reference enable direct connection of +5V, +3.3V, +2.5V, and +1.8V rails to IN1–IN4. External resistors are needed only for user-adjustable configurations-not applicable to the MAX6339JUT variant.
How does the RESET output behave during partial supply failure?
When any monitored rail drops below its threshold, the MAX6339JUT asserts RESET low immediately. RESET remains low for ≥140ms after all rails recover above threshold-and stays valid as long as IN1 ≥ 1V or IN2 ≥ 1V. This ensures robust reset hold during brownout recovery, a behavior verified in the MAX6339JUT timing diagrams and Absolute Maximum Ratings section.
What is the power source for the MAX6339JUT and how does it affect operation?
The MAX6339JUT is powered exclusively from the IN2 pin, which also serves as the +3.3V (−5%) monitored rail. This architecture eliminates need for a separate VCC supply. Operation is guaranteed as long as IN2 ≥ 1V, and RESET validity is maintained even if other inputs fall to 0V-confirmed in Note 3 of the MAX6339JUT Electrical Characteristics table.
Is the MAX6339JUT pin-compatible with other variants in the MAX6339 family?
Yes, all MAX6339 variants-including MAX6339JUT-share identical 6-pin SOT23-6 pinout and footprint. Pin functions (IN1, IN2, IN3, IN4, GND, RESET) are fixed across the family. However, threshold configurations differ by suffix (e.g., JUT vs. AUT), so electrical behavior is not interchangeable without verifying the Selector Guide mapping for each specific part number.
MAX6339JUT 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:
- 1.8V, 2.5V, 3.3V, 5V
- 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
MAX6339JUT FAQ
1.How can I place an order for MAX6339JUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6339JUT 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 MAX6339JUT reliable?
The price and inventory of MAX6339JUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6339JUT is usually 5 days.
3.What payment methods are accepted for MAX6339JUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6339JUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6339JUT?
MAX6339JUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6339JUT 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 MAX6339JUT?
For technical support, including MAX6339JUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6339JUT requirements.
6.How does Aetrix verify that MAX6339JUT is sourced from the original manufacturer or authorized distributors?
All MAX6339JUT 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 MAX6339JUT meets industry standards.
7.What is the process for return or replacement of MAX6339JUT?
All MAX6339JUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6339JUT, 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 MAX6339JUT part is unused and in its original packaging.
Return procedure for MAX6339JUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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