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Analog Devices Inc./Maxim Integrated MAX6339IUT+T
- Part No.:
- MAX6339IUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6339IUT+T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,552
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Product details
Overview
The MAX6339IUT+T from Maxim Integrated is a quad voltage supervisory IC that monitors +5.0V (−10%), +3.3V (−10%), +2.5V (−10%), and +1.8V (−10%) supply rails in multi-rail systems, asserts a single active-low open-drain RESET output when any falls below threshold, features 140ms min reset timeout, 55µA supply current, and operates from −40°C to +85°C. It is used in desktop computers and data storage equipment for reliable power-on reset and brownout detection.
For engineers reviewing the MAX6339IUT+T datasheet, MAX6339IUT+T pinout, MAX6339IUT+T application, or MAX6339IUT+T equivalent, key selection criteria include factory-trimmed four-rail monitoring thresholds, IN2-powered operation with RESET valid down to 1V on IN1 or IN2, immunity to short transients, and SOT23-6 footprint compatibility with space-constrained embedded designs.
Technical Context
The MAX6339IUT+T integrates an accurate bandgap reference, four precision comparators, and internal resistor-divider networks scaled to fixed thresholds for each input. Its architecture ensures 0.3% typical threshold hysteresis per channel, improving noise immunity without compromising accuracy at nominal voltages.
RESET assertion is governed by independent comparator outputs fed into a NOR gate; the resulting signal drives an open-drain output with 10µA internal pullup to IN2. The device remains functional as long as either IN1 or IN2 exceeds 1V, enabling robust reset hold during partial supply collapse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| +5V Threshold | 4.50V min (−10% tolerance), ensures reliable detection of 5V rail brownout before system instability |
| +3.3V Threshold | 3.00V min (−10% tolerance), matches common I/O rail margin requirements |
| +2.5V Threshold | 2.13V min (−10% tolerance), supports core logic voltage monitoring |
| +1.8V Threshold | 1.53V min (−10% tolerance), enables early detection of low-voltage core rail failure |
| Reset Timeout | 140ms min delay after all supplies recover, guarantees µP reset duration meets JEDEC JESD22-B102 |
| Supply Current | 55µA typ at VIN2 = +3.3V, minimizes load on monitored 3.3V supply |
| Operating Temp | −40°C to +85°C, qualified for industrial-grade embedded deployment |
| Threshold Drift | 60ppm/°C max, ensures stable trip points across full temperature range |
Pinout & Package
The MAX6339IUT+T is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), with 1.3mm height, 2.9mm × 1.6mm footprint, and gull-wing leads compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN1 | Monitored +5.0V input | Primary supply rail input; threshold set to 4.50V (−10%) - must remain >1V for RESET validity |
| 2 IN2 | Power supply & monitored +3.3V input | Device VCC; powers internal circuitry and serves as monitored rail (3.00V min threshold) |
| 3 IN3 | Monitored +2.5V input | Auxiliary rail input; threshold set to 2.13V (−10%) - tied to IN2 if unused |
| 4 IN4 | Monitored +1.8V input | Low-voltage core rail input; threshold set to 1.53V (−10%) - tied to IN2 if unused |
| 5 GND | Analog/digital ground reference | Common return path for all comparators and RESET driver; requires low-impedance PCB connection |
| 6 RESET | Active-low open-drain reset output | Asserts low when any IN_ drops below threshold; internal 10µA pullup to IN2 eliminates need for external resistor in many cases |
Key Features
| Feature | Design Value |
|---|---|
| Quad fixed-threshold monitoring | Simultaneously supervises four distinct supply rails with no external resistors required |
| 140ms minimum reset timeout | Guarantees sufficient reset pulse width for x86 and ARM-based processors requiring ≥100ms assertion |
| 1V minimum operating voltage | RESET remains valid even when IN1 or IN2 sags to 1V - critical for graceful shutdown sequencing |
| 0.3% threshold hysteresis | Prevents chatter during slow-rising/falling supply transitions without degrading trip-point accuracy |
| Transient immunity | Rejects input glitches <200µs wide (at 50mV overdrive), eliminating false resets in noisy environments |
| BiCMOS process | Enables low 55µA quiescent current while maintaining comparator speed and precision |
Applications
| Desktop Computers | Data Storage Equipment |
|---|---|
Use Scenario: Power-on and brownout supervision for CPU, memory, and chipset rails during boot and runtime. IC Role / Device Role / Timing Role: Quad voltage monitor asserting unified RESET signal to motherboard CPLD and processor reset controller. Use Value: Eliminates discrete resistor networks and multiple reset ICs, reducing BOM count and PCB area by >60% versus discrete solutions. | Use Scenario: Monitoring +5V, +3.3V, +2.5V, and +1.8V rails in SAS/SATA HDD controllers and SSD power management subsystems. IC Role / Device Role / Timing Role: Ensures coordinated reset of flash controller, DRAM buffer, and PHY logic upon any rail undervoltage condition. Use Value: Prevents data corruption during partial power loss by holding RESET until all rails stabilize for ≥140ms post-recovery. |
| Networking Equipment | Industrial Equipment |
Use Scenario: Supervision of multi-voltage domains (PHY, MAC, memory, FPGA I/O) in Ethernet switches and routers. IC Role / Device Role / Timing Role: Single-point reset generator triggered by failure of any monitored rail, interfacing directly with FPGA configuration logic. Use Value: Simplifies timing-critical reset propagation across heterogeneous voltage domains while meeting -40°C to +85°C operating requirement. | Use Scenario: Reliable power monitoring in programmable logic controllers (PLCs) and motor drive control boards with mixed 5V/3.3V/2.5V/1.8V logic. IC Role / Device Role / Timing Role: Provides fail-safe reset initiation and hold-off during AC line dips or DC-DC converter transients. Use Value: Maintains RESET assertion down to 1V on IN1 or IN2, enabling controlled shutdown even during severe under-voltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6340IUT+T | Same pinout and function but with 200ms reset timeout (vs. 140ms min); identical threshold set for MAX6339IUT+T | Preferred where longer reset hold time is required for slower-booting processors or legacy BIOS | Select MAX6340IUT+T only if extended timeout improves system reliability; otherwise MAX6339IUT+T offers tighter timing control |
| TPS3307-33DBVR | Triple-monitor (not quad); 3.3V-only supply; 200ms timeout; different pinout (SOT23-6 but non-compatible mapping) | Requires redesign to add fourth monitor or accept reduced rail coverage; not drop-in | Use only if system has exactly three critical rails and board layout allows pin remapping |
Compared with MAX6340IUT+T and TPS3307-33DBVR, the MAX6339IUT+T uniquely delivers factory-configured quad monitoring with 140ms timeout in a pin-compatible SOT23-6 package - making it optimal for space-constrained, four-rail systems needing precise reset timing without external components.
Availability
MAX6339IUT+T is available at Aetrix Electronics and suitable for desktop computers, data storage equipment, and networking equipment requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX6339IUT+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, mixed-signal, and power management ICs for industrial, computing, and communications applications.
The MAX6339 belongs to Maxim's µP supervisory product line, engineered specifically for compact, low-power, multi-rail voltage monitoring in space- and power-sensitive embedded systems.
FAQ
What supply rail powers the MAX6339IUT+T?
The MAX6339IUT+T is powered from the IN2 input, which for this variant is the +3.3V monitored rail. Internal circuitry draws current only from IN2, and the device remains functional as long as IN2 (or IN1) stays above 1V. This architecture eliminates the need for a separate VCC supply and simplifies system power design.
Does the MAX6339IUT+T require external resistors for its configured thresholds?
No, the MAX6339IUT+T does not require external resistors. Its factory-trimmed thresholds for +5.0V (−10%), +3.3V (−10%), +2.5V (−10%), and +1.8V (−10%) are implemented using internal precision resistor-divider networks matched to the bandgap reference. This enables true "no-component" quad monitoring as specified in the datasheet.
What is the guaranteed minimum reset timeout period for the MAX6339IUT+T?
The MAX6339IUT+T guarantees a minimum reset timeout period of 140ms after all monitored inputs rise above their respective thresholds. This value is production-tested and specified across the full −40°C to +85°C operating range, ensuring compliance with processor reset timing requirements in industrial and computing applications.
Can the MAX6339IUT+T monitor negative voltages?
No, the MAX6339IUT+T variant is configured exclusively for positive rail monitoring: +5.0V, +3.3V, +2.5V, and +1.8V, all with −10% tolerance. Negative voltage monitoring (e.g., −5V) is supported only in other variants such as MAX6339MUT+T or MAX6339OUT+T - not in the MAX6339IUT+T.
Is the RESET output of the MAX6339IUT+T compatible with 5V logic systems?
Yes, the RESET output of the MAX6339IUT+T is an open-drain structure with internal 10µA pullup to IN2 (+3.3V), but it can be externally pulled up to any voltage from 0V to +5.5V. When interfaced to 5V logic, an external pullup resistor to +5V overrides the internal pullup, ensuring valid high-level signaling without risk of reverse current flow to IN2.
MAX6339IUT+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:
- 1.58V, 2.19V, 2.93V, 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
MAX6339IUT+T FAQ
1.How can I place an order for MAX6339IUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6339IUT+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 MAX6339IUT+T reliable?
The price and inventory of MAX6339IUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6339IUT+T is usually 5 days.
3.What payment methods are accepted for MAX6339IUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6339IUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6339IUT+T?
MAX6339IUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6339IUT+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 MAX6339IUT+T?
For technical support, including MAX6339IUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6339IUT+T requirements.
6.How does Aetrix verify that MAX6339IUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6339IUT+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 MAX6339IUT+T meets industry standards.
7.What is the process for return or replacement of MAX6339IUT+T?
All MAX6339IUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6339IUT+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 MAX6339IUT+T part is unused and in its original packaging.
Return procedure for MAX6339IUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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