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Analog Devices Inc./Maxim Integrated MAX6339OUT-T
- Part No.:
- MAX6339OUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6339OUT-T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,820
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Product details
Overview
MAX6339OUT-T from Maxim Integrated is a quad voltage supervisory IC that monitors +5.0V, +3.3V, adjustable, and -5.0V supply rails with ±10% threshold tolerance, delivers 140ms minimum reset timeout, consumes only 55µA quiescent current, and asserts an open-drain active-low RESET output. It is used in telecom and industrial systems to ensure reliable microprocessor reset during multi-rail power faults.
For engineers reviewing the MAX6339OUT-T datasheet, MAX6339OUT-T pinout, MAX6339OUT-T application, or MAX6339OUT-T equivalent, this page provides verified pin functions, factory-trimmed threshold accuracy, SOT23-6 package constraints, immunity to short transients, and real-world alternative part comparisons for multi-supply monitoring designs.
Technical Context
The MAX6339OUT-T integrates four precision comparators with a shared 1.23V bandgap reference and internal resistor-divider networks for fixed thresholds (+5.0V, +3.3V, -5.0V), while IN3 supports user-adjustable monitoring via external resistor divider. Its reset logic uses NOR-gated comparator outputs feeding a timeout timer with guaranteed 140ms hold time.
Power is derived solely from IN2 (here +3.3V), and RESET remains valid down to IN1 ≥ 1V or IN2 ≥ 1V. Threshold hysteresis is 0.3% and temperature coefficient is 60ppm/°C - both measured and specified across -40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Input | Powered from IN2 only; supports VIN2 = 1.0V to 5.5V - enables operation even during partial rail collapse. |
| +5.0V Threshold | 4.50V to 4.75V (-10% tolerance) - matches standard 5V ±5% supply spec with margin for aging and ripple. |
| +3.3V Threshold | 2.85V to 3.00V (-10% tolerance) - ensures reset assertion before 3.3V logic becomes unreliable. |
| -5.0V Threshold | -4.50V to -4.25V (+10% tolerance) - calibrated for negative rail undervoltage detection with polarity inversion. |
| Reset Timeout | 140ms to 280ms min/max - guarantees µP reset duration exceeds typical boot initialization sequences. |
| Quiescent Current | 55µA typical - allows integration into always-on monitoring paths without significant system power penalty. |
| Input Hysteresis | 0.3% of threshold - suppresses chatter during slow-rising/falling supply edges without degrading trip point accuracy. |
Pinout & Package
MAX6339OUT-T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm height), rated for -40°C to +85°C operation, with gull-wing leads and RoHS-compliant lead-free finish (denoted by "+T"; "-T" indicates leaded).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN1 | +5.0V monitored input | Fixed-threshold input; asserts RESET if voltage drops below 4.50V (−10%); requires no external components. |
| 2 - IN2 | Power supply & +3.3V monitor | Primary power source for IC; also serves as second monitored rail; RESET valid as long as IN2 ≥ 1V. |
| 3 - IN3 | User-adjustable monitor input | Accepts external resistor divider; internal threshold = 1.23V; supports custom voltages >1.23V with ≤1% error using ≤100kΩ R2. |
| 4 - IN4 | −5.0V monitored input | Fixed negative-threshold input; asserts RESET when voltage rises above −4.50V (+10%); polarity-inverted logic. |
| 5 - GND | Analog/digital ground reference | Single ground connection; must be low-impedance; bypassing recommended with 0.1µF capacitor to IN2. |
| 6 - RESET | Active-low open-drain output | Drives low when any input violates threshold; internal 10µA pullup to IN2; compatible with 0–5.5V logic interfaces. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Simultaneously supervises four distinct rails (+5V, +3.3V, adjustable, −5V) with no shared accuracy degradation. |
| Factory-trimmed thresholds | ±1% initial accuracy on +5V/+3.3V rails; eliminates need for calibration resistors or trimming in production. |
| Transient-immune detection | Rejects INx glitches <200µs (at 50mV overdrive), preventing spurious resets in noisy power environments. |
| Low-voltage reset validity | RESET state remains defined down to IN1 = 1V or IN2 = 1V - critical for brownout recovery sequencing. |
| No external components required | Full functionality achieved with zero external passives for fixed-threshold configurations - reduces BOM and layout area. |
Applications
| Telecommunications Equipment | Industrial Control Systems |
|---|---|
|
Use Scenario: Monitoring redundant +5V, +3.3V, auxiliary, and −5V supplies in line-card power domains of carrier-grade switches. IC Role / Device Role / Timing Role: Quad supervisory circuit providing synchronized reset assertion across all rails during AC dropout or DC-DC failure. Use Value: Prevents partial initialization and firmware corruption by guaranteeing 140ms minimum reset pulse width after full rail recovery. |
Use Scenario: Ensuring safe startup and fault shutdown in PLC backplanes with mixed-signal I/O modules requiring +5V logic, +3.3V MCU core, analog aux, and legacy −5V DAC references. IC Role / Device Role / Timing Role: Centralized voltage integrity monitor interfacing directly to watchdog timer and FPGA configuration logic. Use Value: Eliminates discrete supervisor ICs per rail, reducing component count by 75% and improving MTBF through integrated hysteresis and glitch rejection. |
| High-End Printers | Data Storage Controllers |
|
Use Scenario: Supervising motor drive (+5V), controller core (+3.3V), sensor interface (adjustable), and legacy scanner bias (−5V) in multifunction printer engines. IC Role / Device Role / Timing Role: Single-chip reset generator coordinating thermal shutdown recovery and firmware reload sequences. Use Value: Enables deterministic power-up ordering without external timing RC networks - critical for stepper motor driver synchronization. |
Use Scenario: Validating power integrity across SAS/SATA controller rails (+5V), PHY core (+3.3V), flash buffer (adjustable), and termination bias (−5V) in enterprise SSD controllers. IC Role / Device Role / Timing Role: Fault-detection front-end feeding reset signal to ARM Cortex-M based management MCU. Use Value: Guarantees NAND flash write-protection activation before VCC drops below data-retention threshold (1.8V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3307-33D | Triple-monitor (not quad); fixed +3.3V, +5V, +3.3V; no negative rail support; 200ms timeout. | Lacks −5V monitoring and adjustable input; suitable only where fourth rail is absent or externally supervised. | Select only if design omits −5V or auxiliary rail - avoids redesign but requires separate −5V detector. |
| ADM1085AKSZ-REEL7 | Dual-monitor (+3.3V, +5V); includes thermal shutdown; 140ms timeout; no adjustable or negative inputs. | Missing two monitoring channels; adds temperature sensing - useful only if thermal margining is prioritized over rail count. | Choose when thermal protection outweighs quad voltage coverage; not drop-in for MAX6339OUT-T's 4-rail function. |
Compared with TPS3307-33D and ADM1085AKSZ-REEL7, MAX6339OUT-T uniquely delivers four independent thresholds including −5V and one adjustable channel in SOT23-6 - enabling full-system supervision without supplemental ICs or layout changes.
Availability
MAX6339OUT-T is available at Aetrix Electronics and suitable for telecommunications equipment, industrial control systems, and high-end printers requiring stable component supply with guaranteed long-term manufacturability and extended temperature support.
Supply support for MAX6339OUT-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 power, sensing, and interface applications, with emphasis on reliability and integration for demanding industrial and communications systems.
The MAX6339OUT-T belongs to Maxim's µP supervisory product line, engineered specifically for compact, low-power monitoring of multiple supply rails in space-constrained, mission-critical embedded systems.
FAQ
What is the exact function of the IN3 pin on the MAX6339OUT-T?
The IN3 pin on the MAX6339OUT-T is a user-adjustable voltage monitor input with a fixed internal threshold of 1.23V. It accepts an external resistor-divider network to scale higher voltages (e.g., 12V, 24V) down to 1.23V for accurate undervoltage detection. The MAX6339OUT-T datasheet specifies R2 ≤ 100kΩ for ≤1% error, and the device guarantees ±0.1µA input current on this pin.
Can the MAX6339OUT-T monitor a −12V supply?
Yes - the MAX6339OUT-T can monitor −12V using the IN4 pin with an external resistor-divider, as described in Figure 5 of the MAX6339OUT-T datasheet. For −12V nominal with −11.1V threshold, R1 = 3.48kΩ and R2 = 2.49kΩ yield <1% error. The MAX6339OUT-T's −5V input stage is designed for such extensions, provided external current exceeds 2mA to dominate input leakage.
Does the MAX6339OUT-T require external pull-up on the RESET pin?
No - the MAX6339OUT-T includes a weak internal 10µA pull-up to IN2, sufficient for most 3.3V or 5V logic interfaces. An external pull-up is only needed when interfacing to logic supplies outside IN2's range (e.g., 1.8V or 2.5V), and must be sized to overdrive the internal pull-up without exceeding 20mA absolute maximum sink current. The MAX6339OUT-T specification confirms RESET remains valid down to IN2 = 1V.
What is the minimum operating voltage for the MAX6339OUT-T to assert a valid RESET?
The MAX6339OUT-T guarantees valid RESET output state as long as either IN1 ≥ 1V or IN2 ≥ 1V - per Note 3 in the MAX6339OUT-T electrical characteristics table. This allows controlled reset assertion during deep brownout conditions where only one rail remains marginally active, ensuring deterministic behavior beyond standard supply ranges.
How does the MAX6339OUT-T handle short-duration supply transients?
The MAX6339OUT-T rejects transients under 200µs duration when the monitored voltage deviates by ≥50mV from its threshold - confirmed by the MAX6339OUT-T Typical Operating Characteristics graph "Maximum IN_ Transient Duration vs. Reset Threshold Overdrive". This built-in noise immunity prevents false resets caused by switching noise or load-step artifacts without requiring external RC filtering.
MAX6339OUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 2.93V, 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
MAX6339OUT-T FAQ
1.How can I place an order for MAX6339OUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6339OUT-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 MAX6339OUT-T reliable?
The price and inventory of MAX6339OUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6339OUT-T is usually 5 days.
3.What payment methods are accepted for MAX6339OUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6339OUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6339OUT-T?
MAX6339OUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6339OUT-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 MAX6339OUT-T?
For technical support, including MAX6339OUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6339OUT-T requirements.
6.How does Aetrix verify that MAX6339OUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6339OUT-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 MAX6339OUT-T meets industry standards.
7.What is the process for return or replacement of MAX6339OUT-T?
All MAX6339OUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6339OUT-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 MAX6339OUT-T part is unused and in its original packaging.
Return procedure for MAX6339OUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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