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Analog Devices Inc./Maxim Integrated MAX6338KUB+T
- Part No.:
- MAX6338KUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6338KUB+T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,752
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Product details
Overview
MAX6338KUB+T from Maxim Integrated is a quad voltage monitor IC designed for multivoltage system supervision, featuring factory-programmed thresholds of adjustable/Adj*, +3.3V, +2.5V, and adjustable/Adj* with 10% supply tolerance, 25µA typical supply current, ±60ppm/°C threshold temperature coefficient, and open-drain active-low outputs - used in telecom power sequencing and industrial embedded control.
For engineers reviewing the MAX6338KUB+T datasheet, MAX6338KUB+T pinout, MAX6338KUB+T application, or MAX6338KUB+T equivalent, this page delivers verified electrical parameters, µMAX package layout, real-world use cases in power-good signaling and multirail monitoring, and validated alternative options for voltage supervisor selection.
Technical Context
The MAX6338KUB+T integrates four independent comparators, each with an internal 1.23V bandgap reference and precision resistor-divider networks to set nominal thresholds; IN1 and IN4 are auxiliary inputs supporting user-adjustable trip points via external resistor dividers (VTH = 1.23V × (1 + R1/R2)).
All outputs are open-drain with 10µA internal pull-ups to VCC, enabling wire-OR configuration for consolidated power-good signaling; undervoltage lockout forces all outputs low when VCC drops below +2.5V, ensuring reliable reset behavior across -40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - supports direct connection to monitored rails including +3.3V and +2.5V supplies |
| Supply Current (typ) | 25µA at +5V - enables always-on supervision in battery-backed or low-power systems |
| Threshold Accuracy | ±1.5% over temperature - ensures reliable detection without calibration across industrial range |
| Threshold Tempco | 60ppm/°C - limits drift to <±0.5% over full -40°C to +85°C range |
| Propagation Delay | 20µs max - provides fast response to supply faults for timely system reset |
| Output Type | Four independent open-drain, active-low outputs - allows flexible logic interfacing and wire-OR'ing |
| Hysteresis | 0.3% - eliminates noise-induced false triggering without external components |
Pinout & Package
The MAX6338KUB+T is housed in a 10-pin µMAX® package (3.0mm × 3.0mm, 0.6mm pitch), thermally enhanced with exposed pad for improved power dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1) | Auxiliary input | User-adjustable threshold via external resistor divider; referenced to 1.23V internal bandgap |
| 2 (IN2) | +3.3V monitor input | Factory-trimmed for 3.3V ±10%; no external components required |
| 3 (IN3) | +2.5V monitor input | Factory-trimmed for 2.5V ±10%; optimized for DDR memory or core logic rails |
| 4 (IN4) | Auxiliary input | Second user-adjustable threshold; supports dual adjustable rail monitoring |
| 5 (GND) | Analog/digital ground | Common reference for all comparators and outputs; requires low-impedance PCB connection |
| 6 (OUT4) | Active-low output | Open-drain signal asserting when IN4 falls below its threshold; pulls low on fault |
| 7 (OUT3) | Active-low output | Corresponds to IN3 (+2.5V); enables discrete rail fault indication or OR'ed "power good" |
| 8 (OUT2) | Active-low output | Corresponds to IN2 (+3.3V); compatible with 3.3V logic families and microcontroller reset inputs |
| 9 (OUT1) | Active-low output | Corresponds to IN1 (adjustable); supports custom voltage detection without redesign |
| 10 (VCC) | Power supply input | +2.5V to +5.5V supply; includes undervoltage lockout that holds all outputs low below 2.5V |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Simultaneous supervision of two fixed rails (+3.3V, +2.5V) and two user-adjustable rails - eliminates need for multiple discrete supervisors |
| No external components required | Factory-trimmed thresholds and internal 1.23V reference remove resistors, capacitors, and trimming - reduces BOM count and board space |
| Low quiescent current | 25µA typical ICC enables integration into always-on subsystems without compromising battery life or thermal budget |
| Industrial temperature range | Guaranteed operation from -40°C to +85°C - suitable for telecom line cards, industrial PLCs, and network switches |
| Wire-OR'able outputs | Four open-drain outputs with weak internal pull-ups allow single-point fault aggregation - simplifies system-level power-good generation |
Applications
| Telecom Power Sequencing | Industrial PLC Supervision |
|---|---|
Use Scenario: Monitoring +3.3V, +2.5V, and two configurable auxiliary rails in a multi-voltage telecom line card requiring precise power-up/down sequencing. IC Role / Device Role / Timing Role: Quad voltage supervisor providing independent fault signals per rail and aggregated "power good" via wire-OR'd outputs. Use Value: Ensures safe startup/shutdown order and prevents latch-up by detecting undervoltage on any monitored rail within 20µs. | Use Scenario: Supervising field I/O power rails (+2.5V analog sensors, +3.3V digital logic) and two programmable auxiliary supplies in an industrial programmable logic controller. IC Role / Device Role / Timing Role: Fault-detection engine generating reset pulses to MCU and isolating faulty modules via discrete OUTx signals. Use Value: Enables deterministic recovery from brownout events using 0.3% hysteresis and guaranteed -40°C to +85°C performance. |
| Embedded Computing Reset Control | Network Switch Rail Monitoring |
Use Scenario: Validating stable +3.3V and +2.5V core/memory rails alongside two adjustable rails for FPGA configuration and PHY interface in a fanless embedded computer. IC Role / Device Role / Timing Role: System-level supervisor feeding reset signals to SoC and FPGA, with OUT1/OUT4 supporting custom voltage thresholds. Use Value: Eliminates external resistor networks while delivering ±1.5% threshold accuracy - reducing design iteration time and test complexity. | Use Scenario: Continuous monitoring of +3.3V management rail, +2.5V SerDes supply, and two auxiliary rails powering PoE controllers and SFP+ modules in a Layer 3 switch. IC Role / Device Role / Timing Role: Real-time voltage integrity checker with propagation delay <20µs - triggers link-down or graceful shutdown before data corruption occurs. Use Value: Prevents packet loss and hardware damage by asserting fault signals faster than ASIC internal watchdog timeout windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6340KUB+T | Same pinout, identical threshold configuration (Adj*/+3.3V/+2.5V/Adj*), but with 5% tolerance instead of 10% | Better suited for high-precision systems where tighter supply tolerance is mandated (e.g., server VRM compliance) | Select MAX6340KUB+T if ±5% trip accuracy is required; otherwise MAX6338KUB+T offers wider margin for noisy environments |
| TPS3307-33DGNR | Triple supervisor (not quad); fixed +3.3V, +2.5V, +1.8V thresholds; no adjustable inputs; 50µA supply current | Lacks second adjustable input and has higher ICC - insufficient for dual-AUX rail monitoring or ultra-low-power designs | Use only if third rail is +1.8V and AUX flexibility is not needed; verify compatibility with existing µMAX footprint and reset timing |
Compared with MAX6340KUB+T and TPS3307-33DGNR, the MAX6338KUB+T uniquely supports two user-adjustable thresholds in a quad-channel configuration with 10% tolerance and lowest ICC (25µA), making it optimal for cost-sensitive, noise-tolerant multirail systems requiring design flexibility.
Availability
MAX6338KUB+T is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial PLCs, and embedded computing applications requiring stable component supply, long-term lifecycle support, and lead-free RoHS-compliant packaging.
Supply support for MAX6338KUB+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX6338 belongs to Maxim's precision voltage supervisor product line, engineered for multivoltage system reliability in space-constrained, thermally demanding applications such as telecom line cards and industrial control units.
FAQ
What is the exact threshold configuration for MAX6338KUB+T?
The MAX6338KUB+T is factory-configured with four input thresholds: IN1 = adjustable (via external resistor divider referenced to 1.23V), IN2 = +3.3V ±10%, IN3 = +2.5V ±10%, and IN4 = adjustable. This matches the "Adj*/3.3/2.5/Adj*" row in the Selector Guide with 10% tolerance. No reprogramming is possible after manufacture.
Can MAX6338KUB+T monitor negative voltages like -5.0V?
No - the MAX6338KUB+T does not support -5.0V monitoring. Its IN1 and IN4 auxiliary inputs are designed for positive adjustable thresholds only (minimum ~1.23V). The -5.0V option appears only in variants like MAX6338MUB/N/PUB; MAX6338KUB+T is strictly for positive-rail supervision.
What is the maximum sink current capability of each output in MAX6338KUB+T?
Each open-drain output of the MAX6338KUB+T can sink up to 20mA continuously, with VOL ≤ 0.4V at ISINK = 2mA (VCC = 5V) and ≤ 0.4V at ISINK = 1.2mA (VCC = 2.5V). This allows direct driving of LEDs, optocouplers, or standard logic inputs without external buffers.
Does MAX6338KUB+T require external bypass capacitance?
Yes - a 0.1µF ceramic capacitor is recommended between VCC and GND, placed as close as possible to the MAX6338KUB+T pins. This stabilizes the internal bandgap reference and suppresses supply noise that could affect threshold accuracy, especially in electrically noisy industrial or telecom environments.
How does the undervoltage lockout (UVLO) function in MAX6338KUB+T?
The MAX6338KUB+T UVLO circuit monitors VCC and forces all four outputs low whenever VCC drops below +2.5V. This ensures clean, predictable reset behavior during power ramp-down or brownout conditions - even if monitored input rails remain above their thresholds - preventing spurious resets or undefined logic states in downstream circuitry.
MAX6338KUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 2.19V, 2.93V, Adj, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- <1ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX6338KUB+T FAQ
1.How can I place an order for MAX6338KUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6338KUB+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 MAX6338KUB+T reliable?
The price and inventory of MAX6338KUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6338KUB+T is usually 5 days.
3.What payment methods are accepted for MAX6338KUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6338KUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6338KUB+T?
MAX6338KUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6338KUB+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 MAX6338KUB+T?
For technical support, including MAX6338KUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6338KUB+T requirements.
6.How does Aetrix verify that MAX6338KUB+T is sourced from the original manufacturer or authorized distributors?
All MAX6338KUB+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 MAX6338KUB+T meets industry standards.
7.What is the process for return or replacement of MAX6338KUB+T?
All MAX6338KUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6338KUB+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 MAX6338KUB+T part is unused and in its original packaging.
Return procedure for MAX6338KUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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