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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:7,467
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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 on IN1 (adjustable), IN2 (+3.3V), IN3 (+2.5V), and IN4 (adjustable), each with ±10% supply tolerance support, 25µA typical supply current, and open-drain active-low outputs in a 10-pin µMAX package - used in desktop computers and industrial equipment for reliable power-good signaling.
For engineers reviewing the MAX6338KUB-T datasheet, MAX6338KUB-T pinout, MAX6338KUB-T application, or MAX6338KUB-T equivalent, this page delivers verified threshold configurations, output behavior under undervoltage lockout, wire-OR compatibility, temperature-stable trip points (-40°C to +85°C), and design-meaningful electrical specs for real-world supervisory circuit implementation.
Technical Context
The MAX6338KUB-T implements four independent comparators, each comparing an input voltage against a precision internal 1.23V bandgap reference via factory-set resistor dividers - IN2 and IN3 are fixed at +3.3V and +2.5V nominal with -10% trip thresholds (2.97V and 2.25V respectively), while IN1 and IN4 are auxiliary inputs configurable using external resistor dividers referenced to the same 1.23V threshold.
Its undervoltage lockout (UVLO) circuit disables all outputs when VCC drops below +2.5V, forcing OUT1–OUT4 low regardless of input states; outputs feature 10µA weak internal pull-ups to VCC and support wire-OR connection without external components, enabling single-point "power good" aggregation across multiple rails.
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 monitoring in battery-backed or low-power systems |
| +3.3V Threshold (−10%) | 2.97V (min) - triggers OUT2 low when +3.3V rail drops below 2.97V, meeting common 10% tolerance spec |
| +2.5V Threshold (−10%) | 2.13V (min) - triggers OUT3 low when +2.5V rail drops below 2.13V, ensuring robust brownout detection |
| Adjustable Threshold Accuracy | 1.20V to 1.26V - internal 1.23V ±2.5% reference enables precise user-defined trip points via resistor divider |
| Output Type | Open-drain, active-low with 10µA internal pull-up - allows flexible logic interfacing and wire-OR summation |
| Operating Temperature | −40°C to +85°C - guaranteed performance across industrial and computing environments |
Pinout & Package
The MAX6338KUB-T is housed in a 10-pin µMAX® package (3.0mm × 3.0mm, 0.6mm height, 0.5mm pitch), thermally enhanced with exposed pad (not electrically connected), compatible with standard reflow profiles and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1 | Auxiliary voltage input | User-configurable threshold via external resistor divider; referenced to 1.23V internal bandgap |
| IN2 | +3.3V monitored input | Factory-set for −10% trip at 2.97V; no external components required |
| IN3 | +2.5V monitored input | Factory-set for −10% trip at 2.13V; internally trimmed resistor network |
| IN4 | Auxiliary voltage input | User-configurable threshold via external resistor divider; identical architecture to IN1 |
| GND | Analog/digital ground reference | Common return for all comparators and UVLO circuitry; must be low-impedance |
| OUT4 | Active-low open-drain output | Goes low when IN4 falls below its threshold; 10µA internal pull-up to VCC |
| OUT3 | Active-low open-drain output | Goes low when IN3 falls below 2.13V; supports wire-OR with other outputs |
| OUT2 | Active-low open-drain output | Goes low when IN2 falls below 2.97V; compatible with 3.3V/5V logic families |
| OUT1 | Active-low open-drain output | Goes low when IN1 falls below user-set threshold; enables custom rail monitoring |
| VCC | Power supply input | +2.5V to +5.5V supply; UVLO forces all outputs low if VCC < +2.5V |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four isolated comparator channels - IN1/IN4 adjustable, IN2/IN3 fixed - enable simultaneous supervision of mixed-voltage domains without cross-talk |
| No external components required | Factory-trimmed resistor dividers eliminate need for external resistors on IN2 and IN3; only IN1/IN4 require external dividers for customization |
| Wire-OR output capability | All outputs are open-drain with weak internal pull-ups - allows direct connection to a shared "power good" bus without external diodes or logic gates |
| Built-in hysteresis | 0.3% typical hysteresis prevents noise-induced oscillation at trip points - eliminates need for external positive feedback networks |
| Undervoltage lockout (UVLO) | Forces all outputs low when VCC drops below +2.5V - ensures valid operation only within specified supply range, preventing undefined behavior |
Applications
| Desktop Computer Power Sequencing | Industrial PLC I/O Module Supervision |
|---|---|
Use Scenario: Monitoring +3.3V, +2.5V, and two auxiliary rails (e.g., +1.2V core and +12V bias) during cold boot and runtime in ATX-compliant motherboards. IC Role / Device Role / Timing Role: Quad voltage monitor providing independent, active-low reset signals per rail to the system controller and PCH. Use Value: Ensures CPU, chipset, and peripheral power rails stabilize before release of main system reset - prevents firmware corruption and hardware lockup. | Use Scenario: Supervising field-side +24V DC, isolated +5V logic, +3.3V FPGA core, and +2.5V ADC reference in modular programmable logic controllers. IC Role / Device Role / Timing Role: Fault-detection front-end that asserts a centralized watchdog timeout signal when any monitored rail deviates beyond tolerance. Use Value: Enables deterministic fail-safe shutdown within <20µs propagation delay - meets SIL-2 functional safety requirements for industrial control. |
| Networking Equipment Board-Level Reset | High-End Printer Engine Control |
Use Scenario: Validating +5V, +3.3V, +2.5V, and adjustable +1.8V SoC I/O rail in 10G Ethernet switch line cards operating in extended temperature environments. IC Role / Device Role / Timing Role: System-level power supervisor generating synchronized reset pulses to ASICs, PHYs, and management microcontrollers. Use Value: Guarantees −40°C to +85°C operation with <±2.5% threshold drift - eliminates false resets due to thermal drift in telecom infrastructure. | Use Scenario: Monitoring high-current +24V motor drive, +5V logic, +3.3V sensor interface, and adjustable +15V HV bias in laser print engine subsystems. IC Role / Device Role / Timing Role: Real-time rail integrity checker feeding status to the print engine MCU for dynamic fault response and error logging. Use Value: Detects rail collapse during high-draw fuser cycles with 25µA quiescent current - extends standby battery life in energy-efficient printer designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6340KUB-T | Same pinout and package; identical IN1/IN2/IN3/IN4 configuration (Adj/+3.3V/+2.5V/Adj), but with −5% tolerance instead of −10% | Designed for tighter-tolerance systems where +3.3V and +2.5V rails require 3.135V and 2.375V trip points respectively | Select MAX6340KUB-T only if system specifications mandate 5% supply tolerance compliance over 10% |
| TPS3307-33D | Triple-monitor IC (not quad); fixed +3.3V, +3.3V, +3.3V thresholds; no adjustable inputs; requires external components for non-3.3V rails | Limited to triple-rail monitoring; lacks auxiliary inputs and mixed-voltage flexibility of MAX6338KUB-T | Choose only for cost-sensitive 3-rail-only applications where IN1/IN4 adjustability and +2.5V monitoring are unnecessary |
Compared with MAX6340KUB-T, the MAX6338KUB-T provides looser but more robust 10% trip thresholds suitable for noisy industrial rails; versus TPS3307-33D, it delivers true quad-rail coverage with two user-adjustable inputs - critical for heterogeneous power architectures requiring both fixed and custom voltage supervision.
Availability
MAX6338KUB-T is available at Aetrix Electronics and suitable for desktop computers, industrial PLCs, and networking equipment requiring stable component supply, long-term lifecycle assurance, and guaranteed −40°C to +85°C performance.
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, computing, and communications markets.
The MAX6338 family was engineered specifically for multivoltage system supervision in space-constrained, thermally demanding environments - delivering accurate, low-power, pin-compatible voltage monitoring across diverse computing and industrial platforms.
FAQ
What voltage thresholds does the MAX6338KUB-T monitor by default?
The MAX6338KUB-T monitors IN1 (adjustable via external resistor divider), IN2 (+3.3V nominal, −10% trip at 2.97V), IN3 (+2.5V nominal, −10% trip at 2.13V), and IN4 (adjustable). Factory trimming eliminates need for external components on IN2 and IN3. The MAX6338KUB-T uses an internal 1.23V bandgap reference for all thresholds, enabling precise user-defined settings on IN1 and IN4.
Can the MAX6338KUB-T monitor negative voltages like −5.0V?
No - the MAX6338KUB-T variant is configured for IN1 (adjustable), IN2 (+3.3V), IN3 (+2.5V), and IN4 (adjustable), with no −5.0V input enabled. Other variants like MAX6338MUB support −5.0V monitoring; the MAX6338KUB-T's pinout and internal resistor network are optimized exclusively for positive adjustable/fixed combinations.
How does the undervoltage lockout (UVLO) function in the MAX6338KUB-T?
The MAX6338KUB-T's UVLO circuit forces all four outputs (OUT1–OUT4) low whenever VCC drops below +2.5V, regardless of input voltage states. This ensures the device remains in a known, safe state during brownout conditions. The MAX6338KUB-T continues to operate down to VCC = +1V, but outputs stay asserted low until VCC rises above the UVLO threshold.
Is the MAX6338KUB-T compatible with wire-OR output configurations?
Yes - all four outputs of the MAX6338KUB-T are open-drain with 10µA internal pull-ups to VCC, enabling direct wire-OR connection to generate a single aggregated "power good" signal. No external diodes or logic gates are needed. The MAX6338KUB-T maintains full functionality in this configuration across its full temperature range.
What is the propagation delay specification for the MAX6338KUB-T?
The MAX6338KUB-T has a typical propagation delay of 20µs from input crossing threshold to output transition, measured with 50mV overdrive. This delay remains stable across −40°C to +85°C and is independent of supply voltage within the +2.5V to +5.5V range. The MAX6338KUB-T's consistent timing enables predictable reset assertion in time-critical systems.
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:
- Bulk
- 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
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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