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Analog Devices Inc./Maxim Integrated MAX6338KUB+TG35
- Part No.:
- MAX6338KUB+TG35
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6338KUB+TG35.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,277
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Product details
Overview
MAX6338KUB+TG35 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. It is used in desktop computers and industrial equipment to validate power rail integrity during startup and operation.
For engineers reviewing the MAX6338KUB+TG35 datasheet, MAX6338KUB+TG35 pinout, MAX6338KUB+TG35 application, or MAX6338KUB+TG35 equivalent, this page delivers verified electrical parameters, µMAX package layout, real-world use cases, and validated alternative options for power-rail monitoring in embedded and computing systems.
Technical Context
The MAX6338KUB+TG35 integrates four independent comparators, each with an internal 1.23V bandgap reference and factory-set resistor dividers for IN2 (+3.3V) and IN3 (+2.5V), while IN1 and IN4 are auxiliary inputs configurable via external resistor dividers for user-adjustable thresholds. All outputs are open-drain with 10µA weak internal pull-ups to VCC.
It features built-in 0.3% hysteresis per channel, undervoltage lockout (UVLO) that forces all outputs low when VCC drops below +2.5V, and guaranteed operation from –40°C to +85°C. Threshold accuracy is maintained across VCC = +2.5V to +5.5V without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - supports direct connection to monitored rails or dedicated bias supply |
| 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 trip points across industrial temperature range |
| Threshold Tempco | 60ppm/°C - minimizes drift-induced false triggers in thermally varying environments |
| Propagation Delay | 20µs - provides deterministic response time for fast-fail detection in critical power sequencing |
| Output Type | Open-drain, active-low, 10µA internal pull-up - allows wire-ORing into single "power good" bus |
| Input Tolerance | 10% below nominal - matches common DC-DC converter output tolerances for robust margining |
Pinout & Package
The MAX6338KUB+TG35 is housed in a 10-pin µMAX® package (3.0mm × 3.0mm, 0.6mm height, 0.5mm pitch), RoHS-compliant and lead-free (indicated by + suffix).
| 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) | Fixed +3.3V monitor input | Factory-trimmed for 3.3V ±10%; no external components required |
| 3 (IN3) | Fixed +2.5V monitor input | Factory-trimmed for 2.5V ±10%; optimized for core logic rail supervision |
| 4 (IN4) | Auxiliary input | User-adjustable threshold via external resistor divider; identical architecture to IN1 |
| 5 (GND) | Analog/digital ground | Common reference for all comparators and UVLO circuitry |
| 6 (OUT4) | Active-low open-drain output | Asserts low when IN4 falls below its threshold; 10µA internal pull-up to VCC |
| 7 (OUT3) | Active-low open-drain output | Asserts low when IN3 falls below +2.5V threshold; compatible with 1.8V–5.5V logic |
| 8 (OUT2) | Active-low open-drain output | Asserts low when IN2 falls below +3.3V threshold; supports wire-OR with other outputs |
| 9 (OUT1) | Active-low open-drain output | Asserts low when IN1 falls below user-set threshold; enables custom rail monitoring |
| 10 (VCC) | Power supply input | +2.5V to +5.5V bias; UVLO disables all outputs if VCC drops below +2.5V |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four separate comparator channels with individual outputs - enables discrete fault isolation per rail |
| Factory-trimmed +3.3V/+2.5V thresholds | Eliminates calibration resistors and layout area for standard I/O and core rails |
| Two auxiliary inputs (IN1, IN4) | Supports user-defined thresholds (e.g., +1.2V, +4.2V) using only two external resistors per input |
| Built-in 0.3% hysteresis | Prevents output oscillation near trip point - removes need for external positive feedback networks |
| Wire-ORable open-drain outputs | Enables single "power good" signal generation across multiple rails without external logic |
Applications
| Desktop Computer Power Sequencing | Industrial PLC I/O Module Supervision |
|---|---|
|
Use Scenario: Monitoring +5V standby, +3.3V main, +2.5V core, and +1.8V memory rails during cold boot and thermal stress. IC Role / Device Role / Timing Role: Quad voltage monitor providing independent, active-low fault signals per rail to host microcontroller GPIOs. Use Value: Detects undervoltage on any rail within 20µs and holds reset until all rails stabilize - prevents firmware corruption during brownout. |
Use Scenario: Validating isolated +24V field power, +5V logic, +3.3V FPGA I/O, and +12V analog supply in programmable logic controller modules. IC Role / Device Role / Timing Role: System-level supervisor IC interfacing with watchdog timer and safety shutdown logic. Use Value: Enables fail-safe shutdown before out-of-spec voltage damages field-connected sensors or actuators. |
| Notebook Embedded Controller Support | Networking Switch ASIC Power Validation |
|
Use Scenario: Real-time monitoring of +5V, +3.3V, +2.5V, and adjustable +1.05V GPU core rail in embedded controller subsystem. IC Role / Device Role / Timing Role: Dedicated voltage supervisor feeding EC interrupt lines for dynamic rail management and thermal throttling coordination. Use Value: Provides deterministic timing margin (20µs delay) for EC-driven rail resequencing without software latency. |
Use Scenario: Verifying +12V backplane, +3.3V SerDes, +2.5V PHY, and adjustable +1.5V switch fabric rails in 10G Ethernet line cards. IC Role / Device Role / Timing Role: Hardware-based power-good arbiter feeding FPGA configuration state machine and link training logic. Use Value: Ensures ASIC configuration only proceeds after all four critical supplies meet 10% tolerance window - avoids configuration lockup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E33DBZR | Single 3.3V supervisor with reset timeout; no quad capability or auxiliary inputs | Only monitors one rail; requires three additional devices to match MAX6338KUB+TG35 functionality | Select when cost-per-rail is prioritized over integration and board space |
| ADM1266ACPZ | 16-channel PMBus-configurable supervisor with sequencing, margining, and telemetry | Requires digital interface, firmware, and external EEPROM; significantly higher BOM and design complexity | Select when programmable sequencing, fault logging, or multi-board coordination is required |
Compared with TLV809E33DBZR and ADM1266ACPZ, the MAX6338KUB+TG35 delivers optimal balance of integration, zero-configuration analog supervision, and µMAX footprint - ideal for fixed-rail systems where simplicity, reliability, and minimal PCB area are primary constraints.
Availability
MAX6338KUB+TG35 is available at Aetrix Electronics and suitable for desktop computers, industrial PLCs, notebook embedded controllers, and networking switches requiring stable component supply and long-term obsolescence management.
Supply support for MAX6338KUB+TG35 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 connectivity applications, with deep expertise in supervisory circuits and power management.
The MAX6338 product line targets multivoltage system supervision in computing, telecom, and industrial equipment - delivering integrated, low-power, and pin-efficient solutions for reliable power-rail validation without microcontroller dependency.
FAQ
What is the exact threshold voltage for IN1 and IN4 on the MAX6338KUB+TG35?
The MAX6338KUB+TG35 uses auxiliary inputs for IN1 and IN4, each referenced to a precise 1.23V internal bandgap. The actual trip voltage is set externally using a resistor divider: VTH = 1.23V × (1 + R1/R2). For example, with R2 = 100kΩ and R1 = 265kΩ, IN1 triggers at 4.5V. No factory trim is applied - full user configurability is retained.
Does the MAX6338KUB+TG35 support monitoring negative voltages like -5.0V?
No - the MAX6338KUB+TG35 variant is configured for Adj*/+3.3V/+2.5V/Adj* thresholds per the Selector Guide. While the MAX6338 family includes -5.0V-capable versions (e.g., MAX6338MUB), the KUB variant does not include a dedicated -5V input channel or internal circuitry for negative rail monitoring.
Can the outputs of the MAX6338KUB+TG35 be directly tied together for a single "power good" signal?
Yes - all four outputs (OUT1–OUT4) are open-drain and active-low, with 10µA internal pull-ups to VCC. They can be wire-ORed to a common node pulled up externally (e.g., to +3.3V) to generate a composite "all-rails-good" signal. This is explicitly supported in the datasheet and requires no additional logic.
What is the minimum VCC required for the MAX6338KUB+TG35 to maintain valid output states?
The MAX6338KUB+TG35 incorporates an internal undervoltage lockout (UVLO) that forces all outputs low when VCC drops below +2.5V. Valid comparator operation and threshold accuracy are guaranteed only above +2.5V; below this, the device enters a known-safe state with all outputs asserted low - a critical safety feature for brownout conditions.
Is the MAX6338KUB+TG35 pin-compatible with other MAX6338 variants like MAX6338JUB or MAX6338IUB?
No - while all MAX6338 variants share the same 10-pin µMAX package and pinout, the MAX6338KUB+TG35 differs in factory-programmed threshold assignments (Adj*/+3.3V/+2.5V/Adj* with 10% tolerance). Swapping with JUB (5V/3.3V/2.5V†/1.8V†, 5%) or IUB (5V/3.3V/2.5V/1.8V, 10%) would result in incorrect trip points for IN1 and IN4, requiring schematic and layout review before substitution.
MAX6338KUB+TG35 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:
- Obsolete
- 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+TG35 FAQ
1.How can I place an order for MAX6338KUB+TG35 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6338KUB+TG35 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+TG35 reliable?
The price and inventory of MAX6338KUB+TG35 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6338KUB+TG35 is usually 5 days.
3.What payment methods are accepted for MAX6338KUB+TG35?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6338KUB+TG35 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6338KUB+TG35?
MAX6338KUB+TG35 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6338KUB+TG35 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+TG35?
For technical support, including MAX6338KUB+TG35 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6338KUB+TG35 requirements.
6.How does Aetrix verify that MAX6338KUB+TG35 is sourced from the original manufacturer or authorized distributors?
All MAX6338KUB+TG35 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+TG35 meets industry standards.
7.What is the process for return or replacement of MAX6338KUB+TG35?
All MAX6338KUB+TG35 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6338KUB+TG35, 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+TG35 part is unused and in its original packaging.
Return procedure for MAX6338KUB+TG35:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6338KUB+TG35 Tags
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MIC826SYMT-TR
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