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Analog Devices Inc./Maxim Integrated MAX6338GUB+T
- Part No.:
- MAX6338GUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6338GUB+T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,598
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Product details
Overview
MAX6338GUB+T from Maxim Integrated is a quad voltage monitor IC designed for multivoltage system supervision, monitoring +5.0V, +3.0V, +1.8V, and an adjustable input (based on 1.23V internal reference), with ±10% supply tolerance per channel, 25µA typical supply current, and operation from +2.5V to +5.5V over –40°C to +85°C - used in desktop computers and industrial equipment for reliable power-good signaling.
For engineers reviewing the MAX6338GUB+T datasheet, MAX6338GUB+T pinout, MAX6338GUB+T application, or MAX6338GUB+T equivalent, key selection considerations include factory-programmed threshold voltages per input, open-drain active-low outputs with internal 10µA pull-ups, undervoltage lockout below 2.5V, µMAX package footprint, and compatibility with wire-ORed "power good" logic.
Technical Context
The MAX6338GUB+T integrates four independent comparators, each with a dedicated input and open-drain output, where IN1–IN3 are factory-set to +5.0V, +3.0V, and +1.8V nominal thresholds (–10% trip point), and IN4 is configurable via external resistor divider referenced to the 1.23V bandgap.
Internal hysteresis (0.3%) eliminates external feedback components; undervoltage lockout forces all outputs low when VCC drops below 2.5V; and propagation delay is 20µs with 100mV overdrive - enabling deterministic reset timing in complex power-up sequences.
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 +5V systems without level-shifting. |
| Supply Current (typ) | 25µA at +5V - enables use in always-on supervisory circuits without significant battery drain. |
| Threshold Accuracy | ±1.5% over temperature - ensures reliable trip points across –40°C to +85°C without calibration. |
| Propagation Delay | 20µs (100mV overdrive) - provides fast response to supply droop while avoiding noise-induced false triggers. |
| Output Type | Four open-drain, active-low outputs with 10µA internal pull-ups to VCC - allows flexible wire-OR configuration and interface with 1.8V–5.5V logic. |
| Threshold Hysteresis | 0.3% - built-in, eliminating need for external hysteresis resistors and simplifying PCB layout. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and computing environments with no derating required. |
Pinout & Package
The MAX6338GUB+T is housed in a 10-pin µMAX® package (3.0mm × 3.0mm, 0.6mm height, 0.5mm pitch), compatible with standard surface-mount reflow processes and offering high-density integration in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1) | +5.0V Monitor Input | Factory-trimmed for –10% trip at 4.50V; connects directly to +5V rail under supervision. |
| 2 (IN2) | +3.0V Monitor Input | Factory-trimmed for –10% trip at 2.70V; monitors core or I/O supply in dual-voltage systems. |
| 3 (IN3) | +1.8V Monitor Input | Factory-trimmed for –10% trip at 1.62V; supports low-voltage logic and processor core supplies. |
| 4 (IN4) | Adjustable Input | High-impedance comparator input referenced to 1.23V internal bandgap; configured via external resistor divider. |
| 5 (GND) | Analog/Digital Ground | Common reference for all inputs, outputs, and internal reference; must be low-impedance connection. |
| 6 (OUT4) | Active-Low Output 4 | Open-drain output asserting low when IN4 falls below its threshold; internally pulled up to VCC with 10µA. |
| 7 (OUT3) | Active-Low Output 3 | Open-drain output asserting low when IN3 falls below 1.62V; shares wire-OR capability with other OUTx pins. |
| 8 (OUT2) | Active-Low Output 2 | Open-drain output asserting low when IN2 falls below 2.70V; compatible with 1.8V–5.5V logic families. |
| 9 (OUT1) | Active-Low Output 1 | Open-drain output asserting low when IN1 falls below 4.50V; used for primary "power good" indication. |
| 10 (VCC) | Power Supply Input | +2.5V to +5.5V supply; powers internal circuitry and sources internal pull-ups; includes UVLO activation at <2.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four discrete comparator channels with dedicated inputs/outputs - enables simultaneous supervision of heterogeneous supply domains without shared timing constraints. |
| Factory-trimmed thresholds | +5.0V, +3.0V, +1.8V (–10% trip) on IN1–IN3 - eliminates external resistor networks and reduces BOM count and layout area. |
| Adjustable fourth input | IN4 accepts user-defined threshold via resistor divider off 1.23V reference - supports custom rails like +2.8V, +4.2V, or negative supplies (e.g., –5V with proper configuration). |
| Low-power operation | 25µA typical ICC - allows continuous monitoring in battery-backed or energy-sensitive applications without compromising runtime. |
| Integrated hysteresis | 0.3% built-in hysteresis per channel - prevents chatter during slow-moving or noisy supply transitions without external components. |
Applications
| Desktop Computer Power Sequencing | Industrial PLC Power Supervision |
|---|---|
Use Scenario: Monitoring +5V, +3.0V, +1.8V, and auxiliary 3.3V rails during cold boot and brownout conditions in x86-based motherboards. IC Role / Device Role / Timing Role: Quad voltage monitor providing independent, active-low reset signals to CPU and chipset, ensuring sequenced power-up and safe shutdown. Use Value: Eliminates need for four discrete supervisors or microcontroller polling, reducing firmware complexity and improving deterministic reset timing. | Use Scenario: Supervising multiple isolated DC supplies (+5V logic, +24V I/O, +3.0V sensor, and –5V analog bias) in programmable logic controller backplanes. IC Role / Device Role / Timing Role: System-level power integrity checker generating consolidated "system OK" signal via wire-OR'd outputs to PLC watchdog timer. Use Value: Enables single-chip detection of multi-rail failure modes (e.g., +24V sag + +3.0V dropout), improving fault coverage without additional logic gates. |
| Notebook Computer Battery Backup Circuit | Telecom Line Card Voltage Monitoring |
Use Scenario: Continuous monitoring of main +5V, standby +3.0V, DDR memory +1.8V, and coin-cell backup voltage in ultra-thin laptop platforms. IC Role / Device Role / Timing Role: Always-on supervisor maintaining RTC and BIOS state integrity by asserting reset if any monitored rail deviates beyond –10%. Use Value: 25µA quiescent current extends battery life during suspend-to-RAM; µMAX package fits tight space near southbridge. | Use Scenario: Detecting undervoltage events on +5V, +3.3V, +1.8V, and –48V bias rails in carrier-grade Ethernet line cards operating in NEBS-compliant enclosures. IC Role / Device Role / Timing Role: Fault-detection front-end feeding alarm status to management MCU via open-drain interrupt lines. Use Value: Factory-trimmed thresholds ensure compliance with Telcordia GR-63-CORE voltage tolerance requirements without calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6340GUB+T | Same pinout and package; identical +5.0V/+3.0V/+1.8V thresholds but –5% tolerance (not –10%) on IN1–IN3. | Requires tighter supply regulation; less margin for aging or load transients on monitored rails. | Select MAX6340GUB+T only if system design guarantees ≤5% supply variation and needs faster trip response due to lower hysteresis. |
| TPS3307-33DGNR | Triple monitor (not quad); fixed +3.3V, +3.0V, +1.8V thresholds; no adjustable input; 1.6µA supply current. | Lacks fourth channel and configurability; requires external circuitry for auxiliary rail monitoring. | Choose TPS3307-33DGNR only for cost-sensitive, triple-rail-only applications where ultra-low ICC outweighs missing IN4 flexibility. |
Compared with MAX6340GUB+T and TPS3307-33DGNR, the MAX6338GUB+T uniquely delivers four-channel supervision with one adjustable input and –10% tolerance - making it optimal for legacy or margin-constrained systems requiring robust, component-free multirail validation.
Availability
MAX6338GUB+T is available at Aetrix Electronics and suitable for desktop computers, industrial PLCs, notebook computers, and telecom line cards requiring stable component supply and long-term production continuity.
Supply support for MAX6338GUB+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 MAX6338GUB+T belongs to Maxim's precision voltage supervisor product line, engineered specifically for multivoltage system power sequencing, reset generation, and fault detection in space- and power-constrained embedded platforms.
FAQ
What is the exact threshold voltage for each input on the MAX6338GUB+T?
The MAX6338GUB+T has factory-programmed thresholds: IN1 trips at 4.50V (–10% of +5.0V), IN2 at 2.70V (–10% of +3.0V), IN3 at 1.62V (–10% of +1.8V), and IN4 is adjustable using an external resistor divider referenced to the 1.23V internal bandgap. These values are guaranteed over –40°C to +85°C with ±1.5% accuracy.
Does the MAX6338GUB+T require external components to operate?
No, the MAX6338GUB+T requires no external components for basic operation. All four thresholds are factory-trimmed, internal pull-ups (10µA) eliminate need for external resistors on outputs, and built-in 0.3% hysteresis removes requirement for feedback networks - enabling full functionality with only VCC, GND, and monitored supply connections.
Can the MAX6338GUB+T monitor negative voltages?
The MAX6338GUB+T itself does not support direct –5V monitoring on IN1–IN3, but the adjustable IN4 input can be configured for negative rails using appropriate external resistor topology and referencing - though the standard MAX6338GUB+T variant is specified for +5.0V/+3.0V/+1.8V plus adjustable positive rails. For native –5V monitoring, MAX6338MUB or MAX6338NUB variants are designated.
How does the undervoltage lockout (UVLO) function in the MAX6338GUB+T?
The MAX6338GUB+T includes an internal UVLO circuit that forces all four outputs low whenever VCC drops below 2.5V - the minimum operating voltage. This ensures clean, predictable reset behavior during power ramp-down or brownout, even if monitored supplies remain active, preventing spurious logic states in downstream circuitry.
Is the MAX6338GUB+T pin-compatible with other MAX6338 variants?
Yes, all MAX6338 variants (e.g., MAX6338AUB+T through MAX6338PUB+T) share identical 10-pin µMAX package, pinout, and electrical interface - only the factory-programmed threshold voltages and tolerances differ. This allows drop-in replacement across the family for design reuse and BOM optimization without PCB changes.
MAX6338GUB+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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 1.58V, 2.63V, 4.38V, 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
MAX6338GUB+T FAQ
1.How can I place an order for MAX6338GUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6338GUB+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 MAX6338GUB+T reliable?
The price and inventory of MAX6338GUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6338GUB+T is usually 5 days.
3.What payment methods are accepted for MAX6338GUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6338GUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6338GUB+T?
MAX6338GUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6338GUB+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 MAX6338GUB+T?
For technical support, including MAX6338GUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6338GUB+T requirements.
6.How does Aetrix verify that MAX6338GUB+T is sourced from the original manufacturer or authorized distributors?
All MAX6338GUB+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 MAX6338GUB+T meets industry standards.
7.What is the process for return or replacement of MAX6338GUB+T?
All MAX6338GUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6338GUB+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 MAX6338GUB+T part is unused and in its original packaging.
Return procedure for MAX6338GUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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