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Analog Devices Inc./Maxim Integrated MAX6338GUB
- Part No.:
- MAX6338GUB
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6338GUB.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:14,447
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Product details
Overview
MAX6338GUB from Maxim Integrated is a quad voltage monitor IC designed to supervise four independent power rails-specifically +5.0V, +3.0V, +1.8V, and an adjustable input-in multivoltage systems. It features factory-trimmed thresholds with ±10% tolerance, 25µA typical supply current, open-drain active-low outputs with internal 10µA pull-ups to VCC, and operates from +2.5V to +5.5V across –40°C to +85°C. It is used in desktop computers and industrial equipment for reliable power-good signaling.
For engineers reviewing the MAX6338GUB datasheet, MAX6338GUB pinout, MAX6338GUB application, or MAX6338GUB equivalent, key selection criteria include its fixed +5.0V/+3.0V/+1.8V monitoring configuration, adjustable fourth input (based on 1.23V internal reference), guaranteed temperature stability, wire-ORable outputs, and µMAX package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6338GUB integrates four independent comparators, each with a dedicated input and open-drain output. Its threshold voltages are factory-set: IN1 = +5.0V (–10%), IN2 = +3.0V (–10%), IN3 = +1.8V (–10%), and IN4 = adjustable via external resistor divider referenced to the internal 1.23V bandgap.
An undervoltage lockout circuit disables all outputs when VCC drops below +2.5V, and built-in 0.3% hysteresis eliminates external feedback components. All inputs feature high-impedance sensing, and outputs interface directly with TTL/CMOS logic without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - supports direct connection to monitored rails or auxiliary bias supply |
| Quiescent Current | 25µA (typ) at +5V - enables always-on supervision in battery-backed or low-power systems |
| Input Thresholds | +5.0V (–10%), +3.0V (–10%), +1.8V (–10%), adjustable - matches common CPU/core/memory rail tolerances |
| Output Type | Four open-drain, active-low outputs with 10µA internal pull-ups - allows wire-ORing into single system reset or power-good signal |
| Temperature Range | –40°C to +85°C - fully specified for industrial and computing environments without derating |
| Threshold Accuracy | ±1.5% over temperature - ensured by internal bandgap reference and laser trimming |
| Propagation Delay | 20µs (typ) - provides fast fault response while avoiding noise-induced false triggers |
Pinout & Package
The MAX6338GUB is housed in a 10-pin µMAX® package (3.0mm × 3.0mm, 0.6mm height), compatible with standard surface-mount assembly processes and space-constrained applications such as notebook motherboards and telecom line cards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1) | +5.0V monitor input | Fixed threshold of 4.50V (–10%); asserts OUT1 low when voltage falls below trip point |
| 2 (IN2) | +3.0V monitor input | Fixed threshold of 2.70V (–10%); drives OUT2 low on undervoltage condition |
| 3 (IN3) | +1.8V monitor input | Fixed threshold of 1.62V (–10%); activates OUT3 upon drop below nominal rail |
| 4 (IN4) | Adjustable monitor input | Accepts external resistor divider; threshold set relative to 1.23V internal reference |
| 5 (GND) | Analog/digital ground | Common return path for all comparators and internal reference; must be low-impedance |
| 6 (OUT4) | Active-low output for IN4 | Open-drain; pulled up internally to VCC (10µA); sinks ≥2mA at 0.4V |
| 7 (OUT3) | Active-low output for IN3 | Open-drain; identical electrical behavior to OUT4; supports shared reset bus |
| 8 (OUT2) | Active-low output for IN2 | Open-drain; compatible with 3.3V/5V logic families; no external pull-up required |
| 9 (OUT1) | Active-low output for IN1 | Open-drain; synchronized timing with other outputs; enables unified power-good assertion |
| 10 (VCC) | Positive supply input | +2.5V to +5.5V; powers internal reference, comparators, and pull-ups; UVLO active below 2.5V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed triple fixed thresholds | +5.0V, +3.0V, +1.8V each with –10% trip points - eliminates calibration effort for standard rail monitoring |
| Adjustable fourth input | Configurable via resistor divider off 1.23V reference - supports custom rails (e.g., +2.8V, +4.2V) without redesign |
| Built-in 0.3% hysteresis | Prevents chatter near threshold without external components - improves noise immunity in electrically noisy systems |
| Internal 10µA pull-ups | Enables immediate logic-level compatibility with microcontrollers and FPGAs - removes need for discrete pull-up resistors |
| Undervoltage lockout (UVLO) | Forces all outputs low when VCC < +2.5V - ensures valid state during power ramp-up/down sequences |
Applications
| Desktop Computer Power Sequencing | Industrial PLC I/O Module Supervision |
|---|---|
Use Scenario: Monitoring +5V standby, +3.0V core, +1.8V memory, and +2.5V analog supply during boot and runtime. IC Role / Device Role / Timing Role: Quad voltage supervisor providing independent, active-low reset signals per rail to coordinate processor initialization and peripheral enable timing. Use Value: Eliminates discrete supervisor ICs and reduces BOM count by consolidating four rail monitors into one 10-pin µMAX device. | Use Scenario: Ensuring stable operation of digital I/O banks, analog sensor interfaces, FPGA configuration voltage, and isolated communication supplies in programmable logic controllers. IC Role / Device Role / Timing Role: Fault-detection hub generating consolidated "system healthy" status via wire-ORed outputs to watchdog timer or host controller. Use Value: Delivers deterministic undervoltage response (<20µs) across –40°C to +85°C, meeting industrial environmental requirements without derating. |
| Notebook Motherboard Rail Validation | Telecom Line Card Power Integrity |
Use Scenario: Validating +5V USB, +3.0V chipset, +1.8V DDR interface, and adjustable +1.2V GPU core supply in ultra-thin laptop designs. IC Role / Device Role / Timing Role: Space-optimized power supervisor enabling compact layout with minimal passive components. Use Value: 3.0mm × 3.0mm µMAX footprint saves >40% board area versus SOIC-16 alternatives while maintaining full functionality. | Use Scenario: Supervising +5V management bus, +3.3V SerDes, +1.8V PHY, and adjustable –48V bias supply in carrier-grade optical modules. IC Role / Device Role / Timing Role: High-reliability voltage monitor with guaranteed performance over extended temperature range and long-term stability. Use Value: Internal bandgap reference and laser-trimmed thresholds ensure ±1.5% accuracy over life, reducing field failure risk in mission-critical infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6339GUB | Same pinout and package; differs only in supply tolerance: IN1–IN3 use –5% thresholds instead of –10% | Better suited for tighter-tolerance rails (e.g., +3.3V ±3% FPGA supplies) where earlier fault detection is required | Select MAX6339GUB if system design mandates faster trip response at smaller voltage deviations |
| TPS3307-33D | Triple-supply monitor (not quad); includes manual reset input and separate reset delay; no adjustable input | Lacks fourth channel and programmability; requires external components for adjustable monitoring | Choose TPS3307-33D only when exactly three fixed rails need supervision and reset timing control is critical |
Compared with MAX6339GUB and TPS3307-33D, the MAX6338GUB uniquely delivers four-channel supervision with one adjustable input in a 10-pin µMAX package, making it optimal for compact multirail systems requiring flexibility without added passives or layout overhead.
Availability
MAX6338GUB is available at Aetrix Electronics and suitable for desktop computers, industrial PLCs, notebook motherboards, and telecom line cards requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX6338GUB 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 semiconductor company specializing in precision analog, mixed-signal, and power-management ICs for industrial, computing, communications, and automotive markets.
The MAX6338 product line delivers highly integrated, low-power voltage supervisors targeting multivoltage system monitoring in space- and power-constrained applications such as computing platforms and industrial controls.
FAQ
What is the exact input voltage configuration for MAX6338GUB?
The MAX6338GUB is factory-configured to monitor +5.0V (–10% threshold = 4.50V), +3.0V (–10% = 2.70V), +1.8V (–10% = 1.62V), and an adjustable input referenced to the internal 1.23V bandgap. This configuration is fixed per the ordering code 'G' in the Selector Guide and cannot be modified post-manufacture.
Does MAX6338GUB require external components for basic operation?
No, MAX6338GUB requires no external components for monitoring its three fixed rails. For the adjustable input (IN4), a two-resistor divider is needed to set the desired threshold. A 0.1µF bypass capacitor on VCC is recommended for noisy environments but not strictly required for functional operation.
Can MAX6338GUB outputs be connected together to form a single power-good signal?
Yes, all four open-drain outputs of MAX6338GUB have weak internal 10µA pull-ups to VCC and are designed for wire-OR connection. When any monitored supply fails, its corresponding output pulls low, asserting the combined signal - ideal for feeding a single system reset or watchdog input.
What is the minimum VCC voltage at which MAX6338GUB remains functional?
MAX6338GUB operates down to +2.5V VCC. Below this, its internal undervoltage lockout (UVLO) circuit forces all outputs low regardless of input conditions. The device remains powered and functional above +2.5V, with full specification compliance from +2.5V to +5.5V.
Is MAX6338GUB compatible with negative supply monitoring?
No, MAX6338GUB does not support negative input monitoring. While the MAX6338 family includes variants like MAX6338MUB for –5.0V, the 'G' version is configured exclusively for +5.0V, +3.0V, +1.8V, and adjustable positive inputs. Negative rail supervision requires selecting a different variant (e.g., MAX6338MUB).
MAX6338GUB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 1.8V, 3V, 5V, 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 FAQ
1.How can I place an order for MAX6338GUB through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6338GUB 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 reliable?
The price and inventory of MAX6338GUB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6338GUB is usually 5 days.
3.What payment methods are accepted for MAX6338GUB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6338GUB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6338GUB?
MAX6338GUB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6338GUB 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?
For technical support, including MAX6338GUB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6338GUB requirements.
6.How does Aetrix verify that MAX6338GUB is sourced from the original manufacturer or authorized distributors?
All MAX6338GUB 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 meets industry standards.
7.What is the process for return or replacement of MAX6338GUB?
All MAX6338GUB units undergo pre-shipment inspection (PSI). If there is an issue with MAX6338GUB, 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 part is unused and in its original packaging.
Return procedure for MAX6338GUB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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