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Analog Devices Inc./Maxim Integrated MAX6338OUB+
- Part No.:
- MAX6338OUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6338OUB+.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:132
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Product details
Overview
MAX6338OUB+ from Maxim Integrated is a quad voltage monitor IC designed for multivoltage system supervision, monitoring +5.0V, +3.3V, adjustable (via resistor divider), and -5.0V supplies with factory-trimmed 10% tolerance thresholds. It delivers 25µA typical supply current, operates from +2.5V to +5.5V, and guarantees performance across -40°C to +85°C. Used in telecom power sequencing and industrial control boards where reliable, component-free voltage fault detection is critical.
For engineers reviewing the MAX6338OUB+ datasheet, MAX6338OUB+ pinout, MAX6338OUB+ application, or MAX6338OUB+ equivalent, this page provides verified electrical parameters, confirmed µMAX package mapping, validated open-drain output behavior, and real-world supervisory use cases - all extracted from Maxim's official 19-1695 Rev 2 documentation.
Technical Context
The MAX6338OUB+ integrates four independent comparators, each with a dedicated open-drain active-low output and internal 10µA pull-up to VCC. Inputs IN1–IN4 are configured for +5.0V, +3.3V, adjustable (1.23V reference-based), and -5.0V monitoring respectively, with trip thresholds guaranteed over temperature via an internal bandgap reference.
Hysteresis is built-in at 0.3%, eliminating external feedback networks. An undervoltage lockout circuit forces all outputs low when VCC drops below +2.5V, and the device supports wire-ORed "power good" signaling without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - powers directly from monitored +3.3V or +5V rails without auxiliary regulator |
| Supply Current (typ) | 25µA at +5V - enables always-on supervision in battery-backed or low-power systems |
| Threshold Accuracy | ±1.5% over -40°C to +85°C - ensures reliable reset assertion across industrial temperature range |
| Output Type | Four independent open-drain, active-low outputs with 10µA internal pull-ups - allows flexible logic interfacing and wire-OR configuration |
| Input Thresholds | +5.0V (-10%), +3.3V (-10%), adjustable (1.23V ref), -5.0V (+10%) - matches common rail tolerances and negative bias requirements |
| Propagation Delay | 20µs max - provides fast fault response for critical power sequencing |
| Threshold Hysteresis | 0.3% - prevents noise-induced chatter without external resistors |
Pinout & Package
The MAX6338OUB+ is housed in a 10-pin µMAX® package (3.0mm × 3.0mm, 0.6mm height), RoHS-compliant and available in lead-free format (indicated by '+' suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1) | +5.0V input | Monitors nominal +5.0V supply with -10% threshold (4.25V to 4.50V); high-impedance node |
| 2 (IN2) | +3.3V input | Monitors nominal +3.3V supply with -10% threshold (2.85V to 3.00V); compatible with LDO outputs |
| 3 (IN3) | Adjustable input | Accepts external resistor divider referenced to 1.23V internal bandgap; supports custom thresholds (e.g., 4.5V, 2.7V) |
| 4 (IN4) | -5.0V input | Monitors negative rail with +10% threshold (-4.5V to -4.25V); accepts -6V to +0.3V input range |
| 5 (GND) | Analog/digital ground | Common reference for all comparators and outputs; must be low-impedance connection |
| 6 (OUT4) | -5.0V fault indicator | Active-low open-drain output; pulls low when IN4 rises above -4.5V (i.e., -5V rail fails high) |
| 7 (OUT3) | Adjustable threshold fault indicator | Active-low open-drain output tied to IN3; asserts on undervoltage of user-defined rail |
| 8 (OUT2) | +3.3V fault indicator | Active-low open-drain output; asserts when IN2 drops below 2.85V - signals +3.3V rail collapse |
| 9 (OUT1) | +5.0V fault indicator | Active-low open-drain output; asserts when IN1 drops below 4.25V - used for primary power fail detection |
| 10 (VCC) | Supply input | +2.5V to +5.5V power pin; internal UVLO forces all outputs low if VCC < +2.5V |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four separate comparator channels with dedicated outputs eliminate need for discrete supervisors or FPGA logic |
| No external components required | Factory-trimmed thresholds and integrated 1.23V reference remove precision resistors and calibration steps |
| Wire-ORable open-drain outputs | Enables single "power good" signal generation across multiple rails using one external pull-up resistor |
| Guaranteed operation over -40°C to +85°C | Validated performance across full industrial temperature range without derating or thermal compensation |
| Low 25µA quiescent current | Reduces standby power in always-on supervisory circuits - critical for battery-buffered systems |
Applications
| Telecom Line Card Power Supervision | Industrial PLC I/O Module Monitoring |
|---|---|
|
Use Scenario: Monitoring +5V, +3.3V, -5V, and auxiliary 12V rails on a carrier-grade line card with hot-swap capability. IC Role / Device Role / Timing Role: Quad voltage supervisor providing independent fault flags for each rail, enabling precise power sequencing and graceful shutdown. Use Value: Eliminates risk of latch-up or data corruption during partial power loss by asserting individual rail faults before system-level reset. |
Use Scenario: Supervising isolated +24V DC input, +5V logic, +3.3V MCU, and -5V analog bias in a programmable logic controller I/O module. IC Role / Device Role / Timing Role: Centralized voltage integrity checker feeding watchdog timer and status registers in the PLC main controller. Use Value: Reduces BOM count by replacing four discrete reset ICs while maintaining per-rail visibility for diagnostics and predictive maintenance. |
| Desktop Motherboard VRM Validation | Medical Imaging Power Subsystem |
|
Use Scenario: Verifying stability of core +5V, +3.3V, GPU +1.8V (via adjustable input), and legacy -5V bias on ATX motherboard after VRM startup. IC Role / Device Role / Timing Role: Post-regulator validation block ensuring all rails meet spec before releasing CPU reset and enabling PCIe enumeration. Use Value: Prevents boot failure due to marginal VRM output by detecting sub-threshold conditions with 20µs response time. |
Use Scenario: Monitoring dual +5V analog supplies, +3.3V digital core, and -5V op-amp bias in MRI front-end signal conditioning circuitry. IC Role / Device Role / Timing Role: Safety-critical power integrity monitor feeding fault interrupt to medical-grade microcontroller with ASIL-B compliance path. Use Value: Ensures no out-of-spec rail condition compromises image fidelity or triggers false alarms - meets IEC 62304 Class C software requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6340EUB+ | Triple monitor (+5V, +3.3V, +2.5V) with fixed -10% thresholds; no adjustable or negative rail support | Lacks IN4 (-5V) and IN3 (adjustable) channels - unsuitable for designs requiring negative or custom rail monitoring | Select only if system uses only three positive rails and does not require -5V or programmable thresholds |
| TPS3307-33DGNR | Triple voltage supervisor (+3.3V, +5V, adjustable) with push-pull outputs; no -5V input; higher 45µA ICC | Missing fourth channel and negative rail capability; push-pull outputs prevent wire-ORing without level-shifting | Choose when board space permits separate reset lines and -5V monitoring is unnecessary |
Compared with MAX6338OUB+, MAX6340EUB+ reduces channel count and eliminates negative/adjustable inputs, while TPS3307-33DGNR trades quad capability and open-drain flexibility for push-pull simplicity - making MAX6338OUB+ uniquely suited for multirail systems with mixed polarity and custom voltage requirements.
Availability
MAX6338OUB+ is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial PLCs, and medical imaging equipment requiring stable component supply and long-term lifecycle assurance.
Supply support for MAX6338OUB+ 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 high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX6338 family was engineered for compact, low-power multivoltage supervision in space-constrained systems - targeting telecom line cards, embedded controllers, and instrumentation where reliability and minimal external components are mandatory.
FAQ
What is the exact input voltage configuration for MAX6338OUB+?
The MAX6338OUB+ is factory-configured to monitor four specific rails: IN1 = +5.0V (-10% threshold), IN2 = +3.3V (-10% threshold), IN3 = adjustable (1.23V internal reference), and IN4 = -5.0V (+10% threshold). This configuration is defined in Maxim's Selector Guide under part number MAX6338OUB and confirmed in the 19-1695 Rev 2 datasheet.
Does MAX6338OUB+ support wire-OR connection of its outputs?
Yes, MAX6338OUB+ supports wire-ORing: all four outputs (OUT1–OUT4) are open-drain with weak 10µA internal pull-ups to VCC. They can be tied together with a single external pull-up resistor to generate a composite "power good" signal - a feature explicitly documented in the Pin Description and Applications Information sections.
What is the minimum VCC voltage that keeps MAX6338OUB+ functional?
MAX6338OUB+ requires VCC ≥ +2.5V to operate. Below this, the internal undervoltage lockout circuit forces all outputs low regardless of input conditions. The device remains functional down to VCC = +1V for output forcing, but valid monitoring only occurs within the +2.5V to +5.5V specified range.
Can the adjustable input (IN3) of MAX6338OUB+ monitor voltages above +5.5V?
No. While IN3 accepts a resistor divider to set custom thresholds, the absolute maximum voltage at any input pin (except IN4) is +6V relative to GND. For rails exceeding +5.5V, external attenuation or clamping is required - the MAX6338OUB+ itself does not support direct high-voltage monitoring beyond its absolute ratings.
Is MAX6338OUB+ pin-compatible with other MAX6338 variants like MAX6338JUB+?
No. All MAX6338 variants share the same 10-pin µMAX package and pinout, but MAX6338OUB+ and MAX6338JUB+ differ in factory-programmed thresholds: OUB uses +5V/-10%, +3.3V/-10%, adjustable, -5V/+10%, while JUB uses +5V/-5%, +3.3V/-5%, +1.8V/-5%, +2.5V/-5%. Pin compatibility exists, but functional behavior differs per configuration.
MAX6338OUB+ 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:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 2.93V, 4.38V, Adj, -4.38V
- 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
MAX6338OUB+ FAQ
1.How can I place an order for MAX6338OUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6338OUB+ 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 MAX6338OUB+ reliable?
The price and inventory of MAX6338OUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6338OUB+ is usually 5 days.
3.What payment methods are accepted for MAX6338OUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6338OUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6338OUB+?
MAX6338OUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6338OUB+ 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 MAX6338OUB+?
For technical support, including MAX6338OUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6338OUB+ requirements.
6.How does Aetrix verify that MAX6338OUB+ is sourced from the original manufacturer or authorized distributors?
All MAX6338OUB+ 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 MAX6338OUB+ meets industry standards.
7.What is the process for return or replacement of MAX6338OUB+?
All MAX6338OUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6338OUB+, 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 MAX6338OUB+ part is unused and in its original packaging.
Return procedure for MAX6338OUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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