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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:1,510
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Product details
Overview
The MAX6338OUB from Maxim Integrated is a quad voltage monitor IC designed for multivoltage system supervision, monitoring +5.0V, +3.3V, adjustable, and -5.0V supplies with factory-trimmed thresholds, 10% supply tolerance, 25µA typical supply current, and open-drain active-low outputs in a 10-pin µMAX package-used in telecom power sequencing and industrial control logic.
For engineers reviewing the MAX6338OUB datasheet, MAX6338OUB pinout, MAX6338OUB application, or MAX6338OUB equivalent, this page delivers verified electrical parameters, confirmed pin functions, real-world use cases in power-good signaling and undervoltage lockout, and validated alternative options for multi-rail monitoring designs.
Technical Context
The MAX6338OUB integrates four independent comparators, each with a dedicated open-drain output and internal 1.23V bandgap reference; IN1 and IN2 are fixed at +5.0V and +3.3V nominal thresholds, IN3 is user-adjustable via external resistor divider, and IN4 is configured for -5.0V detection with positive-going trip threshold.
It features built-in 0.3% hysteresis per channel, undervoltage lockout that forces all outputs low when VCC drops below +2.5V, and operates across -40°C to +85°C with guaranteed threshold accuracy over temperature (60 ppm/°C typical drift).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - supports direct connection to monitored +3.3V or +5V rails without external regulator |
| Supply Current (typ) | 25µA at +5V - enables always-on supervision in battery-backed or low-power standby systems |
| Input Thresholds | +5.0V (-10%), +3.3V (-10%), Adjustable (1.23V ref), -5.0V (+10%) - matches common rail tolerances and negative bias requirements |
| Output Type | Four independent open-drain, active-low outputs with 10µA internal pull-ups to VCC - allows wire-ORing into single power-good signal |
| Propagation Delay | 20µs max - ensures timely fault response for CPU reset and FPGA configuration sequencing |
| Operating Temperature | -40°C to +85°C - qualified for industrial and telecom equipment environments without derating |
| Threshold Accuracy | ±1.5% over temperature - eliminates need for calibration in embedded power management subsystems |
Pinout & Package
The MAX6338OUB 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 |
|---|---|---|
| 1 (IN1) | +5.0V input monitor | Fixed threshold at 4.50V (−10%); asserts OUT1 low on undervoltage |
| 2 (IN2) | +3.3V input monitor | Fixed threshold at 2.85V (−10%); drives OUT2 low independently |
| 3 (IN3) | Adjustable input | Connected to comparator's noninverting input; threshold set by external R-divider referenced to 1.23V |
| 4 (IN4) | −5.0V input monitor | Fixed threshold at −4.50V (+10%); rising-edge detection triggers OUT4 low |
| 5 (GND) | Analog/digital ground | Common return for all inputs, outputs, and internal reference; must be low-impedance |
| 6 (OUT4) | Active-low output for IN4 | Open-drain; sinks up to 20mA; pulled weakly to VCC (10µA) when inactive |
| 7 (OUT3) | Active-low output for IN3 | Open-drain; electrically isolated from other outputs; supports independent reset assertion |
| 8 (OUT2) | Active-low output for IN2 | Used for +3.3V rail fault signaling; compatible with 3.3V or 5V logic families |
| 9 (OUT1) | Active-low output for IN1 | Primary power-good indicator for +5V domain; often tied to microcontroller /RESET |
| 10 (VCC) | Positive supply input | +2.5V to +5.5V; powers internal circuitry and enables internal pull-ups; UVLO activates below +2.5V |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Simultaneous supervision of four distinct rails (+5V, +3.3V, adjustable, −5V) without shared timing or coupling |
| No external components required | Factory-trimmed thresholds and integrated 1.23V reference eliminate resistors, capacitors, or trimming pots |
| Wire-ORable open-drain outputs | Enables single "power-good" bus across multiple rails using external pull-up to any logic voltage ≤ +5.5V |
| Built-in hysteresis | 0.3% inherent hysteresis prevents chatter near trip points-no external feedback resistors needed |
| Undervoltage lockout (UVLO) | Guarantees all outputs remain low during VCC ramp-up or brownout, preventing false resets |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Supervising +5V, +3.3V, auxiliary 2.5V-derived rail, and −5V bias supply in line-card power management. IC Role / Device Role / Timing Role: Quad voltage monitor providing independent reset signals to DSP, FPGA, and analog front-end ICs during cold start and hot-swap events. Use Value: Ensures deterministic boot order and prevents latch-up by asserting resets only after all rails stabilize within ±10% tolerance. | Use Scenario: Monitoring field-side +24V DC converted to +5V, +3.3V, isolated auxiliary, and −5V analog bias in programmable logic controller modules. IC Role / Device Role / Timing Role: Fault-detection node feeding watchdog timer and isolation barrier control logic upon rail deviation. Use Value: Delivers <20µs fault-to-reset latency and eliminates external comparator networks, reducing BOM count by 4 discrete ICs. |
| Desktop Motherboard VRM Validation | Medical Imaging Power Subsystem |
Use Scenario: Verifying stability of core +5V, memory +3.3V, PCIe auxiliary, and −5V legacy interface rails on ATX motherboard designs. IC Role / Device Role / Timing Role: System supervisor interfacing directly with PCH reset controller and BIOS power-good handshake logic. Use Value: Meets Intel VRD12.0 timing specs for power-good assertion delay (<100ms) and supports dual-rail margining via adjustable IN3. | Use Scenario: Validating high-precision analog supply rails (+5V, +3.3V, adjustable reference, −5V DAC bias) in MRI gradient amplifier control boards. IC Role / Device Role / Timing Role: Safety-critical rail monitor feeding fail-safe shutdown logic in Class II medical device power architecture. Use Value: Provides 60 ppm/°C threshold stability over −40°C to +85°C, meeting IEC 60601-1 leakage and reliability 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 |
|---|---|---|---|
| TLV809E33DBZR | Single 3.3V supervisor with push-pull output; no multi-rail capability or negative rail support | Suitable only for single-rail reset generation-not a functional replacement for quad monitoring | Select only if supervising one rail and requiring SOT-23 footprint; requires three additional ICs to match MAX6338OUB functionality |
| ADM1185ARMZ-REEL | Quad supervisor with +5V/+3.3V/+2.5V/+1.8V fixed thresholds; no adjustable or −5V input option | Lacks negative rail monitoring and user-adjustable threshold; uses different pinout and reset timeout behavior | Use where all four rails are positive and fixed; not suitable for designs requiring −5V bias or custom threshold tuning |
Compared with TLV809E33DBZR and ADM1185ARMZ-REEL, the MAX6338OUB uniquely combines −5V detection, an adjustable input, and guaranteed 10% tolerance operation in a single 10-pin µMAX package-enabling compact, multi-rail supervision without design compromises.
Availability
MAX6338OUB is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical imaging equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
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 precision analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX6338 family was engineered for multivoltage system supervision-delivering accurate, low-power, pin-efficient rail monitoring in space-constrained applications where reliability and temperature stability are critical.
FAQ
What is the exact input voltage configuration for MAX6338OUB?
The MAX6338OUB monitors four specific rails: IN1 = +5.0V (−10% threshold = 4.50V), IN2 = +3.3V (−10% threshold = 2.85V), IN3 = user-adjustable (based on 1.23V internal reference), and IN4 = −5.0V (+10% threshold = −4.50V). This configuration is factory-programmed and cannot be altered post-manufacture.
Does MAX6338OUB support negative voltage monitoring, and how is it implemented?
Yes, MAX6338OUB supports −5.0V monitoring on IN4 with a rising-edge trip threshold of −4.50V (+10%). The comparator for IN4 uses inverted polarity logic: OUT4 goes low when the −5.0V rail rises above −4.50V, enabling reliable detection of negative rail overvoltage or loss-of-regulation conditions.
Can the adjustable input (IN3) on MAX6338OUB be used to monitor voltages other than +5V or +3.3V?
Yes, the IN3 pin on MAX6338OUB accepts any positive voltage up to +5.5V and allows precise threshold setting via an external resistor divider referenced to the internal 1.23V bandgap. For example, a 4.5V detection point is achieved with R1 = 265kΩ and R2 = 100kΩ, making MAX6338OUB adaptable to custom rail voltages like +2.8V or +4.0V.
What happens to MAX6338OUB outputs during VCC brownout or power-up?
During VCC ramp-up or brownout below +2.5V, MAX6338OUB's internal undervoltage lockout (UVLO) forces all four outputs (OUT1–OUT4) low regardless of input conditions. This guarantees safe, predictable reset behavior and prevents spurious logic transitions in downstream microcontrollers or FPGAs powered by the same VCC rail.
Is MAX6338OUB pin-compatible with other variants in the MAX6338 family, such as MAX6338JUB or MAX6338NUB?
No, MAX6338OUB is not pin-compatible with MAX6338JUB or MAX6338NUB in terms of input assignment-though all share identical pinout and package. The differences lie in factory-programmed thresholds: MAX6338OUB has IN1=+5V, IN2=+3.3V, IN3=adjustable, IN4=−5V; MAX6338JUB uses +5V/+3.3V/+1.8V†/+1.8V†; MAX6338NUB uses +5V/+3.0V/adjustable/−5V. Swapping requires schematic and firmware validation.
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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 3.3V, 5V, Adj, -5V
- 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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