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Analog Devices Inc./Maxim Integrated MAX6338LUB+
- Part No.:
- MAX6338LUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6338LUB+.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,544
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Product details
Overview
MAX6338LUB+ from Maxim Integrated is a quad voltage monitor IC designed for multivoltage system supervision, featuring factory-programmed thresholds for IN2 = +3.3V (−5% tolerance), IN3 = +2.5V (−5% tolerance), and adjustable thresholds on IN1 and IN4 (based on 1.23V internal reference). It delivers four independent open-drain active-low outputs, consumes only 25µA typical supply current, operates from +2.5V to +5.5V, and is rated for −40°C to +85°C. It is used in desktop/notebook computers for real-time power-rail validation.
For engineers reviewing the MAX6338LUB+ datasheet, MAX6338LUB+ pinout, MAX6338LUB+ application, or MAX6338LUB+ equivalent, key selection considerations include its dual adjustable inputs, guaranteed −5% trip accuracy on +3.3V/+2.5V rails, wire-ORable open-drain outputs, µMAX package footprint, and absence of external components for basic operation.
Technical Context
The MAX6338LUB+ integrates four comparators sharing a precision 1.23V bandgap reference; IN2 and IN3 are connected to internal resistor dividers set for +3.3V and +2.5V nominal inputs with −5% trip points (3.08V and 2.19V respectively), while IN1 and IN4 are auxiliary inputs tied directly to comparator noninverting terminals for user-defined thresholds. Each comparator drives an open-drain output with 10µA weak internal pull-up to VCC.
It includes undervoltage lockout (UVLO) that forces all outputs low when VCC drops below +2.5V, and built-in 0.3% threshold hysteresis eliminates need for external feedback networks. Propagation delay is 20µs with 100mV overdrive, and input leakage is ±0.1µA for adjustable inputs and −20µA for −5V-capable variants (not applicable here).
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 level-shifting. |
| Supply Current (typ) | 25µA at +5V - enables always-on monitoring in battery-backed or low-power systems. |
| IN2 Threshold | +3.3V nominal, −5% trip = 3.08V - matches standard +3.3V supply tolerance spec for reliable brownout detection. |
| IN3 Threshold | +2.5V nominal, −5% trip = 2.19V - aligns with common +2.5V rail tolerance, ensuring accurate fault signaling. |
| Adjustable Input Reference | 1.23V internal bandgap - allows precise user-defined thresholds via external resistor divider on IN1/IN4. |
| Output Type | Four open-drain, active-low outputs with 10µA internal pull-up - enables wire-ORing into single "power good" signal without external logic. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and computing environments without derating. |
Pinout & Package
The MAX6338LUB+ is housed in a 10-pin µMAX® package (3.0mm × 3.0mm, 0.6mm pitch), compatible with space-constrained PCB layouts and reflow assembly. Its exposed pad is not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1) | Auxiliary input | User-adjustable threshold input; connects directly to comparator noninverting terminal for custom voltage monitoring. |
| 2 (IN2) | Fixed +3.3V monitor input | Factory-set for −5% trip at 3.08V; no external components needed for standard +3.3V rail supervision. |
| 3 (IN3) | Fixed +2.5V monitor input | Factory-set for −5% trip at 2.19V; provides accurate detection of +2.5V supply faults. |
| 4 (IN4) | Auxiliary input | Second user-adjustable input; supports independent threshold setting for additional rail or window detection. |
| 5 (GND) | Analog/digital ground | Common reference for all comparators and internal bandgap; must be low-impedance for stable threshold accuracy. |
| 6 (OUT4) | Active-low open-drain output | Asserts low when IN4 falls below its threshold; pulled up internally to VCC (10µA), enabling wire-OR with other outputs. |
| 7 (OUT3) | Active-low open-drain output | Asserts low when IN3 falls below 2.19V; synchronized timing with other outputs ensures coherent system reset sequencing. |
| 8 (OUT2) | Active-low open-drain output | Asserts low when IN2 falls below 3.08V; shares same propagation delay (20µs) and noise immunity as other outputs. |
| 9 (OUT1) | Active-low open-drain output | Asserts low when IN1 falls below user-defined threshold; identical drive strength and UVLO behavior as OUT2–OUT4. |
| 10 (VCC) | Positive supply input | +2.5V to +5.5V power source; internal UVLO holds all outputs low if VCC drops below +2.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual adjustable voltage inputs (IN1, IN4) | Enables monitoring of nonstandard rails (e.g., +1.2V, +4.2V) or implementation of window detectors using external resistive dividers. |
| +3.3V/−5% and +2.5V/−5% fixed thresholds | Guarantees precise brownout detection aligned with JEDEC-compliant power supply specs without calibration or trimming. |
| 25µA typical supply current | Reduces standby power impact in always-on supervisory circuits-critical for fanless PCs and embedded controllers. |
| Open-drain outputs with 10µA internal pull-ups | Eliminates need for external pull-up resistors in most configurations and supports flexible logic interfacing (e.g., to 3.3V or 5V microcontrollers). |
| Built-in 0.3% hysteresis | Prevents output oscillation near threshold without external feedback components-simplifies layout and improves noise immunity. |
Applications
| Desktop & Notebook Computers | Telecommunications Equipment |
|---|---|
Use Scenario: Real-time validation of multiple core voltage rails (+3.3V, +2.5V, CPU I/O, memory interface) during boot and runtime. IC Role / Device Role / Timing Role: Quad voltage supervisor providing independent, active-low fault signals for each monitored rail to host processor or CPLD. Use Value: Enables deterministic power sequencing and early fault isolation before system initialization completes, reducing boot failure rates. | Use Scenario: Monitoring redundant +3.3V and +2.5V bias supplies in line cards and optical modules where reliability is mission-critical. IC Role / Device Role / Timing Role: Fault detector feeding watchdog logic or hot-swap controller to trigger graceful shutdown upon rail collapse. Use Value: Prevents cascading failures by isolating faulty power domains within <20µs propagation delay, meeting telecom NEBS Level 3 requirements. |
| Industrial Data Acquisition Systems | High-End Printers |
Use Scenario: Supervising isolated analog front-end supplies (+2.5V reference, +3.3V ADC/DAC logic) in harsh EMI environments. IC Role / Device Role / Timing Role: Precision rail monitor with internal bandgap reference and hysteresis, rejecting conducted noise on supply lines. Use Value: Maintains measurement integrity by asserting fault before ADC reference drift exceeds 0.1%, avoiding corrupted data capture. | Use Scenario: Coordinating power-up sequence of printhead drivers (+2.5V), logic (+3.3V), and motor control rails in multifunction printers. IC Role / Device Role / Timing Role: Sequencing enabler using wire-ORed outputs to generate unified "all-rails-good" signal for main controller enable. Use Value: Eliminates discrete OR-gate logic and reduces BOM count by 3–5 components per board, improving MTBF. |
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-channel 3.3V supervisor (−5%) with push-pull output; no adjustable inputs or multi-rail capability. | Suitable only for monitoring one rail; requires three additional devices to match MAX6338LUB+ functionality. | Select only when supervising a single critical +3.3V rail and board space permits discrete solutions. |
| ADM6315-33D2ARTZ-RL | Single-channel +3.3V supervisor with watchdog timer and manual reset; no multi-input or adjustable capability. | Lacks IN3/IN1/IN4 monitoring; cannot replace quad supervision without redesigning fault-signaling architecture. | Choose when system-level reset coordination and watchdog timeout are required alongside basic +3.3V monitoring. |
Compared with TLV809E33DBZR and ADM6315-33D2ARTZ-RL, the MAX6338LUB+ uniquely integrates four independently configurable monitors-including two fixed-accuracy +3.3V/+2.5V channels and two user-adjustable inputs-in a single µMAX package, eliminating inter-device timing skew and reducing PCB area by >60% versus discrete alternatives.
Availability
MAX6338LUB+ is available at Aetrix Electronics and suitable for desktop/notebook computers, telecommunications infrastructure, and industrial data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6338LUB+ 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 MAX6338 family was designed specifically for multivoltage system supervision in space-constrained, low-power computing and telecom platforms-emphasizing accuracy, integration, and ease of use without external passive components.
FAQ
What voltage thresholds are factory-programmed in the MAX6338LUB+?
The MAX6338LUB+ has IN2 configured for +3.3V with −5% trip threshold (3.08V) and IN3 for +2.5V with −5% trip threshold (2.19V). IN1 and IN4 are auxiliary inputs with no factory trim-each accepts user-defined thresholds via external resistor dividers referenced to the internal 1.23V bandgap. This configuration is confirmed in the Selector Guide table for MAX6338LUB.
Does the MAX6338LUB+ require external components for basic operation?
No, the MAX6338LUB+ requires no external components to monitor its factory-programmed +3.3V and +2.5V rails. Only IN1 and IN4-being adjustable inputs-need external resistor dividers to set custom thresholds. A 0.1µF bypass capacitor on VCC is recommended for noisy environments but not strictly required for functional operation.
How does the undervoltage lockout (UVLO) function in the MAX6338LUB+?
The MAX6338LUB+ UVLO circuit forces all four outputs low whenever VCC drops below +2.5V, regardless of input voltages. This ensures clean, predictable fault signaling during power ramp-down or brownout events. The UVLO remains active down to VCC = +1V, and outputs stay asserted low until VCC rises above +2.5V and stabilizes.
Can the outputs of the MAX6338LUB+ be wire-ORed together?
Yes, all four outputs of the MAX6338LUB+ are open-drain with weak 10µA internal pull-ups to VCC, making them inherently wire-ORable. Connecting them to a common node creates a single "power good" signal that goes low if any monitored rail fails-no external diodes or logic gates are needed.
What is the propagation delay and hysteresis specification for the MAX6338LUB+?
The MAX6338LUB+ has a typical propagation delay of 20µs when driven with 100mV overdrive, and built-in hysteresis of 0.3% of the threshold voltage. This hysteresis is internal and fixed-no external components are required to prevent chatter near trip points, unlike discrete comparator solutions.
MAX6338LUB+ 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:
- 2.19V, 3.08V, 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
MAX6338LUB+ FAQ
1.How can I place an order for MAX6338LUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6338LUB+ 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 MAX6338LUB+ reliable?
The price and inventory of MAX6338LUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6338LUB+ is usually 5 days.
3.What payment methods are accepted for MAX6338LUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6338LUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6338LUB+?
MAX6338LUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6338LUB+ 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 MAX6338LUB+?
For technical support, including MAX6338LUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6338LUB+ requirements.
6.How does Aetrix verify that MAX6338LUB+ is sourced from the original manufacturer or authorized distributors?
All MAX6338LUB+ 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 MAX6338LUB+ meets industry standards.
7.What is the process for return or replacement of MAX6338LUB+?
All MAX6338LUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6338LUB+, 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 MAX6338LUB+ part is unused and in its original packaging.
Return procedure for MAX6338LUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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