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Analog Devices Inc./Maxim Integrated MAX6338MUB+T
- Part No.:
- MAX6338MUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6338MUB+T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,958
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Product details
Overview
MAX6338MUB+T from Maxim Integrated is a quad voltage monitor IC designed for multivoltage system supervision, monitoring +5.0V, +3.0V, adjustable (via resistor divider), and -5.0V supplies with factory-trimmed 10% tolerance thresholds. It features four independent open-drain active-low outputs, consumes only 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 logic.
For engineers reviewing the MAX6338MUB+T datasheet, MAX6338MUB+T pinout, MAX6338MUB+T application, or MAX6338MUB+T equivalent, key selection criteria include its fixed +5.0V/+3.0V/-5.0V input configuration, adjustable fourth channel referenced to 1.23V internal bandgap, wire-ORable outputs, undervoltage lockout below 2.5V, and µMAX package compatibility with high-density PCB layouts.
Technical Context
The MAX6338MUB+T integrates four comparators sharing a precision 1.23V bandgap reference; IN1 and IN2 are preset to +5.0V and +3.0V nominal thresholds, IN4 is configured for -5.0V detection (rising-edge trip), and IN3 is auxiliary (adjustable) with direct access to the comparator's noninverting input. Hysteresis is built-in at 0.3%, eliminating external feedback networks.
All outputs are open-drain with 10µA internal pull-ups to VCC, enabling wire-OR connection without external components. An internal undervoltage lockout forces all outputs low when VCC drops below 2.5V, ensuring reliable reset behavior during brownout conditions - critical for embedded system reliability in telecom and industrial equipment.
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 supervision in battery-backed or low-power systems. |
| +5.0V Threshold (10%) | 4.25V to 4.50V - triggers OUT1 low when +5V rail drops below 4.25V, meeting standard 5%–10% supply tolerance specs. |
| +3.0V Threshold (10%) | 2.55V to 2.70V - ensures robust detection of +3.0V rail collapse before downstream logic fails. |
| -5.0V Threshold (10%) | -4.50V to -4.25V - rising-edge detection on IN4 provides accurate negative supply fault signaling. |
| Adjustable Threshold | 1.20V to 1.26V (ref) - allows user-defined trip point via external resistor divider, e.g., 4.5V detection using R1/R2 network. |
| Propagation Delay | 20µs - ensures fast response to supply faults while avoiding noise-induced false trips. |
Pinout & Package
The MAX6338MUB+T is housed in a 10-pin µMAX® package (3.0mm × 3.0mm, 0.6mm height), compatible with fine-pitch surface-mount assembly and thermal constraints of compact telecom modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1) | +5.0V Monitor Input | Factory-configured for 5V nominal supply; trips low on OUT1 when voltage falls below 4.25V (10% tol). |
| 2 (IN2) | +3.0V Monitor Input | Factory-configured for 3V nominal supply; drives OUT2 low at 2.55V threshold under 10% tolerance. |
| 3 (IN3) | Auxiliary Adjustable Input | Direct access to comparator noninverting input; sets custom threshold using external resistor divider referenced to 1.23V. |
| 4 (IN4) | -5.0V Monitor Input | Configured for negative supply detection; OUT4 goes low when -5V rises above -4.50V (10% positive deviation). |
| 5 (GND) | Analog/Digital Ground | Common reference for all comparators and outputs; must be low-impedance for stable threshold accuracy. |
| 6 (OUT4) | Open-Drain Output | Active-low signal for IN4 fault; internally pulled up to VCC (10µA), supports wire-OR with other outputs. |
| 7 (OUT3) | Open-Drain Output | Active-low signal for IN3 fault; shares same electrical characteristics as OUT1–OUT4 for unified "power good" bus design. |
| 8 (OUT2) | Open-Drain Output | Active-low signal for IN2 fault; compatible with 1.8V/3.3V logic families due to VCC-referenced pull-up. |
| 9 (OUT1) | Open-Drain Output | Active-low signal for IN1 fault; enables single-point reset generation when combined with external pull-up. |
| 10 (VCC) | Power Supply Input | +2.5V to +5.5V supply; powers internal circuitry and enables internal pull-ups; UVLO activates below 2.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Quad Monitoring Without External Components | Four factory-programmed thresholds (+5V, +3V, -5V, adjustable) eliminate need for external resistors or references - reduces BOM count and layout area. |
| Built-in 0.3% Hysteresis | Prevents output oscillation near trip points without external feedback - improves noise immunity in electrically noisy telecom environments. |
| 10µA Internal Pull-Up Current | Enables direct interface with 3.3V/5V logic while allowing overdrive by stronger external pull-ups up to +5.5V - simplifies mixed-voltage system integration. |
| Undervoltage Lockout (UVLO) | Forces all outputs low when VCC < 2.5V - ensures deterministic reset state during power ramp-up or brownout, critical for FPGA/CPU initialization. |
| Guaranteed Operation from -40°C to +85°C | Validated across full industrial temperature range - supports deployment in uncontrolled environments like base station cabinets or industrial controllers. |
Applications
| Telecom Power Sequencing | Industrial PLC Supervision |
|---|---|
Use Scenario: Monitoring multiple DC rails (+5V, +3V, -5V, and custom bias) in a line card power module where staggered startup and fault isolation are required. IC Role / Device Role / Timing Role: Quad voltage supervisor providing independent reset signals per rail, enabling sequenced enable/disable and precise fault logging. Use Value: Eliminates discrete comparator + reference solutions, reducing component count by ≥7 parts while maintaining ±1.5% threshold accuracy over temperature. | Use Scenario: Detecting supply faults in programmable logic controller I/O modules operating in harsh factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: System-level power integrity monitor triggering watchdog timeout or safe-state transition upon any rail failure. Use Value: Built-in UVLO and guaranteed -40°C to +85°C operation ensure reliable reset assertion even during cold-start or thermal stress events. |
| High-End Printer Logic Control | Data Storage Backplane Monitoring |
Use Scenario: Supervising dual-voltage logic (3.3V/1.8V) and analog bias (-5V) in laser print engine controllers where timing-critical motor sequencing depends on clean power. IC Role / Device Role / Timing Role: Fault-detection node feeding real-time status to microcontroller via wired-OR "any-fault" interrupt line. Use Value: 20µs propagation delay and 0.3% hysteresis prevent spurious resets during transient load switching on shared power planes. | Use Scenario: Monitoring redundant +5V and +3.3V supplies plus negative bias in SAS/SATA backplane controllers where hot-swap events cause rapid voltage transients. IC Role / Device Role / Timing Role: Independent rail monitor feeding fault flags to system management controller for predictive maintenance and graceful failover. Use Value: Adjustable IN3 channel allows dynamic reconfiguration for different drive voltage requirements without changing hardware. |
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 with manual reset; no multi-rail or negative voltage support. | Only monitors one rail; requires three additional devices to match MAX6338MUB+T's quad capability. | Select when cost-per-rail is prioritized over integration and space savings. |
| ADM1266ACPZ | 16-channel PMBus-configurable supervisor with sequencing, margining, and telemetry - significantly higher complexity and cost. | Targets high-end server/ASIC power domains; overkill for fixed-threshold industrial monitoring. | Select only when programmable sequencing, fault logging, or digital interface are mandatory. |
Compared with TLV809E33DBZR and ADM1266ACPZ, the MAX6338MUB+T delivers optimal balance of integration, fixed-threshold accuracy, and minimal external components for cost-sensitive, space-constrained multirail systems requiring +5V/+3V/-5V coverage.
Availability
MAX6338MUB+T is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial PLCs, high-end printers, and data storage equipment requiring stable component supply and long-term manufacturability.
Supply support for MAX6338MUB+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 semiconductor company specializing in analog and mixed-signal ICs for power, sensing, connectivity, and security applications.
The MAX6338 series belongs to Maxim's system-level supervision product line, engineered specifically for reliable, low-power, multi-rail voltage monitoring in space-constrained embedded systems without software overhead.
FAQ
What input voltages does the MAX6338MUB+T monitor?
The MAX6338MUB+T monitors four specific inputs: IN1 is factory-set to +5.0V (10% tolerance), IN2 to +3.0V (10%), IN4 to -5.0V (10% positive deviation), and IN3 is an auxiliary adjustable input referenced to the internal 1.23V bandgap - enabling custom trip points via external resistor divider. This exact configuration is unique to the MAX6338MUB+T variant.
Does the MAX6338MUB+T require external components for basic operation?
No, the MAX6338MUB+T requires no external components for monitoring its factory-programmed +5.0V, +3.0V, and -5.0V inputs. Only the adjustable IN3 channel needs two external resistors to set the desired threshold. A 0.1µF bypass capacitor on VCC is recommended but not mandatory for stable operation in low-noise environments.
How does the undervoltage lockout (UVLO) function in the MAX6338MUB+T?
The MAX6338MUB+T's internal UVLO circuit forces all four outputs low whenever VCC drops below 2.5V, regardless of input voltage states. This ensures deterministic reset behavior during power-up, brownout, or VCC sag - a critical feature for reliable microcontroller initialization. The UVLO threshold is fixed and not user-adjustable.
Can the outputs of the MAX6338MUB+T be wire-ORed together?
Yes, all four outputs of the MAX6338MUB+T are open-drain with weak 10µA internal pull-ups to VCC, making them inherently wire-ORable. Connecting them to a common pull-up resistor creates a single "power good" signal that goes low if any monitored supply fails - a widely adopted architecture in telecom and industrial power systems.
What is the temperature range guarantee for the MAX6338MUB+T?
The MAX6338MUB+T is fully specified and guaranteed to operate across -40°C to +85°C. All key parameters - including threshold accuracy (±1.5% over temp), supply current (25µA typ), and propagation delay (20µs) - are validated across this extended industrial temperature range, ensuring reliability in uncontrolled environments.
MAX6338MUB+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:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 2.63V, 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
MAX6338MUB+T FAQ
1.How can I place an order for MAX6338MUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6338MUB+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 MAX6338MUB+T reliable?
The price and inventory of MAX6338MUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6338MUB+T is usually 5 days.
3.What payment methods are accepted for MAX6338MUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6338MUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6338MUB+T?
MAX6338MUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6338MUB+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 MAX6338MUB+T?
For technical support, including MAX6338MUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6338MUB+T requirements.
6.How does Aetrix verify that MAX6338MUB+T is sourced from the original manufacturer or authorized distributors?
All MAX6338MUB+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 MAX6338MUB+T meets industry standards.
7.What is the process for return or replacement of MAX6338MUB+T?
All MAX6338MUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6338MUB+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 MAX6338MUB+T part is unused and in its original packaging.
Return procedure for MAX6338MUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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