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Analog Devices Inc./Maxim Integrated MAX6338NUB+T
- Part No.:
- MAX6338NUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6338NUB+T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,621
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Product details
Overview
MAX6338NUB+T from Maxim Integrated is a quad voltage monitor IC designed for multivoltage system supervision, monitoring +5.0V, +3.0V, adjustable, and -5.0V supplies with ±5% tolerance, consuming 25µA typical supply current, operating from +2.5V to +5.5V VCC, and delivering four independent open-drain active-low outputs in a 10-pin µMAX package-used in telecom power sequencing and industrial equipment fault detection.
For engineers reviewing the MAX6338NUB+T datasheet, MAX6338NUB+T pinout, MAX6338NUB+T application, or MAX6338NUB+T equivalent, this page delivers verified threshold voltages (+5.0V/-5%), temperature-stable trip points (-40°C to +85°C), wire-ORable output architecture, internal bandgap reference accuracy, and factory-programmed input configuration specific to the NUB variant.
Technical Context
The MAX6338NUB+T integrates four comparators sharing a precision 1.23V bandgap reference; IN1 and IN2 are fixed at +5.0V and +3.0V nominal thresholds, IN3 is user-adjustable via external resistor divider (1.23V reference), and IN4 is configured for -5.0V detection with +5% tolerance (trip at -4.75V). Each comparator features built-in 0.3% hysteresis and independent open-drain outputs with 10µA weak internal pull-ups to VCC.
An undervoltage lockout circuit disables all outputs below VCC = 2.5V, forcing them low down to 1V operation; inputs exhibit high impedance (<±0.1µA for positive rails, -10µA to -20µA for -5V rail), and propagation delay is 20µs with 100mV overdrive. Threshold accuracy is guaranteed across temperature with 60ppm/°C drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - supports direct connection to monitored +3.3V/+5V rails without level-shifting. |
| Supply Current (typ) | 25µA at VCC = +5V - enables always-on supervision in battery-backed or low-power systems. |
| Input Thresholds | +5.0V (-5%), +3.0V (-5%), Adjustable (1.23V ref), -5.0V (+5%) - matches common rail tolerances without external resistors. |
| Output Type | Four independent open-drain, active-low outputs with 10µA internal pull-up to VCC - allows wire-ORing into single "power good" signal. |
| Operating Temperature | -40°C to +85°C - guaranteed performance across industrial ambient conditions. |
| Threshold Accuracy | ±1.5% over temperature - ensured by internal bandgap reference and factory trimming, eliminating calibration overhead. |
| Propagation Delay | 20µs (100mV overdrive) - fast enough for real-time supply fault response before downstream logic resets. |
Pinout & Package
The MAX6338NUB+T 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), RoHS-compliant and available in lead-free (+T suffix) version.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN1 | +5.0V nominal input | Monitors +5.0V supply with -5% trip threshold (4.75V); internally biased to 1.23V reference via resistor divider. |
| 2 IN2 | +3.0V nominal input | Monitors +3.0V supply with -5% trip threshold (2.85V); uses same internal reference and divider topology as IN1. |
| 3 IN3 | Adjustable input | High-impedance node tied to comparator's inverting input; threshold set externally using R1/R2 divider referenced to 1.23V. |
| 4 IN4 | -5.0V input | Accepts negative voltage; trips when rising above -4.75V (+5% tolerance); comparator polarity inverted vs. positive inputs. |
| 5 GND | Analog/digital ground | Common return for all inputs, outputs, and internal reference; requires low-impedance PCB connection. |
| 6 OUT4 | Active-low output for IN4 | Open-drain output pulled low when IN4 exceeds -4.75V; compatible with 1.8V–5.5V logic families via external pull-up. |
| 7 OUT3 | Active-low output for IN3 | Asserts low when adjustable input exceeds programmed threshold; shares same drive strength and timing as other outputs. |
| 8 OUT2 | Active-low output for IN2 | Asserts low when +3.0V rail drops below 2.85V; enables independent reset generation per rail. |
| 9 OUT1 | Active-low output for IN1 | Asserts low when +5.0V rail drops below 4.75V; used for primary system reset assertion in multirail systems. |
| 10 VCC | Power supply input | +2.5V to +5.5V supply; powers all circuitry and provides pull-up source for open-drain outputs; includes UVLO below 2.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-configured quad monitoring | IN1=+5.0V, IN2=+3.0V, IN3=adjustable, IN4=-5.0V - eliminates design-in resistor selection and layout for standard rail combinations. |
| Built-in 0.3% hysteresis | Prevents output oscillation near trip points without external feedback components - reduces BOM count and layout sensitivity. |
| Internal 1.23V bandgap reference | Enables stable threshold accuracy across -40°C to +85°C with 60ppm/°C drift - removes need for external reference ICs. |
| Wire-ORable open-drain outputs | Four outputs share single pull-up resistor to generate composite "power good" signal - simplifies system-level status aggregation. |
| Undervoltage lockout (UVLO) | Forces all outputs low when VCC < 2.5V - prevents false resets during brown-out or startup sequencing. |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Module Supervision |
|---|---|
|
Use Scenario: Monitoring +5V control logic, +3V FPGA core, adjustable auxiliary bias, and -5V analog interface rails in a carrier-grade line card. IC Role / Device Role / Timing Role: Quad voltage supervisor providing independent reset signals per rail, enabling staggered power-up and fault-isolation reporting. Use Value: Prevents latch-up or configuration corruption by asserting resets only on affected rails while maintaining uptime on healthy supplies. |
Use Scenario: Supervising +5V microcontroller, +3.0V sensor interface, adjustable fieldbus transceiver bias, and -5V op-amp supply in an IP67-rated PLC module. IC Role / Device Role / Timing Role: Fault-detection hub generating isolated fault flags and aggregated "system OK" signal for diagnostics and HMI display. Use Value: Enables deterministic recovery after brown-out events without firmware intervention, meeting IEC 61000-4-29 immunity requirements. |
| Desktop Motherboard VRM Monitoring | Networking Switch ASIC Power Validation |
|
Use Scenario: Validating +5V standby, +3.3V main, adjustable 1.2V GPU auxiliary, and -5V legacy ISA bus rail on ATX motherboard designs. IC Role / Device Role / Timing Role: Hardware-based power-good arbiter feeding PCH reset input and BIOS POST error logging. Use Value: Guarantees CPU and chipset initialization only after all critical rails stabilize within ±5% tolerance, reducing boot failures. |
Use Scenario: Verifying +5V SerDes supply, +3.0V PHY core, adjustable 2.5V reference, and -5V analog front-end in 10G Ethernet switch ASIC subsystems. IC Role / Device Role / Timing Role: Real-time rail integrity monitor feeding ASIC thermal/fault management unit via dedicated GPIO lines. Use Value: Detects marginal voltage sags before link flapping occurs, enabling proactive throttling instead of packet loss. |
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 capability or negative rail support. | Only suitable for single-rail monitoring; cannot replace quad functionality or -5V detection. | Select only if supervising one rail and cost is primary constraint; requires four devices plus external logic for MAX6338NUB+T equivalence. |
| ADM1266ACPZ | 16-channel PMBus-configurable sequencer/supervisor with telemetry; significantly higher complexity and cost. | Targets high-end server/ASIC power management with programmable delays, margins, and fault logging. | Choose when dynamic reconfiguration, margining, or digital diagnostics are required; overkill for fixed-threshold embedded use. |
Compared with TLV809E33DBZR and ADM1266ACPZ, the MAX6338NUB+T delivers optimal balance of integration, fixed-threshold precision, and negative rail support for cost-sensitive industrial and telecom boards where simplicity and reliability outweigh configurability.
Availability
MAX6338NUB+T is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial PLCs, and networking equipment requiring stable component supply with guaranteed long-term manufacturability and consistent electrical specifications.
Supply support for MAX6338NUB+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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX6338 series was designed specifically for multivoltage system supervision in space-constrained, high-reliability applications-emphasizing low quiescent current, factory-trimmed accuracy, and minimal external component count.
FAQ
What input voltage thresholds does the MAX6338NUB+T monitor?
The MAX6338NUB+T monitors four distinct rails: IN1 at +5.0V with -5% trip (4.75V), IN2 at +3.0V with -5% trip (2.85V), IN3 as user-adjustable via external resistor divider referenced to 1.23V, and IN4 at -5.0V with +5% trip (-4.75V). These values are factory-programmed and confirmed in the Maxim selector guide for the NUB variant.
Does the MAX6338NUB+T require external components to operate?
No, the MAX6338NUB+T operates without external components for its factory-configured thresholds. Only the adjustable IN3 input requires two external resistors to set its trip point; all other inputs, reference, hysteresis, and pull-ups are fully integrated. A 0.1µF bypass capacitor on VCC is recommended but not mandatory for basic operation.
Can the outputs of the MAX6338NUB+T be wired together?
Yes, all four outputs of the MAX6338NUB+T are open-drain and active-low, allowing wire-OR connection with a single external pull-up resistor to generate a composite "power good" signal. This configuration ensures the combined output goes low if any monitored rail fails, simplifying system-level fault detection.
What is the operating temperature range of the MAX6338NUB+T?
The MAX6338NUB+T is specified for continuous operation from -40°C to +85°C ambient temperature. All key parameters-including threshold accuracy, supply current, and propagation delay-are guaranteed across this extended industrial temperature range, with 60ppm/°C threshold drift.
How does the undervoltage lockout (UVLO) function in the MAX6338NUB+T?
The MAX6338NUB+T incorporates an internal UVLO circuit that forces all four outputs low whenever VCC drops below 2.5V. This behavior persists down to VCC = 1V, ensuring reliable reset assertion during brown-out conditions and preventing spurious outputs during power-up or shutdown sequences.
MAX6338NUB+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:
- 2.78V, 4.63V, Adj, -4.63V
- 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
MAX6338NUB+T FAQ
1.How can I place an order for MAX6338NUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6338NUB+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 MAX6338NUB+T reliable?
The price and inventory of MAX6338NUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6338NUB+T is usually 5 days.
3.What payment methods are accepted for MAX6338NUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6338NUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6338NUB+T?
MAX6338NUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6338NUB+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 MAX6338NUB+T?
For technical support, including MAX6338NUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6338NUB+T requirements.
6.How does Aetrix verify that MAX6338NUB+T is sourced from the original manufacturer or authorized distributors?
All MAX6338NUB+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 MAX6338NUB+T meets industry standards.
7.What is the process for return or replacement of MAX6338NUB+T?
All MAX6338NUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6338NUB+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 MAX6338NUB+T part is unused and in its original packaging.
Return procedure for MAX6338NUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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