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Analog Devices Inc./Maxim Integrated MAX6338OUB+T
- Part No.:
- MAX6338OUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6338OUB+T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,805
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Product details
Overview
MAX6338OUB+T 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% tolerance, 25µA supply current, and open-drain active-low outputs in a 10-pin µMAX package-used in telecom power sequencing and industrial embedded control.
For engineers reviewing the MAX6338OUB+T datasheet, MAX6338OUB+T pinout, MAX6338OUB+T application, or MAX6338OUB+T equivalent, key selection criteria include input voltage configuration (IN1=+5.0V, IN2=+3.3V, IN3=adjustable, IN4=-5.0V), guaranteed -40°C to +85°C operation, internal 1.23V bandgap reference, wire-ORable outputs, and undervoltage lockout below 2.5V.
Technical Context
The MAX6338OUB+T integrates four independent comparators, each with a dedicated open-drain output and factory-programmed threshold: IN1 monitors +5.0V at -10% (4.50V), IN2 monitors +3.3V at -10% (2.97V), IN3 uses the internal 1.23V reference with external resistor divider for user-adjustable trip point, and IN4 monitors -5.0V at +10% (-4.50V). All thresholds are referenced to an internal bandgap with 60ppm/°C tempco.
It employs undervoltage lockout (UVLO) that forces all outputs low when VCC drops below 2.5V, and features built-in 0.3% hysteresis per comparator-eliminating need for external feedback resistors. The 10µA internal pullups to VCC enable direct logic interfacing and wire-OR configuration without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - supports direct connection to monitored +3.3V or +5.0V rails without level-shifting. |
| Supply Current (typ) | 25µA at +5V - enables always-on supervision in battery-backed or low-power 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 open-drain, active-low outputs with 10µA internal pullups - allows flexible logic-level translation and wired-AND "power good" signaling. |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom equipment environments without derating. |
| Threshold Accuracy | ±1.5% over temp - ensures reliable detection margin against supply ripple and noise without external calibration. |
| Propagation Delay | 20µs max - provides deterministic response for real-time fault detection in digital systems. |
Pinout & Package
MAX6338OUB+T is housed in a 10-pin µMAX® package (3.0mm × 3.0mm, 0.6mm height, 0.5mm pitch), RoHS-compliant and available in lead-free version (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN1 | +5.0V supply input | Monitors nominal +5.0V rail at -10% trip (4.50V); high-impedance node requiring no external components. |
| 2 IN2 | +3.3V supply input | Monitors nominal +3.3V rail at -10% trip (2.97V); internally biased via precision resistor divider. |
| 3 IN3 | Adjustable voltage input | Connects to external resistor divider referencing internal 1.23V bandgap; sets custom trip point (e.g., 4.5V, 2.7V). |
| 4 IN4 | -5.0V supply input | Monitors negative rail at +10% trip (-4.50V); accepts -6V to +0.3V input range with dedicated comparator polarity. |
| 5 GND | Analog/digital ground | Common return for all inputs, outputs, and internal reference; must be low-impedance for threshold stability. |
| 6 OUT4 | Active-low output for IN4 | Open-drain output pulled low when IN4 rises above -4.50V; sinks ≥2mA at 0.4V VOL under 2mA load. |
| 7 OUT3 | Active-low output for IN3 | Open-drain output asserted when adjustable input exceeds set threshold; compatible with 1.8V–5.5V logic families. |
| 8 OUT2 | Active-low output for IN2 | Asserts when +3.3V rail drops below 2.97V; timing-critical path with 20µs max propagation delay. |
| 9 OUT1 | Active-low output for IN1 | Asserts when +5.0V rail drops below 4.50V; shares same electrical specs as other outputs for consistent system behavior. |
| 10 VCC | Positive supply input | +2.5V to +5.5V power source; UVLO circuit disables all outputs if VCC < 2.5V, ensuring valid state during brownout. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-configured quad monitoring | IN1=+5.0V, IN2=+3.3V, IN3=adjustable, IN4=-5.0V - eliminates design-in configuration effort for this specific variant. |
| Built-in 0.3% hysteresis | Prevents output oscillation near threshold without external resistors - improves noise immunity in noisy power environments. |
| Internal 1.23V bandgap reference | Stable reference with 60ppm/°C drift - enables accurate adjustable threshold setting across temperature without trimming. |
| Wire-ORable open-drain outputs | All four outputs share common pullup node - simplifies generation of single "system power good" signal with one external resistor. |
| Undervoltage lockout (UVLO) | Forces all outputs low when VCC < 2.5V - prevents false resets or undefined behavior during power-up/down sequences. |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring multiple isolated DC rails (+5V, +3.3V, -5V, and auxiliary bias) in line-card power management of optical transport equipment. IC Role / Device Role / Timing Role: Quad voltage supervisor providing independent reset assertion per rail failure, with precise -5V detection critical for analog interface stages. Use Value: Eliminates need for four discrete supervisors and external resistive dividers, reducing BOM count by 70% and PCB area by 45% vs. discrete solution. | Use Scenario: Supervising field-side power supplies (+5V logic, +3.3V MCU, adjustable sensor bias, -5V op-amp rail) in modular programmable logic controller backplanes. IC Role / Device Role / Timing Role: Centralized fault detector triggering watchdog timeout or safe-state transition upon any rail deviation beyond ±10%. Use Value: Guarantees deterministic 20µs fault-to-reset response across -40°C to +85°C, meeting IEC 61131-2 SIL-2 functional safety timing constraints. |
| Notebook Embedded Controller | Medical Imaging Power Subsystem |
Use Scenario: Real-time monitoring of core voltage rails (+5V main, +3.3V chipset, adjustable GPU VDDQ, -5V analog front-end) in laptop EC firmware. IC Role / Device Role / Timing Role: Hardware-enforced power-good validation before enabling CPU clock and memory initialization sequences. Use Value: Internal 10µA pullups allow direct connection to 3.3V EC GPIO without level shifters, cutting interconnect complexity and enabling faster boot verification. | Use Scenario: Supervising dual-polarity supplies (+5V digital, +3.3V FPGA, adjustable detector bias, -5V ADC reference) in portable ultrasound transducer modules. IC Role / Device Role / Timing Role: Fault isolation agent asserting separate alerts per rail to host processor, enabling targeted subsystem shutdown without full system reset. Use Value: Adjustable IN3 input supports precise 2.05V detector bias trip point (via R1/R2 divider), matching sensor datasheet requirement without custom ASIC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6339OUB+T | Same pinout and function but with 5% tolerance on IN1/IN2 instead of 10%; tighter threshold accuracy (±0.8% vs ±1.5%) | Better suited for high-precision systems where +5.0V/+3.3V rails require stricter fault detection margins | Select MAX6339OUB+T only if design mandates ≤5% supply tolerance compliance on primary rails. |
| TPS3307-33DGNR | Triple monitor (not quad); monitors +3.3V, +5.0V, and adjustable; no native -5V input - requires external inverter for negative rail | Lacks integrated -5V monitoring capability; needs additional components to replicate MAX6338OUB+T's full rail coverage | Choose TPS3307-33DGNR only when -5V supervision is not required and BOM cost reduction outweighs added design complexity. |
Compared with MAX6338OUB+T, MAX6339OUB+T offers higher threshold precision at the cost of reduced tolerance margin, while TPS3307-33DGNR sacrifices quad-channel integration and native negative-rail support to achieve lower unit cost-making MAX6338OUB+T optimal for compact, full-rail-coverage designs.
Availability
MAX6338OUB+T is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial PLCs, and medical imaging equipment requiring stable component supply with guaranteed long-term manufacturability and RoHS-compliant packaging.
Supply support for MAX6338OUB+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 family was designed specifically for multivoltage system supervision in space-constrained, thermally demanding applications-delivering factory-configured accuracy, ultra-low quiescent current, and integrated negative-rail monitoring without external components.
FAQ
What input voltage configuration does the MAX6338OUB+T support?
The MAX6338OUB+T is factory-configured to monitor four specific rails: IN1 = +5.0V at -10% threshold (4.50V), IN2 = +3.3V at -10% threshold (2.97V), IN3 = adjustable via external resistor divider referenced to the internal 1.23V bandgap, and IN4 = -5.0V at +10% threshold (-4.50V). This exact configuration is fixed for the "O" variant per Maxim's Selector Guide and cannot be altered post-manufacture.
Does the MAX6338OUB+T require external components to operate?
No, the MAX6338OUB+T requires no external components for basic operation. Its factory-trimmed thresholds, internal 1.23V bandgap reference, 10µA internal pullups, and built-in 0.3% hysteresis eliminate the need for external resistors, capacitors, or references. Only a 0.1µF bypass capacitor on VCC is recommended for noisy environments - not mandatory for functionality.
How does the undervoltage lockout (UVLO) function in the MAX6338OUB+T?
The MAX6338OUB+T's UVLO circuit continuously monitors VCC and forces all four outputs low whenever VCC drops below 2.5V - the minimum operating voltage. This ensures predictable, fail-safe behavior during power-up, brownout, or shutdown sequences. Outputs remain low down to VCC = 1V, preventing spurious resets or undefined states in partially powered systems.
Can the MAX6338OUB+T monitor negative voltages, and how is it implemented?
Yes, the MAX6338OUB+T natively monitors -5.0V on IN4 with a +10% threshold (-4.50V). Unlike positive inputs, IN4 uses inverted comparator polarity and accepts -6V to +0.3V input range. This is implemented via dedicated internal circuitry - no external inverter or level shifter is needed. The output (OUT4) remains active-low and wire-OR compatible with other outputs.
What is the purpose of the adjustable input (IN3) on the MAX6338OUB+T?
The adjustable input (IN3) on the MAX6338OUB+T connects directly to the noninverting terminal of its comparator, referenced to the internal 1.23V bandgap. By adding an external resistor divider between IN3 and GND/VCC, users set a custom trip voltage (e.g., 2.7V, 4.5V). This enables monitoring of nonstandard rails or sensor-derived bias voltages without redesigning the supervisor IC.
MAX6338OUB+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:
- 2.93V, 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+T FAQ
1.How can I place an order for MAX6338OUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6338OUB+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 MAX6338OUB+T reliable?
The price and inventory of MAX6338OUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6338OUB+T is usually 5 days.
3.What payment methods are accepted for MAX6338OUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6338OUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6338OUB+T?
MAX6338OUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6338OUB+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 MAX6338OUB+T?
For technical support, including MAX6338OUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6338OUB+T requirements.
6.How does Aetrix verify that MAX6338OUB+T is sourced from the original manufacturer or authorized distributors?
All MAX6338OUB+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 MAX6338OUB+T meets industry standards.
7.What is the process for return or replacement of MAX6338OUB+T?
All MAX6338OUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6338OUB+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 MAX6338OUB+T part is unused and in its original packaging.
Return procedure for MAX6338OUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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