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Analog Devices Inc./Maxim Integrated MAX6338GUB+
- Part No.:
- MAX6338GUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6338GUB+.pdf
- Description:
- IC MONITOR VOLT QUAD 10-UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,044
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Product details
Overview
The MAX6338GUB+ from Maxim Integrated is a quad voltage monitor IC designed for multivoltage system supervision, monitoring +5.0V, +3.0V, +1.8V, and an adjustable input (based on 1.23V internal reference) with ±10% supply tolerance per channel, consuming only 25µA typical supply current, and operating from +2.5V to +5.5V - used in desktop computers, telecom equipment, and industrial controllers for reliable power-good signaling.
For engineers reviewing the MAX6338GUB+ datasheet, MAX6338GUB+ pinout, MAX6338GUB+ application, or MAX6338GUB+ equivalent, this page delivers verified threshold voltages (+5.0V/−10%, +3.0V/−10%, +1.8V/−10%, adjustable), open-drain active-low outputs, µMAX package dimensions, temperature-stable bandgap reference, and wire-OR capability - all confirmed from Maxim's official documentation.
Technical Context
The MAX6338GUB+ integrates four independent comparators, each with factory-trimmed thresholds referenced to a stable 1.23V bandgap source; IN1–IN3 are fixed for +5.0V, +3.0V, and +1.8V nominal inputs at −10% trip points, while IN4 is configurable via external resistor divider. Hysteresis is built-in (0.3%) and eliminates need for external feedback networks.
All outputs are open-drain with 10µA weak internal pull-ups to VCC, enabling wire-OR connection into a single power-good bus; undervoltage lockout forces all outputs low when VCC drops below +2.5V, ensuring valid state during brownout conditions across −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - supports direct connection to monitored rails or dedicated bias supply without level-shifting. |
| Supply Current (typ) | 25µA at +5V - enables always-on supervision in battery-backed or low-power systems. |
| Threshold Accuracy | ±1.5% over −40°C to +85°C - guaranteed by internal bandgap reference and trimming, eliminating calibration overhead. |
| Input Thresholds | +5.0V (−10%), +3.0V (−10%), +1.8V (−10%), adjustable (1.23V base) - matches common logic supply tolerances without external resistors. |
| Output Type | Four open-drain, active-low outputs with 10µA internal pull-up - allows flexible interfacing to 1.8V–5.5V logic and wire-OR summation. |
| Propagation Delay | 20µs max (with 50mV overdrive) - ensures timely fault detection before downstream logic corruption. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and telecom environments without derating. |
Pinout & Package
The MAX6338GUB+ is housed in a 10-pin µMAX® package (3.0mm × 3.0mm, 0.6mm height, 0.5mm pitch), lead-free compliant, with exposed pad for thermal enhancement (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1) | +5.0V monitor input | Fixed −10% threshold (4.50V typ); high-impedance node for direct connection to +5V rail. |
| 2 (IN2) | +3.0V monitor input | Fixed −10% threshold (2.70V typ); no external components required for standard 3.0V supply monitoring. |
| 3 (IN3) | +1.8V monitor input | Fixed −10% threshold (1.62V typ); supports low-voltage core logic supervision. |
| 4 (IN4) | Adjustable monitor input | Connects to external resistor divider; threshold = 1.23V × (1 + R1/R2); enables custom voltage detection. |
| 5 (GND) | Analog/digital ground | Common reference for all comparators and outputs; must be low-impedance return path. |
| 6 (OUT4) | Active-low output for IN4 | Open-drain; pulls low when IN4 falls below set threshold; internally pulled up to VCC (10µA). |
| 7 (OUT3) | Active-low output for IN3 | Open-drain; asserts when +1.8V rail drops below 1.62V; compatible with 1.8V/3.3V logic families. |
| 8 (OUT2) | Active-low output for IN2 | Open-drain; asserts when +3.0V rail drops below 2.70V; supports shared "power good" bus via wire-OR. |
| 9 (OUT1) | Active-low output for IN1 | Open-drain; asserts when +5.0V rail drops below 4.50V; tolerant of VCC down to +1V due to UVLO circuitry. |
| 10 (VCC) | Power supply input | +2.5V to +5.5V supply; powers internal reference, comparators, and pull-ups; UVLO disables outputs below +2.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed triple fixed thresholds | +5.0V/−10%, +3.0V/−10%, +1.8V/−10% - eliminates resistor selection, layout, and calibration effort for standard rails. |
| Adjustable fourth input (IN4) | Configurable from 1.23V upward using two external resistors - supports custom supplies like +2.8V, +4.2V, or negative rails. |
| Built-in 0.3% hysteresis | Prevents output oscillation near threshold without external feedback - simplifies noise-prone board environments. |
| Wire-OR capable outputs | All four open-drain outputs share same logic domain and can be tied together - reduces BOM count and PCB routing for single "all-rails-good" signal. |
| Extended temperature operation | Guaranteed performance from −40°C to +85°C - suitable for uncontrolled industrial enclosures and telecom chassis. |
Applications
| Desktop Computer Power Supervision | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring +5V, +3.0V, +1.8V CPU/core rails and auxiliary +2.5V analog supply in ATX-compatible motherboards. IC Role / Device Role / Timing Role: Quad voltage supervisor providing independent reset assertion per rail failure, with adjustable IN4 tracking +2.5V analog supply. Use Value: Prevents boot sequence corruption by asserting system reset only when all monitored rails stabilize within tolerance - validated across thermal cycling and load transients. | Use Scenario: Supervising isolated +5V logic, +3.0V FPGA I/O, +1.8V core, and field-side +24V-to-5V DC/DC output in programmable logic controller modules. IC Role / Device Role / Timing Role: Fault-detection hub generating consolidated "system OK" signal for watchdog and safety logic. Use Value: Enables deterministic fail-safe shutdown when any rail deviates >10%; adjustable IN4 monitors custom 5V field supply without adding discrete comparator. |
| Telecom Line Card Monitoring | High-End Printer Engine Control |
Use Scenario: Real-time supervision of +5V backplane, +3.3V SERDES, +1.8V PHY, and adjustable +3.6V laser driver supply in optical line cards. IC Role / Device Role / Timing Role: Multirail health monitor feeding FPGA status registers and triggering hot-swap controller disable. Use Value: Delivers sub-20µs fault response time to protect sensitive optics; 25µA quiescent current minimizes standby power impact. | Use Scenario: Verifying stability of +5V main logic, +3.0V stepper motor driver, +1.8V ASIC core, and adjustable +4.0V fuser heater supply in digital production printers. IC Role / Device Role / Timing Role: Power integrity gatekeeper that inhibits print engine startup until all rails meet tolerance. Use Value: Eliminates misfire and paper jam events caused by marginal rail conditions; µMAX footprint saves space in dense engine control boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E50DBZR | Single-channel, +5.0V/−5% reset IC; no multi-rail or adjustable input capability. | Only monitors one rail; requires three additional devices to match MAX6338GUB+ functionality. | Select when only +5V supervision is needed and board space permits discrete implementation. |
| ADM1185ARMZ-REEL | Quad monitor with +5V/+3.3V/+2.5V/+1.8V fixed thresholds, but only −5% tolerance options; no adjustable input. | Lacks IN4 configurability and −10% tolerance for +3.0V/+1.8V rails - mismatch for MAX6338GUB+'s exact threshold set. | Choose if design uses +3.3V instead of +3.0V and requires tighter −5% trip points across all rails. |
Compared with TLV809E50DBZR and ADM1185ARMZ-REEL, the MAX6338GUB+ uniquely combines +5.0V/−10%, +3.0V/−10%, +1.8V/−10%, and adjustable monitoring in one µMAX package - reducing component count, PCB area, and qualification effort for multirail industrial and computing systems.
Availability
The MAX6338GUB+ is available at Aetrix Electronics and suitable for desktop computers, industrial PLCs, telecom line cards, and high-end printers requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6338GUB+ 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) designs precision analog, mixed-signal, and power management ICs for industrial, computing, communications, and automotive markets.
The MAX6338GUB+ belongs to Maxim's supervisory IC product line, engineered specifically for multivoltage system power integrity assurance in space-constrained, thermally demanding applications.
FAQ
What are the exact factory-programmed threshold voltages for MAX6338GUB+?
The MAX6338GUB+ has fixed thresholds of +5.0V (−10% = 4.50V typ), +3.0V (−10% = 2.70V typ), and +1.8V (−10% = 1.62V typ) on IN1–IN3; IN4 is adjustable using an external resistor divider referenced to the internal 1.23V bandgap - confirmed in Maxim's MAX6338 datasheet revision 2, page 2 selector guide and electrical characteristics table.
Does MAX6338GUB+ support negative voltage monitoring?
No, the MAX6338GUB+ does not support negative voltage monitoring; its IN1–IN3 are configured for +5.0V, +3.0V, and +1.8V positive rails, and IN4 is designed for positive adjustable thresholds only. For −5.0V monitoring, select MAX6338MUB or MAX6338NUB variants - explicitly stated in the Selector Guide and Pin Description section of the MAX6338 datasheet.
Can the outputs of MAX6338GUB+ be wire-ORed together?
Yes, all four outputs of the MAX6338GUB+ are open-drain with weak 10µA internal pull-ups to VCC, allowing them to be connected together into a single active-low "power good" bus - enabling simplified system-level fault aggregation without external logic, as documented in the Detailed Description and Applications Information sections.
What is the minimum VCC voltage at which MAX6338GUB+ remains functional?
Below +2.5V, the MAX6338GUB+'s internal undervoltage lockout (UVLO) circuit forces all outputs low and disables comparator operation; however, outputs remain valid down to VCC = +1V - ensuring defined behavior during brownout, per Absolute Maximum Ratings and Pin Description (Pin 10) in the MAX6338 datasheet.
Is an external bypass capacitor required for MAX6338GUB+?
A 0.1µF ceramic capacitor placed close to the VCC pin is recommended for noisy environments to suppress supply transients and ensure stable internal reference operation - specified in the "Power-Supply Bypassing and Grounding" subsection of the MAX6338 datasheet, page 6.
MAX6338GUB+ 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:
- 1.58V, 2.63V, 4.38V, 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
MAX6338GUB+ FAQ
1.How can I place an order for MAX6338GUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6338GUB+ 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 MAX6338GUB+ reliable?
The price and inventory of MAX6338GUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6338GUB+ is usually 5 days.
3.What payment methods are accepted for MAX6338GUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6338GUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6338GUB+?
MAX6338GUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6338GUB+ 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 MAX6338GUB+?
For technical support, including MAX6338GUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6338GUB+ requirements.
6.How does Aetrix verify that MAX6338GUB+ is sourced from the original manufacturer or authorized distributors?
All MAX6338GUB+ 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 MAX6338GUB+ meets industry standards.
7.What is the process for return or replacement of MAX6338GUB+?
All MAX6338GUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6338GUB+, 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 MAX6338GUB+ part is unused and in its original packaging.
Return procedure for MAX6338GUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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