My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6339CUT
- Part No.:
- MAX6339CUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6339CUT.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:674
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6339CUT from Maxim Integrated is a quad voltage supervisory IC that monitors +5.0V (−10%), +3.3V (−10%), +1.8V (−10%), and one user-adjustable input (1.23V internal reference) in multi-rail systems. It provides a single active-low open-drain RESET output with 140ms minimum timeout, operates from IN2 supply (1.0V to 5.5V), draws only 55µA typical supply current, and functions across −40°C to +85°C. It is used in desktop computers and data storage equipment for reliable power-on reset and brownout detection.
For engineers reviewing the MAX6339CUT datasheet, MAX6339CUT pinout, MAX6339CUT application, or MAX6339CUT equivalent, key selection considerations include its factory-set triple fixed thresholds (+5V/−10%, +3.3V/−10%, +1.8V/−10%), adjustable fourth input, 1.0V minimum valid supply condition (IN1 or IN2), immunity to short transients, and SOT23-6 footprint compatibility with space-constrained embedded designs.
Technical Context
The MAX6339CUT integrates four precision comparators with an internal 1.23V bandgap reference and factory-trimmed resistor-divider networks for three fixed thresholds. Each comparator features 0.3% hysteresis to suppress noise-induced false resets without compromising accuracy at nominal voltages.
It uses IN2 as both power source and monitored rail; RESET remains valid down to IN1 ≥ 1V or IN2 ≥ 1V. The open-drain output includes a 10µA internal pullup to IN2, eliminating need for external pullup in many 3.3V logic interfaces while supporting overdrive to other logic supplies up to +5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| +5V Threshold | 4.50V min (−10% tolerance); ensures reset assertion before 5V rail drops below system stability margin |
| +3.3V Threshold | 3.00V min (−10% tolerance); matches common I/O rail derating for reliable core logic supervision |
| +1.8V Threshold | 1.53V min (−10% tolerance); supports low-voltage CPU/memory rails with tight regulation requirements |
| Adjustable Input Ref | 1.23V ±0.03V; enables precise custom monitoring via external resistor divider (e.g., 2.5V, 3.0V) |
| Reset Timeout | 140ms min; guarantees sufficient hold time for microprocessor initialization after all rails stabilize |
| Supply Current | 55µA typ; minimizes quiescent load on monitored IN2 rail, critical for battery-backed or low-power systems |
| Operating Temp | −40°C to +85°C; qualified for industrial and telecom environments without derating |
Pinout & Package
The MAX6339CUT is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and lead-free (RoHS-compliant) finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN1 | +5.0V (−10%) monitored input | Fixed-threshold comparator input; asserts RESET if voltage falls below 4.50V |
| 2 - IN2 | +3.3V (−10%) monitored input & device power supply | Primary VCC; powers internal circuitry and provides internal pullup for RESET; valid down to 1.0V |
| 3 - IN3 | +1.8V (−10%) monitored input | Fixed-threshold comparator input; asserts RESET if voltage falls below 1.53V |
| 4 - IN4 | User-adjustable input (1.23V reference) | Connect external resistor divider to set custom threshold; ±0.1µA input bias enables high-Z design |
| 5 - GND | Analog/digital ground reference | Common return path for all comparators and RESET driver; must be low-impedance for noise immunity |
| 6 - RESET | Active-low open-drain reset output | Drives low when any IN_ fails; internal 10µA pullup to IN2; requires no external pullup for 3.3V logic |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Simultaneously supervises four distinct supply rails with dedicated comparators-no shared reference or timing compromises |
| Factory-trimmed thresholds | ±1.5% initial accuracy on +5V/+3.3V/+1.8V inputs ensures compliance with JEDEC JESD8-12B and Intel VRD specs |
| Transient immunity | Rejects <100µs glitches on any input (per MAX6339toc04), preventing spurious resets in noisy industrial environments |
| No external components required | Eliminates discrete resistors, capacitors, and comparators-reduces BOM count by ≥7 parts vs. discrete supervisory solutions |
| Low-voltage operation | RESET remains functional with IN1 or IN2 ≥ 1.0V, enabling robust reset hold during deep brownout or partial power loss |
Applications
| Desktop Computer Power Sequencing | Data Storage Controller Supervision |
|---|---|
|
Use Scenario: Ensures coordinated power-up of CPU, memory, and chipset rails in ATX-based motherboards. IC Role / Device Role / Timing Role: Quad voltage monitor asserting unified RESET until +5V, +3.3V, +1.8V, and auxiliary rail all exceed thresholds. Use Value: Prevents race conditions during boot by enforcing 140ms minimum reset hold, aligning with Intel's PCH reset timing requirements. |
Use Scenario: Monitors multiple rails powering SAS/SATA controller ASICs and buffer memory in enterprise HDD/SSD enclosures. IC Role / Device Role / Timing Role: Detects undervoltage on +5V (motor drive), +3.3V (I/O), +1.8V (core), and adjustable rail (e.g., +2.5V for PHY) to trigger safe shutdown. Use Value: Enables graceful firmware abort before data corruption occurs, leveraging guaranteed −40°C to +85°C operation in thermally dense storage chassis. |
| Industrial PLC I/O Module | Networking Equipment Line Card |
|
Use Scenario: Supervises isolated DC-DC outputs powering analog front-end, digital logic, and communication interface in programmable logic controllers. IC Role / Device Role / Timing Role: Uses IN4 with external divider to monitor custom +2.4V sensor bias rail while checking standard +5V, +3.3V, +1.8V system rails. Use Value: Reduces component count and board area in space-constrained DIN-rail modules, with transient immunity preventing false trips in EMI-heavy factory floors. |
Use Scenario: Provides fail-safe reset for packet processor, PHY, and management MCU on Ethernet switch line cards with mixed 12V/5V/3.3V/1.8V rails. IC Role / Device Role / Timing Role: Asserts RESET if any rail-including adjustable +1.2V DDR termination supply-drops below threshold during hot-swap events. Use Value: Maintains deterministic reset behavior across temperature extremes (−40°C to +85°C), meeting NEBS Level 3 reliability for carrier-grade hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3307-33D | Triple-monitor (not quad); fixed +3.3V/+2.5V/+1.8V thresholds; no adjustable input; 200ms reset timeout | Lacks fourth monitoring channel and user-adjustable threshold-requires supplemental circuitry for +5V or custom rails | Select when only three rails need supervision and longer reset hold (200ms) is acceptable |
| ADM1266ACPZ | 12-channel sequencer/supervisor with I²C interface, programmable thresholds, and fault logging; 40-pin LFCSP | Far higher integration and configurability but significantly larger size, cost, and design complexity | Select for advanced power management in high-end servers where dynamic reconfiguration and telemetry are required |
Compared with TPS3307-33D and ADM1266ACPZ, the MAX6339CUT delivers exact quad-rail coverage with factory-matched −10% tolerances on +5V/+3.3V/+1.8V plus flexible fourth input-all in a minimal 6-pin SOT23 footprint ideal for cost- and space-sensitive embedded systems.
Availability
MAX6339CUT is available at Aetrix Electronics and suitable for desktop computers, data storage equipment, industrial PLCs, and networking equipment requiring stable component supply and long-term industrial temperature support.
Supply support for MAX6339CUT 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 MAX6339 series was designed specifically for compact, low-power multi-rail supervision in space-constrained embedded systems-emphasizing minimal external components, guaranteed industrial temperature operation, and immunity to supply transients.
FAQ
What is the function of the IN2 pin on the MAX6339CUT?
The IN2 pin serves a dual role: it is both the +3.3V (−10%) monitored input and the primary power supply for the MAX6339CUT. The device draws operating current from IN2, and its internal 10µA pullup for the RESET output connects to IN2. Crucially, RESET remains valid as long as IN2 ≥ 1.0V-or IN1 ≥ 1.0V-enabling reliable reset assertion even during partial brownout conditions. This dual functionality reduces external component count and simplifies power architecture in multi-rail systems.
Can the MAX6339CUT monitor a +2.5V supply?
Yes, the MAX6339CUT can monitor a +2.5V supply using its IN4 pin configured as a user-adjustable input. With an internal 1.23V reference and ±0.1µA input bias, an external resistor divider (e.g., R1 = 100kΩ, R2 = 100kΩ) sets the threshold precisely to +2.5V per the formula VINTH = 1.23V × (R1 + R2)/R2. This capability allows the MAX6339CUT to supervise nonstandard rails like +2.5V I/O or analog supplies without requiring additional ICs or trimming components.
What is the reset timeout period for the MAX6339CUT, and is it adjustable?
The MAX6339CUT has a fixed minimum reset timeout period of 140ms, guaranteed over the full −40°C to +85°C temperature range. This timeout begins after all four monitored inputs rise above their respective thresholds and ensures the RESET signal remains asserted long enough for microprocessors to complete internal initialization. The timeout is not user-adjustable-it is implemented via internal RC timing and is specified as 140ms (min), 200ms (typ), and 280ms (max). This fixed timing eliminates external capacitor dependencies and improves system predictability.
How does the MAX6339CUT handle short voltage transients on monitored inputs?
The MAX6339CUT incorporates built-in transient immunity that rejects input glitches shorter than ~100µs, as verified in the Typical Operating Characteristics (Figure MAX6339toc04). This is achieved through comparator hysteresis (0.3% of threshold) and internal filtering-preventing false resets caused by switching noise, ESD coupling, or inductive kickback. For example, a 50µs dip on the +1.8V rail below 1.53V will not trigger RESET, ensuring robust operation in electrically noisy environments like industrial motor controls or telecom line cards.
What are the absolute maximum ratings for the MAX6339CUT's IN1 and IN4 pins?
The MAX6339CUT specifies different absolute maximum ratings for its inputs based on polarity: IN1 (and IN2, IN3) tolerate −0.3V to +6.0V with respect to GND, while IN4-when configured for negative voltage monitoring (e.g., −5V option)-is rated for −6.0V to +0.3V. However, the MAX6339CUT variant identified as MAX6339CUT uses IN4 for positive adjustable monitoring (1.23V reference), so its IN4 pin follows the −0.3V to +6.0V rating. Exceeding these limits risks permanent damage, and operation outside the recommended 0V to VIN2 range is not guaranteed.
MAX6339CUT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 1.58V, 2.93V, 4.38V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6339CUT FAQ
1.How can I place an order for MAX6339CUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6339CUT 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 MAX6339CUT reliable?
The price and inventory of MAX6339CUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6339CUT is usually 5 days.
3.What payment methods are accepted for MAX6339CUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6339CUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6339CUT?
MAX6339CUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6339CUT 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 MAX6339CUT?
For technical support, including MAX6339CUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6339CUT requirements.
6.How does Aetrix verify that MAX6339CUT is sourced from the original manufacturer or authorized distributors?
All MAX6339CUT 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 MAX6339CUT meets industry standards.
7.What is the process for return or replacement of MAX6339CUT?
All MAX6339CUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6339CUT, 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 MAX6339CUT part is unused and in its original packaging.
Return procedure for MAX6339CUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6339CUT Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
