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Analog Devices Inc./Maxim Integrated MAX6323DUT46
- Part No.:
- MAX6323DUT46
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323DUT46.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,515
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Product details
Overview
MAX6323DUT46 from Maxim Integrated is a microprocessor supervisory circuit with windowed (min/max) watchdog, precision +4.63V reset threshold (±2.5%), 15ms fast timeout and 10s slow timeout, push-pull RESET output, and operation from VCC = +1.2V to +5.5V. It monitors power integrity and processor timing in automotive engine control units requiring fail-safe boot and runtime fault detection.
For engineers reviewing the MAX6323DUT46 datasheet, MAX6323DUT46 pinout, MAX6323DUT46 application, or MAX6323DUT46 equivalent, key selection criteria include its factory-trimmed 4.63V reset threshold, dual-window watchdog timing (15ms/10s), guaranteed RESET validity down to VCC = +1.2V, SOT23-6 package compatibility, and AEC-Q100-qualified variants for automotive use.
Technical Context
The MAX6323DUT46 implements a min/max watchdog architecture where WDI falling edges must occur within a defined window-faster than 15ms (tWD1) or slower than 10s (tWD2)-to avoid WDPO assertion. Its internal reset comparator guarantees valid low-active RESET output even as VCC decays to +1.2V, enabling robust brownout recovery in noisy automotive environments.
RESET is push-pull (not open-drain), eliminating external pull-up requirements, while WDPO remains open-drain with 1ms pulse width on fault detection. The device uses laser-trimmed thresholds and operates across –40°C to +125°C, supporting extended-temperature embedded control without external calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | +4.63V nominal (±2.5%), ensuring reliable detection of +5.0V supply brownout before µP malfunction |
| Fast Watchdog Timeout | 15ms minimum, preventing false triggers from short software loops while catching rapid execution faults |
| Slow Watchdog Timeout | 10s maximum, detecting stalled firmware or infinite loops without premature system reset |
| Supply Current | 23µA typical at 3.3V, enabling always-on supervision in battery-backed or low-power ECU modules |
| RESET Validity Range | Guaranteed down to VCC = +1.2V, allowing deterministic reset assertion during deep brownout conditions |
| Operating Temperature | –40°C to +125°C, meeting under-hood automotive thermal requirements without derating |
| Package | 6-pin SOT23, compatible with high-density PCB layouts and automated SMT assembly |
Pinout & Package
MAX6323DUT46 is housed in a 6-pin SOT23 package (package code U6-1), with 1.6mm × 2.9mm footprint and 0.95mm height, optimized for space-constrained automotive and industrial control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MR | Active-low manual reset input | Internally pulled up; asserts RESET and clears watchdog timer when driven low ≥1µs; immune to 100ns glitches |
| 2 - GND | Ground reference | Common return path for all internal circuits; requires low-inductance connection to minimize noise coupling |
| 3 - WDI | Watchdog input | Falling-edge triggered; resets internal timer; minimum 300ns pulse width required; rejects <100ns noise |
| 4 - VCC | Supply voltage input | Monitored for reset generation; bypass with ≥500pF capacitor near pin to suppress transients |
| 5 - WDPO | Open-drain watchdog pulse output | Pulses low for 1ms on fast/slow fault detection; requires external pull-up; active only when RESET is high |
| 6 - RESET | Active-low push-pull reset output | Asserted when VCC < 4.63V or MR low; held ≥100ms after recovery; no external pull-up needed |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog | Enables detection of both stuck and runaway code by enforcing upper and lower timing bounds on WDI pulses |
| Factory-laser-trimmed thresholds | Eliminates external resistor networks and calibration steps; ensures ±2.5% reset accuracy over temperature |
| Push-pull RESET output | Reduces BOM count and layout complexity by removing need for external pull-up resistor on reset line |
| Debounced MR input | Accepts direct switch connection without RC network; rejects sub-100ns noise, simplifying front-panel reset design |
| VCC = +1.2V RESET validity | Ensures deterministic reset behavior during severe brownout, critical for safety-critical automotive restart sequences |
Applications
| Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Real-time monitoring of microcontroller execution in gasoline/diesel engine management systems subject to voltage transients and EMI. IC Role / Device Role / Timing Role: Supervises VCC stability and µP instruction flow via WDI; asserts RESET on brownout or watchdog timeout; pulses WDPO for diagnostic logging. Use Value: Prevents unsafe engine operation due to silent µP lockup; enables fault-triggered CAN message reporting before full reset. |
Use Scenario: Ensuring deterministic startup and runtime integrity of programmable logic controller digital I/O cards in factory automation cabinets. IC Role / Device Role / Timing Role: Generates power-on reset and detects µP hang via windowed watchdog; provides clean, glitch-free RESET signal to FPGA and interface ASICs. Use Value: Eliminates need for external reset supervisors and timing ICs; reduces board area and improves mean time between failures (MTBF). |
| Medical Infusion Pump Controller | Railway Signaling Interface |
|
Use Scenario: Safety-critical supervision of ARM-based pump controller firmware that must guarantee precise motor actuation timing and dose delivery. IC Role / Device Role / Timing Role: Monitors +5.0V supply and validates µP heartbeat via WDI; asserts RESET on out-of-window timing or undervoltage; supports fail-safe shutdown. Use Value: Meets IEC 62304 Class C software safety requirements by providing hardware-enforced watchdog with min/max timing enforcement. |
Use Scenario: Reliable boot and runtime supervision of microcontrollers managing track-side signal relays in harsh railway environments with wide temperature swings. IC Role / Device Role / Timing Role: Provides cold-start reset and detects µP freeze during train detection cycles; WDPO pulses trigger redundant watchdog in companion safety MCU. Use Value: Enables SIL-2 compliance through independent, hardware-based timing validation and dual-channel fault signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324DUT46 | Identical reset threshold and watchdog timing, but open-drain RESET output instead of push-pull | Required when interfacing with bidirectional µP reset pins or level-shifting across multiple supply domains | Select MAX6324DUT46 only if open-drain RESET is necessary; otherwise MAX6323DUT46 reduces component count. |
| TPS3808G33DBVR | Fixed 3.3V reset threshold, single-window watchdog (no min/max), 200ms reset timeout, higher 25µA ICC | Suitable for simpler 3.3V systems without need for dual-timing fault detection or 4.63V monitoring | Choose TPS3808G33DBVR only for cost-sensitive 3.3V designs lacking windowed watchdog requirements. |
Compared with MAX6324DUT46 and TPS3808G33DBVR, the MAX6323DUT46 uniquely combines +4.63V precision reset, min/max watchdog enforcement, push-pull RESET, and extended-temperature operation-making it the sole option for AEC-Q100-compliant 5V automotive ECUs requiring deterministic fault response.
Availability
MAX6323DUT46 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and medical infusion pump controllers requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned qualification.
Supply support for MAX6323DUT46 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 and mixed-signal ICs for automotive, industrial, and medical applications, emphasizing reliability, low power, and high integration.
The MAX6323/MAX6324 family delivers microprocessor supervision with windowed watchdog functionality specifically for safety-critical embedded systems where standard timeout supervision is insufficient.
FAQ
What is the exact reset threshold voltage of MAX6323DUT46?
The MAX6323DUT46 has a nominal reset threshold of +4.63V, with guaranteed tolerance of ±2.5% over –40°C to +125°C. This value is laser-trimmed at wafer test and specified as 4.50V (min), 4.63V (typ), and 4.75V (max) in the Electrical Characteristics table. The "46" suffix in MAX6323DUT46 explicitly denotes this 4.63V threshold variant.
Does MAX6323DUT46 support windowed (min/max) watchdog functionality?
Yes, MAX6323DUT46 implements true min/max watchdog supervision: it triggers WDPO on WDI falling edges occurring either faster than 15ms (fast timeout) or slower than 10s (slow timeout). This dual-bound detection distinguishes it from single-window watchdogs and prevents both stuck-loop and runaway-code failures in safety-critical firmware.
Is MAX6323DUT46 pin-compatible with other MAX6323 variants?
Yes, all MAX6323 variants-including MAX6323DUT46-share identical 6-pin SOT23 pinout, electrical interface, and functional block diagram. Only the factory-trimmed reset threshold (4.63V) and watchdog timing (15ms/10s) differ; no PCB layout changes are required when substituting within the MAX6323 family.
What is the minimum VCC voltage at which MAX6323DUT46 guarantees valid RESET output?
MAX6323DUT46 guarantees valid active-low RESET output down to VCC = +1.2V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections. Below this voltage, the RESET driver ceases sinking current and enters high-impedance state-ensuring predictable behavior during deep brownout recovery sequences.
Can MAX6323DUT46 be used in automotive applications requiring AEC-Q100 qualification?
While MAX6323DUT46 itself is not AEC-Q100 qualified, the functionally identical MAX6324HUT44/V+T is explicitly AEC-Q100 qualified. For automotive designs requiring formal qualification, engineers should select the /V+T automotive-grade variant; MAX6323DUT46 remains suitable for non-automotive industrial and medical applications operating across –40°C to +125°C.
MAX6323DUT46 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:
- Watchdog Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6323DUT46 FAQ
1.How can I place an order for MAX6323DUT46 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323DUT46 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 MAX6323DUT46 reliable?
The price and inventory of MAX6323DUT46 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323DUT46 is usually 5 days.
3.What payment methods are accepted for MAX6323DUT46?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323DUT46 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323DUT46?
MAX6323DUT46 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323DUT46 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 MAX6323DUT46?
For technical support, including MAX6323DUT46 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323DUT46 requirements.
6.How does Aetrix verify that MAX6323DUT46 is sourced from the original manufacturer or authorized distributors?
All MAX6323DUT46 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 MAX6323DUT46 meets industry standards.
7.What is the process for return or replacement of MAX6323DUT46?
All MAX6323DUT46 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323DUT46, 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 MAX6323DUT46 part is unused and in its original packaging.
Return procedure for MAX6323DUT46:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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