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Analog Devices Inc./Maxim Integrated MAX6323DUT46-T
- Part No.:
- MAX6323DUT46-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323DUT46-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,079
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Product details
Overview
MAX6323DUT46-T from Maxim Integrated is a microprocessor supervisory circuit with windowed (min/max) watchdog, precision +4.63V reset threshold (±2.5%), and push-pull active-low RESET output. It monitors VCC supply integrity and µP activity in automotive and industrial control systems, asserting RESET below threshold and generating 1ms WDPO fault pulses for out-of-window WDI timing. Guaranteed operation down to VCC = +1.2V supports robust brownout detection.
For engineers reviewing the MAX6323DUT46-T datasheet, MAX6323DUT46-T pinout, MAX6323DUT46-T application, or MAX6323DUT46-T equivalent, key selection criteria include its factory-trimmed 15ms fast / 10s slow watchdog timeout window (suffix 'D'), ±2.5% reset accuracy at 4.63V nominal, 23µA typical supply current, 6-pin SOT23 package, and AEC-Q100-compatible extended temperature range (-40°C to +125°C).
Technical Context
The MAX6323DUT46-T implements a dual-threshold windowed watchdog: fast timeout (15ms min) detects premature WDI falling edges, while slow timeout (10s max) flags missing edges. Its internal comparator guarantees valid RESET assertion down to VCC = +1.2V, enabling reliable power-down reset signaling even during deep brownout conditions.
This variant uses laser-trimmed thresholds-4.63V nominal reset voltage (code '46') and 'D' watchdog configuration-and features debounced MR input, 100ms minimum RESET timeout delay, and open-drain WDPO pulsed low for 1ms on fault detection. All timing is referenced to the last WDI falling edge with ≥300ns pulse width requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% - ensures precise power-on/brownout detection for +5V systems |
| Fast Watchdog Timeout | 15ms min - rejects spurious early WDI pulses without false triggering |
| Slow Watchdog Timeout | 10s max - detects µP lockup or code execution stall over extended intervals |
| Supply Current | 23µA typ - enables ultra-low-power operation in battery-backed or energy-constrained systems |
| RESET Timeout Delay | 100ms min - guarantees sufficient reset hold time for µP initialization sequences |
| Operating Temperature | -40°C to +125°C - meets extended industrial and automotive under-hood requirements |
| VCC Range | 1.2V to 5.5V - supports valid RESET assertion across full brownout recovery range |
Pinout & Package
MAX6323DUT46-T is housed in a 6-pin SOT23 package (package code U6+1A, outline 21-0058), optimized for space-constrained PCB layouts and high-reliability applications including automotive ECUs and industrial controllers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MR | Active-low manual reset input | Internally pulled up; asserts RESET and clears watchdog timer when low ≥1µs; immune to 100ns glitches |
| 2 - GND | Ground reference | Common return path for all internal circuitry and external bypass capacitors (≥500pF on VCC) |
| 3 - WDI | Watchdog input | Falling-edge-triggered; resets internal watchdog timer; requires ≥300ns pulse width |
| 4 - VCC | Supply voltage input | Monitored for reset generation; operates from 1.2V–5.5V; supports bypassing for noise immunity |
| 5 - WDPO | Open-drain watchdog pulse output | Pulsed low for 1ms on fast/slow fault detection; requires external pullup to ≤+6V |
| 6 - RESET | Active-low push-pull reset output | Asserted when VCC < 4.63V or MR low; held ≥100ms after recovery; no external pullup needed |
Key Features
| Feature | Design Value |
|---|---|
| Windowed (min/max) watchdog | Enables detection of both premature and delayed µP activity-critical for safety-critical loop monitoring |
| Laser-trimmed reset threshold | ±2.5% accuracy at 4.63V eliminates need for external resistor networks in +5V system designs |
| Guaranteed RESET validity to VCC = +1.2V | Ensures deterministic reset behavior during deep brownout, preventing undefined µP states |
| Debounced manual reset input | Eliminates need for external RC filtering-MR accepts direct switch connection with 100ns glitch immunity |
| Low quiescent current | 23µA typical draw extends battery life in always-on supervisory applications such as telematics modules |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 5V supply and main µP activity in engine management systems exposed to wide thermal and electrical stress. IC Role / Device Role / Timing Role: Provides power-on reset, brownout protection, and windowed watchdog supervision of µP instruction flow. Use Value: Prevents unsafe ECU operation due to software hang or supply sag by forcing controlled restart via RESET and flagging faults via WDPO. |
Use Scenario: Ensures deterministic startup and runtime integrity of programmable logic controller I/O processors in factory automation cabinets. IC Role / Device Role / Timing Role: Delivers 100ms minimum reset pulse and 10s slow watchdog timeout to detect firmware stalls during cyclic scan execution. Use Value: Maintains functional safety compliance by guaranteeing µP recovery from lockup without requiring host-level intervention. |
| Medical Infusion Pump Controller | Energy Meter Microcontroller |
Use Scenario: Supervises critical µP in Class II medical devices where uninterrupted operation and fail-safe shutdown are mandated. IC Role / Device Role / Timing Role: Acts as independent hardware watchdog with 4.63V reset threshold aligned to 5V rail tolerance and 15ms/10s windowed timing. Use Value: Meets IEC 62304 SW safety requirements by providing hardware-enforced reset and fault signaling independent of µP firmware. |
Use Scenario: Secures metrology µP in smart electricity meters operating continuously on auxiliary power supplies. IC Role / Device Role / Timing Role: Provides low-current (23µA) supervision with guaranteed reset down to 1.2V to handle capacitor discharge during AC loss events. Use Value: Enables accurate energy logging through complete brownout recovery without data corruption or state loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324DUT46-T | Open-drain RESET output instead of push-pull; identical watchdog and reset thresholds | Required when interfacing with bidirectional µP reset pins or level-shifting across multiple supply domains | Select MAX6324DUT46-T only if open-drain RESET is needed for bus sharing or multi-rail compatibility |
| TPS3808G33DBVR | Fixed 3.3V reset threshold; no windowed watchdog; 300ms reset timeout; 2.9µA supply current | Suitable for simpler brownout-only supervision in low-power 3.3V systems without µP activity monitoring | Choose TPS3808G33DBVR only for cost-sensitive, non-safety-critical 3.3V applications lacking watchdog requirements |
Compared with MAX6324DUT46-T, the MAX6323DUT46-T provides push-pull RESET for simplified layout and lower BOM count; compared with TPS3808G33DBVR, it delivers superior functional safety via windowed watchdog and higher-accuracy 4.63V reset for +5V systems.
Availability
MAX6323DUT46-T is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and medical infusion pump controllers requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6323DUT46-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) designs high-performance analog and mixed-signal ICs for demanding industrial, automotive, and medical applications, emphasizing reliability, precision, and integration.
The MAX6323/MAX6324 family targets safety-critical embedded systems needing hardware-enforced µP supervision-specifically delivering windowed watchdog functionality, precision voltage monitoring, and guaranteed reset validity down to 1.2V.
FAQ
What is the exact reset threshold voltage of MAX6323DUT46-T?
The MAX6323DUT46-T has a nominal reset threshold of 4.63V with ±2.5% accuracy across -40°C to +125°C. This value is laser-trimmed at wafer test and specified in the Electrical Characteristics table as VTH = 4.50V (min), 4.63V (typ), 4.75V (max). The '46' suffix in MAX6323DUT46-T explicitly denotes this 4.63V threshold variant.
Does MAX6323DUT46-T support windowed watchdog functionality?
Yes, MAX6323DUT46-T implements true windowed (min/max) watchdog supervision. With suffix 'D', it provides a 15ms minimum fast timeout and 10s maximum slow timeout. This allows detection of both premature WDI pulses (faster than 15ms) and missing pulses (slower than 10s), ensuring comprehensive µP activity monitoring.
What is the RESET output type of MAX6323DUT46-T?
The MAX6323DUT46-T features a push-pull active-low RESET output, eliminating the need for an external pullup resistor. This differs from the MAX6324 series, which uses open-drain RESET. The push-pull design simplifies PCB layout and reduces component count in single-supply systems.
Can MAX6323DUT46-T operate reliably during deep brownout conditions?
Yes, MAX6323DUT46-T guarantees valid RESET assertion down to VCC = +1.2V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections. Below this voltage, the RESET output becomes high-impedance, but the device continues asserting RESET until VCC recovers above the 4.63V threshold plus timeout.
What package and pin count does MAX6323DUT46-T use?
MAX6323DUT46-T is supplied in a 6-pin SOT23 package (package code U6+1A, JEDEC outline 21-0058). Its compact footprint and thermal performance (θJA = 115°C/W on multilayer board) make it suitable for high-density automotive and industrial PCBs where space and reliability are critical.
MAX6323DUT46-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-6
MAX6323DUT46-T FAQ
1.How can I place an order for MAX6323DUT46-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323DUT46-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 MAX6323DUT46-T reliable?
The price and inventory of MAX6323DUT46-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323DUT46-T is usually 5 days.
3.What payment methods are accepted for MAX6323DUT46-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323DUT46-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323DUT46-T?
MAX6323DUT46-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323DUT46-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 MAX6323DUT46-T?
For technical support, including MAX6323DUT46-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323DUT46-T requirements.
6.How does Aetrix verify that MAX6323DUT46-T is sourced from the original manufacturer or authorized distributors?
All MAX6323DUT46-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 MAX6323DUT46-T meets industry standards.
7.What is the process for return or replacement of MAX6323DUT46-T?
All MAX6323DUT46-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323DUT46-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 MAX6323DUT46-T part is unused and in its original packaging.
Return procedure for MAX6323DUT46-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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