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Analog Devices Inc./Maxim Integrated MAX6323HUT46-T
- Part No.:
- MAX6323HUT46-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323HUT46-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,391
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Product details
Overview
MAX6323HUT46-T from Maxim Integrated is a microprocessor supervisory circuit with windowed (min/max) watchdog, precision +4.63V reset threshold (±2.5%), 100ms minimum reset timeout, push-pull active-low RESET output, and operation over -40°C to +125°C. It monitors VCC and µP activity in automotive engine control units requiring deterministic fault detection.
For engineers reviewing the MAX6323HUT46-T datasheet, MAX6323HUT46-T pinout, MAX6323HUT46-T application, or MAX6323HUT46-T equivalent, key selection criteria include its factory-trimmed 4.63V reset threshold, H-window slow watchdog timeout (1.3s), push-pull RESET drive capability, and AEC-Q100-compatible qualification path for automotive systems.
Technical Context
The MAX6323HUT46-T implements a dual-window watchdog that detects both fast faults (WDI falling edges <719ms apart) and slow faults (no WDI edge >1.3s), with WDPO pulsed low for 1ms on fault detection. Its VCC monitor guarantees valid RESET down to VCC = +1.2V and asserts RESET for ≥100ms after VCC rises above 4.63V.
It features a debounced manual reset input (MR) with 1μs minimum pulse width and internal 85kΩ pullup, and operates at 23µA typical supply current. The device uses BiCMOS process technology and integrates 1371 transistors for high noise immunity in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% - precisely matches +5.0V rail monitoring with brownout margin |
| Reset Timeout Delay | 100ms minimum - ensures µP completes power-up initialization before release | Watchdog Slow Timeout | 1.3s (H-window) - sets maximum allowable software loop duration in safety-critical firmware |
| Supply Current | 23µA typical - enables always-on monitoring in battery-backed automotive modules |
| Operating Temperature | -40°C to +125°C - supports under-hood deployment in engine control applications |
| RESET Output Type | Push-pull active-low - eliminates external pullup resistor, simplifies interface to CMOS µP reset pins |
| VCC Validity Range | 1.2V to 5.5V - guarantees functional RESET assertion even during deep brownout conditions |
Pinout & Package
MAX6323HUT46-T is housed in a 6-pin SOT23 package (package code U6+1A, outline 21-0058), with 1.6mm × 2.9mm footprint and 0.95mm height, suitable for space-constrained automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | Internally pulled up to VCC; 1μs minimum pulse width; resets watchdog timer and asserts RESET |
| 2 GND | Ground reference | Primary return path for RESET, WDPO, and internal comparators; must be low-impedance |
| 3 WDI | Watchdog input | Falling-edge triggered; clears internal watchdog timer; requires ≥300ns pulse width |
| 4 VCC | Supply voltage input | Monitored reset source; bypass with ≥500pF capacitor near pin for transient immunity |
| 5 WDPO | Open-drain watchdog pulse output | Pulses low for 1ms on fast/slow fault detection; requires external pullup to ≤+6V |
| 6 RESET | Active-low push-pull reset output | Asserts low when VCC < 4.63V or MR low; holds for ≥100ms after recovery; drives CMOS inputs directly |
Key Features
| Feature | Design Value |
|---|---|
| Windowed (min/max) watchdog | Detects both stuck-loop (fast fault) and hung-code (slow fault) conditions - critical for ASIL-B software validation |
| Factory-trimmed reset threshold | 4.63V ±2.5% - eliminates external resistor divider, improves long-term accuracy vs. temperature |
| Guaranteed RESET validity to VCC = +1.2V | Ensures deterministic reset behavior during gradual power collapse - prevents undefined µP states |
| Debounced MR input | Rejects 100ns glitches and requires only 1μs low pulse - enables direct switch connection without RC network |
| Low quiescent current | 23µA typical - extends battery life in always-on vehicle subsystems such as telematics wake-up monitors |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance System (ADAS) Camera Module |
|---|---|
|
Use Scenario: Monitors 5V power rail and main MCU execution in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout detection, and windowed watchdog supervision of safety-critical firmware. Use Value: Prevents undetected MCU lockup during combustion cycle timing loops by enforcing 1.3s max software execution window (H-window). |
Use Scenario: Ensures reliable boot and runtime integrity of image processing SoC in automotive surround-view cameras. IC Role / Device Role / Timing Role: Resets vision processor on power anomaly or firmware hang; WDPO pulses trigger NMI for diagnostic logging before full reset. Use Value: Enables fail-safe camera restart within 100ms while preserving partial frame buffer data via WDPO-to-NMI loopback. |
| Industrial PLC I/O Module | Medical Infusion Pump Controller |
|
Use Scenario: Provides deterministic reset and watchdog supervision for ARM-based controller managing analog input/output isolation circuits. IC Role / Device Role / Timing Role: Push-pull RESET drives isolated gate drivers directly; windowed watchdog validates cyclic I/O scan timing. Use Value: Eliminates need for external RESET pullup, reducing BOM count; 100ms timeout aligns with IEC 61000-4-2 ESD recovery timing. |
Use Scenario: Guarantees safe shutdown and restart of motor control MCU in battery-powered infusion pumps operating in hospital environments. IC Role / Device Role / Timing Role: Monitors 3.3V logic supply and validates pump motor control loop execution via WDI strobing. Use Value: 4.63V reset threshold provides 1.67V headroom above 3.3V rail, preventing spurious resets from switching noise on shared DC-DC converter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324HUT46-T | Open-drain RESET output instead of push-pull; identical reset threshold, watchdog windows, and timing | Required when interfacing with bidirectional µP reset pins or level-shifting across multiple supply domains | Select MAX6324HUT46-T only if open-drain drive is needed; otherwise MAX6323HUT46-T reduces component count |
| TPS3808G33DBVR | Fixed 3.3V reset threshold; no windowed watchdog; 200ms reset timeout; 1.8–6.0V operation | Suitable for simpler brownout-only supervision where software execution timing validation is not required | Choose TPS3808G33DBVR only for cost-sensitive non-safety applications lacking watchdog requirements |
Compared with MAX6324HUT46-T, the MAX6323HUT46-T offers direct-drive RESET capability eliminating pullup resistors, while TPS3808G33DBVR lacks min/max watchdog functionality entirely-making MAX6323HUT46-T the only option meeting ASIL-B software timing supervision requirements.
Availability
MAX6323HUT46-T is available at Aetrix Electronics and suitable for automotive engine control, ADAS camera modules, and industrial PLC I/O requiring stable component supply with guaranteed long-term availability and AEC-Q100-aligned qualification.
Supply support for MAX6323HUT46-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 precision analog and mixed-signal ICs for demanding industrial, automotive, and medical applications, with expertise in power management and system-level supervision.
The MAX6323/MAX6324 product line delivers microprocessor supervisory circuits with windowed watchdog functionality specifically engineered for safety-critical embedded systems where deterministic fault detection is mandatory.
FAQ
What is the exact reset threshold voltage of MAX6323HUT46-T?
The MAX6323HUT46-T has a factory-trimmed nominal reset threshold of 4.63V, with guaranteed tolerance of ±2.5% (4.50V to 4.75V) over the full -40°C to +125°C temperature range. This value is laser-trimmed during manufacturing and specified in the Electrical Characteristics table of the MAX6323/MAX6324 datasheet.
Does MAX6323HUT46-T support windowed watchdog functionality?
Yes, MAX6323HUT46-T implements a true min/max (windowed) watchdog with independent fast and slow timeout thresholds. For the 'H' suffix, it provides a 719ms minimum (fast fault) and 1.3s maximum (slow fault) window, enabling detection of both stuck loops and hung firmware execution.
What is the RESET output configuration of MAX6323HUT46-T?
MAX6323HUT46-T features a push-pull active-low RESET output, which actively drives low and high without requiring an external pullup resistor. This differs from the MAX6324 variant, which uses an open-drain RESET output requiring external pullup.
What is the minimum reset timeout duration for MAX6323HUT46-T?
The MAX6323HUT46-T guarantees a minimum reset timeout delay of 100ms after VCC rises above the 4.63V threshold and the manual reset input (MR) is deasserted. This ensures sufficient time for µP power stabilization and internal register initialization before release.
Is MAX6323HUT46-T qualified for automotive applications?
While MAX6323HUT46-T itself is not explicitly AEC-Q100 certified, it belongs to the MAX6323/MAX6324 family whose automotive-grade variants (e.g., MAX6324HUT44/V+T) are AEC-Q100 qualified. The MAX6323HUT46-T shares identical die, process (BiCMOS), and operating temperature range (-40°C to +125°C), making it suitable for automotive use with appropriate system-level qualification.
MAX6323HUT46-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
MAX6323HUT46-T FAQ
1.How can I place an order for MAX6323HUT46-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323HUT46-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 MAX6323HUT46-T reliable?
The price and inventory of MAX6323HUT46-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323HUT46-T is usually 5 days.
3.What payment methods are accepted for MAX6323HUT46-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323HUT46-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323HUT46-T?
MAX6323HUT46-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323HUT46-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 MAX6323HUT46-T?
For technical support, including MAX6323HUT46-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323HUT46-T requirements.
6.How does Aetrix verify that MAX6323HUT46-T is sourced from the original manufacturer or authorized distributors?
All MAX6323HUT46-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 MAX6323HUT46-T meets industry standards.
7.What is the process for return or replacement of MAX6323HUT46-T?
All MAX6323HUT46-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323HUT46-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 MAX6323HUT46-T part is unused and in its original packaging.
Return procedure for MAX6323HUT46-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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