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Analog Devices Inc./Maxim Integrated MAX6324AUT29-T
- Part No.:
- MAX6324AUT29-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6324AUT29-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,539
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Product details
Overview
MAX6324AUT29-T from Maxim Integrated is an open-drain microprocessor supervisory IC with windowed (min/max) watchdog, 2.93V ±2.5% reset threshold, 100ms minimum reset timeout, and operation from +1.2V to +5.5V supply. It monitors VCC and WDI timing in automotive and industrial control systems to prevent runaway code execution.
For engineers reviewing the MAX6324AUT29-T datasheet, MAX6324AUT29-T pinout, MAX6324AUT29-T application, or MAX6324AUT29-T equivalent, key selection criteria include its factory-trimmed 293mV hysteresis-compatible reset threshold, dual fault-detection watchdog (fast timeout = 15ms / slow timeout = 300ms), guaranteed RESET validity down to VCC = +1.2V, and AEC-Q100-qualified SOT23-6 package for harsh environments.
Technical Context
The MAX6324AUT29-T implements a laser-trimmed voltage monitor with ±2.5% accuracy across –40°C to +125°C and a windowed watchdog that detects both fast faults (WDI falling edges <15ms apart) and slow faults (no WDI edge >300ms). Its open-drain RESET output requires external pullup and supports bidirectional μP reset pins.
WDPO pulses low for 1ms upon fault detection and remains inactive while RESET is asserted. The internal watchdog timer resets on WDI falling edges within the valid window or on RESET/WDPO deassertion - ensuring deterministic fault response without false triggers during power transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V nominal (2.85V–3.00V range), ±2.5% accuracy over temperature - ensures reliable brownout detection for 3.0V/3.3V systems |
| Reset Timeout Delay | 100ms minimum after VCC rise and MR release - guarantees full processor initialization before release |
| Watchdog Fast Timeout | 15ms typical (10ms–15ms min/max) - detects premature WDI pulses indicating stuck loops or clock faults |
| Watchdog Slow Timeout | 300ms typical (300ms–450ms min/max) - identifies missed WDI edges due to software hang or interrupt lockup |
| Supply Current | 23µA typical at 3.3V - enables always-on supervision in battery-backed or low-power embedded systems |
| Operating Voltage Range | +1.2V to +5.5V - supports valid RESET assertion even during deep brownout conditions |
| Output Type | Open-drain RESET and WDPO - allows level-shifting, wired-OR logic, and direct interface to bidirectional μP reset pins |
Pinout & Package
MAX6324AUT29-T is housed in a RoHS-compliant 6-pin SOT23 package (package code U6+1A, outline 21-0058), rated for –40°C to +125°C operation and qualified to AEC-Q100 Grade 0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MR | Active-low manual reset input | Internally pulled up; asserts RESET and clears watchdog on low pulse ≥1µs - enables hardware-initiated recovery without external components |
| 2 - GND | Ground reference | Common return path for all internal circuitry; must be low-impedance to ensure accurate voltage monitoring |
| 3 - WDI | Watchdog input | Falling-edge-triggered; resets internal timer window - requires clean, debounced signal to avoid false timeouts |
| 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 - signals error condition independently of RESET for NMI or logging use |
| 6 - RESET | Active-low open-drain reset output | Asserted when VCC < 2.93V or MR low; requires external pullup - interfaces directly with bidirectional μP reset pins |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog timer | Detects both early (fast) and late (slow) WDI transitions - prevents false resets from jitter while catching true hangs |
| Laser-trimmed reset threshold | 2.93V ±2.5% over –40°C to +125°C - eliminates need for external resistor divider in precision 3.0V system monitoring |
| Guaranteed RESET down to VCC = +1.2V | Valid reset assertion during deep brownout - ensures controlled shutdown before supply collapse |
| Debounced MR input | 100ns glitch immunity and internal pullup - enables direct switch connection without RC network |
| WDPO fault signaling | 1ms open-drain pulse independent of RESET - supports non-intrusive error logging or NMI-based recovery |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitors 3.3V microcontroller supply and software heartbeat in engine management firmware. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout protection, and windowed watchdog supervision of WDI pulses from main loop. Use Value: Prevents unsafe ECU operation during voltage sags or software lockup by asserting RESET and pulsing WDPO for diagnostic capture. |
Use Scenario: Ensures deterministic restart of programmable logic controller CPU during fieldbus communication failures. IC Role / Device Role / Timing Role: System-level supervisor detecting both fast (interrupt latency violation) and slow (task scheduler stall) WDI anomalies. Use Value: Enables fail-safe recovery without requiring external watchdog ICs - reduces BOM count and PCB area in space-constrained modules. |
| Medical Infusion Pump Controller | Embedded Telematics Gateway |
|
Use Scenario: Guarantees safe shutdown and restart of safety-critical pump motor control MCU during power fluctuations. IC Role / Device Role / Timing Role: Fault-tolerant supervisor with RESET valid down to +1.2V and open-drain outputs compatible with isolated reset domains. Use Value: Meets IEC 62304 Class C requirements via deterministic reset behavior and AEC-Q100-qualified reliability. |
Use Scenario: Manages boot integrity and runtime health of dual-core telematics SoC in connected vehicle platforms. IC Role / Device Role / Timing Role: Dual-output supervisor using WDPO for fault logging and RESET for hard reset - supports OTA update rollback on failure. Use Value: Provides independent watchdog signaling without consuming GPIO resources - preserves SoC pin count for CAN FD and cellular interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324HUT29-T | Same 2.93V reset threshold but H-window watchdog (719ms fast / 1.3s slow timeout) | Targets slower-loop applications (e.g., HVAC controllers) where 300ms slow timeout is insufficient | Select when longer watchdog windows are required for extended task durations |
| TPS3808G33DBVR | Fixed 3.3V reset threshold, no windowed watchdog (only simple timeout), 35µA supply current | Suitable for basic power-monitoring only; lacks dual-fault detection capability of MAX6324AUT29-T | Choose for cost-sensitive designs where min/max watchdog functionality is unnecessary |
Compared with MAX6324HUT29-T and TPS3808G33DBVR, the MAX6324AUT29-T uniquely delivers factory-trimmed 2.93V supervision with 15ms/300ms windowed watchdog timing - enabling precise fault detection in 3.0V embedded systems without design-time calibration or external components.
Availability
MAX6324AUT29-T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pumps, and embedded telematics gateways requiring stable component supply under AEC-Q100 and extended temperature conditions.
Supply support for MAX6324AUT29-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 automotive, industrial, and communications markets, with emphasis on reliability and integration.
The MAX6324AUT29-T belongs to the MAX6323/MAX6324 family of μP supervisory circuits engineered specifically for safety-critical embedded systems requiring deterministic reset behavior and dual-mode watchdog supervision.
FAQ
What is the exact reset threshold voltage of the MAX6324AUT29-T?
The MAX6324AUT29-T has a nominal reset threshold of 2.93V, with a guaranteed range of 2.85V to 3.00V (±2.5%) over the full operating temperature range of –40°C to +125°C. This value is laser-trimmed at wafer test and does not require external calibration. The "29" suffix in MAX6324AUT29-T explicitly denotes this 2.93V threshold variant.
Does the MAX6324AUT29-T support windowed watchdog functionality?
Yes, the MAX6324AUT29-T implements a true windowed (min/max) watchdog timer. It detects fast faults when WDI falling edges occur less than 15ms apart and slow faults when no WDI edge occurs for more than 300ms. This dual-threshold detection prevents both premature resets from noise and undetected hangs from software stalls - a capability confirmed in the device's Electrical Characteristics table and Figure 1 of the datasheet.
Can the MAX6324AUT29-T operate reliably during deep brownout conditions?
Yes, the MAX6324AUT29-T guarantees valid RESET assertion down to VCC = +1.2V, as specified in the General Description and Electrical Characteristics. Below this voltage, the internal circuitry ceases to sink current, but the output remains predictably asserted until VCC drops further. This feature ensures controlled system shutdown in automotive and industrial applications experiencing severe supply sag.
What is the function of the WDPO pin on the MAX6324AUT29-T?
The WDPO (Watchdog Pulse Output) pin on the MAX6324AUT29-T is an open-drain output that pulses low for 1ms upon detection of either a fast or slow watchdog fault. Unlike RESET, WDPO operates independently and remains inactive while RESET is asserted. It is designed for non-intrusive fault signaling - such as triggering an NMI interrupt or logging event - without forcing a full system reset.
Is the MAX6324AUT29-T qualified for automotive applications?
Yes, the MAX6324AUT29-T is AEC-Q100 qualified (Grade 0, –40°C to +125°C) and packaged in a lead-free 6-pin SOT23 (U6+1A). Its qualification is confirmed in the Features section ("AEC-Q100 Qualified MAX6324HUT44/V+T") and Ordering Information table, which lists /V suffix variants - and the "-T" suffix indicates tape-and-reel packaging compliant with automotive logistics standards.
MAX6324AUT29-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:
- 2.93V
- Output:
- Open Drain or Open Collector
- 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
MAX6324AUT29-T FAQ
1.How can I place an order for MAX6324AUT29-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6324AUT29-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 MAX6324AUT29-T reliable?
The price and inventory of MAX6324AUT29-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6324AUT29-T is usually 5 days.
3.What payment methods are accepted for MAX6324AUT29-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6324AUT29-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6324AUT29-T?
MAX6324AUT29-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6324AUT29-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 MAX6324AUT29-T?
For technical support, including MAX6324AUT29-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6324AUT29-T requirements.
6.How does Aetrix verify that MAX6324AUT29-T is sourced from the original manufacturer or authorized distributors?
All MAX6324AUT29-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 MAX6324AUT29-T meets industry standards.
7.What is the process for return or replacement of MAX6324AUT29-T?
All MAX6324AUT29-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6324AUT29-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 MAX6324AUT29-T part is unused and in its original packaging.
Return procedure for MAX6324AUT29-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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