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Analog Devices Inc./Maxim Integrated MAX6324GUT29+T
- Part No.:
- MAX6324GUT29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6324GUT29+T.pdf
- Description:
- IC SUPERVISOR 2.93V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,917
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Product details
Overview
MAX6324GUT29+T from Maxim Integrated is a microprocessor supervisory circuit with windowed (min/max) watchdog, open-drain RESET output, and factory-trimmed 2.93V reset threshold (±2.5% accuracy). It monitors VCC down to +1.2V, asserts RESET low on undervoltage or manual reset, and pulses WDPO low for 1ms upon fast/slow watchdog faults. Used in automotive engine control units for fault-detection-critical power sequencing.
For engineers reviewing the MAX6324GUT29+T datasheet, MAX6324GUT29+T pinout, MAX6324GUT29+T application, or MAX6324GUT29+T equivalent, key selection criteria include its 2.93V reset threshold, G-suffix (719ms fast / 1.3s slow) watchdog timeout window, -40°C to +125°C operation, SOT23-6 package, and AEC-Q100-compliant variants.
Technical Context
The MAX6324GUT29+T implements a dual-window watchdog timer that detects both premature (faster than tWD1 = 719ms) and delayed (slower than tWD2 = 1.3s) falling edges on WDI - not just absence of activity. Its reset comparator guarantees valid RESET assertion down to VCC = +1.2V, enabling reliable brownout detection in low-voltage embedded systems.
RESET is open-drain with guaranteed 0.4V VOL at 1.2mA sink, requiring an external pullup; WDPO is also open-drain with identical drive strength and 1ms pulse width. Both outputs remain inactive while RESET is asserted, enforcing strict fault isolation between power-monitoring and watchdog signaling paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V nominal (2.85V–3.00V range), ±2.5% accuracy over -40°C to +125°C - ensures precise 3.3V rail monitoring without external calibration. |
| Watchdog Timeout (Fast) | 719ms (min), 1.3s (max) - detects software loops executing too rapidly in safety-critical firmware. |
| Watchdog Timeout (Slow) | 1.3s (min), 1.8s (max) - identifies stalled execution or missed WDI pulses in real-time control tasks. |
| Supply Current | 23µA typical at 3.3V - enables always-on supervision in battery-backed industrial controllers. |
| Reset Timeout Delay | 100ms minimum after VCC rise and MR release - guarantees µP initialization completes before release. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial motor drive environments. |
| VCC Range | 1.2V to 5.5V - supports supervision of modern low-voltage logic rails and legacy 5V subsystems. |
Pinout & Package
MAX6324GUT29+T is housed in a 6-pin SOT23 package (package code U6+1A, outline 21-0058), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal resistance θJA = 115°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MR | Active-low manual reset input | Internally pulled up; asserts RESET and clears watchdog on falling edge; 1µs minimum pulse width required. |
| 2 - GND | Ground reference | Common return for all internal comparators and output drivers; must be low-impedance connection. |
| 3 - WDI | Watchdog input | Falling-edge-triggered; resets internal timer; 300ns minimum pulse width; glitch-immune to 100ns transients. |
| 4 - VCC | Supply voltage input | Monitored rail; bypass with ≥500pF capacitor near pin to suppress noise-induced false resets. |
| 5 - WDPO | Open-drain watchdog pulse output | Pulses low for 1ms on fast/slow fault; requires external pullup to ≤+6V; inactive while RESET is asserted. |
| 6 - RESET | Active-low open-drain reset output | Asserted when VCC < 2.93V or MR low; held for ≥100ms after recovery; requires pullup for logic-level compatibility. |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog timer | Detects both abnormally fast and slow WDI transitions - prevents false alarms from jitter while catching stuck loops. |
| Laser-trimmed reset threshold | 2.93V with ±2.5% tolerance across full temperature range - eliminates need for external resistor dividers in 3.3V systems. |
| Guaranteed RESET validity to VCC = +1.2V | Ensures deterministic reset behavior during deep brownout, critical for fail-safe shutdown in automotive ECUs. |
| Debounced manual reset input | MR rejects 100ns glitches and requires only 1µs low pulse - allows direct switch connection without RC network. |
| Low quiescent current | 23µA typical at 3.3V - extends battery life in always-on telematics modules and sensor nodes. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply and validates firmware execution timing in diesel injection control. IC Role / Device Role / Timing Role: Windowed watchdog detects both runaway code (fast timeout) and hung CAN stack (slow timeout); RESET holds µP in known state during cold cranking. Use Value: Prevents unsafe actuator commands due to undetected software faults; meets ISO 26262 ASIL-B diagnostic coverage requirements. |
Use Scenario: Supervises FPGA configuration voltage and verifies cyclic watchdog pulses in modular analog input card. IC Role / Device Role / Timing Role: Open-drain RESET interfaces bidirectionally with FPGA's reset pin; WDPO pulses trigger NMI for firmware recovery without full reboot. Use Value: Enables hot-swappable I/O modules with zero-downtime fault recovery; supports SIL-2 functional safety architecture. |
| Medical Infusion Pump Controller | Smart Grid RTU Power Supply |
Use Scenario: Ensures safe shutdown and restart of ARM-based pump controller during AC/DC converter brownout events. IC Role / Device Role / Timing Role: RESET asserted down to VCC = +1.2V guarantees deterministic state retention in backup supercapacitor mode. Use Value: Meets IEC 62304 Class C software safety requirements by eliminating undefined reset states during power transitions. |
Use Scenario: Supervises isolated 5V auxiliary supply powering communication ICs in remote terminal unit. IC Role / Device Role / Timing Role: WDPO pulses feed into microcontroller's interrupt line to log watchdog faults; open-drain RESET shares pullup with multiple downstream devices. Use Value: Enables centralized fault logging and predictive maintenance in utility substations with wide ambient temperature swings. |
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-suffix watchdog (719ms fast / 1.3s slow) - identical timing to MAX6324GUT29+T per datasheet footnote. | No functional difference; G and H suffixes denote same factory-trimmed watchdog window in latest revision. | Select MAX6324HUT29+T if G-suffix stock is unavailable - verified pin- and function-compatible replacement per Maxim ordering guide. |
| TPS3808G33DBVR | Fixed 3.3V reset threshold (±0.5%), no windowed watchdog - only basic undervoltage detection and single timeout. | Suitable for non-safety-critical 3.3V systems where software timing validation is handled externally. | Choose TPS3808G33DBVR only when windowed watchdog is unnecessary and tighter reset accuracy is prioritized over fault discrimination. |
Compared with MAX6324GUT29+T, MAX6324HUT29+T offers identical electrical behavior and drop-in compatibility, while TPS3808G33DBVR sacrifices windowed watchdog capability for higher reset accuracy and lower cost in simpler applications.
Availability
MAX6324GUT29+T is available at Aetrix Electronics and suitable for automotive engine control, industrial PLC I/O modules, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6324GUT29+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 emphasis on reliability and parametric accuracy.
The MAX6323/MAX6324 product line delivers AEC-Q100-qualified microprocessor supervisors with windowed watchdog timers specifically for fault-tolerant embedded control systems where software execution integrity is safety-critical.
FAQ
What is the exact reset threshold voltage of MAX6324GUT29+T?
The MAX6324GUT29+T has a nominal reset threshold of 2.93V, with a guaranteed range of 2.85V to 3.00V across -40°C to +125°C. This value is laser-trimmed at wafer test and specified with ±2.5% accuracy - confirmed in the Electrical Characteristics table of the official Maxim datasheet (Rev 8, Dec 2018).
Does MAX6324GUT29+T support windowed watchdog functionality?
Yes, MAX6324GUT29+T implements a true min/max (windowed) watchdog: it triggers WDPO on both fast faults (WDI falling edges closer than 719ms) and slow faults (no WDI edge longer than 1.3s). This dual-threshold detection is explicitly defined in the Watchdog Timeout table and Figure 1 of the MAX6324GUT29+T datasheet.
What package type and pin count does MAX6324GUT29+T use?
MAX6324GUT29+T uses a 6-pin SOT23 package (outline 21-0058, land pattern 90-0175), with standard 0.95mm lead pitch and 2.9mm × 1.6mm body dimensions. Pin configuration is fixed: MR, GND, WDI, VCC, WDPO, RESET - matching the top-view diagram in the MAX6324GUT29+T datasheet page 2.
Is MAX6324GUT29+T qualified for automotive applications?
While MAX6324GUT29+T itself is not explicitly marked /V (AEC-Q100), its datasheet confirms operation from -40°C to +125°C and references AEC-Q100-qualified variants like MAX6324HUT44/V+T. The MAX6324GUT29+T shares identical process, testing, and qualification data - widely deployed in automotive ECU designs per Maxim's application notes and distributor stocking programs.
How does the open-drain RESET output of MAX6324GUT29+T interface with bidirectional microcontroller reset pins?
The open-drain RESET output of MAX6324GUT29+T connects directly to bidirectional µP reset pins (e.g., Motorola 68HC11) using a single external pullup resistor. This allows either the MAX6324GUT29+T or the µP to assert reset - confirmed in Figure 7 and Applications Information section of the MAX6324GUT29+T datasheet.
MAX6324GUT29+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
MAX6324GUT29+T FAQ
1.How can I place an order for MAX6324GUT29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6324GUT29+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 MAX6324GUT29+T reliable?
The price and inventory of MAX6324GUT29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6324GUT29+T is usually 5 days.
3.What payment methods are accepted for MAX6324GUT29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6324GUT29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6324GUT29+T?
MAX6324GUT29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6324GUT29+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 MAX6324GUT29+T?
For technical support, including MAX6324GUT29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6324GUT29+T requirements.
6.How does Aetrix verify that MAX6324GUT29+T is sourced from the original manufacturer or authorized distributors?
All MAX6324GUT29+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 MAX6324GUT29+T meets industry standards.
7.What is the process for return or replacement of MAX6324GUT29+T?
All MAX6324GUT29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6324GUT29+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 MAX6324GUT29+T part is unused and in its original packaging.
Return procedure for MAX6324GUT29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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