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Analog Devices Inc./Maxim Integrated MAX6324DUT29-T
- Part No.:
- MAX6324DUT29-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6324DUT29-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,191
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Product details
Overview
MAX6324DUT29-T from Maxim Integrated is a microprocessor supervisory IC with windowed (min/max) watchdog, open-drain RESET output, and factory-trimmed 2.93V reset threshold (±2.5% accuracy), guaranteed valid down to VCC = +1.2V. It monitors +2.5V/+3.3V systems, asserts RESET on power failure or manual reset, and pulses WDPO for watchdog faults in automotive and industrial control applications.
For engineers reviewing the MAX6324DUT29-T datasheet, MAX6324DUT29-T pinout, MAX6324DUT29-T application, or MAX6324DUT29-T equivalent, key selection criteria include its 15ms fast / 10s slow watchdog timeout window (D-suffix), open-drain RESET compatibility with bidirectional μP reset pins, and AEC-Q100-qualified variants for automotive use.
Technical Context
The MAX6324DUT29-T implements a dual-threshold windowed watchdog timer: it detects both fast faults (WDI falling edges <15ms apart) and slow faults (no WDI edge >10s), with WDPO pulsed low for 1ms upon fault detection. Its internal reset comparator guarantees valid RESET assertion down to VCC = +1.2V, supporting brownout recovery in low-voltage embedded systems.
It features a debounced manual reset input (MR) with 1μs minimum pulse width and 100ns glitch immunity, and uses laser-trimmed thresholds for ±2.5% accuracy across –40°C to +125°C. The open-drain RESET output requires an external pullup and supports level-shifting across multiple supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V nominal (2.85V–3.00V range), ±2.5% accuracy over temperature - ensures precise brownout detection for 3.0V/3.3V rails |
| Watchdog Fast Timeout | 15ms (min), factory-trimmed D-suffix - rejects spurious WDI pulses while detecting stuck-loop execution |
| Watchdog Slow Timeout | 10s (max), D-suffix - detects prolonged processor hang or clock failure in safety-critical systems |
| RESET Assertion Delay | ≥100ms after VCC rise & MR deassertion - provides stable reset hold time for μP initialization |
| Supply Current | 23µA typical at 3.3V - enables always-on monitoring in battery-backed or low-power industrial nodes |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and harsh industrial environments |
| VCC Range | 1.2V to 5.5V - supports operation during deep brownout and ensures RESET validity even near power collapse |
Pinout & Package
MAX6324DUT29-T is housed in a 6-pin SOT23 package (package code U6+1A, outline 21-0058), surface-mount compatible with standard reflow profiles including lead-free (+260°C).
| 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 min pulse width required |
| 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 timer; 300ns min pulse width; 100ns glitch immunity |
| 4 - VCC | Supply voltage input | Monitored rail; powers device; absolute max 6.0V; operates down to 1.2V with valid RESET |
| 5 - WDPO | Open-drain watchdog pulse output | Pulses low for 1ms on fast/slow fault; requires external pullup; active only when RESET is high |
| 6 - RESET | Active-low open-drain reset output | Asserted on VCC drop below 2.93V or MR low; requires external pullup; interfaces with bidirectional μP reset pins |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog timer | Dual-threshold detection (15ms fast / 10s slow) prevents false resets from transient noise while catching both stuck and stalled code |
| Laser-trimmed precision reset | 2.93V threshold with ±2.5% tolerance over –40°C to +125°C - eliminates external resistor networks for accurate 3.0V/3.3V rail monitoring |
| Open-drain RESET & WDPO | Enables level-shifting across supply domains and direct connection to bidirectional μP reset pins (e.g., Motorola 68HC11) without logic conflicts |
| Guaranteed RESET down to VCC = +1.2V | Ensures deterministic system state during brownout recovery - critical for nonvolatile memory write integrity and safe shutdown sequences |
| Debounced MR input | Internal pullup and 100ns glitch rejection allow direct switch connection without external RC network - reduces BOM count and board space |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply and software execution in engine management systems subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout detection, and windowed watchdog supervision of main ECU μP. Use Value: Prevents unsafe operation due to hung firmware by triggering WDPO pulse → MR loopback → full 100ms reset, ensuring deterministic restart after fault. |
Use Scenario: Ensures reliable startup and runtime supervision of programmable logic controller modules operating in factory-floor environments with EMI and voltage sags. IC Role / Device Role / Timing Role: System-level supervisor asserting RESET on 3.3V rail collapse and pulsing WDPO for watchdog timeout events. Use Value: 10s slow timeout detects extended processor hangs; open-drain RESET allows shared reset bus across multiple I/O submodules powered from different rails. |
| Medical Infusion Pump Controller | Smart Grid Communication Node |
Use Scenario: Guarantees fail-safe behavior in battery-powered infusion pumps where software errors could cause dangerous over-delivery. IC Role / Device Role / Timing Role: Safety-critical watchdog and reset supervisor interfacing with ARM Cortex-M μP via bidirectional reset pin. Use Value: WDPO-to-MR loopback forces full hardware reset on fault, clearing corrupted RAM and restoring calibrated delivery state - meeting IEC 62304 requirements. |
Use Scenario: Supervises communication processors in outdoor smart meter gateways exposed to wide temperature swings and grid transients. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors 2.5V/3.3V domain and validates μP activity via WDI signal from real-time scheduler. Use Value: 15ms fast timeout catches scheduler jitter or interrupt latency issues; ±2.5% reset accuracy ensures consistent brownout response across -40°C to +125°C operating range. |
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 timeout - narrower timing window than D-suffix | Better suited for applications requiring faster fault detection (e.g., real-time motor control), less tolerant of long software loops | Select MAX6324HUT29-T if system software has tighter execution timing constraints and requires sub-second watchdog response. |
| TPS3808G33DBVR | Fixed 3.08V reset threshold (±0.5%), no windowed watchdog - only basic power-on/brownout reset and simple watchdog | Lacks min/max watchdog; suitable for cost-sensitive designs where only single-threshold reset and basic timeout are needed | Choose TPS3808G33DBVR for simpler systems without need for dual-threshold fault discrimination - lower cost, smaller footprint. |
Compared with MAX6324HUT29-T and TPS3808G33DBVR, the MAX6324DUT29-T uniquely balances long-interval fault detection (10s slow timeout) with robust noise immunity, making it optimal for applications where extended software hangs must be distinguished from transient glitches without sacrificing brownout precision.
Availability
MAX6324DUT29-T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and smart grid communication nodes requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6324DUT29-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, emphasizing reliability, accuracy, and thermal robustness.
The MAX6324DUT29-T belongs to the MAX6323/MAX6324 family of μP supervisory circuits engineered specifically for safety-critical embedded systems requiring windowed watchdog supervision and guaranteed reset validity down to 1.2V.
FAQ
What is the exact reset threshold voltage of MAX6324DUT29-T and how is it trimmed?
The MAX6324DUT29-T has a nominal reset threshold of 2.93V, with a guaranteed range of 2.85V to 3.00V (±2.5% accuracy) over –40°C to +125°C. This value is set by factory laser trimming of on-chip resistors, eliminating the need for external components and ensuring consistent performance across temperature and voltage variations in the MAX6324DUT29-T.
How does the windowed watchdog function in MAX6324DUT29-T differ from a standard watchdog timer?
The MAX6324DUT29-T implements a true windowed (min/max) watchdog: it triggers WDPO on both fast faults (WDI falling edges <15ms apart) and slow faults (no WDI edge >10s). Unlike standard single-timer watchdogs, this prevents false timeouts from transient noise while reliably catching both stuck and excessively delayed code execution - a core capability of the MAX6324DUT29-T.
Can MAX6324DUT29-T drive a microcontroller reset pin that is bidirectional, such as on the Motorola 68HC11?
Yes. The MAX6324DUT29-T's open-drain RESET output is explicitly designed for bidirectional μP reset pins. By connecting a single pullup resistor between RESET and the μP's supply rail, either the MAX6324DUT29-T or the μP can assert reset - enabling coordinated system recovery without additional logic. This interoperability is a documented feature of the MAX6324DUT29-T.
What is the minimum VCC voltage at which MAX6324DUT29-T guarantees valid RESET assertion?
The MAX6324DUT29-T guarantees valid RESET output down to VCC = +1.2V. Below this voltage, the internal circuitry cannot sink current reliably, but above it - including during brownout recovery - RESET remains asserted with defined logic levels. This specification ensures deterministic behavior during critical low-voltage transitions in the MAX6324DUT29-T.
Does MAX6324DUT29-T require external passive components for basic operation?
Yes - the MAX6324DUT29-T requires two external components for reliable operation: a ≥500pF bypass capacitor on VCC to suppress supply noise, and a pullup resistor on the open-drain RESET pin (typically 10kΩ). WDPO also requires a pullup for active-low pulse signaling. These are mandatory design requirements specified in the MAX6324DUT29-T datasheet, not optional enhancements.
MAX6324DUT29-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
MAX6324DUT29-T FAQ
1.How can I place an order for MAX6324DUT29-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6324DUT29-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 MAX6324DUT29-T reliable?
The price and inventory of MAX6324DUT29-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6324DUT29-T is usually 5 days.
3.What payment methods are accepted for MAX6324DUT29-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6324DUT29-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6324DUT29-T?
MAX6324DUT29-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6324DUT29-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 MAX6324DUT29-T?
For technical support, including MAX6324DUT29-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6324DUT29-T requirements.
6.How does Aetrix verify that MAX6324DUT29-T is sourced from the original manufacturer or authorized distributors?
All MAX6324DUT29-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 MAX6324DUT29-T meets industry standards.
7.What is the process for return or replacement of MAX6324DUT29-T?
All MAX6324DUT29-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6324DUT29-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 MAX6324DUT29-T part is unused and in its original packaging.
Return procedure for MAX6324DUT29-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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