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Analog Devices Inc./Maxim Integrated MAX6323CUT29+
- Part No.:
- MAX6323CUT29+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323CUT29+.pdf
- Description:
- MAX6323 MICROPROCESSOR SUPERVISO
- Quantity:
- Payment:
- Shipping:
Inventory:2,747
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Product details
Overview
MAX6323CUT29+ from Maxim Integrated is a microprocessor supervisory circuit with windowed (min/max) watchdog, precision reset monitoring at 2.93V ±2.5%, push-pull active-low RESET output, and guaranteed operation down to VCC = +1.2V. It monitors power integrity and processor timing in automotive engine control units, industrial PLCs, and medical infusion pumps.
For engineers reviewing the MAX6323CUT29+ datasheet, MAX6323CUT29+ pinout, MAX6323CUT29+ application, or MAX6323CUT29+ equivalent, key selection criteria include its factory-trimmed 300ms/450ms slow/fast watchdog timeout window, 23µA typical supply current, -40°C to +125°C extended temperature range, and SOT23-6 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6323CUT29+ implements a dual-threshold watchdog that detects both fast faults (WDI falling edges <10ms apart) and slow faults (no WDI edge >300ms), with WDPO pulsed low for 1ms upon fault detection. Its reset comparator guarantees valid RESET assertion down to VCC = +1.2V, enabling reliable brownout recovery in low-voltage systems.
It features a debounced manual reset input (MR) with 1µs minimum pulse width and 100ns glitch immunity, internally pulled up to VCC. The push-pull RESET output drives logic directly without external pullup, supporting interface with microcontrollers requiring active-low reset signals with defined voltage levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% - precisely monitors +3.3V rails with margin for tolerance and drift |
| Watchdog Slow Timeout | 300ms (min) / 450ms (max) - defines maximum allowable interval between WDI pulses |
| Watchdog Fast Timeout | 10ms (min) / 15ms (max) - defines minimum allowable interval between WDI pulses |
| Supply Current | 23µA typical - enables always-on supervision in battery-backed or low-power systems |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial ambient environments |
| Reset Timeout Delay | 100ms minimum - ensures stable µP initialization after power-up or brownout recovery |
| VCC Range | 1.2V to 5.5V - supports operation during deep brownout and across multiple supply domains |
Pinout & Package
MAX6323CUT29+ is housed in a 6-pin SOT23 package (package code U6-1), footprint-compatible with industry-standard 0.95mm pitch land pattern 90-0175. The device uses BiCMOS process technology and contains 1371 transistors.
| 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 |
| 2 GND | Ground reference | Return path for all internal circuits; requires low-impedance connection to system ground plane |
| 3 WDI | Watchdog input | Falling-edge-triggered; resets internal timer; 300ns min pulse width; 100ns glitch immunity |
| 4 VCC | Supply voltage input | Monitored rail; bypass with ≥500pF capacitor near pin for noise immunity |
| 5 WDPO | Open-drain watchdog pulse output | Pulses low for 1ms on fast/slow fault; only active when RESET is high; requires external pullup |
| 6 RESET | Active-low push-pull reset output | Asserted when VCC < 2.93V or MR low; held for ≥100ms after recovery; drives CMOS loads directly |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog | Dual-threshold timing detection prevents false resets from transient software stalls or clock jitter |
| Factory-trimmed thresholds | 2.93V reset and 10ms/300ms watchdog windows laser-trimmed for ±2.5% accuracy over temperature |
| Low-voltage reset validity | RESET remains functional down to VCC = +1.2V, ensuring deterministic behavior during deep brownout |
| Debounced MR input | No external RC network required; internal filtering rejects 100ns noise spikes on manual reset line |
| Push-pull RESET output | Eliminates need for external pullup resistor; provides defined logic-low and logic-high states |
Applications
| Engine Control Unit (ECU) | Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply and validates real-time instruction execution in diesel injection timing systems. IC Role / Device Role / Timing Role: Supervisory circuit providing power-on reset, brownout detection, and windowed watchdog supervision of main MCU. Use Value: Prevents unsafe fuel delivery due to software lockup by forcing hard reset within 300ms of missed WDI pulse. |
Use Scenario: Ensures deterministic startup and runtime integrity of ARM-based control firmware in factory automation I/O modules. IC Role / Device Role / Timing Role: System-level supervisor coordinating power sequencing, reset assertion, and watchdog fault signaling to safety controller. Use Value: Guarantees 100ms minimum reset hold time after 3.3V rail stabilization, eliminating race conditions during FPGA configuration. |
| Infusion Pump Controller | Industrial Motor Drive HMI |
Use Scenario: Validates continuous operation of safety-critical dosing algorithm running on low-power Cortex-M0+ in battery-operated medical devices. IC Role / Device Role / Timing Role: Fault-detection node asserting watchdog pulse (WDPO) on timing violation, triggering NMI-driven error logging before full reset. Use Value: Enables diagnostic data capture prior to restart using 1ms WDPO pulse to interrupt CPU without losing RAM context. |
Use Scenario: Supervises 5V logic supply and GUI processor activity in touch-screen HMIs exposed to EMI in motor control cabinets. IC Role / Device Role / Timing Role: Dual-role supervisor: VCC monitor for brownout protection and windowed watchdog for UI task scheduler validation. Use Value: Maintains 23µA quiescent current to extend backup battery life while detecting both stuck-loop and hung-task failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324CUT29+ | 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 supply domains | Select MAX6324CUT29+ only if open-drain reset is needed; otherwise MAX6323CUT29+ simplifies layout with no pullup resistor |
| TPS3808G33DBVR | Fixed 3.3V reset threshold; single-window watchdog (no min/max detection); 35µA supply current | Lacks windowed watchdog capability; suitable only for basic power-monitoring without timing validation | Choose TPS3808G33DBVR only for cost-sensitive non-safety applications where fast/slow fault discrimination is unnecessary |
Compared with MAX6324CUT29+, the MAX6323CUT29+ offers direct-drive reset capability without external components, while TPS3808G33DBVR trades windowed watchdog functionality for lower unit cost and simpler timing architecture-neither provides the same combination of precision 2.93V monitoring, dual-threshold fault detection, and guaranteed sub-1.2V reset validity.
Availability
MAX6323CUT29+ is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and medical infusion pump designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6323CUT29+ 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 supervision.
The MAX6323/MAX6324 family delivers robust µP supervision with windowed watchdog functionality specifically for safety-critical embedded systems where deterministic fault detection and low-voltage reset validity are mandatory.
FAQ
What is the exact reset threshold voltage of MAX6323CUT29+ and how is it trimmed?
The MAX6323CUT29+ has a nominal reset threshold of 2.93V with ±2.5% accuracy over -40°C to +125°C, achieved via laser trimming during manufacturing. This value corresponds to the "29" suffix in the part number and is validated per the Reset Threshold Range table in the datasheet, with min/max limits of 2.85V and 3.00V respectively.
Does MAX6323CUT29+ support windowed watchdog functionality, and what are its timeout values?
Yes, MAX6323CUT29+ implements true windowed (min/max) watchdog supervision. Its factory-trimmed timeouts are 10ms (min) / 15ms (max) for fast faults and 300ms (min) / 450ms (max) for slow faults, as specified for the "C" watchdog suffix in the Watchdog Timeout table.
Can MAX6323CUT29+ operate reliably when VCC drops below 2.0V?
Yes, MAX6323CUT29+ guarantees valid RESET output down to VCC = +1.2V, making it suitable for deep brownout scenarios. Below +1.2V, the RESET output becomes high-impedance, but the device continues to monitor and assert RESET as long as VCC remains ≥1.2V.
What is the function of the WDPO pin on MAX6323CUT29+, and how is it used?
The WDPO pin on MAX6323CUT29+ is an open-drain watchdog pulse output that asserts low for 1ms upon detection of either a fast or slow watchdog fault. It operates independently of RESET and requires an external pullup resistor; it is commonly routed to an NMI input for diagnostic logging before full system reset.
Is MAX6323CUT29+ qualified for automotive applications, and what packaging does it use?
MAX6323CUT29+ is not explicitly AEC-Q100 qualified (that status applies to variants like MAX6324HUT44/V+T), but it operates over -40°C to +125°C and is supplied in lead-free 6-pin SOT23 (U6-1) packaging with RoHS-compliant finish, supporting automotive-grade thermal and reliability requirements in non-safety-critical subsystems.
MAX6323CUT29+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Watchdog Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6323CUT29+ FAQ
1.How can I place an order for MAX6323CUT29+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323CUT29+ 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 MAX6323CUT29+ reliable?
The price and inventory of MAX6323CUT29+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323CUT29+ is usually 5 days.
3.What payment methods are accepted for MAX6323CUT29+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323CUT29+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323CUT29+?
MAX6323CUT29+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323CUT29+ 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 MAX6323CUT29+?
For technical support, including MAX6323CUT29+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323CUT29+ requirements.
6.How does Aetrix verify that MAX6323CUT29+ is sourced from the original manufacturer or authorized distributors?
All MAX6323CUT29+ 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 MAX6323CUT29+ meets industry standards.
7.What is the process for return or replacement of MAX6323CUT29+?
All MAX6323CUT29+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323CUT29+, 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 MAX6323CUT29+ part is unused and in its original packaging.
Return procedure for MAX6323CUT29+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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