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Analog Devices Inc./Maxim Integrated MAX6323HUT29+T
- Part No.:
- MAX6323HUT29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323HUT29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,141
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Product details
Overview
MAX6323HUT29+T from Maxim Integrated is a microprocessor supervisory IC with windowed (min/max) watchdog, push-pull RESET output, and factory-trimmed 2.93V reset threshold (±2.5% accuracy). It monitors VCC from +1.2V to +5.5V, asserts RESET for ≥100ms after power-up, and operates across -40°C to +125°C in automotive and industrial control systems.
For engineers reviewing the MAX6323HUT29+T datasheet, MAX6323HUT29+T pinout, MAX6323HUT29+T application, or MAX6323HUT29+T equivalent, key selection criteria include its guaranteed RESET validity down to VCC = +1.2V, 1ms WDPO fault pulse width, laser-trimmed 719ms fast timeout / 1.3s slow timeout (H-window), debounced MR input, and SOT23-6 packaging for space-constrained embedded designs.
Technical Context
The MAX6323HUT29+T implements a dual-threshold watchdog that detects both fast faults (WDI falling edges <719ms apart) and slow faults (no WDI edge >1.3s), independent of the VCC reset function. Its internal BiCMOS circuitry enables low 23µA typical supply current and precise timing stability over temperature.
RESET is push-pull active-low with VOH ≥0.8×VCC (ISOURCE = 500µA) and VOL ≤0.4V (ISINK = 1.2mA), while WDPO is open-drain pulsed low for 1ms on fault detection. The MR input features internal 50–85kΩ pullup, 1µs minimum pulse width, and 100ns glitch immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% - precisely matches +3.0V supply monitoring with brownout margin |
| Watchdog Fast Timeout | 719ms (min) - detects premature WDI pulses in long-loop firmware execution |
| Watchdog Slow Timeout | 1.3s (min) - identifies stalled or hung processor states beyond safe operational window |
| RESET Assertion Delay | ≥100ms after VCC rise - ensures stable µP initialization before release |
| Supply Current | 23µA typ at 3V - enables always-on supervision in battery-backed or low-power systems |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and harsh industrial environments |
| VCC Range | 1.2V to 5.5V - guarantees valid RESET assertion even during deep brownout conditions |
Pinout & Package
MAX6323HUT29+T is housed in a 6-pin SOT23 package (package code U6+1A, outline 21-0058), optimized for high-density PCB layouts and reflow-compatible lead-free assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-Low Manual Reset Input | Internally pulled up; asserts RESET and clears watchdog timer when driven low ≥1µs |
| 2 (GND) | Ground Reference | Return path for all internal circuits; must be low-impedance connection to system ground plane |
| 3 (WDI) | Watchdog Input | Falling-edge-triggered; resets internal timer and disables WDPO fault detection during RESET/WDPO assertion |
| 4 (VCC) | Supply Voltage Input | Monitored for reset generation; requires ≥500pF bypass capacitor for noise immunity |
| 5 (WDPO) | Open-Drain Watchdog Pulse Output | Pulses low for 1ms on fast/slow fault detection; requires external pullup to ≤+6V |
| 6 (RESET) | Push-Pull Active-Low Reset Output | Drives low during VCC brownout or MR assertion; no external pullup required |
Key Features
| Feature | Design Value |
|---|---|
| Windowed Watchdog | Dual-threshold detection (fast + slow) prevents false resets from transient code delays or clock jitter |
| Laser-Trimmed Accuracy | ±2.5% reset threshold tolerance ensures reliable +3.0V supply monitoring without calibration overhead |
| Guaranteed Low-VCC Operation | Valid RESET assertion down to VCC = +1.2V avoids undefined µP behavior during deep brownout recovery |
| Debounced Manual Reset | Integrated MR filtering eliminates need for external RC network or Schmitt-trigger components |
| Low-Power Supervision | 23µA typical ICC enables continuous monitoring in energy-sensitive applications like telematics or sensor nodes |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply and software execution in engine management firmware. IC Role / Device Role / Timing Role: Windowed watchdog detects both stuck loops (slow fault) and spurious interrupts (fast fault); RESET ensures clean µP restart after brownout. Use Value: Prevents unsafe ECU operation by forcing reset when firmware deviates from expected timing window, meeting ASIL-B functional safety requirements. | Use Scenario: Supervises field-programmable gate array (FPGA) configuration and real-time control logic in modular I/O subsystems. IC Role / Device Role / Timing Role: Push-pull RESET drives FPGA PROG_B line directly; WDPO pulses trigger diagnostic logging via NMI interrupt on fault detection. Use Value: Enables deterministic recovery from corrupted FPGA bitstreams or timing violations without requiring host CPU intervention. |
| Medical Infusion Pump Controller | Railway Signaling Interface Board |
Use Scenario: Ensures fail-safe operation of ARM-based pump controller managing motor actuation and pressure sensing. IC Role / Device Role / Timing Role: MR input accepts hardware emergency stop signal; 2.93V threshold aligns with isolated 3.3V logic rail; WDPO alerts safety MCU of timing anomalies. Use Value: Guarantees immediate shutdown and restart upon detected software hang, satisfying IEC 62304 Class C software safety requirements. | Use Scenario: Provides redundant supervision for dual-core safety-critical processors in track-side signaling logic. IC Role / Device Role / Timing Role: Dual watchdog windows validate synchronized execution across cores; RESET output interfaces with hot-swap controllers for graceful power sequencing. Use Value: Supports SIL-4 compliance by detecting asymmetric core divergence and initiating controlled de-energization of output relays. |
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 | Open-drain RESET output instead of push-pull; identical watchdog, reset threshold, and timing specs | Required when interfacing with bidirectional µP reset pins or level-shifting across multiple supply domains | Select MAX6324HUT29+T only if open-drain RESET is needed for bus sharing or voltage translation. |
| TPS3808G33DBVR | Fixed 3.3V reset threshold (not 2.93V); no windowed watchdog - only simple timeout watchdog | Suitable for basic power-on reset where software timing validation is handled externally | Choose TPS3808G33DBVR only for cost-sensitive non-safety applications lacking min/max watchdog requirements. |
Compared with MAX6324HUT29+T, the MAX6323HUT29+T provides direct-drive RESET capability without external pullup, simplifying layout; versus TPS3808G33DBVR, it delivers superior fault coverage via dual-threshold watchdog but at higher BOM cost and design complexity.
Availability
MAX6323HUT29+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6323HUT29+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.
The MAX6323/MAX6324 product line delivers robust µP supervision with windowed watchdog functionality specifically engineered for safety-critical embedded systems where deterministic fault detection and recovery are mandatory.
FAQ
What is the exact reset threshold voltage of MAX6323HUT29+T?
The MAX6323HUT29+T has a factory-laser-trimmed nominal reset threshold of 2.93V with ±2.5% accuracy over -40°C to +125°C. This value is confirmed in the Electrical Characteristics table (VTH = 2.85V to 3.00V min/max) and corresponds to the "29" suffix in the part number per Maxim's ordering guide.
Does MAX6323HUT29+T support windowed watchdog functionality?
Yes, MAX6323HUT29+T implements true min/max (windowed) watchdog detection. With the "H" suffix, it provides a fast timeout of 719ms (min) and slow timeout of 1.3s (min), enabling detection of both premature and delayed WDI pulses - a key differentiator from single-threshold watchdog ICs.
What is the RESET output type of MAX6323HUT29+T?
MAX6323HUT29+T features a push-pull active-low RESET output, eliminating the need for an external pullup resistor. This contrasts with the MAX6324 variant (open-drain RESET) and simplifies interface to most microcontrollers requiring direct-drive reset assertion.
Can MAX6323HUT29+T operate reliably below 2.0V supply voltage?
Yes, MAX6323HUT29+T guarantees valid RESET assertion down to VCC = +1.2V, as specified in the Absolute Maximum Ratings and Electrical Characteristics. This enables robust brownout detection in low-voltage systems such as battery-powered sensors or partially discharged backup rails.
What package and RoHS status does MAX6323HUT29+T use?
MAX6323HUT29+T is supplied in a 6-pin SOT23 package (outline 21-0058, land pattern 90-0175) with lead-free termination, indicated by the "+T" suffix. It complies with RoHS Directive 2011/65/EU and is compatible with standard Pb-free reflow profiles up to +260°C.
MAX6323HUT29+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:
- 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
MAX6323HUT29+T FAQ
1.How can I place an order for MAX6323HUT29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323HUT29+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 MAX6323HUT29+T reliable?
The price and inventory of MAX6323HUT29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323HUT29+T is usually 5 days.
3.What payment methods are accepted for MAX6323HUT29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323HUT29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323HUT29+T?
MAX6323HUT29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323HUT29+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 MAX6323HUT29+T?
For technical support, including MAX6323HUT29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323HUT29+T requirements.
6.How does Aetrix verify that MAX6323HUT29+T is sourced from the original manufacturer or authorized distributors?
All MAX6323HUT29+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 MAX6323HUT29+T meets industry standards.
7.What is the process for return or replacement of MAX6323HUT29+T?
All MAX6323HUT29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323HUT29+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 MAX6323HUT29+T part is unused and in its original packaging.
Return procedure for MAX6323HUT29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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