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Analog Devices Inc./Maxim Integrated MAX6323FUT29-T
- Part No.:
- MAX6323FUT29-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323FUT29-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,863
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Product details
Overview
MAX6323FUT29-T from Maxim Integrated is a microprocessor supervisory circuit with windowed (min/max) watchdog, precision reset threshold of 2.93V ±2.5%, push-pull RESET output, and guaranteed operation down to VCC = +1.2V. It monitors +3.3V supply rails in automotive engine control units, industrial PLCs, and medical infusion pumps where deterministic fault detection and brownout immunity are critical.
For engineers reviewing the MAX6323FUT29-T datasheet, MAX6323FUT29-T pinout, MAX6323FUT29-T application, or MAX6323FUT29-T equivalent, key selection criteria include its factory-trimmed 39ms/82ms watchdog timeout window, 23µA typical supply current, -40°C to +125°C operating range, and SOT23-6 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6323FUT29-T implements a dual-threshold watchdog that detects both fast faults (WDI falling edges <39ms apart) and slow faults (no WDI edge >82ms), using internal laser-trimmed timing with ±20% accuracy over temperature. Its VCC monitor uses a precision bandgap reference to guarantee reset assertion at 2.85V–3.00V across -40°C to +125°C.
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. MR input includes internal 50kΩ pullup and 100ns glitch immunity, enabling direct switch connection without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% - ensures reliable power-on reset for +3.3V systems with margin against supply ripple |
| Watchdog Timeout (Fast/Slow) | 39ms / 82ms - factory-laser-trimmed window enables precise software execution timing validation |
| Supply Current | 23µA typ - 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 industrial motor drive environments |
| RESET Output Type | Push-pull - eliminates need for external pullup resistor, simplifying PCB layout and reducing BOM count |
| VCC Range | 1.2V to 5.5V - guarantees valid RESET assertion even during deep brownout conditions |
| Reset Timeout Delay | 100ms min - provides sufficient hold time for microcontroller initialization sequences |
Pinout & Package
MAX6323FUT29-T is housed in a 6-pin SOT23 package (package code U6+1A, outline 21-0058), with 1.3mm × 2.2mm footprint and 0.95mm height, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-low manual reset input | Internally pulled up; asserts RESET and clears watchdog timer when low; 1µs minimum pulse width required |
| 2 (GND) | Ground reference | Common return path for all internal circuits; must be connected to system ground plane |
| 3 (WDI) | Watchdog input | Falling-edge-triggered; resets internal timer; requires ≥300ns pulse width and rejects <100ns glitches |
| 4 (VCC) | Supply voltage input | Powers device and serves as monitored rail; bypass with ≥500pF 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 supply |
| 6 (RESET) | Active-low push-pull reset output | Asserts low when VCC <2.85V or MR low; holds low ≥100ms after recovery; no external pullup needed |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog timer | Detects both premature and delayed WDI pulses (39ms/82ms window), preventing false resets from jitter while catching hung code |
| Laser-trimmed reset threshold | 2.93V ±2.5% tolerance ensures accurate +3.3V rail monitoring without calibration overhead |
| Guaranteed reset validity to 1.2V | Enables fail-safe behavior during deep brownout-RESET remains asserted until VCC recovers sufficiently |
| Debounced manual reset input | Internal 50kΩ pullup and 100ns glitch rejection allow direct switch interface without RC networks |
| Low quiescent current | 23µA typical ICC supports always-on supervision in energy-sensitive applications like portable medical devices |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply and validates firmware execution timing in diesel injection control modules. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout detection, and windowed watchdog fault signaling via WDPO pulse. Use Value: Prevents unsafe actuator commands during processor lockup by forcing ECU reset within 100ms of watchdog timeout detection. | Use Scenario: Ensures deterministic startup and runtime integrity of ARM-based logic controllers in factory automation cabinets. IC Role / Device Role / Timing Role: System-level supervisor asserting RESET during 3.3V rail instability and pulsing WDPO on software timing violations. Use Value: Eliminates need for external reset supervisor ICs, reducing component count while maintaining AEC-Q100-aligned reliability. |
| Medical Infusion Pump Controller | Rail-Switching Power Supply Monitor |
Use Scenario: Guarantees safe shutdown and restart of pump motor drivers when main 3.3V logic supply dips below 2.85V. IC Role / Device Role / Timing Role: Precision reset generator with push-pull output driving microcontroller RESET pin directly. Use Value: Maintains regulatory compliance (IEC 62304) by ensuring no undefined state during power transients, with validated 100ms reset hold time. | Use Scenario: Validates correct sequencing of multiple DC-DC outputs in telecom power modules before enabling downstream loads. IC Role / Device Role / Timing Role: Dual-function supervisor monitoring primary 3.3V rail while using WDPO to flag timing errors in sequencer feedback loops. Use Value: Detects misconfigured or failed power sequencing without requiring FPGA-based logic, lowering system cost and complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324FUT29-T | Open-drain RESET output instead of push-pull; identical watchdog timing and reset threshold | Required when interfacing with bidirectional µP reset pins or level-shifting across multiple supply domains | Select MAX6324FUT29-T only if open-drain functionality is explicitly needed for system-level reset arbitration |
| TPS3808G33DBVR | Fixed 3.3V reset threshold (±0.5%), no windowed watchdog; 35µA supply current; SOT23-6 package | Suitable for basic power-monitoring-only applications without software execution validation requirements | Choose TPS3808G33DBVR when watchdog functionality is unnecessary and tighter reset threshold tolerance is prioritized |
Compared with MAX6324FUT29-T, the MAX6323FUT29-T eliminates external pullup components and simplifies reset net routing; versus TPS3808G33DBVR, it adds critical windowed watchdog capability for safety-critical firmware validation but trades off tighter reset accuracy.
Availability
MAX6323FUT29-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 MAX6323FUT29-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 microprocessor supervision with windowed watchdog functionality specifically for safety-critical embedded systems where deterministic fault detection and wide-temperature operation are mandatory.
FAQ
What is the exact reset threshold voltage of MAX6323FUT29-T and how is it trimmed?
The MAX6323FUT29-T has a nominal reset threshold of 2.93V with ±2.5% accuracy over -40°C to +125°C, achieved through factory laser trimming of six available thresholds. This value is confirmed in the Electrical Characteristics table (VTH = 2.85V to 3.00V) and applies specifically to the "29" suffix variant, not other UT-coded versions.
Does MAX6323FUT29-T support windowed watchdog functionality, and what are its timeout values?
Yes, MAX6323FUT29-T implements a true min/max windowed watchdog. The "F" suffix denotes fast timeout of 39ms (min) and slow timeout of 82ms (max), measured from falling edge to falling edge on WDI. These values are laser-trimmed and specified in the Watchdog Timeout table for MAX632_FUT_ _ variants.
What is the RESET output configuration of MAX6323FUT29-T, and how does it differ from MAX6324FUT29-T?
MAX6323FUT29-T features a push-pull RESET output, eliminating the need for an external pullup resistor. In contrast, MAX6324FUT29-T uses an open-drain RESET output requiring external pullup. This distinction is explicit in the Ordering Information table and Pin Description section for the MAX6323 series.
Can MAX6323FUT29-T operate reliably at VCC = 1.2V, and what happens to RESET below this voltage?
Yes, MAX6323FUT29-T guarantees valid RESET assertion down to VCC = +1.2V. Below this voltage, the RESET output becomes high-impedance (open circuit) and no longer sinks current. This behavior is documented in the General Description and Applications Information sections, confirming functional operation through deep brownout conditions.
What package type and footprint does MAX6323FUT29-T use, and are land patterns available?
MAX6323FUT29-T uses a 6-pin SOT23 package (outline number 21-0058, land pattern 90-0175). The package code is U6+1A, with dimensions of 1.3mm × 2.2mm × 0.95mm. Official land patterns and thermal data are published on maximintegrated.com/packages, confirming compatibility with standard SOT23-6 assembly processes.
MAX6323FUT29-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:
- 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
MAX6323FUT29-T FAQ
1.How can I place an order for MAX6323FUT29-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323FUT29-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 MAX6323FUT29-T reliable?
The price and inventory of MAX6323FUT29-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323FUT29-T is usually 5 days.
3.What payment methods are accepted for MAX6323FUT29-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323FUT29-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323FUT29-T?
MAX6323FUT29-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323FUT29-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 MAX6323FUT29-T?
For technical support, including MAX6323FUT29-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323FUT29-T requirements.
6.How does Aetrix verify that MAX6323FUT29-T is sourced from the original manufacturer or authorized distributors?
All MAX6323FUT29-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 MAX6323FUT29-T meets industry standards.
7.What is the process for return or replacement of MAX6323FUT29-T?
All MAX6323FUT29-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323FUT29-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 MAX6323FUT29-T part is unused and in its original packaging.
Return procedure for MAX6323FUT29-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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