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Analog Devices Inc./Maxim Integrated MAX6323CUT46+T
- Part No.:
- MAX6323CUT46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323CUT46+T.pdf
- Description:
- IC SUPERVISOR 4.63V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,946
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Product details
Overview
MAX6323CUT46+T from Maxim Integrated is a push-pull-output microprocessor supervisory circuit with windowed (min/max) watchdog, 4.63V ±2.5% reset threshold, 300ms slow watchdog timeout, and guaranteed RESET validity down to VCC = +1.2V. It monitors +5.0V power rails in automotive engine control units, industrial PLCs, and medical infusion pumps.
For engineers reviewing the MAX6323CUT46+T datasheet, MAX6323CUT46+T pinout, MAX6323CUT46+T application, or MAX6323CUT46+T equivalent, key selection criteria include factory-trimmed 300ms slow watchdog window, 4.63V reset threshold accuracy, push-pull RESET output drive capability, and AEC-Q100-compatible operation from –40°C to +125°C.
Technical Context
The MAX6323CUT46+T implements a dual-window watchdog that detects both fast faults (WDI falling edges <15ms apart) and slow faults (no WDI edge >300ms), with WDPO pulsed low for 1ms upon fault detection. Its internal reset comparator guarantees valid active-low RESET assertion down to VCC = +1.2V, independent of supply decay rate.
It features debounced manual reset input (MR) with 1µs minimum pulse width and 100ns glitch immunity, plus a precision voltage monitor laser-trimmed to 4.63V nominal threshold (±2.5% over –40°C to +125°C). The push-pull RESET output drives logic loads directly without external pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% - ensures reliable brownout detection on +5.0V systems with margin against ripple and drift |
| Slow Watchdog Timeout | 300ms (typ) - factory-trimmed window for detecting software hangs in safety-critical loops |
| Fast Watchdog Timeout | 15ms (max) - detects runaway code execution with tight timing constraints |
| Supply Current | 23µA (typ at 3V) - enables always-on monitoring in battery-backed or low-power embedded systems |
| RESET Validity Range | VCC ≥ +1.2V - guarantees defined logic state during power-down sequences before MCU shutdown |
| Operating Temperature | –40°C to +125°C - supports under-hood automotive and industrial environments without derating |
| Reset Timeout Delay | 100ms (min) - provides sufficient hold time for full processor initialization after power-up or MR assertion |
Pinout & Package
MAX6323CUT46+T is housed in a 6-pin SOT23 package (package code U6+1A), with 1.6mm × 2.9mm footprint and 0.95mm height, suitable for space-constrained PCB layouts in automotive and industrial modules.
| 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; immune to 100ns glitches |
| 2 - GND | Ground reference | Common return path for all internal circuits; must be connected to system ground plane for noise immunity |
| 3 - WDI | Watchdog input | Falling-edge-triggered; resets internal timer window; requires ≥300ns pulse width and rejects sub-100ns noise |
| 4 - VCC | Supply voltage input | Monitored power rail (1.2V–5.5V); bypass with ≥500pF capacitor near pin to suppress transients |
| 5 - WDPO | Open-drain watchdog pulse output | Pulses low for 1ms on fast/slow fault detection; requires external pullup to ≤+6V; inactive while RESET is asserted |
| 6 - RESET | Active-low push-pull reset output | Drives CMOS/TTL loads directly; no external pullup needed; remains asserted ≥100ms after VCC/MR recovery |
Key Features
| Feature | Design Value |
|---|---|
| Windowed (min/max) watchdog | Detects both premature and delayed WDI pulses-critical for validating deterministic real-time software execution |
| Laser-trimmed 4.63V reset threshold | ±2.5% accuracy over full temperature range eliminates need for external resistor dividers in +5V systems |
| Push-pull RESET output | Eliminates external pullup resistor, reducing BOM count and layout complexity in high-volume automotive modules |
| Guaranteed RESET down to VCC = +1.2V | Ensures clean, monotonic reset deassertion during power ramp-down-prevents metastability in downstream logic |
| Debounced MR input with 100ns immunity | Enables direct switch connection without RC network, simplifying front-panel reset implementation in industrial HMI |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
|
Use Scenario: Monitors 5V supply and main MCU activity in diesel ECU during cold cranking and load dump events. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout protection, and windowed watchdog supervision of firmware execution. Use Value: Prevents unsafe operation due to undetected software lockups during transient voltage conditions common in 12V/24V vehicle electrical systems. |
Use Scenario: Ensures deterministic restart of ladder logic execution in DIN-rail mounted PLCs exposed to factory EMI and thermal cycling. IC Role / Device Role / Timing Role: System-level watchdog and reset supervisor with guaranteed timing behavior across –40°C to +125°C ambient. Use Value: Eliminates need for external timing components while meeting IEC 61131-2 requirements for safe controller reboot on fault detection. |
| Medical Infusion Pump Controller | Railway Signaling Interface Module |
|
Use Scenario: Validates continuous operation of ARM-based pump controller during battery backup mode and mains switchover. IC Role / Device Role / Timing Role: Safety-critical supervisory circuit enforcing strict 300ms watchdog window and 4.63V supply monitoring. Use Value: Supports Class II medical device certification by guaranteeing fail-safe reset assertion before VCC drops below MCU operational threshold. |
Use Scenario: Supervises FPGA-based signaling logic in trackside equipment operating in uncontrolled outdoor environments. IC Role / Device Role / Timing Role: High-reliability reset generator with extended temperature range and transient-immune MR input. Use Value: Meets EN 5012x railway standards via guaranteed 100ms reset timeout and 1.2V RESET validity during brownout recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324CUT46+T | Open-drain RESET output instead of push-pull; identical watchdog and reset thresholds | Required when interfacing with bidirectional MCU reset pins or level-shifting across multiple supply domains | Select MAX6324CUT46+T only if open-drain drive and external pullup are acceptable in your reset topology |
| TPS3808G33DBVR | Fixed 3.3V reset threshold; no windowed watchdog; 200ms reset timeout; 2.9µA quiescent current | Suitable for simpler, non-safety-critical 3.3V systems where min/max watchdog validation is not required | Choose TPS3808G33DBVR only for cost-sensitive, single-threshold applications lacking deterministic software timing requirements |
Compared with MAX6324CUT46+T and TPS3808G33DBVR, the MAX6323CUT46+T uniquely delivers push-pull drive, 4.63V precision reset, and 300ms windowed watchdog in one die-enabling robust fault detection without external components in +5V automotive and industrial control designs.
Availability
MAX6323CUT46+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 and long product lifecycles.
Supply support for MAX6323CUT46+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 family was engineered specifically for safety-critical embedded systems requiring deterministic watchdog supervision and accurate power-rail monitoring across harsh environmental conditions.
FAQ
What is the exact reset threshold voltage of MAX6323CUT46+T?
The MAX6323CUT46+T has a nominal reset threshold of 4.63V with ±2.5% accuracy over –40°C to +125°C, corresponding to the "46" suffix per Maxim's ordering convention. This value is laser-trimmed at wafer test and guaranteed in the Electrical Characteristics table under VTH for MAX632_ _UT46 variants.
Does MAX6323CUT46+T support windowed watchdog functionality?
Yes, MAX6323CUT46+T implements a true min/max (windowed) watchdog: it detects fast faults (WDI falling edges <15ms apart) and slow faults (no WDI edge >300ms), as specified in the Watchdog Timeout table for "CUT" suffix devices. WDPO pulses low for 1ms on either fault type.
What is the function of the MR pin on MAX6323CUT46+T?
The MR (Manual Reset) pin on MAX6323CUT46+T is an active-low input that forces RESET assertion and clears the internal watchdog timer when pulled low. It features internal pullup, 1µs minimum pulse width requirement, and 100ns glitch immunity-allowing direct switch connection without external components.
Can MAX6323CUT46+T operate down to 1.2V supply voltage?
Yes, MAX6323CUT46+T guarantees valid active-low RESET output down to VCC = +1.2V, meaning the output remains logically defined and capable of driving downstream logic even as the supply decays. Below +1.2V, RESET becomes high-impedance.
What package type and footprint does MAX6323CUT46+T use?
MAX6323CUT46+T uses a 6-pin SOT23 package (outline 21-0058, land pattern 90-0175), measuring 1.6mm × 2.9mm with 0.95mm height. The "+T" suffix confirms lead-free RoHS-compliant packaging with matte tin finish.
MAX6323CUT46+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:
- 4.63V
- 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
MAX6323CUT46+T FAQ
1.How can I place an order for MAX6323CUT46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323CUT46+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 MAX6323CUT46+T reliable?
The price and inventory of MAX6323CUT46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323CUT46+T is usually 5 days.
3.What payment methods are accepted for MAX6323CUT46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323CUT46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323CUT46+T?
MAX6323CUT46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323CUT46+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 MAX6323CUT46+T?
For technical support, including MAX6323CUT46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323CUT46+T requirements.
6.How does Aetrix verify that MAX6323CUT46+T is sourced from the original manufacturer or authorized distributors?
All MAX6323CUT46+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 MAX6323CUT46+T meets industry standards.
7.What is the process for return or replacement of MAX6323CUT46+T?
All MAX6323CUT46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323CUT46+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 MAX6323CUT46+T part is unused and in its original packaging.
Return procedure for MAX6323CUT46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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