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Analog Devices Inc./Maxim Integrated MAX6323CUT29-T
- Part No.:
- MAX6323CUT29-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323CUT29-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,432
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Product details
Overview
MAX6323CUT29-T from Maxim Integrated is a push-pull-output microprocessor supervisory circuit with windowed (min/max) watchdog, 2.93V ±2.5% reset threshold, and factory-trimmed fast/slow timeout windows (C = 10–15ms fast, 300–450ms slow). It monitors +2.5V/+3.3V systems in automotive engine control units requiring reliable power-on reset and fault-detection timing integrity.
For engineers reviewing the MAX6323CUT29-T datasheet, MAX6323CUT29-T pinout, MAX6323CUT29-T application, or MAX6323CUT29-T equivalent, key selection criteria include guaranteed RESET validity down to VCC = +1.2V, 23µA typical supply current at 3.3V, 100ms minimum reset timeout, and SOT23-6 package compatibility with high-temperature industrial PCB layouts.
Technical Context
The MAX6323CUT29-T implements a dual-window watchdog architecture: fast timeout (tWD1 = 10–15ms) detects premature WDI pulses, while slow timeout (tWD2 = 300–450ms) catches missed pulses-both measured from falling edge of WDI with ≥300ns minimum pulse width. WDPO asserts low for 1ms on fault detection and remains inactive when RESET is asserted.
VCC reset monitoring uses a precision comparator with ±2.5% threshold accuracy over –40°C to +125°C; RESET deasserts only after VCC exceeds 2.93V and remains stable for ≥100ms. MR input features internal 50–85kΩ pullup, 1µs minimum pulse width, and 100ns glitch immunity-enabling direct switch connection without external debounce.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% - precisely matches 3.0V rail monitoring with brownout margin |
| Reset Timeout Delay | 100–280ms - ensures µP initialization completes before release |
| Watchdog Fast Timeout | 10–15ms - detects software loops executing too rapidly |
| Watchdog Slow Timeout | 300–450ms - identifies stalled code or missed interrupt servicing |
| Supply Current | 23µA typ at 3.3V - enables always-on supervision in battery-backed systems |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial environments |
| RESET Output Type | Push-pull - eliminates need for external pullup resistor on reset line |
Pinout & Package
MAX6323CUT29-T is housed in a 6-pin SOT23 package (package code U6+1A, outline 21-0058), optimized for space-constrained PCBs with thermal resistance θJA = 115°C/W on multilayer board.
| 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 |
| 2 - GND | Ground reference | Common return path for all internal circuits and external bypass capacitor (≥500pF) |
| 3 - WDI | Watchdog input | Falling-edge-triggered; resets internal timer and disables WDPO assertion during valid window |
| 4 - VCC | Supply voltage input | Monitored for reset generation; supports 1.2V–5.5V operation with guaranteed RESET down to 1.2V |
| 5 - WDPO | Open-drain watchdog pulse output | Pulses low for 1ms on fast/slow fault; requires external pullup to ≤6V supply |
| 6 - RESET | Active-low push-pull reset output | Asserts low during VCC undervoltage or MR activation; no external pullup needed |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog | Dual-timing fault detection (fast + slow) prevents false resets from transient noise or clock jitter |
| Debounced MR input | Internal 50–85kΩ pullup and 100ns glitch rejection enable direct switch interface without RC network |
| Low-power operation | 23µA typical ICC at 3.3V allows integration into always-on subsystems without compromising battery life |
| VCC reset down to 1.2V | Guaranteed RESET assertion even as supply collapses-critical for deterministic shutdown sequencing |
| SOT23-6 footprint | Industry-standard 6-pin package enables drop-in replacement and automated assembly compatibility |
Applications
| Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitors 3.3V microcontroller supply and validates real-time firmware execution in diesel engine management systems. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout detection, and min/max watchdog timing enforcement. Use Value: Prevents unsafe actuator commands during boot-up or software hang by asserting RESET for ≥100ms and pulsing WDPO for 1ms on timing violations. |
Use Scenario: Ensures deterministic restart of ARM-based controller in modular I/O rack exposed to EMI and voltage transients. IC Role / Device Role / Timing Role: System-level supervisor managing VCC integrity and detecting firmware lockup via WDI edge timing. Use Value: Guarantees RESET remains valid down to VCC = +1.2V, enabling safe state retention during partial power loss. |
| Medical Infusion Pump Controller | Railway Signaling Interface Board |
|
Use Scenario: Provides fail-safe reset and watchdog supervision for safety-critical dosing algorithm execution. IC Role / Device Role / Timing Role: Fault-detection circuit enforcing strict timing windows on WDI pulses to catch stuck loops. Use Value: Delivers 10–15ms fast timeout and 300–450ms slow timeout-aligned with ISO 13849 PLd response time requirements. |
Use Scenario: Supervises 2.93V logic supply in track-side signaling hardware operating across –40°C to +125°C ambient. IC Role / Device Role / Timing Role: High-reliability reset generator with ±2.5% threshold accuracy over full temperature range. Use Value: Maintains 23µA supply current and 100ms reset delay stability-ensuring consistent behavior in thermally stressed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6323CUT26-T | Lower reset threshold (2.63V ±2.5%) with identical watchdog timing and SOT23-6 package | Better suited for 2.5V logic rails; not interchangeable on 3.0V/3.3V systems without validation | Select when supervising 2.5V supplies where tighter margin below nominal rail is required |
| MAX6324CUT29-T | Same reset threshold (2.93V) and watchdog windows, but open-drain RESET output instead of push-pull | Enables bidirectional reset pin interfacing (e.g., Motorola 68HC11) and level-shifting across multiple supplies | Choose when system requires shared reset bus or multi-rail reset coordination |
Compared with MAX6323CUT29-T, MAX6323CUT26-T shifts reset assertion to lower voltage for 2.5V domains, while MAX6324CUT29-T trades push-pull drive for open-drain flexibility-neither offers pin-to-pin compatibility without layout or pullup resistor changes.
Availability
MAX6323CUT29-T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and railway signaling interface boards requiring stable component supply across extended temperature ranges.
Supply support for MAX6323CUT29-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 designs high-performance analog and mixed-signal semiconductor solutions for automotive, industrial, and computing markets, with expertise in power management, sensing, and interface ICs.
The MAX6323/MAX6324 product line delivers precision-supervised microprocessor reset and windowed watchdog functionality specifically for safety-critical embedded systems demanding AEC-Q100-grade reliability and wide-temperature operation.
FAQ
What is the exact reset threshold voltage of MAX6323CUT29-T?
The MAX6323CUT29-T has a nominal reset threshold of 2.93V with ±2.5% accuracy over –40°C to +125°C, corresponding to the "29" suffix per Maxim's ordering nomenclature. This value is laser-trimmed at wafer test and guaranteed across the full operating temperature range, making it suitable for precise monitoring of 3.0V and 3.3V power rails.
Does MAX6323CUT29-T support watchdog timeout configuration after manufacturing?
No, MAX6323CUT29-T does not support post-manufacture watchdog timeout adjustment. Its "C" suffix indicates factory-laser-trimmed fast timeout (10–15ms) and slow timeout (300–450ms) windows. These values are fixed during production and cannot be modified via pins, registers, or external components-designers must select the appropriate variant at order time.
Can MAX6323CUT29-T operate reliably at VCC = 1.2V?
Yes, MAX6323CUT29-T guarantees valid RESET output down to VCC = +1.2V, meaning the push-pull RESET signal remains functional and correctly asserted even as the supply voltage collapses. Below 1.2V, RESET becomes high-impedance, but this behavior is explicitly characterized and documented in the datasheet for safe system-level shutdown design.
What is the function of the WDPO pin on MAX6323CUT29-T?
The WDPO (Watchdog Pulse Output) pin on MAX6323CUT29-T is an open-drain output that pulses low for 1ms upon detection of either a fast watchdog fault (WDI falling edges too close together) or a slow watchdog fault (no WDI edge within the timeout window). WDPO remains inactive while RESET is asserted and requires an external pullup resistor to any supply ≤+6V.
Is MAX6323CUT29-T compatible with AEC-Q100 automotive qualification?
MAX6323CUT29-T itself is not AEC-Q100 qualified; only specific variants like MAX6324HUT44/V+T carry that qualification. However, MAX6323CUT29-T operates across the extended automotive temperature range (–40°C to +125°C) and meets all electrical specifications under those conditions-making it suitable for non-safety-critical automotive subsystems where full AEC-Q100 certification is not mandated.
MAX6323CUT29-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
MAX6323CUT29-T FAQ
1.How can I place an order for MAX6323CUT29-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323CUT29-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 MAX6323CUT29-T reliable?
The price and inventory of MAX6323CUT29-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323CUT29-T is usually 5 days.
3.What payment methods are accepted for MAX6323CUT29-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323CUT29-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323CUT29-T?
MAX6323CUT29-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323CUT29-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 MAX6323CUT29-T?
For technical support, including MAX6323CUT29-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323CUT29-T requirements.
6.How does Aetrix verify that MAX6323CUT29-T is sourced from the original manufacturer or authorized distributors?
All MAX6323CUT29-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 MAX6323CUT29-T meets industry standards.
7.What is the process for return or replacement of MAX6323CUT29-T?
All MAX6323CUT29-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323CUT29-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 MAX6323CUT29-T part is unused and in its original packaging.
Return procedure for MAX6323CUT29-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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