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Analog Devices Inc./Maxim Integrated MAX6323AUT29-T
- Part No.:
- MAX6323AUT29-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323AUT29-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,583
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Product details
Overview
MAX6323AUT29-T from Maxim Integrated is a push-pull-output microprocessor supervisory circuit with windowed (min/max) watchdog, 2.93V ±2.5% reset threshold, 100ms minimum reset timeout, and operation from 1.2V to 5.5V supply. It monitors power integrity and processor timing in automotive engine control units, industrial PLCs, and medical infusion pumps.
For engineers reviewing the MAX6323AUT29-T datasheet, MAX6323AUT29-T pinout, MAX6323AUT29-T application, or MAX6323AUT29-T equivalent, key selection criteria include its factory-trimmed 2.93V reset threshold, A-suffix 1.5ms/10ms fast/slow watchdog window, guaranteed RESET validity down to VCC = +1.2V, and SOT23-6 packaging for space-constrained embedded systems.
Technical Context
The MAX6323AUT29-T implements a dual-mode watchdog that detects both fast faults (WDI falling edges <1.5ms apart) and slow faults (no WDI edge >10ms), using laser-trimmed internal timing. Its reset comparator guarantees monotonic behavior across -40°C to +125°C with ±2.5% threshold accuracy and 20µs response to VCC transients.
This variant uses the 'A' watchdog timeout configuration (1.5ms fast / 10ms slow) and '29' reset threshold code (2.85V–3.00V nominal), with push-pull RESET output capable of sourcing 500µA at 0.8×VCC and sinking 1.2mA at 0.4V - eliminating external pullup requirements for RESET.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% (2.85V–3.00V); ensures reliable brownout detection for 3.0V/3.3V logic rails |
| Watchdog Timeout (Fast/Slow) | 1.5ms / 10ms; detects software lockups within tight timing windows typical of real-time control loops |
| Reset Timeout Delay | 100–280ms; guarantees µP initialization completes before release, preventing premature execution |
| Supply Voltage Range | 1.2V to 5.5V; supports valid RESET assertion during deep brownout conditions down to 1.2V |
| Quiescent Current | 23µA typ at 2.5V/3.3V; enables always-on monitoring in battery-backed systems |
| Operating Temperature | -40°C to +125°C; qualified for under-hood automotive and industrial ambient environments |
| RESET Output Type | Push-pull; eliminates need for external pullup resistor on RESET line, simplifying BOM and layout |
Pinout & Package
Package: 6-pin SOT23 (U6+1A), 1.6mm × 2.9mm footprint, JEDEC MO-178AC compliant, 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 for ≥100ms after rising edge; immune to 100ns glitches |
| 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; minimum pulse width 300ns; VIH = 0.75×VCC |
| 4 VCC | Supply voltage input | Monitored for reset generation; bypass with ≥500pF capacitor near pin for noise immunity |
| 5 WDPO | Open-drain watchdog pulse output | Pulses low for 1ms on fault detection; requires external pullup; active only when RESET is high |
| 6 RESET | Active-low push-pull reset output | Asserted when VCC < 2.93V or MR low; deasserts ≥100ms after VCC rise and MR release |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog | Detects both too-fast and too-slow WDI transitions - critical for validating deterministic real-time software execution |
| Factory-trimmed thresholds | Laser-trimmed 2.93V reset and A-suffix 1.5ms/10ms watchdog eliminate external calibration components |
| Guaranteed RESET down to VCC = +1.2V | Ensures controlled shutdown sequence even during severe brownout, preventing undefined µP states |
| Debounced manual reset | MR accepts direct switch connection without external RC network; rejects sub-100ns noise pulses |
| Low-power operation | 23µA typical supply current enables continuous 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: Provides power-on reset, brownout protection, and windowed watchdog supervision of main MCU's WDI signal. Use Value: Prevents unsafe actuator commands during software hangs by pulsing WDPO to NMI or asserting RESET via MR loopback within 10ms of fault detection. |
Use Scenario: Ensures deterministic startup and runtime supervision of ARM-based controller in factory automation I/O modules. IC Role / Device Role / Timing Role: Generates clean reset pulse at power-up and continuously validates instruction flow via WDI sampling. Use Value: Guarantees 100ms minimum reset hold time and maintains RESET validity down to 1.2V, enabling safe recovery from partial rail collapse. |
| Medical Infusion Pump Controller | Railway Signaling Interface Module |
|
Use Scenario: Supervises safety-critical ARM Cortex-M4 in battery-powered infusion pump with dual-voltage rails (3.3V logic, 5.0V motor driver). IC Role / Device Role / Timing Role: Delivers fail-safe reset and watchdog pulse independent of VCC level, interfacing with pump motor driver enable logic. Use Value: Push-pull RESET eliminates pullup resistor, reducing component count and failure modes in Class II medical device BOM. |
Use Scenario: Provides EN5012x-compliant supervision for FPGA-based signaling interface operating in harsh rail-side environments (-40°C to +125°C). IC Role / Device Role / Timing Role: Monitors 3.0V FPGA core supply and validates firmware heartbeat in SIL-2 safety chain. Use Value: AEC-Q100-aligned temperature range and ±2.5% reset accuracy ensure compliance with railway functional safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324AUT29-T | Open-drain RESET output; identical reset threshold, watchdog window, and package | Required where bidirectional reset pins (e.g., Motorola 68HC11) or multi-rail level shifting is needed | Select MAX6324AUT29-T when external pullup on RESET is acceptable and µP reset pin supports open-drain drive |
| TPS3808G33DBVR | Fixed 3.08V reset threshold; no windowed watchdog; 200ms reset timeout; 2.5µA quiescent current | Suitable for basic power monitoring only - lacks min/max timing validation for safety-critical code execution | Choose TPS3808G33DBVR only for cost-sensitive non-safety applications requiring ultra-low IQ and no watchdog function |
Compared with MAX6323AUT29-T, MAX6324AUT29-T offers identical supervision functionality but requires an external pullup on RESET, while TPS3808G33DBVR reduces current draw by 90% but removes critical windowed watchdog capability needed for ISO 26262 or IEC 61508 compliance.
Availability
MAX6323AUT29-T is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC development, and medical device production requiring stable component supply across extended temperature ranges and long lifecycle support.
Supply support for MAX6323AUT29-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, with expertise in power management and system-level supervision.
The MAX6323/MAX6324 product line delivers AEC-Q100-qualified microprocessor supervisors with windowed watchdogs specifically engineered for functional safety-critical systems requiring deterministic fault detection and robust power sequencing.
FAQ
What is the exact reset threshold voltage of MAX6323AUT29-T?
The MAX6323AUT29-T has a factory-laser-trimmed reset threshold of 2.93V with ±2.5% accuracy over -40°C to +125°C, corresponding to the '29' suffix in its part number. This means the actual threshold falls between 2.85V and 3.00V under all operating conditions, ensuring precise brownout detection for 3.0V/3.3V systems without external calibration.
Does MAX6323AUT29-T support windowed watchdog functionality?
Yes, MAX6323AUT29-T implements true windowed (min/max) watchdog supervision. With the 'A' suffix, it triggers WDPO on fast faults (WDI falling edges <1.5ms apart) or slow faults (no WDI edge >10ms), enabling detection of both software lockups and timing violations in real-time control firmware - a capability not found in standard timeout-only watchdogs.
What is the minimum supply voltage at which MAX6323AUT29-T guarantees valid RESET output?
MAX6323AUT29-T guarantees valid RESET output down to VCC = +1.2V, meaning the push-pull RESET driver remains functional and asserts a defined logic-low state even during severe brownout conditions. Below 1.2V, RESET becomes high-impedance - a design feature enabling safe system shutdown before logic corruption occurs.
How does the manual reset (MR) input behave on MAX6323AUT29-T?
The MR input on MAX6323AUT29-T is active-low, internally pulled up to VCC, and debounced to reject 100ns noise pulses. When asserted low for ≥1µs, it forces RESET low for ≥100ms after MR releases - providing a clean, glitch-immune reset initiation path without external components, ideal for front-panel switches or system-level fault signals.
Is MAX6323AUT29-T qualified for automotive applications?
While MAX6323AUT29-T operates across the automotive temperature range (-40°C to +125°C) and shares the same process and design as AEC-Q100-qualified variants like MAX6324HUT44/V+T, the MAX6323AUT29-T itself is not explicitly AEC-Q100 certified per its ordering code. For automotive safety-critical use, confirm qualification status with Maxim/Analog Devices or select a /V-suffixed variant.
MAX6323AUT29-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
MAX6323AUT29-T FAQ
1.How can I place an order for MAX6323AUT29-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323AUT29-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 MAX6323AUT29-T reliable?
The price and inventory of MAX6323AUT29-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323AUT29-T is usually 5 days.
3.What payment methods are accepted for MAX6323AUT29-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323AUT29-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323AUT29-T?
MAX6323AUT29-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323AUT29-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 MAX6323AUT29-T?
For technical support, including MAX6323AUT29-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323AUT29-T requirements.
6.How does Aetrix verify that MAX6323AUT29-T is sourced from the original manufacturer or authorized distributors?
All MAX6323AUT29-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 MAX6323AUT29-T meets industry standards.
7.What is the process for return or replacement of MAX6323AUT29-T?
All MAX6323AUT29-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323AUT29-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 MAX6323AUT29-T part is unused and in its original packaging.
Return procedure for MAX6323AUT29-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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