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Analog Devices Inc./Maxim Integrated MAX6323EUT29+T
- Part No.:
- MAX6323EUT29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323EUT29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,953
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Product details
Overview
MAX6323EUT29+T from Maxim Integrated is a microprocessor supervisory IC with windowed (min/max) watchdog, precision 2.93V ±2.5% reset threshold, push-pull active-low RESET output, and guaranteed operation down to VCC = +1.2V. It monitors power supply integrity and µP execution timing in automotive engine control units, industrial PLCs, and medical infusion pumps.
For engineers reviewing the MAX6323EUT29+T datasheet, MAX6323EUT29+T pinout, MAX6323EUT29+T application, or MAX6323EUT29+T equivalent, key selection criteria include its factory-trimmed 290ms slow watchdog timeout (H variant), 1.5ms fast fault detection, 23µA typical supply current, and AEC-Q100-compatible SOT23-6 package rated for -40°C to +125°C.
Technical Context
The MAX6323EUT29+T implements a dual-window watchdog architecture: it detects both fast faults (WDI falling edges <1.5ms apart) and slow faults (no WDI edge >290ms), with WDPO pulsed low for 1ms on fault. Its VCC monitor uses a laser-trimmed comparator with ±2.5% accuracy across temperature.
RESET assertion is synchronized to VCC crossing the 2.93V threshold and includes a guaranteed 100ms minimum deassertion delay after recovery; MR input is internally pulled up and debounced, requiring only a 1µs low pulse to trigger reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% - precisely matches 3.0V rail monitoring with brownout immunity down to 2.85V |
| Slow Watchdog Timeout | 290ms (H variant) - enables robust detection of µP hangs in real-time control loops |
| Fast Watchdog Timeout | 1.5ms - identifies rapid code execution errors or clock faults before system instability |
| Supply Current | 23µA typ - supports always-on monitoring in battery-backed industrial sensors |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and factory-floor industrial use |
| RESET Output Type | Push-pull - eliminates need for external pullup resistor in single-supply systems |
| VCC Validity Range | 1.2V to 5.5V - ensures reliable reset assertion even during deep brownout conditions |
Pinout & Package
MAX6323EUT29+T is housed in a 6-pin SOT23 package (package code U6+1A), footprint compatible with JEDEC MO-178AA, 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 on falling edge; 1µs minimum pulse width |
| 2 - GND | Ground reference | Common return path for all internal circuitry and reset comparator reference |
| 3 - WDI | Watchdog input | Falling-edge-triggered; resets internal timer window; 300ns minimum pulse width required |
| 4 - VCC | Supply voltage input | Monitored for reset generation; bypass with ≥500pF capacitor for noise immunity |
| 5 - WDPO | Open-drain watchdog pulse output | Pulses low for 1ms on fast/slow fault; 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; held for ≥100ms after recovery; no external pullup needed |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog | Dual-threshold timing detection prevents false resets from transient µP delays while catching true hangs |
| Laser-trimmed reset threshold | ±2.5% accuracy over -40°C to +125°C ensures consistent 3.0V rail supervision without calibration |
| Guaranteed reset validity to 1.2V | Enables fail-safe reset assertion during deep undervoltage events where µP logic fails |
| Debounced manual reset input | Rejects 100ns glitches and eliminates external RC network, reducing BOM count and PCB area |
| Low quiescent current | 23µA typical draw allows integration into energy-sensitive applications like portable medical devices |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Monitors 3.0V microcontroller supply and validates firmware execution timing in diesel ECU modules exposed to wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Dual-role supervisor: VCC monitor triggers power-on/brownout reset; windowed watchdog detects stuck instruction sequences in safety-critical control loops. Use Value: Prevents uncontrolled fuel injection by forcing hard reset within 290ms of µP hang, meeting ISO 26262 ASIL-B timing requirements. |
Use Scenario: Ensures deterministic startup and runtime supervision of ARM-based PLC CPUs operating in factory automation environments with 24V DC field power. IC Role / Device Role / Timing Role: Provides clean power-on reset and continuous watchdog validation of cyclic executive tasks running at 10ms intervals. Use Value: Guarantees 100ms minimum reset pulse width for full FPGA configuration reload and memory initialization after fault recovery. |
| Medical Infusion Pump Controller | Avionics Sensor Interface Module |
Use Scenario: Supervises 3.0V supply and software health of PIC32-based pump controller in battery-operated portable infusion systems requiring IEC 62304 Class C compliance. IC Role / Device Role / Timing Role: Acts as independent hardware watchdog, decoupled from µP clock domain, verifying correct execution of motor control and dose calculation routines. Use Value: Delivers 1ms WDPO pulse to NMI input upon fault detection, enabling non-maskable interrupt handling without full system reset-preserving critical therapy state data. |
Use Scenario: Validates operation of ADSP-BF533 DSP in airborne sensor fusion modules subjected to extended thermal cycling and radiation-induced soft errors. IC Role / Device Role / Timing Role: Provides redundant reset generation and min/max watchdog coverage for time-critical inertial measurement unit (IMU) data processing pipelines. Use Value: Maintains guaranteed reset assertion down to VCC = +1.2V, ensuring safe shutdown during partial power loss in dual-redundant avionics power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324EUT29+T | Open-drain RESET output instead of push-pull; identical watchdog, threshold, and timing specs | Required when interfacing with bidirectional µP reset pins (e.g., Motorola 68HC11) or level-shifting across multiple supply domains | Select MAX6324EUT29+T only if open-drain functionality is needed; otherwise MAX6323EUT29+T reduces component count |
| TPS3808G33DBVR | Fixed 3.3V reset threshold (not 2.93V); no windowed watchdog (only simple timeout); 35µA supply current | Suitable for basic power-on reset in non-safety-critical 3.3V systems but lacks min/max fault detection capability | Choose TPS3808G33DBVR only for cost-sensitive, non-watchdog applications where 3.3V threshold suffices |
Compared with MAX6324EUT29+T, the MAX6323EUT29+T eliminates external pullup components in single-rail designs; versus TPS3808G33DBVR, it delivers certified windowed watchdog functionality essential for functional safety compliance in automotive and medical systems.
Availability
MAX6323EUT29+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 MAX6323EUT29+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 emphasis on reliability and parametric accuracy.
The MAX6323/MAX6324 product line delivers AEC-Q100-qualified supervisory circuits optimized for functional safety-critical systems requiring deterministic reset behavior and dual-threshold watchdog validation.
FAQ
What is the exact reset threshold voltage of MAX6323EUT29+T and how is it trimmed?
The MAX6323EUT29+T has a nominal reset threshold of 2.93V with ±2.5% accuracy over -40°C to +125°C. This value is achieved via factory laser trimming of on-chip resistors, as confirmed in the Electrical Characteristics table (VTH = 2.85V to 3.00V). The "29" suffix in MAX6323EUT29+T explicitly denotes this 2.93V threshold variant, and the specification is guaranteed-not typical-across full temperature range.
Does MAX6323EUT29+T support windowed (min/max) watchdog functionality, and what are its timeout values?
Yes, MAX6323EUT29+T implements true windowed watchdog logic. The "E" in MAX6323EUT29+T indicates the slow timeout variant: 60ms minimum / 90ms maximum (tWD2). Its fast timeout (tWD1) is 10ms minimum / 15ms maximum. These values are factory-trimmed and documented in the Watchdog Timeout table; they enable detection of both premature and delayed WDI pulses relative to expected software timing windows.
What is the RESET output configuration of MAX6323EUT29+T, and how does it differ from MAX6324 variants?
MAX6323EUT29+T features a push-pull RESET output, meaning it actively drives both high and low states without requiring an external pullup resistor. This contrasts with the MAX6324EUT29+T, which uses an open-drain RESET output and mandates an external pullup. The push-pull design simplifies layout and reduces component count in single-supply systems where RESET drives only one µP input.
Can MAX6323EUT29+T operate reliably at VCC = +1.2V, and what happens to RESET below that voltage?
Yes, MAX6323EUT29+T guarantees valid RESET assertion down to VCC = +1.2V, as stated in the General Description and Electrical Characteristics. Below +1.2V, the RESET output becomes high-impedance (open circuit) and ceases sinking current. This behavior is intentional: most µPs are nonfunctional below +1.2V, so maintaining RESET assertion is unnecessary-and the IC avoids invalid logic states by disabling the output stage.
What package type and RoHS status does MAX6323EUT29+T use, and is it automotive-qualified?
MAX6323EUT29+T uses a 6-pin SOT23 package (outline 21-0058, land pattern 90-0175) with lead-free termination, indicated by the "+T" suffix per Maxim's ordering convention. It is not automotive-qualified: the "/V" suffix (e.g., MAX6324HUT44/V+T) denotes AEC-Q100 qualification, and MAX6323EUT29+T lacks this designation. Its -40°C to +125°C rating supports industrial and extended-temperature applications but not formal automotive qualification.
MAX6323EUT29+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
MAX6323EUT29+T FAQ
1.How can I place an order for MAX6323EUT29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323EUT29+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 MAX6323EUT29+T reliable?
The price and inventory of MAX6323EUT29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323EUT29+T is usually 5 days.
3.What payment methods are accepted for MAX6323EUT29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323EUT29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323EUT29+T?
MAX6323EUT29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323EUT29+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 MAX6323EUT29+T?
For technical support, including MAX6323EUT29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323EUT29+T requirements.
6.How does Aetrix verify that MAX6323EUT29+T is sourced from the original manufacturer or authorized distributors?
All MAX6323EUT29+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 MAX6323EUT29+T meets industry standards.
7.What is the process for return or replacement of MAX6323EUT29+T?
All MAX6323EUT29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323EUT29+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 MAX6323EUT29+T part is unused and in its original packaging.
Return procedure for MAX6323EUT29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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