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Analog Devices Inc./Maxim Integrated MAX6323GUT46+T
- Part No.:
- MAX6323GUT46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323GUT46+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,176
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Product details
Overview
MAX6323GUT46+T from Maxim Integrated is a push-pull-output microprocessor supervisory circuit with windowed (min/max) watchdog, 4.63V ±2.5% reset threshold, 100ms minimum reset timeout, and operation from 1.2V to 5.5V supply. It monitors +5.0V power rails in automotive engine control units and industrial PLCs, asserting active-low RESET on VCC brownout or manual reset.
For engineers reviewing the MAX6323GUT46+T datasheet, MAX6323GUT46+T pinout, MAX6323GUT46+T application, or MAX6323GUT46+T equivalent, key selection criteria include guaranteed RESET validity down to VCC = +1.2V, factory-trimmed 719ms/1.3s slow/fast watchdog timeout (suffix G), debounced MR input, and AEC-Q100-compatible SOT23-6 packaging for high-reliability embedded systems.
Technical Context
The MAX6323GUT46+T implements a dual-window watchdog that detects both fast faults (WDI falling edges <719ms apart) and slow faults (no WDI edge >1.3s), with WDPO pulsed low for 1ms upon fault detection. Its precision voltage monitor uses laser-trimmed comparators to guarantee ±2.5% accuracy over –40°C to +125°C.
RESET assertion is synchronized to VCC crossing the 4.63V threshold with 20µs propagation delay, and remains asserted ≥100ms after recovery. The internal MR pullup (50–85kΩ) eliminates external components, and WDI accepts pulses as narrow as 300ns with 100ns glitch immunity at VCC = 2.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% - precisely matches +5.0V supply monitoring with guaranteed trip point across temperature. |
| Reset Timeout Delay | 100–280ms - ensures stable µP initialization after power-up/brownout before releasing reset. | Watchdog Slow Timeout | 1.3s (typ) - factory-trimmed for applications requiring long software execution windows without false triggers. |
| Watchdog Fast Timeout | 719ms (typ) - detects premature WDI pulses indicating runaway code or clock faults. |
| Supply Current | 23µA (typ at 3V) - enables always-on supervision in battery-backed or low-power industrial nodes. |
| Operating Voltage Range | 1.2V to 5.5V - guarantees functional RESET output even during deep brownout conditions. |
| Output Type | Push-pull RESET - eliminates need for external pullup resistor in standard +5V system designs. |
Pinout & Package
MAX6323GUT46+T is housed in a RoHS-compliant 6-pin SOT23 package (package code U6+1A), with 1.6mm × 2.9mm footprint and 1.1mm height, suitable for high-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MR | Active-low manual reset input | Internally pulled up (50–85kΩ); requires ≥1µs low pulse to assert RESET; immune to 100ns glitches. |
| 2 - GND | Ground reference | Common return for all analog and digital functions; must be low-impedance connection to system ground plane. |
| 3 - WDI | Watchdog input | Falling-edge-triggered; clears internal timer; accepts 300ns min pulse width; VIH = 0.75×VCC. |
| 4 - VCC | Supply voltage input | Monitored rail input; bypass with ≥500pF capacitor near pin to suppress transients and ensure clean reset timing. |
| 5 - WDPO | Open-drain watchdog pulse output | Pulses low for 1ms on fast/slow fault; requires external pullup to ≤+6V; inactive when RESET is asserted. |
| 6 - RESET | Active-low push-pull reset output | Drives low to <0.4V @ 1.2mA; sources high to ≥0.8×VCC; no external pullup needed in +5V systems. |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog | Dual-threshold timing detection prevents false resets from jitter while catching both stuck-loop and hung-code failures. |
| Guaranteed RESET down to VCC = +1.2V | Ensures deterministic reset state even during severe brownout-critical for fail-safe automotive ECU behavior. |
| Debounced MR input | Eliminates need for external RC network or Schmitt trigger; supports direct switch connection with noise immunity. |
| Laser-trimmed voltage thresholds | ±2.5% accuracy over full temperature range avoids recalibration and enables single-BOM support across vehicle platforms. |
| Extended temperature range | –40°C to +125°C operation validated for under-hood automotive and industrial control environments. |
Applications
| Engine Control Unit (ECU) | Programmable Logic Controller (PLC) |
|---|---|
|
Use Scenario: Monitors 5V microcontroller supply in diesel engine management systems exposed to wide thermal cycling and electrical noise. IC Role / Device Role / Timing Role: Provides power-on reset, brownout protection, and windowed watchdog supervision of main MCU execution flow. Use Value: Prevents unsafe engine operation due to software lockup by forcing hard reset via WDPO-to-MR loopback within 1.3s of fault detection. |
Use Scenario: Supervises ARM-based controller in factory automation I/O modules operating continuously in 24/7 industrial settings. IC Role / Device Role / Timing Role: Ensures deterministic boot sequence and detects firmware hangs during cyclic scan execution. Use Value: Enables unattended recovery from transient software faults without operator intervention or system downtime. |
| Medical Infusion Pump | Railway Signaling Interface |
|
Use Scenario: Secures safety-critical dosing logic in battery-powered infusion pumps where power integrity must be verified before motor activation. IC Role / Device Role / Timing Role: Validates 5V logic supply and enforces strict software timing windows to prevent overdose errors. Use Value: Meets IEC 62304 Class C requirements by guaranteeing reset assertion during VCC decay below 4.5V and detecting out-of-spec WDI timing. |
Use Scenario: Supervises FPGA configuration in track-side signaling controllers subjected to EMI from traction currents and lightning surges. IC Role / Device Role / Timing Role: Provides robust reset generation and watchdog monitoring immune to 200ns VCC transients. Use Value: Achieves SIL-4 compliance through guaranteed 100ms reset hold time and 1.3s watchdog timeout aligned with EN 5012x safety intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324GUT46+T | Open-drain RESET output instead of push-pull; identical watchdog, reset threshold, and timing specs. | Required when interfacing with bidirectional µP reset pins (e.g., Motorola 68HC11) or level-shifting across multiple supply domains. | Select MAX6324GUT46+T only if open-drain functionality is needed; otherwise MAX6323GUT46+T simplifies design with no pullup required. |
| TPS3808G33DBVR | Fixed 3.3V reset threshold; no windowed watchdog; 200ms reset timeout; 1.4µA quiescent current. | Suitable for low-power 3.3V systems without complex timing supervision needs-lacks dual-window fault detection capability. | Choose TPS3808G33DBVR only for cost-sensitive 3.3V applications where windowed watchdog is unnecessary. |
Compared with MAX6324GUT46+T and TPS3808G33DBVR, the MAX6323GUT46+T uniquely delivers push-pull reset drive, 4.63V precision monitoring for +5V rails, and factory-trimmed 719ms/1.3s windowed watchdog-enabling fail-safe supervision in automotive and industrial control where deterministic reset behavior and dual-fault detection are mandatory.
Availability
MAX6323GUT46+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and medical infusion pumps requiring stable component supply with AEC-Q100-aligned reliability and extended temperature support.
Supply support for MAX6323GUT46+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, low power, and integration.
The MAX6323/MAX6324 product line delivers microprocessor supervisory circuits optimized for safety-critical embedded systems requiring precise voltage monitoring, manual reset, and windowed watchdog functionality across harsh environments.
FAQ
What is the exact reset threshold voltage of MAX6323GUT46+T?
The MAX6323GUT46+T has a nominal reset threshold of 4.63V with ±2.5% accuracy over –40°C to +125°C, corresponding to the "46" suffix in its part number. This value is laser-trimmed at wafer test and guaranteed across the full operating temperature range, making it suitable for precise +5.0V supply monitoring in automotive and industrial applications where tolerance margins are tight.
Does MAX6323GUT46+T support windowed watchdog functionality?
Yes, the MAX6323GUT46+T implements a true min/max (windowed) watchdog using the "G" suffix configuration, providing factory-trimmed fast timeout of 719ms (min) and slow timeout of 1.3s (max). This allows detection of both premature WDI pulses (indicating runaway loops) and missing pulses (indicating hung code), unlike basic timeout-only supervisors.
What is the function of the WDPO pin on MAX6323GUT46+T?
The WDPO (watchdog pulse output) pin on MAX6323GUT46+T is an open-drain output that pulses low for 1ms (typical) upon detection of either a fast or slow watchdog fault. It operates independently of the RESET signal and remains inactive while RESET is asserted, enabling diagnostic logging or NMI triggering without interfering with system reset sequencing.
Can MAX6323GUT46+T operate with supply voltages below 2.5V?
Yes, the MAX6323GUT46+T operates from 1.2V to 5.5V and guarantees valid RESET output down to VCC = +1.2V. Below this voltage, the RESET output becomes high-impedance, but the device continues to monitor VCC and will reassert RESET once VCC rises above the 4.63V threshold and remains there for ≥100ms.
Is MAX6323GUT46+T qualified for automotive applications?
The MAX6323GUT46+T is not explicitly AEC-Q100 qualified-only the /V-suffixed variants (e.g., MAX6324HUT44/V+T) carry that qualification. However, it shares the same die, SOT23-6 package, and –40°C to +125°C operating range, and is widely used in automotive subsystems where full AEC-Q100 certification is not mandated by the OEM tier-1 specification.
MAX6323GUT46+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
MAX6323GUT46+T FAQ
1.How can I place an order for MAX6323GUT46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323GUT46+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 MAX6323GUT46+T reliable?
The price and inventory of MAX6323GUT46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323GUT46+T is usually 5 days.
3.What payment methods are accepted for MAX6323GUT46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323GUT46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323GUT46+T?
MAX6323GUT46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323GUT46+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 MAX6323GUT46+T?
For technical support, including MAX6323GUT46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323GUT46+T requirements.
6.How does Aetrix verify that MAX6323GUT46+T is sourced from the original manufacturer or authorized distributors?
All MAX6323GUT46+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 MAX6323GUT46+T meets industry standards.
7.What is the process for return or replacement of MAX6323GUT46+T?
All MAX6323GUT46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323GUT46+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 MAX6323GUT46+T part is unused and in its original packaging.
Return procedure for MAX6323GUT46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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