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Analog Devices Inc./Maxim Integrated MAX6323FUT46+T
- Part No.:
- MAX6323FUT46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323FUT46+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
MAX6323FUT46+T from Maxim Integrated is a microprocessor supervisory circuit with windowed (min/max) watchdog, 4.63V ±2.5% reset threshold, push-pull active-low RESET output, and 719ms/1.3s fast/slow watchdog timeout. It monitors VCC in automotive and industrial embedded systems and guarantees valid RESET down to VCC = +1.2V.
For engineers reviewing the MAX6323FUT46+T datasheet, MAX6323FUT46+T pinout, MAX6323FUT46+T application, or MAX6323FUT46+T equivalent, key selection criteria include factory-trimmed 4.63V reset accuracy, dual-window watchdog fault detection, SOT23-6 package compatibility, and guaranteed operation across –40°C to +125°C.
Technical Context
The MAX6323FUT46+T implements a precision voltage monitor with laser-trimmed 4.63V reset threshold (±2.5%) and a windowed watchdog that detects both fast faults (WDI falling edges <719ms apart) and slow faults (no WDI edge >1.3s). Its push-pull RESET output asserts low on VCC drop below threshold or MR assertion and remains asserted ≥100ms after recovery.
It features debounced manual reset input (MR), 23µA typical supply current, and operates from 1.2V to 5.5V. The watchdog pulse output (WDPO) is open-drain and pulses low for 1ms upon fault detection, independent of RESET status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5%; ensures reliable power-on/brownout reset for +5V systems |
| Watchdog Fast Timeout | 719ms (min); detects premature WDI pulses indicating software lockup |
| Watchdog Slow Timeout | 1.3s (max); detects missed WDI pulses indicating stalled execution |
| RESET Assertion Delay | ≥100ms after VCC rise/MR release; meets µP minimum reset hold time |
| Supply Current | 23µA typ at 3.3V; enables low-power always-on monitoring in battery-backed systems |
| Operating Temperature | –40°C to +125°C; qualified for under-hood automotive and harsh industrial environments |
| VCC Range | 1.2V to 5.5V; supports valid RESET assertion even during deep brownout |
Pinout & Package
MAX6323FUT46+T is housed in a 6-pin SOT23 package (package code U6+1A), with 1.6mm × 2.9mm footprint and JEDEC MO-178AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MR | Active-low manual reset input | Internally pulled up; asserts RESET when pulled low ≥1µs; immune to 100ns glitches |
| 2 - GND | Ground reference | Common return path for all internal circuits and external bypass capacitors |
| 3 - WDI | Watchdog input | Falling-edge triggered; resets internal timer; requires ≥300ns pulse width |
| 4 - VCC | Supply voltage input | Monitored for reset generation; requires ≥500pF bypass capacitor for noise immunity |
| 5 - WDPO | Open-drain watchdog pulse output | Pulses low for 1ms on fast/slow fault; requires external pullup to ≤+6V |
| 6 - RESET | Active-low push-pull reset output | Drives low without external pullup; sinks 1.2mA at VCC = 2.25V; VOH = VCC – 1.5V |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog | Detects both too-fast and too-slow WDI transitions-critical for safety-critical loop timing validation |
| Laser-trimmed reset threshold | 4.63V ±2.5% accuracy eliminates need for external resistor divider calibration |
| Guaranteed RESET validity to VCC = +1.2V | Ensures deterministic reset behavior during deep undervoltage conditions before system collapse |
| Debounced MR input | Accepts direct switch connection without external RC network; rejects 100ns transients |
| Low quiescent current | 23µA typical enables integration into always-on subsystems without significant battery drain |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 5V supply and software heartbeat in engine management firmware running on ARM Cortex-M7. IC Role / Device Role / Timing Role: Supervisory circuit providing power-on reset, brownout protection, and windowed watchdog supervision of main CPU execution flow. Use Value: Prevents unsafe operation due to stuck loops or clock faults by triggering 100ms hardware reset or 1ms NMI interrupt via WDPO-to-MR loopback. | Use Scenario: Embedded in DIN-rail mounted programmable logic controller handling analog sensor inputs and relay outputs. IC Role / Device Role / Timing Role: Ensures deterministic startup and runtime integrity of real-time control firmware executing cyclic tasks. Use Value: Guarantees reset assertion down to VCC = +1.2V during brownout events and validates watchdog timing windows across –40°C to +125°C operating range. |
| Medical Infusion Pump Controller | Railway Signaling Interface Board |
Use Scenario: Safety-critical dosing controller using dual-core lockstep architecture where watchdog supervision must detect asymmetric execution divergence. IC Role / Device Role / Timing Role: Independent hardware supervisor verifying synchronized WDI pulses from both cores within 719ms–1.3s window. Use Value: Enables fail-safe shutdown via WDPO-triggered MR assertion before incorrect dosage delivery occurs. | Use Scenario: Trackside signaling interface board operating in wide ambient temperature swings and subject to EMI-induced supply transients. IC Role / Device Role / Timing Role: Provides robust power monitoring and glitch-immune manual reset for FPGA-based protocol translation logic. Use Value: Maintains reset assertion for ≥100ms despite 20µs VCC transients; MR input rejects 100ns noise spikes without external filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324FUT46+T | Open-drain RESET output instead of push-pull; identical watchdog and reset thresholds | Required when interfacing with bidirectional µP reset pins or level-shifting across multiple supplies | Select MAX6324FUT46+T only if open-drain RESET is needed; otherwise MAX6323FUT46+T provides simpler drive capability. |
| TPS3808G33DBVR | Fixed 3.3V reset threshold; no windowed watchdog; only slow timeout (200ms); 1.8–6V VCC range | Suitable for basic power-monitoring-only applications without advanced software-execution supervision | Choose TPS3808G33DBVR only when windowed watchdog functionality is unnecessary and 3.3V reset suffices. |
Compared with MAX6324FUT46+T, the MAX6323FUT46+T offers direct-drive RESET without pullup, simplifying layout; compared with TPS3808G33DBVR, it delivers critical min/max watchdog timing validation essential for functional safety compliance in automotive and medical systems.
Availability
MAX6323FUT46+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6323FUT46+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, communications, and computing markets.
The MAX6323/MAX6324 family delivers precision µP supervision with windowed watchdog functionality specifically for safety-critical embedded systems demanding deterministic reset and software-execution validation.
FAQ
What is the exact reset threshold voltage of MAX6323FUT46+T?
The MAX6323FUT46+T has a factory-laser-trimmed nominal reset threshold of 4.63V with ±2.5% accuracy over –40°C to +125°C. Per the datasheet's Reset Threshold Range table, the actual guaranteed range is 4.50V (min) to 4.75V (max) at TA = +25°C, and performance remains within specification across the full temperature range.
Does MAX6323FUT46+T support windowed watchdog functionality?
Yes, MAX6323FUT46+T implements true min/max (windowed) watchdog supervision. Its watchdog detects both fast faults (WDI falling edges occurring <719ms apart) and slow faults (no WDI edge observed >1.3s), enabling precise validation of software loop timing integrity beyond simple timeout detection.
What is the function of the WDPO pin on MAX6323FUT46+T?
The WDPO (Watchdog Pulse Output) pin on MAX6323FUT46+T is an open-drain output that pulses low for 1ms upon detection of either a fast or slow watchdog fault. It operates independently of the RESET signal and requires an external pullup resistor to any supply ≤+6V, enabling flexible fault signaling to NMI inputs or external logic.
Can MAX6323FUT46+T operate reliably at VCC = +1.2V?
Yes, MAX6323FUT46+T guarantees valid RESET output down to VCC = +1.2V. Below this voltage, the RESET output becomes high-impedance, but above +1.2V, it maintains full sink/source capability and timing specifications-including ≥100ms reset timeout-ensuring deterministic behavior during brownout recovery.
What package type and footprint does MAX6323FUT46+T use?
MAX6323FUT46+T uses a 6-pin SOT23 package (outline number 21-0058, land pattern 90-0175), measuring 1.6mm × 2.9mm with 0.95mm pitch. It is RoHS-compliant and lead-free ("+T" suffix), with thermal resistance θJA = 115°C/W on multi-layer PCBs per JEDEC JESD51-7.
MAX6323FUT46+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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
MAX6323FUT46+T FAQ
1.How can I place an order for MAX6323FUT46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323FUT46+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 MAX6323FUT46+T reliable?
The price and inventory of MAX6323FUT46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323FUT46+T is usually 5 days.
3.What payment methods are accepted for MAX6323FUT46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323FUT46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323FUT46+T?
MAX6323FUT46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323FUT46+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 MAX6323FUT46+T?
For technical support, including MAX6323FUT46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323FUT46+T requirements.
6.How does Aetrix verify that MAX6323FUT46+T is sourced from the original manufacturer or authorized distributors?
All MAX6323FUT46+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 MAX6323FUT46+T meets industry standards.
7.What is the process for return or replacement of MAX6323FUT46+T?
All MAX6323FUT46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323FUT46+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 MAX6323FUT46+T part is unused and in its original packaging.
Return procedure for MAX6323FUT46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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