My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6324FUT31-T
- Part No.:
- MAX6324FUT31-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6324FUT31-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,793
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6324FUT31-T from Maxim Integrated is an open-drain microprocessor supervisory IC with windowed (min/max) watchdog, 3.08V ±2.5% reset threshold, 23ms fast and 47ms slow watchdog timeout windows, and guaranteed RESET validity down to VCC = +1.2V. It monitors power supply integrity and processor activity in automotive control units, industrial PLCs, and medical diagnostic equipment.
For engineers reviewing the MAX6324FUT31-T datasheet, MAX6324FUT31-T pinout, MAX6324FUT31-T application, or MAX6324FUT31-T equivalent, key selection criteria include its factory-trimmed dual-window watchdog timing, open-drain RESET/WDPO outputs compatible with bidirectional μP reset pins, low 23µA typical supply current, and AEC-Q100-qualified operation over –40°C to +125°C.
Technical Context
The MAX6324FUT31-T implements a laser-trimmed windowed watchdog that detects both fast faults (WDI falling edges <23ms apart) and slow faults (no WDI edge >47ms), with WDPO pulsed low for 1ms on fault detection. Its reset comparator guarantees assertion down to VCC = +1.2V and holds RESET active for ≥100ms after VCC recovery and MR deassertion.
It features debounced manual reset input (MR) with internal 50–85kΩ pullup, glitch immunity of 100ns at VCC = 2.5V, and operates across full 1.2V–5.5V supply range. The device uses BiCMOS process (1371 transistors) and supports level-shifting via open-drain outputs tied to independent supply rails up to +6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±2.5% (nominal 3.1V); ensures reliable brownout detection for +3.3V systems |
| Fast Watchdog Timeout | 23ms (min), 39ms (max); triggers WDPO pulse if WDI edges occur too rapidly |
| Slow Watchdog Timeout | 47ms (min), 63ms (max); triggers WDPO pulse if WDI edges are too infrequent |
| Supply Current | 23µA typical at VCC = 2.5V/3.3V; enables ultra-low-power operation in battery-backed systems |
| RESET Timeout Delay | 100ms minimum; guarantees stable processor initialization after power recovery |
| Operating Temperature | –40°C to +125°C; qualified for under-hood automotive and industrial embedded environments |
| VCC Range | 1.2V to 5.5V; supports valid RESET output even during deep brownout conditions |
Pinout & Package
MAX6324FUT31-T is housed in a 6-pin SOT23 package (package code U6+1A, outline 21-0058), with 1.3mm × 2.2mm footprint and 0.95mm height. 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 (50–85kΩ); asserts RESET and clears watchdog timer when low ≥1µs |
| 2 - GND | Ground reference | Common return path for all internal circuitry; requires low-impedance connection to system ground plane |
| 3 - WDI | Watchdog input | Falling-edge-triggered; resets internal watchdog timer; rejects <100ns glitches at VCC = 2.5V |
| 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 to any rail ≤+6V |
| 6 - RESET | Active-low open-drain reset output | Asserted when VCC <3.08V or MR low; requires external pullup; compatible with bidirectional μP reset pins |
Key Features
| Feature | Design Value |
|---|---|
| Windowed (min/max) watchdog | Detects both premature and delayed WDI pulses-critical for safety-critical firmware execution monitoring |
| Laser-trimmed thresholds | ±2.5% accuracy on 3.08V reset and factory-set 23ms/47ms watchdog windows eliminates external calibration |
| Open-drain RESET & WDPO | Enables level-shifting and wired-OR reset arbitration across multiple supplies or processors |
| Debounced MR input | Internal pullup and 100ns glitch rejection allow direct switch connection without external RC network |
| Valid RESET down to VCC = +1.2V | Ensures deterministic reset state during deep brownout-prevents undefined μP behavior before full power loss |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply and software execution in engine management systems subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout protection, and windowed watchdog supervision of main MCU firmware loop. Use Value: Prevents unsafe ECU operation during voltage sags by asserting RESET before VCC drops below 3.08V, and triggers WDPO on stuck-loop faults to initiate fail-safe shutdown. |
Use Scenario: Ensures deterministic startup and runtime integrity of ARM-based PLC controllers operating in factory-floor environments with EMI and supply ripple. IC Role / Device Role / Timing Role: Dual-role supervisor: VCC monitor for power sequencing and windowed watchdog for real-time task scheduler validation. Use Value: Guarantees ≥100ms reset hold time after power recovery and detects both fast (23ms) and slow (47ms) deviations in watchdog pulse timing-critical for SIL-2 functional safety compliance. |
| Medical Patient Monitor | Embedded Telematics Module |
Use Scenario: Secures boot sequence and runtime health of FPGA-based vital-sign processing unit in portable diagnostic devices with battery backup. IC Role / Device Role / Timing Role: Power supervisor and watchdog co-processor interfacing with FPGA's bidirectional reset pin via open-drain RESET. Use Value: Enables level-shifted reset signaling between 3.3V FPGA domain and 5V analog front-end; maintains valid RESET output down to VCC = +1.2V during battery depletion. |
Use Scenario: Provides fault-resilient reset and watchdog supervision for LTE modem + GPS SoC in vehicle telematics gateways exposed to wide temperature swings. IC Role / Device Role / Timing Role: System-level supervisor detecting both supply instability (via 3.08V threshold) and firmware hang (via 23ms/47ms windowed watchdog). Use Value: WDPO pulse can be routed to SoC NMI pin for non-maskable error handling, while RESET ensures full cold restart-reducing field failure rates in unattended deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324HUT31-T | Same 3.08V reset threshold but 719ms/1.3s watchdog windows instead of 23ms/47ms | Suitable for slower-firmware applications (e.g., HVAC controllers), not real-time ECU/PLC | Select only if longer watchdog timeouts match firmware loop timing requirements |
| TPS3808G33DBVR | Fixed 3.3V reset threshold, single-stage (non-windowed) watchdog, 200ms min timeout | Lacks min/max watchdog capability; cannot detect premature WDI pulses | Use where cost sensitivity outweighs need for advanced watchdog fault discrimination |
Compared with MAX6324FUT31-T, MAX6324HUT31-T offers extended watchdog timing unsuitable for fast-response systems, while TPS3808G33DBVR lacks windowed watchdog functionality entirely-making MAX6324FUT31-T the only option supporting both early- and late-fault detection in safety-critical 3.3V embedded designs.
Availability
MAX6324FUT31-T is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and medical patient monitors requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6324FUT31-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 MAX6324 series belongs to Maxim's μP supervisory circuits product line, engineered specifically for systems requiring simultaneous power monitoring and sophisticated windowed watchdog supervision of real-time firmware execution.
FAQ
What is the exact reset threshold voltage of MAX6324FUT31-T?
The MAX6324FUT31-T has a nominal reset threshold of 3.08V with ±2.5% accuracy over –40°C to +125°C, corresponding to the "31" suffix per Maxim's ordering convention. This value is laser-trimmed at wafer test and guaranteed across full temperature range, making it suitable for precise monitoring of +3.3V supply rails in automotive and industrial applications.
Does MAX6324FUT31-T support bidirectional microprocessor reset pins?
Yes, MAX6324FUT31-T supports bidirectional μP reset pins because its RESET output is open-drain. When used with a single external pullup resistor, either the MAX6324FUT31-T or the μP can assert reset-enabling shared reset arbitration in multi-processor systems like motor control gateways or redundant PLC modules.
What are the watchdog timeout values for MAX6324FUT31-T?
MAX6324FUT31-T features factory-trimmed dual-window watchdog timing: fast timeout of 23ms (min) / 39ms (max), and slow timeout of 47ms (min) / 63ms (max). These values correspond to the "F" suffix and are measured from the last falling edge of WDI, enabling detection of both premature and delayed watchdog pulses in real-time firmware loops.
Can MAX6324FUT31-T operate with supply voltages below 3.0V?
Yes, MAX6324FUT31-T operates from VCC = 1.2V to 5.5V and guarantees valid RESET output down to VCC = +1.2V. Below this voltage, the internal circuitry ceases sinking current, but the 3.08V reset threshold remains accurate across the full 1.2V–5.5V range-enabling robust brownout detection in battery-powered or low-voltage embedded systems.
Is MAX6324FUT31-T qualified for automotive applications?
MAX6324FUT31-T is specified for –40°C to +125°C operation and meets AEC-Q100 stress testing requirements as documented in Maxim's qualification reports. While the "/V" suffix denotes explicitly automotive-qualified variants (e.g., MAX6324HUT44/V+T), the MAX6324FUT31-T shares identical process, packaging, and characterization-making it widely deployed in automotive ECU and telematics modules.
MAX6324FUT31-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:
- 3.08V
- Output:
- Open Drain or Open Collector
- 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
MAX6324FUT31-T FAQ
1.How can I place an order for MAX6324FUT31-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6324FUT31-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 MAX6324FUT31-T reliable?
The price and inventory of MAX6324FUT31-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6324FUT31-T is usually 5 days.
3.What payment methods are accepted for MAX6324FUT31-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6324FUT31-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6324FUT31-T?
MAX6324FUT31-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6324FUT31-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 MAX6324FUT31-T?
For technical support, including MAX6324FUT31-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6324FUT31-T requirements.
6.How does Aetrix verify that MAX6324FUT31-T is sourced from the original manufacturer or authorized distributors?
All MAX6324FUT31-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 MAX6324FUT31-T meets industry standards.
7.What is the process for return or replacement of MAX6324FUT31-T?
All MAX6324FUT31-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6324FUT31-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 MAX6324FUT31-T part is unused and in its original packaging.
Return procedure for MAX6324FUT31-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6324FUT31-T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
