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Analog Devices Inc./Maxim Integrated MAX6824TUK-T
- Part No.:
- MAX6824TUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6824TUK-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,800
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Product details
Overview
MAX6824TUK-T from Maxim Integrated is a low-voltage microprocessor supervisory IC in 5-pin SOT23 package, combining voltage monitoring (3.08V threshold), watchdog timer (1.6s timeout), and dual push-pull reset outputs (RESET and RESET). It asserts reset during power-up, brownout, or software hang, with guaranteed operation down to VCC = +1.0V. Used in portable equipment, embedded controllers, and intelligent instruments for reliable µP startup and fault recovery.
For engineers reviewing the MAX6824TUK-T datasheet, MAX6824TUK-T pinout, MAX6824TUK-T application, or MAX6824TUK-T equivalent, this page delivers verified electrical specs, pin-level circuit roles, real-world use cases, and validated alternative parts - all confirmed for the exact MAX6824TUK-T variant with T-suffix (3.08V threshold, -40°C to +125°C, lead-free).
Technical Context
The MAX6824TUK-T implements a dual-output supervisory architecture: one active-low push-pull RESET and one active-high push-pull RESET, both asserted synchronously during VCC drop below 3.08V, MR assertion, or watchdog timeout. Its internal 1.6s watchdog timer clears on any WDI edge and remains disabled if WDI is left unconnected.
Reset assertion is guaranteed valid down to VCC = +1.0V, with 140ms minimum timeout after VCC recovery. The device requires no external components, features 60ppm/°C threshold temperature coefficient, and tolerates negative VCC transients ≤20µs at 100mV overdrive - enabling robust operation in noisy, battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±3% (VCC falling); enables precise brownout detection for 3.3V systems |
| Reset Timeout Period | 140ms min; ensures µP completes power stabilization before release |
| Watchdog Timeout | 1.6s nominal; provides sufficient margin for firmware execution loops |
| VCC Operating Range | +1.2V to +5.5V (-40°C to +125°C); supports single-supply operation across logic families |
| Supply Current | 25µA max at +125°C, VCC = +3.6V; minimizes battery drain in portable designs |
| Reset Output Drive | Push-pull RESET (low) and RESET (high); eliminates need for external pull resistors |
| Watchdog Input Sensitivity | Detects ≥50ns pulses; compatible with standard GPIO toggle timing |
Pinout & Package
Package: 5-pin SOT23-5 (U5-1 outline), RoHS-compliant, surface-mount, footprint land pattern 21-0057.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output asserted low during fault; drives µP reset pin directly without pull-up |
| 2 | GND | Ground reference for all internal comparators and timers; must be low-impedance |
| 3 | WDI | Watchdog input; toggling within 1.6s prevents reset; left open disables watchdog |
| 4 | RESET (active-high) | Push-pull output asserted high during fault; interfaces with logic requiring active-high reset enable |
| 5 | VCC | Supply and monitored voltage input; powers internal circuitry and sets reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull reset outputs | Eliminates external pull resistors and supports both active-low and active-high µP reset inputs simultaneously |
| No external components required | Reduces BOM count and PCB area; simplifies layout for space-constrained portable designs |
| Guaranteed reset validity to VCC = +1.0V | Ensures fail-safe reset assertion even during deep brownout or battery sag conditions |
| 1.6s watchdog timeout with edge-triggered clear | Enables flexible firmware integration - any GPIO toggle resets timer, avoiding fixed-interval polling |
| Immunity to ≤20µs negative VCC transients | Prevents spurious resets from switching noise or ESD-induced supply glitches |
Applications
| Set-Top Boxes | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Power sequencing and crash recovery in digital media receivers subject to unstable AC adapters and thermal cycling. IC Role / Device Role / Timing Role: Supervises 3.3V core supply and triggers hardware reset on brownout or software lockup; dual RESET outputs coordinate baseband and video subsystems. Use Value: Prevents frozen UI or corrupted channel tuning by enforcing deterministic restart within 140ms of fault detection. |
Use Scenario: Long-life operation in handheld test meters powered by primary lithium cells with declining voltage profiles. IC Role / Device Role / Timing Role: Monitors main supply at 3.08V threshold to detect end-of-battery life; watchdog guards against sensor readout hangs during low-power sleep cycles. Use Value: Extends usable battery life by maintaining reset integrity down to VCC = +1.0V while consuming only 25µA at full temperature range. |
| Embedded Controllers | Intelligent Instruments |
Use Scenario: Industrial PLC modules operating in wide-temperature environments with variable input power quality. IC Role / Device Role / Timing Role: Provides fail-safe µP reset during line sags or generator switchover; manual reset input allows field service intervention via front-panel button. Use Value: Ensures deterministic boot state after power interruption without requiring external debounce circuitry or supervisor firmware. |
Use Scenario: Precision data loggers performing autonomous measurements in remote locations with intermittent solar charging. IC Role / Device Role / Timing Role: Dual RESET outputs drive separate reset lines for ADC controller and communication SoC; watchdog monitors firmware execution in isolated measurement loop. Use Value: Guarantees synchronized subsystem recovery and prevents data corruption from partial initialization sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6822TUK-T | Single open-drain RESET output; no RESET output; identical 3.08V threshold and 1.6s watchdog | Lacks active-high reset capability; requires external pull-up for RESET signal generation | Select when system uses only active-low reset and board space permits pull-up resistor |
| MAX6315US308D3+ | Single push-pull RESET; no watchdog timer; same 3.08V threshold and SOT23-5 package | Provides basic voltage monitoring only; no software hang protection or dual-output flexibility | Select when watchdog functionality is handled externally or unnecessary for application safety level |
Compared with MAX6824TUK-T, MAX6822TUK-T omits the active-high RESET output but retains watchdog capability, while MAX6315US308D3+ removes watchdog entirely but offers identical threshold accuracy and package compatibility - making each suitable only where their specific feature set matches system-level supervision requirements.
Availability
MAX6824TUK-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX6824TUK-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 power, sensing, and interface applications, with emphasis on reliability and integration for demanding environments.
The MAX6821–MAX6825 family was engineered specifically for low-voltage microprocessor supervision in space- and power-constrained systems, integrating voltage monitoring, watchdog, and dual reset outputs into a single 5-pin SOT23 package.
FAQ
What is the reset threshold voltage for MAX6824TUK-T?
The MAX6824TUK-T has a factory-trimmed reset threshold of 3.08V ±3% (VCC falling), specified over -40°C to +125°C. This value is fixed by the "T" suffix in the part number and is optimized for monitoring 3.3V supply rails in portable and embedded systems where precise brownout detection is critical.
Does MAX6824TUK-T include a manual reset input (MR)?
No, the MAX6824TUK-T does not include a manual reset input. Unlike MAX6821/MAX6822/MAX6823/MAX6825 variants, the MAX6824 series omits the MR pin to dedicate pin 3 exclusively to the WDI function - enabling watchdog-only supervision without manual intervention capability.
What are the functions of the two reset outputs on MAX6824TUK-T?
The MAX6824TUK-T provides two independent push-pull reset outputs: pin 1 (RESET) is active-low and pin 4 (RESET) is active-high. Both assert simultaneously during VCC drop below 3.08V or watchdog timeout, allowing direct connection to µPs or logic that require either polarity without external inversion or pull resistors.
How is the watchdog timer cleared on MAX6824TUK-T?
The watchdog timer in MAX6824TUK-T is cleared on any rising or falling edge at the WDI pin (pin 3). A single GPIO toggle within the 1.6s timeout period resets the timer; leaving WDI unconnected disables the watchdog function entirely, as the internal driver services the timer every 1.4s.
What is the minimum VCC voltage at which MAX6824TUK-T guarantees correct reset output states?
The MAX6824TUK-T guarantees correct reset output states (both RESET and RESET) down to VCC = +1.0V, as confirmed in the Electrical Characteristics table. This ensures fail-safe operation during severe brownout or battery depletion scenarios where other supervisors may lose output control.
MAX6824TUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6824TUK-T FAQ
1.How can I place an order for MAX6824TUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6824TUK-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 MAX6824TUK-T reliable?
The price and inventory of MAX6824TUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6824TUK-T is usually 5 days.
3.What payment methods are accepted for MAX6824TUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6824TUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6824TUK-T?
MAX6824TUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6824TUK-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 MAX6824TUK-T?
For technical support, including MAX6824TUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6824TUK-T requirements.
6.How does Aetrix verify that MAX6824TUK-T is sourced from the original manufacturer or authorized distributors?
All MAX6824TUK-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 MAX6824TUK-T meets industry standards.
7.What is the process for return or replacement of MAX6824TUK-T?
All MAX6824TUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6824TUK-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 MAX6824TUK-T part is unused and in its original packaging.
Return procedure for MAX6824TUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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