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Analog Devices Inc./Maxim Integrated MAX6824SUK-T
- Part No.:
- MAX6824SUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6824SUK-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6824SUK-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 set-top boxes, embedded controllers, and portable battery-powered equipment.
For engineers reviewing the MAX6824SUK-T datasheet, MAX6824SUK-T pinout, MAX6824SUK-T application, or MAX6824SUK-T equivalent, this page delivers verified circuit role, exact reset threshold, watchdog timing, dual-reset behavior, and validated alternatives for critical µP monitoring designs.
Technical Context
The MAX6824SUK-T integrates a precision voltage detector with 3.08V ±3% threshold (suffix "T"), a 1.6s watchdog timer cleared by WDI edge transitions, and two independent push-pull reset outputs: active-low RESET and active-high RESET. Reset assertion is triggered by VCC drop below threshold, manual reset via MR input (not present on MAX6824), or watchdog timeout.
Unlike MAX6821–MAX6823/MAX6825, the MAX6824SUK-T omits the manual reset input (MR) but retains WDI and both reset outputs. Its reset timeout period is 140ms (min), and it guarantees valid reset state down to VCC = +1.0V - enabling reliable supervision in ultra-low-voltage brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±3% - precisely monitors +3.3V supply rails with built-in hysteresis to prevent chatter during voltage recovery. |
| Reset Timeout Period | 140ms (min) - ensures µP remains held in reset long enough for stable power rail settling after brownout recovery. |
| Watchdog Timeout | 1.6s nominal - detects firmware hangs in embedded controllers without requiring external timing components. |
| Supply Voltage Range | +1.2V to +5.5V (–40°C to +125°C) - supports operation across wide input range including deep brownout conditions. |
| Reset Output Types | Dual push-pull: active-low RESET and active-high RESET - eliminates need for external pull-ups or inverters in bidirectional reset interfaces. |
| WDI Input Sensitivity | Detects ≥50ns pulses - allows robust watchdog triggering even with noisy or slow-rising µP I/O signals. |
| ICC (VCC = +3.6V) | 7–25µA (–40°C to +125°C) - enables ultra-low-power supervision in battery-backed portable instrumentation. |
Pinout & Package
Package: 5-pin SOT23-5 (U5-1 outline), footprint compatible with industry-standard land pattern 21-0057. RoHS-compliant, lead(Pb)-free version ordered as MAX6824SUK+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output asserted low during VCC undervoltage, watchdog timeout, or MR event - directly drives µP reset pin without pull-up. |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers - must be low-impedance connection to system ground plane. |
| 3 | WDI | Watchdog input accepting CMOS-level edges; toggling within 1.6s prevents reset - left unconnected to disable watchdog function. |
| 4 | RESET (active-high) | Push-pull output asserted high during fault conditions - provides complementary signal for logic-level monitoring or status LEDs. |
| 5 | VCC | Supply input and monitored voltage source - powers internal circuitry and feeds threshold detector; operates down to +1.0V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull reset outputs | Eliminates external pull-up resistors and level-shifters - simplifies interface to µPs with bidirectional or active-high reset pins. |
| Guaranteed reset validity to VCC = +1.0V | Ensures deterministic reset assertion during deep brownout - critical for data integrity in portable/battery-powered equipment. |
| No external components required | Reduces BOM count and PCB area - integrates voltage detection, timing, and drive capability in single 5-pin SOT23 device. |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV VCC glitches without false reset - improves reliability in electrically noisy industrial environments. |
| 1.6s watchdog timeout with 50ns pulse detection | Enables precise firmware execution monitoring - detects stuck loops even with minimal µP I/O toggle overhead. |
Applications
| Set-Top Boxes | Embedded Controllers |
|---|---|
Use Scenario: Power sequencing and firmware crash recovery in digital video receivers subject to unstable AC line and thermal cycling. IC Role / Device Role / Timing Role: Supervisory IC providing voltage-monitored reset and watchdog-triggered recovery to prevent frozen UI or corrupted channel tables. Use Value: Dual RESET/RESET outputs enable simultaneous reset of main SoC and auxiliary audio/video processors without additional logic. |
Use Scenario: Industrial PLC modules operating in extended temperature ranges with intermittent power interruptions. IC Role / Device Role / Timing Role: Critical µP monitor ensuring deterministic restart after brownout, with watchdog guarding against control-loop lockup. Use Value: 140ms minimum reset timeout guarantees full capacitor discharge and regulator stabilization before µP release. |
| Intelligent Instruments | Portable/Battery-Powered Equipment |
Use Scenario: Handheld multimeters and data loggers requiring accurate measurement retention during battery swap or low-VCC events. IC Role / Device Role / Timing Role: Low-voltage supervisor asserting reset before ADC reference collapse, preserving calibration memory integrity. Use Value: Guaranteed reset operation down to VCC = +1.0V prevents spurious readings during gradual battery depletion. |
Use Scenario: Wearable health monitors powered by single-cell Li-ion batteries experiencing voltage sag under load. IC Role / Device Role / Timing Role: Supervisor detecting 3.08V threshold crossing to initiate graceful shutdown or sleep-mode entry before cutoff. Use Value: 7–25µA quiescent current extends battery life while maintaining continuous watchdog supervision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6822SUK-T | Same 3.08V threshold and 5-pin SOT23, but features open-drain RESET (not push-pull) and includes MR input - no active-high RESET output. | Suitable where bidirectional µP reset pins require open-drain interface and manual reset is needed - not compatible for dual-push-pull signal routing. | Select MAX6822SUK-T only if system requires MR functionality and can accommodate external pull-up on RESET; MAX6824SUK-T is superior when dual native-level reset signals are needed. |
| MAX6316LUK-T | Single push-pull RESET, 3.08V threshold, no watchdog or WDI - lower ICC (1.5µA), wider temp range (–40°C to +125°C), same SOT23-5 package. | Applicable where watchdog is unnecessary and ultra-low power dominates - lacks dual-reset capability and fault-detection redundancy. | Choose MAX6316LUK-T for cost-sensitive, static-firmware applications without runtime supervision needs; MAX6824SUK-T adds watchdog safety for dynamic embedded code. |
Compared with MAX6822SUK-T and MAX6316LUK-T, the MAX6824SUK-T uniquely delivers both active-low and active-high push-pull reset outputs without external components while retaining watchdog supervision - making it optimal for systems requiring fail-safe restart coordination across multiple voltage domains.
Availability
MAX6824SUK-T is available at Aetrix Electronics and suitable for set-top boxes, embedded controllers, and portable/battery-powered equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for MAX6824SUK-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX6821–MAX6825 family was designed specifically for low-voltage microprocessor supervision in space-constrained, thermally demanding applications - emphasizing accuracy, low power, and integrated fault coverage (voltage + watchdog).
FAQ
What is the exact reset threshold voltage of the MAX6824SUK-T?
The MAX6824SUK-T has a factory-trimmed reset threshold of 3.08V ±3% over –40°C to +125°C, corresponding to suffix "T" in the ordering code. This value is specified in the Electrical Characteristics table under VTH for MAX682_T, with min/typ/max values of 2.97V/3.08V/3.17V at full temperature range - ensuring precise monitoring of +3.3V supply rails.
Does the MAX6824SUK-T include a manual reset input (MR)?
No, the MAX6824SUK-T does not include a manual reset input. Per the Selector Guide and Pin Description, MR is present on MAX6821/MAX6822/MAX6823/MAX6825 but explicitly omitted from MAX6824. The MAX6824SUK-T relies solely on VCC monitoring and watchdog timeout for reset generation - confirmed by pin function table showing no MR assignment on pin 3.
What are the key differences between RESET and RESET outputs on the MAX6824SUK-T?
On the MAX6824SUK-T, RESET is an active-low push-pull output that goes low during fault conditions, while RESET is an active-high push-pull output that goes high simultaneously. Both are driven natively - no external components needed. Their complementary logic states simplify interfacing to µPs with either reset polarity requirement, and both remain asserted for the full 140ms reset timeout period.
How is the watchdog timer on the MAX6824SUK-T enabled or disabled?
The watchdog timer on the MAX6824SUK-T is enabled by driving the WDI pin with periodic edges (rising or falling) within the 1.6s timeout window. It is disabled by leaving WDI unconnected - the internal driver then cycles low/high every ~1.4s, preventing timeout. No configuration register or external component is required; behavior is purely hardware-determined by WDI pin state.
Is the MAX6824SUK-T compatible with 1.8V supply systems?
Yes, the MAX6824SUK-T operates with VCC as low as +1.2V over its full temperature range and guarantees valid reset output down to +1.0V. While its 3.08V threshold targets +3.3V rails, the device itself functions correctly in 1.8V systems - for example, as a supervisor for auxiliary 1.8V domains where VCC is derived from a separate LDO, provided the monitored rail matches the 3.08V threshold.
MAX6824SUK-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:
- 2.93V
- 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
MAX6824SUK-T FAQ
1.How can I place an order for MAX6824SUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6824SUK-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 MAX6824SUK-T reliable?
The price and inventory of MAX6824SUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6824SUK-T is usually 5 days.
3.What payment methods are accepted for MAX6824SUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6824SUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6824SUK-T?
MAX6824SUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6824SUK-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 MAX6824SUK-T?
For technical support, including MAX6824SUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6824SUK-T requirements.
6.How does Aetrix verify that MAX6824SUK-T is sourced from the original manufacturer or authorized distributors?
All MAX6824SUK-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 MAX6824SUK-T meets industry standards.
7.What is the process for return or replacement of MAX6824SUK-T?
All MAX6824SUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6824SUK-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 MAX6824SUK-T part is unused and in its original packaging.
Return procedure for MAX6824SUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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