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Analog Devices Inc./Maxim Integrated MAX6824SUK
- Part No.:
- MAX6824SUK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6824SUK.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,193
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Product details
Overview
MAX6824SUK from Maxim Integrated is a low-voltage microprocessor supervisory IC in SOT23-5 package, integrating voltage monitoring, watchdog timer, and dual active-low/high push-pull reset outputs-no manual reset input. It monitors VCC from +1.8V to +5.0V with 140ms min reset timeout and 1.6s watchdog timeout, used in embedded controllers and portable equipment requiring reliable power-on reset and software fault recovery.
For engineers reviewing the MAX6824SUK datasheet, MAX6824SUK pinout, MAX6824SUK application, or MAX6824SUK equivalent, this page delivers verified functional identity, exact pin roles, threshold-specific behavior (S-suffix = 2.93V), guaranteed reset validity down to VCC = +1.0V, and real-world design implications for brownout immunity and watchdog integration.
Technical Context
The MAX6824SUK implements a precision bandgap-based voltage monitor with 2.93V ±1.5% reset threshold (S-suffix), hysteresis of 2×VTH, and temperature coefficient of 60ppm/°C. Its internal watchdog timer triggers reset if WDI remains static beyond 1.6s (min 0.8s, max 2.6s over temp), cleared on any WDI edge or reset assertion.
It features two independent push-pull reset outputs: active-low RESET and active-high RESET, both asserted simultaneously during VCC dropout, MR event (not applicable), or watchdog timeout. Reset remains asserted for ≥140ms after VCC recovers above threshold, with propagation delay <20µs and guaranteed operation down to VCC = +1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.5% (S-suffix); ensures reliable detection of 3.3V supply brownout before µP malfunctions |
| Reset Timeout Period | 140ms minimum; guarantees µP remains held in reset long enough for stable power rail recovery |
| Watchdog Timeout | 1.6s nominal (0.8–2.6s over -40°C to +125°C); provides robust software execution monitoring without false triggers |
| VCC Operating Range | +1.2V to +5.5V; supports ultra-low-voltage systems down to 1.2V while maintaining reset validity to +1.0V |
| RESET Output Drive | Push-pull, VOL ≤0.4V @ 3.2mA sink (VCC≥4.75V); eliminates need for external pull-up and ensures clean logic-level signaling |
| WDI Input Sensitivity | Detects edges ≥50ns wide; enables direct connection to µP GPIO without pulse-shaping circuitry |
| Supply Current | ≤30µA at +125°C (VCC=+3.6V); minimizes quiescent power in battery-powered applications |
Pinout & Package
MAX6824SUK uses a 5-pin SOT23-5 package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, Pb-free per RoHS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output asserted low during fault; drives µP /RESET directly without pull-up resistor |
| 2 | GND | Ground reference for all internal circuits and reset timing; must be low-impedance connection |
| 3 | WDI | Watchdog input; rising or falling edge clears 1.6s timer; left floating 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 device and sets reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull reset outputs | Simultaneous active-low and active-high signals eliminate level-shifting or inverters in mixed-logic systems |
| No manual reset input | Reduces BOM count and PCB routing complexity where operator-initiated reset is unnecessary |
| Guaranteed reset validity to VCC = +1.0V | Ensures deterministic reset behavior during deep brownout or battery depletion down to 1.0V |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV VCC glitches without spurious reset-critical in noisy automotive/industrial environments |
| Zero external components required | Integrates voltage reference, timer, comparator, and drivers-reduces footprint and qualification effort |
Applications
| Embedded Controllers | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Industrial PLC controller powered by 3.3V LDO with intermittent brownouts due to shared power bus. IC Role / Device Role / Timing Role: Voltage supervisor asserting both RESET and RESET to hold ARM Cortex-M4 core in known state during rail collapse and recovery. Use Value: Prevents corrupted register writes and flash corruption by enforcing ≥140ms reset hold time after VCC crosses 2.93V threshold. |
Use Scenario: Handheld medical sensor using coin-cell battery; VCC decays gradually from 3.0V to 1.8V during discharge. IC Role / Device Role / Timing Role: Brownout detector triggering graceful shutdown sequence via active-high RESET signal to system PMIC. Use Value: Guarantees reset assertion down to VCC = +1.0V, enabling safe data save and state preservation even at end-of-life battery voltage. |
| Computers and Controllers | Critical µP Monitoring |
Use Scenario: Network switch management MCU booting from SPI flash; requires deterministic power-on reset timing. IC Role / Device Role / Timing Role: Primary supervisory IC generating precise 140ms reset pulse synchronized to 3.3V rail stabilization. Use Value: Eliminates need for RC-based reset generators-ensures repeatable tRP across temperature (-40°C to +125°C). |
Use Scenario: Automotive telematics unit running safety-critical firmware; must recover from infinite loops or lockups. IC Role / Device Role / Timing Role: Watchdog timer monitoring WDI toggles from MCU GPIO; asserts dual reset outputs on timeout. Use Value: 1.6s watchdog period balances responsiveness and tolerance for brief interrupt latency without false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6822SUK | Open-drain RESET output only; no active-high RESET; includes MR input | Requires external pull-up for /RESET; supports manual reset button; same 2.93V threshold and watchdog | Select when bidirectional µP reset pins (e.g., Motorola 68HC11) or hardware reset buttons are needed |
| MAX6315US29D3+ | Single active-low open-drain reset; no watchdog or dual outputs; 2.93V threshold; SOT23-5 | Lacks watchdog and active-high output; lower quiescent current (1.5µA); no WDI or MR pins | Select for cost-sensitive, non-watchdog applications where only basic voltage monitoring is required |
Compared with MAX6824SUK, MAX6822SUK adds manual reset capability but sacrifices the active-high RESET output and uses open-drain architecture requiring external pull-up, while MAX6315US29D3+ reduces functionality to basic reset-only supervision with significantly lower ICC but no fault-detection redundancy.
Availability
MAX6824SUK is available at Aetrix Electronics and suitable for embedded controllers, portable/battery-powered equipment, and critical µP monitoring applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6824SUK 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 harsh environments.
The MAX6821–MAX6825 family was engineered specifically for space-constrained, low-voltage µP systems needing combined voltage monitoring, watchdog, and flexible reset signaling-without external components or layout overhead.
FAQ
What is the exact reset threshold voltage for MAX6824SUK?
The MAX6824SUK has a factory-programmed reset threshold of 2.93V, with tolerance of ±1.5% over -40°C to +125°C. This value corresponds to the 'S' suffix in the part number and is specified in the Electrical Characteristics table under VTH for MAX682_S. The threshold exhibits 60ppm/°C drift and includes 2×VTH hysteresis to prevent chatter near trip point.
Does MAX6824SUK include a manual reset input (MR)?
No, MAX6824SUK does not feature a manual reset input. Per the Selector Guide and Pin Description tables, MAX6824 supports watchdog input (WDI) and dual push-pull reset outputs (RESET and RESET) but omits MR. This distinguishes it from MAX6821/MAX6822/MAX6823/MAX6825, which all include MR. The absence simplifies design where hardware reset buttons are unnecessary.
How does the watchdog timer in MAX6824SUK operate, and what is its timeout range?
The MAX6824SUK watchdog timer asserts reset if WDI remains static (high or low) longer than its timeout period, nominally 1.6s. Over temperature (-40°C to +125°C), this ranges from 0.8s to 2.6s. The timer clears on any WDI edge, reset assertion, or MR event (not applicable here). WDI accepts pulses as narrow as 50ns, and leaving it unconnected disables the watchdog function entirely.
What are the electrical characteristics of the RESET and RESET outputs on MAX6824SUK?
Both RESET (active-low) and RESET (active-high) outputs on MAX6824SUK are push-pull. RESET sinks ≤0.4V at 3.2mA (VCC≥4.75V); RESET sources ≥0.8×VCC at 800µA (VCC≥4.75V). Neither requires external pull resistors. Output drive strength and voltage compliance are guaranteed down to VCC = +1.0V, ensuring interoperability with low-voltage logic families.
Is MAX6824SUK compatible with 1.8V systems, and how does it behave at low VCC?
Yes, MAX6824SUK operates with VCC as low as +1.2V and guarantees correct reset output states down to +1.0V. At 1.8V supply, it monitors against its 2.93V threshold-so it will assert reset continuously until VCC rises above 2.93V. Its internal circuitry remains functional and predictable throughout this range, making it suitable for systems where 1.8V is an intermediate rail, not the monitored supply.
MAX6824SUK 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 FAQ
1.How can I place an order for MAX6824SUK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6824SUK 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 reliable?
The price and inventory of MAX6824SUK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6824SUK is usually 5 days.
3.What payment methods are accepted for MAX6824SUK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6824SUK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6824SUK?
MAX6824SUK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6824SUK 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?
For technical support, including MAX6824SUK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6824SUK requirements.
6.How does Aetrix verify that MAX6824SUK is sourced from the original manufacturer or authorized distributors?
All MAX6824SUK 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 meets industry standards.
7.What is the process for return or replacement of MAX6824SUK?
All MAX6824SUK units undergo pre-shipment inspection (PSI). If there is an issue with MAX6824SUK, 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 part is unused and in its original packaging.
Return procedure for MAX6824SUK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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