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Analog Devices Inc./Maxim Integrated MAX6824LUK-T
- Part No.:
- MAX6824LUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6824LUK-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:22,500
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Product details
Overview
MAX6824LUK-T from Maxim Integrated is a low-voltage microprocessor supervisory IC in 5-pin SOT23 package, combining voltage monitoring (4.63V 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 equipment requiring reliable µP reset control.
For engineers reviewing the MAX6824LUK-T datasheet, MAX6824LUK-T pinout, MAX6824LUK-T application, or MAX6824LUK-T equivalent, this page delivers verified functional identity, exact pin roles, temperature-stable reset threshold (±60 ppm/°C), 140ms minimum reset timeout, and dual active-high/active-low reset signaling - all confirmed for the L-suffix (4.63V) variant at -40°C to +125°C.
Technical Context
The MAX6824LUK-T integrates a precision voltage detector with hysteresis (2×VTH), a 1.6s watchdog timer cleared by WDI edge transitions, and two independent push-pull reset drivers - one active-low (RESET), one active-high (RESET). Its internal 50kΩ MR pullup enables direct switch-to-GND manual reset without external components.
VCC supply current is 30µA max over full temperature range; reset assertion is guaranteed for VCC ≥ +1.0V, and the device tolerates negative VCC transients ≤20µs at 100mV overdrive without spurious reset. No external capacitors or resistors are required for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (L-suffix), ±3% over -40°C to +125°C - sets precise brownout detection point for +5V systems |
| Reset Timeout Period | 140ms min - ensures µP completes power stabilization before release from reset |
| Watchdog Timeout | 1.6s nominal - provides robust software execution monitoring without excessive timeout latency |
| VCC Operating Range | +1.2V to +5.5V - supports operation during deep brownout while maintaining valid reset state |
| Supply Current | 30µA max at -40°C to +125°C - enables use in battery-powered equipment with multi-year standby life |
| Reset Output Drive | Push-pull RESET (active-low) and push-pull RESET (active-high) - eliminates need for external pullups/pulldowns |
| MR Input | Not present - MAX6824LUK-T omits manual reset input per Selector Guide, distinguishing it from MAX6821–MAX6823/MAX6825 |
Pinout & Package
Package: 5-pin SOT23-5 (U5-1 outline), footprint compatible with industry-standard 0.95mm pitch land pattern (Maxim land pattern no. 21-0057).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output - drives low during fault conditions; sinks 3.2mA at VCC ≥ 4.25V |
| 2 | GND | Ground reference - shared return path for all internal circuitry and reset outputs |
| 3 | WDI | Watchdog input - toggling within 1.6s prevents reset; 50ns pulse width minimum; internally biased when floating |
| 4 | RESET | Active-high push-pull reset output - drives high during fault conditions; sources 800µA at VCC ≥ 4.75V |
| 5 | VCC | Supply and monitored voltage input - powers device and serves as reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull reset outputs | Simultaneous active-low and active-high signaling eliminates external level-shifting or pull resistors in mixed-logic systems |
| Watchdog timer with edge-triggered clear | WDI accepts rising/falling edges to reset 1.6s timer - enables flexible software polling or state-based triggering |
| Guaranteed reset validity to VCC = +1.0V | Ensures deterministic reset behavior during severe brownout or battery depletion, critical for portable equipment |
| Immunity to short negative VCC transients | Tolerates ≤20µs, 100mV undershoot without false reset - reduces need for additional VCC filtering in noisy environments |
| No external components required | Integrates voltage reference, timer, and dual drivers in SOT23-5 - minimizes BOM count and PCB area |
Applications
| Set-Top Boxes | Embedded Controllers |
|---|---|
Use Scenario: Power sequencing and firmware crash recovery in consumer digital video receivers subject to unstable AC line and thermal cycling. IC Role / Device Role / Timing Role: Voltage supervisor and watchdog controller - monitors +5V rail and resets ARM-based SoC on brownout or software lockup. Use Value: Prevents frozen UI or corrupted channel tables by enforcing clean reboot within 140ms after VCC recovery, using dual-reset outputs to match SoC's bidirectional reset pin. |
Use Scenario: Industrial PLC modules operating in extended temperature environments (-40°C to +125°C) with infrequent maintenance cycles. IC Role / Device Role / Timing Role: System-level reliability guardian - detects undervoltage on +3.3V logic rail and triggers watchdog reset if main controller fails to service WDI. Use Value: Eliminates need for external RC timing networks; guaranteed reset assertion down to VCC = +1.0V ensures fail-safe behavior even during capacitor aging or cold-start conditions. |
| Intelligent Instruments | Portable/Battery-Powered Equipment |
Use Scenario: Handheld multimeters and data loggers requiring accurate measurement integrity after battery replacement or low-battery shutdown. IC Role / Device Role / Timing Role: Precision voltage monitor and reset coordinator - uses 4.63V threshold to detect end-of-life in alkaline packs and assert both RESET/RESET to initialize ADC and display subsystems. Use Value: Dual push-pull outputs drive separate reset domains (analog front-end and digital core) without cross-coupling risk, improving measurement repeatability. |
Use Scenario: Wearable health monitors powered by single-cell Li-ion batteries with wide discharge curve (4.2V → 3.0V). IC Role / Device Role / Timing Role: Low-power system supervisor - draws only 30µA max over full temp range while monitoring VCC and detecting firmware hangs via WDI. Use Value: Enables >5-year shelf life in standby; 1.6s watchdog timeout balances responsiveness against false triggers from brief RF interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6821LUK-T | Includes manual reset input (MR); single push-pull RESET output; no RESET output | Required where operator-initiated reset (e.g., front-panel button) is mandatory; lacks dual-reset flexibility | Select when MR functionality is needed and only one reset polarity is required |
| MAX6822LUK-T | Includes MR; open-drain RESET output; no RESET output; same watchdog and threshold | Suitable for bidirectional µP reset pins (e.g., Motorola 68HC11); requires external pullup resistor | Select for legacy µP interfaces needing open-drain compatibility and manual reset |
Compared with MAX6824LUK-T, MAX6821LUK-T adds manual reset but removes the active-high RESET output, limiting reset-domain isolation; MAX6822LUK-T trades dual push-pull outputs for open-drain flexibility and MR, increasing BOM count and reducing noise immunity in high-speed systems.
Availability
MAX6824LUK-T is available at Aetrix Electronics and suitable for set-top boxes, embedded controllers, and portable/battery-powered equipment requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.
Supply support for MAX6824LUK-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, computing, and communications applications.
The MAX6821–MAX6825 family targets space-constrained, high-reliability µP systems requiring integrated voltage monitoring, watchdog supervision, and dual-polarity reset signaling - optimized for SOT23-5 footprint and extended temperature operation.
FAQ
What is the reset threshold voltage of the MAX6824LUK-T?
The MAX6824LUK-T has a factory-trimmed reset threshold of 4.63V (L-suffix), with ±3% tolerance over -40°C to +125°C. This value is specified in the Threshold Suffix Guide and confirmed in the Electrical Characteristics table under VTH for MAX682_L. The device asserts reset when VCC falls below this threshold and holds reset for ≥140ms after VCC rises above it. The MAX6824LUK-T does not include hysteresis adjustment pins - hysteresis is fixed at 2×VTH.
Does the MAX6824LUK-T include a manual reset input (MR)?
No, the MAX6824LUK-T does not include a manual reset input. Per the Selector Guide and Pin Description table, MR is present on MAX6821–MAX6823 and MAX6825, but omitted on MAX6824. Pin 3 on the MAX6824LUK-T is WDI (watchdog input), not MR. This distinguishes MAX6824LUK-T as a watchdog-and-dual-reset variant optimized for automated supervision without user intervention.
What are the functions of the two reset outputs on the MAX6824LUK-T?
The MAX6824LUK-T provides two independent push-pull reset outputs: pin 1 is RESET (active-low), and pin 4 is RESET (active-high). During fault conditions (VCC < 4.63V, WDI timeout), RESET goes low while RESET goes high - enabling simultaneous reset of mixed-logic domains (e.g., driving both an active-low µP reset pin and an active-high FPGA configuration pin). Both outputs are fully specified for sink/source current and voltage levels across the full operating range.
How does the watchdog timer on the MAX6824LUK-T operate?
The MAX6824LUK-T watchdog timer has a nominal timeout period of 1.6s. It is cleared by any rising or falling edge on the WDI pin (pin 3); static high or low states longer than 1.6s trigger reset. The timer is also automatically cleared when reset is asserted. WDI accepts pulses as short as 50ns and draws ≤160µA when driven high. Leaving WDI unconnected disables the watchdog, as the internal driver services the timer every ~1.4s.
Is the MAX6824LUK-T suitable for operation at VCC = +1.2V?
Yes, the MAX6824LUK-T is fully specified to operate with VCC as low as +1.2V over the full -40°C to +125°C temperature range, and its reset outputs remain valid down to VCC = +1.0V. This is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. At VCC = +1.2V, supply current is ≤30µA, RESET output low voltage is ≤0.3V at 1µA sink, and RESET output high voltage is ≥0.8×VCC - ensuring interoperability with ultra-low-voltage logic families.
MAX6824LUK-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:
- 4.63V
- 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
MAX6824LUK-T FAQ
1.How can I place an order for MAX6824LUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6824LUK-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 MAX6824LUK-T reliable?
The price and inventory of MAX6824LUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6824LUK-T is usually 5 days.
3.What payment methods are accepted for MAX6824LUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6824LUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6824LUK-T?
MAX6824LUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6824LUK-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 MAX6824LUK-T?
For technical support, including MAX6824LUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6824LUK-T requirements.
6.How does Aetrix verify that MAX6824LUK-T is sourced from the original manufacturer or authorized distributors?
All MAX6824LUK-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 MAX6824LUK-T meets industry standards.
7.What is the process for return or replacement of MAX6824LUK-T?
All MAX6824LUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6824LUK-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 MAX6824LUK-T part is unused and in its original packaging.
Return procedure for MAX6824LUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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