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Analog Devices Inc./Maxim Integrated MAX6824ZUK+T
- Part No.:
- MAX6824ZUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6824ZUK+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6824ZUK+T from Maxim Integrated is a low-voltage microprocessor supervisory IC in 5-pin SOT23 package, featuring dual push-pull reset outputs (RESET and RESET), a 1.6s watchdog timer, and a 2.32V reset threshold for +2.5V supply monitoring. It asserts reset during power-up, brownout, or software hang, with guaranteed reset validity down to VCC = +1.0V and 140ms minimum reset timeout.
For engineers reviewing the MAX6824ZUK+T datasheet, MAX6824ZUK+T pinout, MAX6824ZUK+T application, or MAX6824ZUK+T equivalent, key selection criteria include dual active-high/active-low reset capability, watchdog timeout stability over –40°C to +125°C, immunity to short negative VCC transients, and compatibility with battery-powered embedded controllers requiring robust power-on reset sequencing.
Technical Context
The MAX6824ZUK+T integrates voltage monitoring, watchdog supervision, and dual reset signaling in a single BiCMOS device. Its Z-suffix denotes a 2.32V ±3% reset threshold optimized for +2.5V systems, with hysteresis of 2×VTH and temperature coefficient of 60ppm/°C. The watchdog input (WDI) accepts pulses as short as 50ns and clears on any edge or reset assertion.
Unlike MAX6821–MAX6823, the MAX6824ZUK+T omits manual reset (MR) but includes both push-pull RESET (active-low) and push-pull RESET (active-high), enabling direct interface with µPs requiring complementary reset signals. Reset propagation delay is 20µs (VCC falling through VTH −100mV), and output drive strength supports 500µA sink at VCC ≥1.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V ±3% - precisely matches +2.5V rail monitoring with 2.24V to 2.40V tolerance over full temperature range |
| Watchdog Timeout | 1.6s nominal (0.8s–2.6s over –40°C to +125°C) - provides reliable software execution monitoring without excessive timeout margin |
| Reset Timeout Period | 140ms min (100ms–320ms over temp) - ensures stable µP initialization after power recovery |
| VCC Operating Range | +2.1V to +2.75V - validated for +2.5V systems with 10% tolerance; functional down to +1.2V |
| Reset Output Drive | Push-pull RESET (active-low) and RESET (active-high) - eliminates external pull-up/pull-down resistors and supports bidirectional reset I/O |
| Supply Current | 25µA max at +2.75V, –40°C to +125°C - enables ultra-low-power operation in portable/battery-powered equipment |
| Reset Validity | Guaranteed to VCC = +1.0V - ensures deterministic reset behavior during deep brownout conditions |
Pinout & Package
MAX6824ZUK+T uses a 5-pin SOT23-5 package (outline U5-1, land pattern 21-0057), RoHS-compliant with lead-free plating (+T suffix). Pin 1 is RESET (active-low push-pull), Pin 2 is GND, Pin 3 is WDI (watchdog input), Pin 4 is RESET (active-high push-pull), and Pin 5 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives low during fault; no external pull-up needed; interfaces directly with µP reset pins requiring active-low assertion |
| 2 - GND | Ground reference | Common return path for all internal circuits; must be connected to system ground plane for noise immunity |
| 3 - WDI | Watchdog input | Edge-sensitive input; toggling within 1.6s prevents reset; left unconnected disables watchdog function |
| 4 - RESET | Active-high push-pull reset output | Drives high during fault; complements RESET for µPs with dual-polarity reset inputs or logic-level translation needs |
| 5 - VCC | Supply and monitored voltage input | Powers device and serves as monitored rail; valid operation from +2.1V to +2.75V; reset asserted if VCC drops below 2.32V |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull reset outputs | Eliminates need for external level-shifting or pull resistors when interfacing with µPs requiring both active-high and active-low reset signals |
| 1.6s watchdog timer with 50ns pulse detection | Enables precise software hang detection without false triggers from brief noise spikes on WDI line |
| 2.32V reset threshold with 60ppm/°C drift | Ensures accurate +2.5V rail monitoring across industrial temperature range (–40°C to +125°C) without calibration |
| Reset validity to VCC = +1.0V | Guarantees deterministic reset state during deep undervoltage events, critical for data retention in battery-backed systems |
| No external components required | Reduces BOM count and PCB area; simplifies layout for space-constrained embedded controllers and portable instruments |
Applications
| Set-Top Boxes | Embedded Controllers |
|---|---|
Use Scenario: Power sequencing and firmware recovery during cold boot or HDMI hot-plug events. IC Role / Device Role / Timing Role: Voltage supervisor and watchdog timer ensuring µP enters known state before loading bootloader. Use Value: Prevents corrupted channel tuning or video buffer lockup by asserting dual-reset signals synchronized to +2.5V rail stability. | Use Scenario: Industrial PLC modules operating in wide-temperature environments with intermittent power. IC Role / Device Role / Timing Role: Dual-output reset generator and software execution monitor for ARM Cortex-M based control cores. Use Value: Enables fail-safe restart without external logic; 140ms timeout ensures sufficient capacitor discharge time before reinitialization. |
| Intelligent Instruments | Portable/Battery-Powered Equipment |
Use Scenario: Handheld multimeters and oscilloscopes requiring reliable self-test on power-up. IC Role / Device Role / Timing Role: Supervisor for precision ADC and display controller, monitoring +2.5V reference rail. Use Value: 2.32V threshold matches typical 2.5V reference ICs; dual RESET/RESET outputs coordinate analog front-end and digital subsystem reset timing. | Use Scenario: Wearable health monitors powered by single-cell Li-ion batteries with dynamic voltage sag. IC Role / Device Role / Timing Role: Brownout detector and watchdog for ultra-low-power MCU during sleep/wake transitions. Use Value: 25µA max supply current extends battery life; reset validity to +1.0V ensures safe shutdown before EEPROM corruption occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6823ZUK+T | Includes manual reset (MR) input; same 2.32V threshold and dual push-pull outputs; no watchdog timer | Suitable where hardware-initiated reset is required (e.g., front-panel button), but software hang detection is not needed | Select MAX6823ZUK+T only if MR functionality is mandatory and watchdog supervision is unnecessary |
| TPS3808G18DBVR | Single active-low open-drain reset; 1.8V threshold; 200ms timeout; no dual-output or watchdog; TI BiCMOS process | Targeted at simpler +1.8V systems without complementary reset or watchdog requirements | Choose TPS3808G18DBVR for cost-sensitive, low-complexity designs lacking dual-reset or watchdog needs |
Compared with MAX6824ZUK+T, MAX6823ZUK+T adds manual reset but removes watchdog capability, while TPS3808G18DBVR reduces feature set to basic voltage monitoring-making MAX6824ZUK+T uniquely suited for +2.5V systems requiring both watchdog supervision and dual-polarity reset signaling without external components.
Availability
MAX6824ZUK+T is available at Aetrix Electronics and suitable for set-top boxes, embedded controllers, and intelligent instruments requiring stable component supply, long-term lifecycle support, and industrial temperature grade performance.
Supply support for MAX6824ZUK+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 industrial, communications, and consumer applications.
The MAX6821–MAX6825 family delivers compact, low-power µP supervision for space-constrained embedded systems, with emphasis on reliability in battery-powered and wide-temperature environments.
FAQ
What is the exact reset threshold voltage of MAX6824ZUK+T and its tolerance over temperature?
The MAX6824ZUK+T has a nominal reset threshold of 2.32V, with a guaranteed range of 2.24V to 2.40V over the full operating temperature range of –40°C to +125°C. This specification is defined by the Z-suffix in the part number and confirmed in the Electrical Characteristics table under VTH parameter for MAX682_Z. The threshold exhibits a temperature coefficient of 60ppm/°C, ensuring minimal drift across industrial temperatures.
Does MAX6824ZUK+T include a manual reset input (MR)?
No, MAX6824ZUK+T does not include a manual reset input. Unlike MAX6821–MAX6823 and MAX6825, the MAX6824 variant omits the MR pin to accommodate its dual push-pull reset architecture (RESET and RESET) and integrated watchdog timer. Pin 3 is dedicated to WDI only, and no internal pull-up or MR-related circuitry is present in the MAX6824ZUK+T die configuration.
How does the watchdog timer in MAX6824ZUK+T operate, and what is its timeout accuracy?
The MAX6824ZUK+T watchdog timer has a nominal timeout period of 1.6 seconds, with a guaranteed range of 0.80s to 2.60s over –40°C to +125°C. It clears on any rising or falling edge at the WDI pin, or when reset is asserted. The timer remains inactive while reset is active and begins counting only after reset is released. Pulse width detection capability is 50ns minimum, enabling robust noise immunity in electrically noisy environments.
What are the electrical characteristics of the two reset outputs on MAX6824ZUK+T?
MAX6824ZUK+T provides two independent push-pull outputs: RESET (active-low) and RESET (active-high). RESET sinks up to 500µA at VCC ≥1.8V with VOL ≤0.3V; RESET sources up to 500µA at VCC ≥2.55V with VOH ≥0.8×VCC. Both outputs remain valid down to VCC = +1.0V, and neither requires external pull resistors, simplifying interface with µPs having bidirectional or polarity-flexible reset inputs.
Can MAX6824ZUK+T be used in battery-powered applications with supply voltages below 2.5V?
MAX6824ZUK+T is specified for operation with VCC between +2.1V and +2.75V, making it suitable for nominal +2.5V systems including those powered by partially discharged Li-ion or alkaline cells. While it functions down to +1.2V (per Absolute Maximum Ratings), the 2.32V reset threshold means reliable supervision ceases once VCC falls below ~2.24V. For sub-2.1V operation, a different threshold variant (e.g., MAX682_W/V series) or alternative supervisor should be selected.
MAX6824ZUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.32V
- 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
MAX6824ZUK+T FAQ
1.How can I place an order for MAX6824ZUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6824ZUK+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 MAX6824ZUK+T reliable?
The price and inventory of MAX6824ZUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6824ZUK+T is usually 5 days.
3.What payment methods are accepted for MAX6824ZUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6824ZUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6824ZUK+T?
MAX6824ZUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6824ZUK+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 MAX6824ZUK+T?
For technical support, including MAX6824ZUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6824ZUK+T requirements.
6.How does Aetrix verify that MAX6824ZUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6824ZUK+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 MAX6824ZUK+T meets industry standards.
7.What is the process for return or replacement of MAX6824ZUK+T?
All MAX6824ZUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6824ZUK+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 MAX6824ZUK+T part is unused and in its original packaging.
Return procedure for MAX6824ZUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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