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Analog Devices Inc./Maxim Integrated MAX6822ZUK+T
- Part No.:
- MAX6822ZUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6822ZUK+T.pdf
- Description:
- IC MPU SUPERVISOR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,542
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Product details
Overview
MAX6822ZUK+T from Maxim Integrated is a low-voltage microprocessor supervisory IC in 5-pin SOT23 package, featuring open-drain active-low RESET output, 2.32V reset threshold (Z suffix), 140ms minimum reset timeout, 1.6s watchdog timeout, and manual reset input - used to ensure reliable power-up/brownout recovery in embedded controllers and portable equipment.
For engineers reviewing the MAX6822ZUK+T datasheet, MAX6822ZUK+T pinout, MAX6822ZUK+T application, or MAX6822ZUK+T equivalent, this page delivers verified functional identity, exact pin roles, real-world timing behavior, supply-voltage margin at VCC = +1.0V, and validated alternatives for µP reset supervision in space-constrained industrial and battery-powered systems.
Technical Context
The MAX6822ZUK+T implements a voltage-monitoring comparator with 2.32V ±1.5% threshold (–40°C to +125°C), an internal 140ms reset timeout timer, and a 1.6s watchdog timer that clears on WDI edge transitions. Its open-drain RESET output supports bidirectional µP reset I/O interfaces without external pull-up conflicts.
It integrates a debounced manual reset input (MR) with 50kΩ internal pull-up, glitch rejection of 100ns, and MR-to-reset delay of 200ns. The device guarantees valid reset assertion down to VCC = +1.0V and tolerates negative VCC transients ≤20µs at 100mV overdrive without spurious triggering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V ±1.5% (Z suffix); ensures accurate brownout detection for 2.5V/3.3V system rails |
| Reset Timeout Period | 140ms min (100–320ms over temp); holds µP in reset long enough for stable clock and supply settling |
| Watchdog Timeout | 1.6s nominal (0.8–2.6s over temp); provides robust software execution monitoring for embedded firmware |
| RESET Output Type | Open-drain active-low; enables wired-OR reset bus and direct interface to bidirectional µP reset pins |
| VCC Operating Range | +1.2V to +5.5V (–40°C to +125°C); supports operation during deep brownout and ultra-low-power wake-up |
| Supply Current | 25µA max at +125°C (VCC = +3.6V); minimizes quiescent load in battery-backed systems |
| MR Input Logic | Active-low with 0.3×VCC VIL / 0.7×VCC VIH; compatible with CMOS and open-drain drivers without level shifters |
Pinout & Package
Package: 5-pin SOT23-5 (U5-1 outline, 21-0057 land pattern), RoHS-compliant, surface-mount, footprint-compatible with industry-standard 5-lead SOT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (open-drain) | Active-low reset output; requires external pull-up; asserts low on VCC drop, MR low, or watchdog timeout |
| 2 | GND | Ground reference for all internal comparators, timers, and I/O; must be low-impedance return path |
| 3 | MR (manual reset) | Active-low input with 50kΩ internal pull-up; initiates reset when pulled to GND; no external debounce needed |
| 4 | WDI (watchdog input) | Edge-sensitive input; toggling within 1.6s prevents reset; left floating or high-Z disables watchdog function |
| 5 | VCC | Supply and monitored voltage rail; powers internal circuitry and serves as reset threshold reference source |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = +1.0V | Enables reliable reset assertion during deep brownout or ultra-low-VCC wake-up sequences |
| No external components required | Reduces BOM count and PCB area; eliminates discrete RC networks for reset timing or debounce |
| Immunity to short negative VCC transients | Prevents false resets from <20µs, 100mV VCC glitches - critical for noisy industrial power environments |
| Debounced MR input with internal 50kΩ pull-up | Supports direct switch-to-GND connection; eliminates need for external R/C or Schmitt-trigger buffers |
| Open-drain RESET with 1µA leakage max | Allows safe sharing of reset bus across multiple supervisors or µPs; avoids contention on bidirectional reset lines |
Applications
| Set-Top Boxes | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Power sequencing and brownout recovery during HDMI hot-plug or tuner voltage fluctuations. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low open-drain RESET to hold main SoC in known state until 3.3V/1.8V rails stabilize. Use Value: Prevents corrupted firmware execution during transient AC line dips or adapter switching events. |
Use Scenario: Low-power sleep/wake cycles in handheld medical monitors with coin-cell backup. IC Role / Device Role / Timing Role: Voltage monitor and watchdog enforcing 140ms reset hold time and 1.6s firmware liveness check. Use Value: Guarantees µP restart after battery voltage sag below 2.32V while consuming only 25µA at +125°C. |
| Embedded Controllers | Intelligent Instruments |
Use Scenario: Industrial PLC I/O module subjected to 24V field-side transients coupling into 3.3V logic rail. IC Role / Device Role / Timing Role: Reset supervisor detecting VCC droop and suppressing false triggers via 20µs glitch immunity. Use Value: Maintains deterministic reset behavior despite EMI-induced VCC noise, avoiding spurious reboots. |
Use Scenario: Lab-grade multimeter with auto-ranging ADC and EEPROM calibration storage. IC Role / Device Role / Timing Role: Manual reset input (MR) tied to front-panel button; open-drain RESET shared with µP and EEPROM write-enable logic. Use Value: Enables field-serviceable recalibration via hardware reset without requiring firmware intervention or debug port access. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6822TUK+T | 3.08V reset threshold (T suffix); otherwise identical pinout, timing, and features | Targeted at 3.3V systems instead of 2.5V/low-voltage rails; higher threshold reduces sensitivity to ripple | Select when monitoring 3.3V supplies where 2.32V threshold would cause premature reset assertion |
| TPS3808G18DBVR | Push-pull RESET output; 1.8V threshold; 200ms reset timeout; TI BiCMOS process | Lacks watchdog and manual reset inputs; designed for simpler reset-only use cases | Choose when watchdog and MR functions are unnecessary and push-pull drive simplifies board routing |
Compared with MAX6822ZUK+T, MAX6822TUK+T offers higher reset threshold for 3.3V stability but same open-drain flexibility, while TPS3808G18DBVR trades watchdog/MR capability for lower cost and push-pull simplicity - making each suitable for distinct reliability and feature requirements in µP supervision.
Availability
MAX6822ZUK+T is available at Aetrix Electronics and suitable for set-top boxes, portable/battery-powered equipment, and embedded controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6822ZUK+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, mixed-signal, and power-management ICs for industrial, computing, and communications applications.
The MAX682x family targets low-voltage microprocessor supervision in space-constrained systems, delivering integrated voltage monitoring, watchdog, and manual reset in minimal 5-pin SOT23 footprint.
FAQ
What is the exact reset threshold voltage of MAX6822ZUK+T?
The MAX6822ZUK+T has a factory-trimmed reset threshold of 2.32V, specified with ±1.5% tolerance over –40°C to +125°C. This value is confirmed in the Threshold Suffix Guide and Electrical Characteristics table of the official datasheet. The Z suffix unambiguously denotes 2.32V, and the MAX6822ZUK+T maintains this threshold across its full operating temperature range without external calibration.
Does MAX6822ZUK+T include a watchdog timer and manual reset input?
Yes, the MAX6822ZUK+T includes both a 1.6s watchdog timer (with WDI input on Pin 4) and an active-low manual reset input (MR on Pin 3), as explicitly stated in the General Description and Selector Guide. These functions are shared across MAX6821/MAX6822/MAX6823/MAX6825 variants - confirming that MAX6822ZUK+T fully supports both features in its 5-pin SOT23 configuration.
What is the RESET output type of MAX6822ZUK+T, and why does it matter?
The MAX6822ZUK+T features an open-drain active-low RESET output (Pin 1), distinguishing it from push-pull variants like MAX6821 or MAX6823. This allows wired-OR connection to shared reset buses and direct interfacing with bidirectional µP reset pins (e.g., Motorola 68HC11), eliminating contention risks. The open-drain design requires an external pull-up resistor, which is a deliberate architectural choice for system-level reset arbitration - a key specification confirmed in the Pin Description and Applications Information sections.
Can MAX6822ZUK+T operate reliably at VCC = +1.0V?
Yes, the MAX6822ZUK+T guarantees valid reset assertion down to VCC = +1.0V, as documented in the General Description and Electrical Characteristics. This ensures deterministic reset behavior during ultra-low-voltage conditions such as battery depletion or deep brownout - a critical capability not shared by many competing supervisors. The MAX6822ZUK+T maintains correct RESET state and internal timing integrity even at this minimum supply voltage.
What package and footprint does MAX6822ZUK+T use?
The MAX6822ZUK+T uses a 5-pin SOT23-5 package (outline U5-1, land pattern 21-0057), as specified in the Package Information section and Pin Configurations diagram. This is a standard, surface-mount, RoHS-compliant package with 0.95mm pitch and defined thermal pad layout. The "UK" in the part number explicitly denotes the SOT23-5 variant, and the "+T" suffix confirms lead-free compliance - all verified against Maxim's official ordering information and package drawings.
MAX6822ZUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.32V
- Output:
- Open Drain or Open Collector
- Reset:
- 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
MAX6822ZUK+T FAQ
1.How can I place an order for MAX6822ZUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6822ZUK+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 MAX6822ZUK+T reliable?
The price and inventory of MAX6822ZUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6822ZUK+T is usually 5 days.
3.What payment methods are accepted for MAX6822ZUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6822ZUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6822ZUK+T?
MAX6822ZUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6822ZUK+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 MAX6822ZUK+T?
For technical support, including MAX6822ZUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6822ZUK+T requirements.
6.How does Aetrix verify that MAX6822ZUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6822ZUK+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 MAX6822ZUK+T meets industry standards.
7.What is the process for return or replacement of MAX6822ZUK+T?
All MAX6822ZUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6822ZUK+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 MAX6822ZUK+T part is unused and in its original packaging.
Return procedure for MAX6822ZUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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