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Analog Devices Inc./Maxim Integrated MAX6823ZUK+T
- Part No.:
- MAX6823ZUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6823ZUK+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,118
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Product details
Overview
MAX6823ZUK+T from Maxim Integrated is a low-voltage microprocessor supervisory IC in SOT23-5 package, featuring push-pull active-low RESET output, 2.32V reset threshold (Z suffix), 140ms minimum reset timeout, 1.6s watchdog timer, and debounced manual reset input. It monitors VCC down to +1.0V and ensures reliable µP startup/brownout recovery in portable and embedded systems.
For engineers reviewing the MAX6823ZUK+T datasheet, MAX6823ZUK+T pinout, MAX6823ZUK+T application, or MAX6823ZUK+T equivalent, this device delivers deterministic reset assertion during power-up, brownout, and software fault conditions - critical for battery-powered instrumentation, set-top boxes, and industrial controllers requiring guaranteed VCC-valid reset behavior.
Technical Context
The MAX6823ZUK+T integrates voltage monitoring, watchdog timer, and manual reset into a single 5-pin SOT23 device. Its internal reset generator asserts RESET low when VCC falls below 2.32V (±1.5% over temperature), holding it low for ≥140ms after VCC recovers above threshold. The watchdog circuit triggers reset if WDI remains static beyond 1.6s nominal timeout.
It features an internal 50kΩ MR pullup, supports CMOS-level MR/WDI inputs, and guarantees valid RESET output state down to VCC = +1.0V. The push-pull RESET output drives high (≥0.8×VCC) when deasserted and low (≤0.3V at 500µA sink) when asserted - eliminating external pullup requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V ±1.5% (Z suffix); precise brownout detection for 2.5V/3.3V system rails |
| Reset Timeout Period | 140ms min; ensures µP completes power stabilization before release |
| Watchdog Timeout | 1.6s nominal; detects firmware hangs without requiring external timing components |
| VCC Operating Range | +1.2V to +5.5V (–40°C to +125°C); supports ultra-low-voltage operation down to 1.2V |
| RESET Output Type | Push-pull active-low; eliminates need for external pullup resistor on reset line |
| MR Input Logic | Active-low with 50kΩ internal pullup; enables momentary switch interface without external components |
| Supply Current | 25µA max (–40°C to +125°C, VCC = +3.6V); enables long battery life in portable equipment |
Pinout & Package
Package: 5-pin SOT23-5 (U5-1 outline, 21-0057 land pattern), RoHS-compliant, surface-mountable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low during VCC brownout, MR activation, or watchdog timeout |
| 2 | GND | Ground reference for all internal circuits and reset timing accuracy |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (50kΩ); debounced by internal logic |
| 4 | WDI | Watchdog input; toggling within 1.6s prevents reset; left unconnected disables watchdog |
| 5 | VCC | Supply voltage and monitored rail; reset threshold referenced to this pin |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = +1.0V | Ensures correct reset state even during deep brownout or battery sag below 1.2V |
| No external components required | Integrates pullup, debounce, timing capacitors, and voltage reference - reduces BOM count and PCB area |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV VCC glitches without false reset - improves noise robustness in noisy environments |
| 1.6s watchdog timeout with edge-triggered clear | Resets timer on any WDI rising/falling edge - enables flexible software supervision without strict pulse timing |
| Five operating voltage ranges supported | Configurable for 1.8V, 2.5V, 3.0V, 3.3V, or 5.0V systems via Z-suffix (2.32V) threshold selection |
Applications
| Set-Top Boxes | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Power sequencing and brownout recovery during AC dropout or standby mode transitions. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low RESET to hold µP in reset until stable 3.3V rail is restored. Use Value: Prevents corrupted firmware execution during unstable power; 140ms timeout ensures full regulator settling before release. |
Use Scenario: Maintaining system integrity during lithium battery voltage decay from 4.2V to 2.8V. IC Role / Device Role / Timing Role: Voltage monitor detecting drop below 2.32V threshold and triggering controlled shutdown/reset. Use Value: Enables graceful power-down before brownout-induced data loss; operates reliably down to VCC = +1.0V. |
| Embedded Controllers | Intelligent Instruments |
Use Scenario: Ensuring deterministic boot sequence in industrial PLC modules exposed to EMI and supply ripple. IC Role / Device Role / Timing Role: Providing glitch-immune reset generation and watchdog supervision of real-time control firmware. Use Value: Eliminates need for discrete RC reset circuits; 1.6s watchdog catches infinite loops without software overhead. |
Use Scenario: Reliable startup and runtime supervision of handheld multimeters and data loggers. IC Role / Device Role / Timing Role: Active-low RESET output directly interfaces with µP reset pin; MR supports front-panel reset button. Use Value: Reduces component count and board space; internal MR pullup removes external resistor requirement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6822ZUK+T | Open-drain RESET output (vs. push-pull); requires external pullup resistor | Suitable for bidirectional µP reset pins (e.g., Motorola 68HC11) or wired-OR reset buses | Select when interfacing with µPs requiring open-drain reset or shared reset lines |
| MAX6315US23D3+T | Single-function supervisor (no watchdog or MR); 2.33V threshold; 200ms timeout; SOT23-5 | Lacks watchdog and manual reset - used where only voltage monitoring is required | Select when design does not require software fault detection or user-initiated reset |
Compared with MAX6823ZUK+T, MAX6822ZUK+T offers open-drain flexibility but adds BOM cost and layout complexity; MAX6315US23D3+T reduces feature set and cost but sacrifices runtime supervision capability - making MAX6823ZUK+T optimal for compact, self-monitoring embedded systems.
Availability
MAX6823ZUK+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 MAX6823ZUK+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 power, sensing, and connectivity applications - emphasizing reliability, integration, and performance in harsh environments.
The MAX6821–MAX6825 family targets low-voltage microprocessor supervision in space-constrained, battery-sensitive, and thermally demanding systems - delivering integrated voltage monitoring, watchdog, and manual reset in a 5-pin SOT23 package.
FAQ
What is the exact reset threshold voltage of MAX6823ZUK+T?
The MAX6823ZUK+T has a factory-trimmed reset threshold of 2.32V, with ±1.5% tolerance over the full –40°C to +125°C temperature range. This value is confirmed in the Threshold Suffix Guide and Electrical Characteristics table of the official datasheet, and applies specifically to the Z-suffix variant of the MAX6823 series.
Does MAX6823ZUK+T include a watchdog timer and manual reset input?
Yes, the MAX6823ZUK+T includes both a 1.6s nominal watchdog timer and an active-low manual reset (MR) input with internal 50kΩ pullup. These functions are explicitly documented in the General Description, Selector Guide, and Pin Description sections - distinguishing it from MAX6824/MAX6825 variants that omit one or both features.
What is the reset output configuration of MAX6823ZUK+T?
The MAX6823ZUK+T features a push-pull active-low RESET output. Unlike the open-drain version (MAX6822), this configuration drives high (≥0.8×VCC) when deasserted and low (≤0.3V at 500µA sink) when asserted - eliminating the need for an external pullup resistor on the reset line.
Can MAX6823ZUK+T operate reliably at VCC = +1.0V?
Yes, the MAX6823ZUK+T guarantees correct RESET output state down to VCC = +1.0V, as stated in the General Description and Electrical Characteristics. This ensures deterministic reset behavior during deep brownout conditions - a key differentiator versus supervisors requiring ≥1.2V minimum supply.
What package type and footprint does MAX6823ZUK+T use?
The MAX6823ZUK+T uses a 5-pin SOT23-5 package (outline U5-1, land pattern 21-0057). This is confirmed in the Package Information section and Pin Configurations diagram - matching the mechanical dimensions and solder pad layout of standard SOT23-5 footprints used across industrial and consumer PCB designs.
MAX6823ZUK+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:
- Push-Pull, Totem Pole
- 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
MAX6823ZUK+T FAQ
1.How can I place an order for MAX6823ZUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6823ZUK+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 MAX6823ZUK+T reliable?
The price and inventory of MAX6823ZUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6823ZUK+T is usually 5 days.
3.What payment methods are accepted for MAX6823ZUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6823ZUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6823ZUK+T?
MAX6823ZUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6823ZUK+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 MAX6823ZUK+T?
For technical support, including MAX6823ZUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6823ZUK+T requirements.
6.How does Aetrix verify that MAX6823ZUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6823ZUK+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 MAX6823ZUK+T meets industry standards.
7.What is the process for return or replacement of MAX6823ZUK+T?
All MAX6823ZUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6823ZUK+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 MAX6823ZUK+T part is unused and in its original packaging.
Return procedure for MAX6823ZUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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