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Analog Devices Inc./Maxim Integrated MAX6823SUK+T
- Part No.:
- MAX6823SUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6823SUK+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:7,028
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Product details
Overview
MAX6823SUK+T from Maxim Integrated is a low-voltage microprocessor supervisory circuit in SOT23-5 package, featuring push-pull active-low RESET output, 2.93V reset threshold (suffix S), 140ms minimum reset timeout, 1.6s watchdog timeout, and manual reset input. It monitors +2.93V supplies in embedded controllers and portable equipment to prevent code-execution errors during power-up, brownout, or software hang conditions.
For engineers reviewing the MAX6823SUK+T datasheet, MAX6823SUK+T pinout, MAX6823SUK+T application, or MAX6823SUK+T equivalent, key selection criteria include guaranteed reset validity down to VCC = +1.0V, immunity to short negative VCC transients, no external components required, and compatibility with CMOS-level MR/WDI interfaces in space-constrained designs.
Technical Context
The MAX6823SUK+T integrates voltage monitoring, watchdog timer, and debounced manual reset in a single BiCMOS IC. Its reset generator asserts active-low RESET when VCC falls below 2.93V (±30mV over temperature), holding it for ≥140ms after VCC recovers. The watchdog timer triggers reset if WDI remains static beyond 1.6s (min 1.12s, max 2.4s over temperature).
MR input features internal 50kΩ pullup and accepts CMOS-compatible logic levels; WDI detects edges as short as 50ns and clears the watchdog on any transition. Reset outputs remain valid down to VCC = +1.0V, enabling reliable operation during deep brownout conditions typical in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±30mV (VCC falling); ensures precise brownout detection for +2.93V supply rails |
| Reset Timeout Period | 140ms min (100–320ms over -40°C to +125°C); guarantees µP initialization completes before release |
| Watchdog Timeout | 1.6s nominal (1.12–2.4s over temperature); provides robust software execution monitoring | Supply Current | 7–25µA (-40°C to +125°C, VCC = +3.6V); enables ultra-low-power operation in portable equipment |
| Operating Voltage Range | +1.2V to +5.5V (-40°C to +125°C); supports wide input range including deep brownout recovery |
| RESET Output Type | Push-pull active-low; drives directly into µP reset pin without external pullup resistor |
| MR Input Logic | Active-low with 50kΩ internal pullup; eliminates need for external biasing in manual reset implementation |
Pinout & Package
MAX6823SUK+T is housed in a 5-pin SOT23-5 package (U5-1 outline, land pattern 91-0174), measuring 2.9mm × 1.6mm × 1.1mm, suitable for high-density PCB layouts.
| 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; resets µP on logic low pulse ≥1µs |
| 4 | WDI | Watchdog input; edge-sensitive (rising/falling); clears 1.6s timer on transition; disabled if left floating |
| 5 | VCC | Supply voltage and monitored rail; reset threshold referenced to this pin; valid down to +1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = +1.0V | Enables reliable system recovery even during severe brownout where other supervisors fail |
| No external components required | Reduces BOM count and board area; eliminates calibration resistors or capacitors for timing |
| 1.6s watchdog timeout with 50ns edge sensitivity | Supports fine-grained software health monitoring without requiring precise µP timing coordination |
| Immunity to short negative VCC transients | Prevents spurious resets from noise or switching glitches; allows stable operation in electrically noisy environments |
| Debounced manual reset with internal 50kΩ pullup | Permits direct connection of momentary switch to GND; eliminates external RC debounce network |
Applications
| Set-Top Boxes | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Power sequencing and software crash recovery in digital video receivers subject to unstable AC line conditions and thermal stress. IC Role / Device Role / Timing Role: Microprocessor supervisory circuit providing voltage monitoring, watchdog supervision, and manual reset initiation. Use Value: Prevents frozen UI or corrupted channel data by forcing controlled reboot when VCC dips below 2.93V or software hangs for >1.6s. | Use Scenario: Long-life battery-operated handheld instruments requiring low quiescent current and brownout resilience. IC Role / Device Role / Timing Role: Low-voltage supervisor ensuring µP remains held in reset until stable +2.93V rail is established during cold start. Use Value: Enables reliable startup from weak batteries (down to VCC = +1.0V) while consuming only 7µA typical supply current. |
| Embedded Controllers | Intelligent Instruments |
Use Scenario: Industrial control modules deployed in unregulated power environments with frequent voltage sags. IC Role / Device Role / Timing Role: System-level reset manager asserting active-low RESET to ARM Cortex-M or PIC µP during brownout events. Use Value: Guarantees deterministic reset assertion within 20µs of VCC crossing 2.93V threshold, preventing metastability in digital logic. | Use Scenario: Precision test equipment requiring fault-free boot sequence and runtime watchdog protection against firmware lockup. IC Role / Device Role / Timing Role: Dual-function supervisor delivering both power-on reset and software execution monitoring via WDI interface. Use Value: Combines 140ms reset hold time and 1.6s watchdog timeout to cover both power integrity and software reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6822SUK+T | Open-drain active-low RESET output; identical threshold, timeout, and WDI/MR specs | Requires external pullup resistor; suited for bidirectional µP reset pins (e.g., Motorola 68HC11) | Select when interfacing with µPs needing open-drain reset arbitration or level translation |
| TPS3808G33DBVR | 3.3V fixed threshold; 200ms reset timeout; no manual reset input; same SOT23-5 package | Lacks MR and WDI functions; intended for simpler voltage-monitor-only use cases | Choose when only power-supply monitoring is needed and manual reset/watchdog are unnecessary |
Compared with MAX6823SUK+T, MAX6822SUK+T offers open-drain flexibility at the cost of added external component count, while TPS3808G33DBVR reduces feature set but simplifies design for basic reset-only applications-neither is pin-compatible nor drop-in replaceable due to differing RESET output architecture and missing MR/WDI pins.
Availability
MAX6823SUK+T is available at Aetrix Electronics and suitable for embedded controllers, portable/battery-powered equipment, intelligent instruments, and set-top boxes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6823SUK+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 is a semiconductor company specializing in analog and mixed-signal ICs for power management, sensing, and interface applications.
The MAX682x series is designed specifically for microprocessor supervision in space-constrained, low-power systems-delivering integrated voltage monitoring, watchdog, and manual reset in minimal SOT23-5 footprint.
FAQ
What is the exact reset threshold voltage for MAX6823SUK+T?
The MAX6823SUK+T has a factory-programmed reset threshold of 2.93V, with tolerance of ±30mV over the full operating temperature range (-40°C to +125°C). This value is specified in the Electrical Characteristics table under "VTH" for suffix "S", and applies to VCC falling conditions. The device holds RESET asserted until VCC rises above this threshold and remains above it for the full reset timeout period.
Does MAX6823SUK+T support manual reset functionality?
Yes, MAX6823SUK+T includes an active-low manual reset input (MR) with internal 50kΩ pullup to VCC. Driving MR low for ≥1µs forces a reset that persists for the full 140ms timeout period after MR returns high. This feature enables operator-initiated reboots, test-mode entry, or external logic-triggered recovery without additional components.
What is the watchdog timeout behavior of MAX6823SUK+T?
The MAX6823SUK+T watchdog timer has a nominal timeout of 1.6s, with guaranteed range of 1.12s to 2.4s across -40°C to +125°C. It clears on any rising or falling edge at WDI and triggers reset if WDI remains static beyond timeout. While reset is asserted, the watchdog timer remains cleared and does not count-ensuring deterministic response during recovery sequences.
Can MAX6823SUK+T operate reliably at very low supply voltages?
Yes, MAX6823SUK+T guarantees correct reset output state down to VCC = +1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections. This allows the device to maintain supervision integrity during deep brownout conditions where many competing supervisors cease functioning, making it especially valuable in battery-backed or energy-harvesting systems.
What package type and footprint does MAX6823SUK+T use?
MAX6823SUK+T uses a 5-pin SOT23-5 package (outline U5-1, land pattern 91-0174), measuring 2.9mm × 1.6mm × 1.1mm. This RoHS-compliant, lead(Pb)-free package is compatible with standard SMT assembly processes and supports high-density PCB layouts typical in portable and embedded applications.
MAX6823SUK+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:
- 2.93V
- 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
MAX6823SUK+T FAQ
1.How can I place an order for MAX6823SUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6823SUK+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 MAX6823SUK+T reliable?
The price and inventory of MAX6823SUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6823SUK+T is usually 5 days.
3.What payment methods are accepted for MAX6823SUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6823SUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6823SUK+T?
MAX6823SUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6823SUK+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 MAX6823SUK+T?
For technical support, including MAX6823SUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6823SUK+T requirements.
6.How does Aetrix verify that MAX6823SUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6823SUK+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 MAX6823SUK+T meets industry standards.
7.What is the process for return or replacement of MAX6823SUK+T?
All MAX6823SUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6823SUK+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 MAX6823SUK+T part is unused and in its original packaging.
Return procedure for MAX6823SUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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