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Analog Devices Inc./Maxim Integrated MAX6823MUK+T
- Part No.:
- MAX6823MUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6823MUK+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,354
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Product details
Overview
MAX6823MUK+T from Maxim Integrated is a low-voltage microprocessor supervisory IC in 5-pin SOT23 package, featuring push-pull active-low RESET output, 4.38V reset threshold (M suffix), 140ms minimum reset timeout, 1.6s watchdog timer, and debounced manual reset input. It monitors VCC supply integrity for critical µP systems during power-up, brownout, and software fault conditions in portable and embedded controllers.
For engineers reviewing the MAX6823MUK+T datasheet, MAX6823MUK+T pinout, MAX6823MUK+T application, or MAX6823MUK+T equivalent, this device serves as a precision voltage monitor with integrated watchdog and manual reset-key for reliable boot sequencing and runtime fault recovery in battery-powered instrumentation and set-top boxes.
Technical Context
The MAX6823MUK+T implements a dual-function supervisory architecture: a precision bandgap-based voltage detector with ±1.5% threshold accuracy over –40°C to +125°C, and an independent RC-based watchdog timer with 1.6s nominal timeout. Its internal 50kΩ MR pullup enables direct switch-to-ground connection without external components.
RESET assertion occurs on VCC falling below 4.38V, MR low, or WDI timeout; the push-pull output drives low with VOL ≤ 0.3V at ISINK = 50µA and remains asserted for ≥140ms after VCC recovers. Guaranteed reset validity down to VCC = +1.0V ensures operation during deep brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V ±1.5% - precisely matches +5V rail monitoring with margin for ripple and drift |
| Reset Timeout Period | 140ms (min) - provides sufficient hold time for µP power stabilization and clock lock |
| Watchdog Timeout | 1.6s (nominal) - balances fault detection speed against false triggers in interrupt-driven firmware |
| Supply Voltage Range | +1.2V to +5.5V - supports operation across 1.8V, 2.5V, 3.3V, and 5V logic domains |
| Reset Output Type | Push-pull active-low - eliminates need for external pullup; drives directly into µP reset pin |
| MR Input Logic | Active-low with 50kΩ internal pullup - enables momentary switch interface without external R |
| Operating Temperature | –40°C to +125°C - qualified for industrial and automotive-adjacent embedded environments |
Pinout & Package
MAX6823MUK+T uses a 5-pin SOT23-5 package (U5-1 outline, land pattern 91-0174), footprint-compatible with industry-standard 5-lead SOT-23 layouts and reflow-process ready.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low on VCC drop, MR low, or WDI timeout |
| 2 | GND | Ground reference for all internal circuitry and reset timing accuracy |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (50kΩ); no external components needed |
| 4 | WDI | Watchdog input; toggling within 1.6s clears internal timer; left floating disables watchdog |
| 5 | VCC | Supply input and monitored voltage source; reset threshold referenced to this pin |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrates voltage reference, timer, pullup resistor, and output driver - reduces BOM count and layout area |
| Guaranteed reset validity to VCC = +1.0V | Ensures deterministic reset behavior even during severe brownout or battery sag conditions |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV VCC glitches without spurious reset - improves system robustness in noisy power rails |
| Debounced manual reset input | Internal filtering eliminates need for RC network or firmware debounce - simplifies hardware and SW design |
| 1.6s watchdog timeout with 50ns pulse detection | Enables precise software execution monitoring while tolerating brief I/O delays or interrupt latency |
Applications
| Set-Top Boxes | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Power sequencing and firmware crash recovery in digital video receivers with multi-rail supplies. IC Role / Device Role / Timing Role: Supervises +3.3V and +5V rails; asserts reset on undervoltage or watchdog timeout to force safe reboot. Use Value: Prevents frozen UI or corrupted channel tuning by ensuring µP restarts cleanly after brownout or hang. |
Use Scenario: Long-life operation in handheld test instruments powered by Li-ion batteries. IC Role / Device Role / Timing Role: Monitors declining battery voltage; triggers reset before µP enters undefined state due to insufficient VCC. Use Value: Extends usable battery window by enabling controlled shutdown instead of random lockup at ~4.38V. |
| Embedded Controllers | Intelligent Instruments |
Use Scenario: Industrial PLC modules requiring deterministic boot and runtime supervision. IC Role / Device Role / Timing Role: Provides both power-on reset and software watchdog; MR supports field service reset via front-panel button. Use Value: Eliminates need for separate reset IC and discrete watchdog circuit - reduces cost and board space. |
Use Scenario: Precision data loggers with real-time clock and sensor interfaces. IC Role / Device Role / Timing Role: Ensures µP initializes correctly after cold start or transient-induced reset; WDI verifies main loop execution. Use Value: Maintains data integrity by preventing partial writes or missed sensor reads during firmware faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6822MUK+T | Open-drain RESET output instead of push-pull; identical threshold, timeout, and MR/WDI functions | Required when interfacing with µPs having bidirectional reset pins (e.g., legacy 68HC11) needing external pullup | Select MAX6822MUK+T only if open-drain drive and external pullup are part of the target µP interface spec. |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms reset timeout, no manual reset input, same SOT23-5 package | Lacks MR and WDI - suitable only for basic power-monitoring applications without user-initiated or software-monitored reset | Choose TPS3808G33DBVR only when manual reset and watchdog features are unnecessary and 3.3V threshold suffices. |
Compared with MAX6823MUK+T, MAX6822MUK+T offers identical supervision functionality but requires an external pullup for reset assertion, while TPS3808G33DBVR omits MR and WDI entirely-making MAX6823MUK+T the only option supporting full-feature µP supervision with 4.38V threshold in SOT23-5.
Availability
MAX6823MUK+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 MAX6823MUK+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 designs high-performance analog and mixed-signal semiconductor solutions for industrial, computing, communications, and consumer markets.
The MAX6821–MAX6825 family delivers compact, low-power µP supervision with integrated watchdog and manual reset-targeted specifically at space-constrained, battery-sensitive, and reliability-critical embedded systems.
FAQ
What is the reset threshold voltage of MAX6823MUK+T?
The MAX6823MUK+T has a factory-programmed reset threshold of 4.38V ±1.5%, corresponding to the "M" suffix in its part number. This value is guaranteed over the full operating temperature range (–40°C to +125°C) and ensures reliable detection of +5V rail brownout conditions. The threshold hysteresis is 2 × VTH mV, preventing chatter near the trip point.
Does MAX6823MUK+T include a watchdog timer?
Yes, MAX6823MUK+T includes a 1.6s nominal watchdog timer that monitors the WDI pin for activity. If WDI remains static (high or low) beyond this period, the device asserts RESET for the full reset timeout duration (≥140ms). The timer clears on any WDI edge, MR low, or VCC reset event - enabling flexible firmware integration.
What type of reset output does MAX6823MUK+T provide?
MAX6823MUK+T provides a push-pull active-low RESET output. Unlike open-drain variants, it actively drives low during reset and high when inactive - eliminating the need for an external pullup resistor. This simplifies PCB layout and ensures fast, rail-to-rail reset signaling compatible with most modern µP reset inputs.
Can MAX6823MUK+T operate with supply voltages below 1.8V?
Yes, MAX6823MUK+T operates with VCC as low as +1.2V over temperature (–40°C to +125°C) and down to +1.0V for guaranteed reset assertion. Its internal circuitry remains functional and RESET output valid even during deep brownout, making it suitable for ultra-low-power and battery-depleted scenarios where other supervisors fail.
Is manual reset supported on MAX6823MUK+T?
Yes, MAX6823MUK+T includes a dedicated active-low manual reset input (MR) with an internal 50kΩ pullup to VCC. Pulling MR low forces immediate RESET assertion, which persists for ≥140ms after MR returns high. No external components are required - a simple momentary switch from MR to GND provides field-service reset capability.
MAX6823MUK+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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- 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
MAX6823MUK+T FAQ
1.How can I place an order for MAX6823MUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6823MUK+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 MAX6823MUK+T reliable?
The price and inventory of MAX6823MUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6823MUK+T is usually 5 days.
3.What payment methods are accepted for MAX6823MUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6823MUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6823MUK+T?
MAX6823MUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6823MUK+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 MAX6823MUK+T?
For technical support, including MAX6823MUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6823MUK+T requirements.
6.How does Aetrix verify that MAX6823MUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6823MUK+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 MAX6823MUK+T meets industry standards.
7.What is the process for return or replacement of MAX6823MUK+T?
All MAX6823MUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6823MUK+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 MAX6823MUK+T part is unused and in its original packaging.
Return procedure for MAX6823MUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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