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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:1,381
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Product details
Overview
MAX6823SUK-T from Maxim Integrated is a low-voltage microprocessor supervisory IC in 5-pin SOT23 package, providing push-pull active-low RESET output, manual reset input (MR), and 1.6s watchdog timer. It monitors +3.08V supply with ±3% threshold accuracy over –40°C to +125°C, asserts reset during power-up/brownout, and guarantees valid reset down to VCC = +1.0V. Used in embedded controllers and portable equipment for reliable µP startup and fault recovery.
For engineers reviewing the MAX6823SUK-T datasheet, MAX6823SUK-T pinout, MAX6823SUK-T application, or MAX6823SUK-T equivalent, this page delivers verified electrical specs, exact pin functions, real-world use cases in battery-powered instruments and set-top boxes, and two validated alternative parts with documented functional and interface differences.
Technical Context
The MAX6823SUK-T integrates voltage monitoring, watchdog timeout supervision, and debounced manual reset into a single BiCMOS IC. Its reset generator triggers on VCC falling below 3.08V (±3% at –40°C to +125°C), holds RESET low for ≥140ms after VCC recovers, and supports MR assertion with internal 50kΩ pullup and 200ns MR-to-reset delay.
Watchdog operation relies on WDI edge detection: any high/low transition within 1.6s (min 1.12s, max 2.4s over temperature) clears the timer; failure to toggle triggers reset. The push-pull active-low RESET output drives up to 3.2mA sink at VCC ≥ 4.25V with VOL ≤ 0.4V, and remains valid down to VCC = +1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±3% (–40°C to +125°C); ensures reliable brownout detection for +3.3V systems |
| Reset Timeout Period | 140ms minimum; guarantees µP remains held in reset long enough for stable power rail recovery |
| Watchdog Timeout | 1.6s nominal (1.12s–2.4s over temp); provides robust software execution monitoring without false triggers |
| VCC Supply Current | 25µA max at –40°C to +125°C, VCC = +3.6V; enables ultra-low-power operation in battery-powered devices |
| RESET Output Type | Push-pull active-low; eliminates external pullup resistor and supports direct connection to µP reset pins |
| Operating Voltage Range | +1.2V to +5.5V (–40°C to +125°C); allows operation during deep brownout while maintaining reset validity |
| MR Input Logic | Active-low with 50kΩ internal pullup; simplifies manual reset implementation using momentary switch to GND |
Pinout & Package
Package: 5-pin SOT23-5 (U5-1 outline, land pattern 21-0057), RoHS-compliant, surface-mountable with 1.3mm × 2.9mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output asserted low during VCC undervoltage, MR assertion, or watchdog timeout; sinks up to 3.2mA |
| 2 | GND | Ground reference for all internal circuitry and reset timing; must be connected to system ground plane |
| 3 | MR (manual reset) | Active-low input with internal 50kΩ pullup to VCC; 200ns delay to RESET assertion; accepts CMOS logic levels |
| 4 | WDI (watchdog input) | Edge-sensitive input; rising or falling edge resets 1.6s watchdog timer; left unconnected to disable watchdog |
| 5 | VCC | Supply and monitored voltage input; powers device and sets reset threshold; valid from +1.2V to +5.5V |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrates voltage monitor, watchdog, and manual reset in one SOT23-5 IC-reduces BOM count and PCB area vs. discrete solutions |
| Guaranteed reset validity to VCC = +1.0V | Ensures deterministic reset behavior even during severe brownout conditions where other supervisors fail |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV-deep VCC glitches without spurious reset-critical for noisy industrial power rails |
| Debounced manual reset input | Internal filtering eliminates need for external RC network; supports direct switch-to-GND connection |
| Watchdog edge detection (50ns pulse width) | Enables reliable software monitoring even with fast µP I/O toggling; avoids missed edges in high-speed code paths |
Applications
| Set-Top Boxes | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Power sequencing and firmware crash recovery in cable/satellite receiver units subject to intermittent AC line drops. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low RESET to ARM-based SoC during brownout and watchdog timeout events. Use Value: Prevents corrupted channel tuning or HDMI handshake failures by ensuring full µP reset before reinitialization. |
Use Scenario: Long-life handheld test instruments powered by Li-ion batteries with gradual voltage decay. IC Role / Device Role / Timing Role: Monitors +3.08V LDO output and triggers reset before µP enters undefined state due to undervoltage. Use Value: Extends usable battery runtime by enabling safe operation down to VCC = +1.0V while guaranteeing clean restart. |
| Embedded Controllers | Intelligent Instruments |
Use Scenario: Industrial PLC I/O modules requiring deterministic boot after power interruption or ESD event. IC Role / Device Role / Timing Role: Provides 140ms minimum reset hold time and manual reset via front-panel button for field service. Use Value: Eliminates need for external reset supervisor IC and discrete debounce circuit-reducing board cost and complexity. |
Use Scenario: Benchtop multimeters and oscilloscopes needing immunity to power rail noise during analog signal acquisition. IC Role / Device Role / Timing Role: Detects sub-100mV VCC transients and suppresses false resets using built-in glitch rejection. Use Value: Maintains measurement continuity during brief line disturbances without requiring user intervention or recalibration. |
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 RESET output instead of push-pull; requires external pullup resistor | Suitable for bidirectional µP reset pins (e.g., Motorola 68HC11) but adds BOM item and layout routing overhead | Select when interfacing with legacy µPs requiring open-drain reset arbitration or shared reset bus |
| TPS3808G33DBVR | Fixed 3.3V threshold (±0.5%), 200ms reset timeout, no manual reset input, lower quiescent current (1.8µA) | Lacks MR and watchdog-only voltage monitoring; optimized for low-power always-on systems without firmware supervision needs | Choose for simple power-good monitoring in energy-harvesting sensors where watchdog and manual reset are unnecessary |
Compared with MAX6823SUK-T, MAX6822SUK-T offers open-drain flexibility at the cost of added external component and reduced drive strength, while TPS3808G33DBVR trades feature richness for ultra-low ICC and tighter threshold tolerance-making it suitable only for basic voltage monitoring without supervision logic.
Availability
MAX6823SUK-T is available at Aetrix Electronics and suitable for embedded controllers, portable/battery-powered equipment, and intelligent instruments requiring stable component supply across automotive-grade temperature range (–40°C to +125°C) and long-term production continuity.
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 (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX682x family targets space-constrained embedded systems needing integrated voltage monitoring, watchdog supervision, and manual reset-all in a 5-pin SOT23 package for minimal footprint and simplified design.
FAQ
What is the exact reset threshold voltage for MAX6823SUK-T and how tightly is it specified?
The MAX6823SUK-T has a factory-trimmed reset threshold of 3.08V, with guaranteed tolerance of ±3% over the full operating temperature range (–40°C to +125°C). This value is confirmed in the Threshold Suffix Guide and Electrical Characteristics table, where VTH min/max values are listed as 2.97V/3.17V at –40°C to +125°C. The 3.08V threshold is specifically selected for compatibility with +3.3V supply rails in embedded controllers and portable equipment.
Does MAX6823SUK-T include a watchdog timer, and what is its timeout behavior?
Yes, the MAX6823SUK-T includes a watchdog timer with a nominal timeout period of 1.6 seconds. The actual timeout varies from 1.12s to 2.4s over temperature (–40°C to +125°C), as specified in the Electrical Characteristics table. The timer resets on any rising or falling edge at the WDI pin; if no edge occurs within the timeout window, the device asserts the active-low RESET output for the full reset timeout period (≥140ms).
How does the manual reset (MR) input function on MAX6823SUK-T, and what external components are needed?
The MR input on MAX6823SUK-T is active-low with an internal 50kΩ pullup resistor to VCC, so no external pullup is required. Driving MR low asserts RESET immediately, and RESET remains active for ≥140ms after MR returns high. A normally open momentary switch between MR and GND provides full manual reset functionality; no external debounce circuitry is needed due to internal filtering.
Can MAX6823SUK-T operate reliably at very low supply voltages, and down to what VCC level is reset guaranteed?
Yes, MAX6823SUK-T guarantees correct RESET output state down to VCC = +1.0V, as explicitly stated in the General Description and Electrical Characteristics. This ensures deterministic reset behavior during deep brownout conditions where many competing supervisors lose functionality. Operation is fully specified from VCC = +1.2V to +5.5V across –40°C to +125°C.
What package type and footprint does MAX6823SUK-T use, and are there lead-free options?
MAX6823SUK-T uses the 5-pin SOT23-5 package (outline U5-1, land pattern 21-0057), measuring 1.3mm × 2.9mm. It is available in both leaded and lead(Pb)-free versions; the "-T" suffix denotes leaded packaging, while "+T" indicates lead-free. The package is RoHS-compliant and designed for standard reflow soldering processes.
MAX6823SUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- 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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