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Analog Devices Inc./Maxim Integrated MAX6824SUK+T
- Part No.:
- MAX6824SUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6824SUK+T.pdf
- Description:
- IC MPU SUPERVISOR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,089
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Product details
Overview
MAX6824SUK+T from Maxim Integrated is a low-voltage microprocessor supervisory IC in SOT23-5 package, combining voltage monitoring (3.08V threshold), 1.6s watchdog timer, and dual push-pull reset outputs (active-low RESET and active-high RESET). It ensures reliable µP reset during power-up, brownout, and software fault conditions in battery-powered and embedded systems.
For engineers reviewing the MAX6824SUK+T datasheet, MAX6824SUK+T pinout, MAX6824SUK+T application, or MAX6824SUK+T equivalent, this device supports critical reset sequencing, watchdog supervision, and dual-reset signaling without external components - key for portable instrumentation, set-top boxes, and industrial controllers requiring guaranteed reset validity down to VCC = +1.0V.
Technical Context
The MAX6824SUK+T implements a precision bandgap-based voltage monitor with ±1.5% threshold accuracy over –40°C to +125°C and 60ppm/°C temperature coefficient. Its internal 1.6s watchdog timer clears on any WDI edge and triggers reset if no transition occurs within timeout.
It features two independent push-pull reset outputs: RESET asserts low when VCC drops below 3.08V, MR is pulled low, or watchdog times out; RESET asserts high under identical conditions. Both outputs remain active for ≥140ms after recovery, with guaranteed logic state integrity down to VCC = +1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±1.5% - precisely monitors +3.3V supply rails with brownout detection at defined margin |
| Reset Timeout Period | 140ms (min) - ensures µP completes full initialization before release from reset |
| Watchdog Timeout | 1.6s (nominal) - detects firmware hangs exceeding typical task cycle time in embedded controllers |
| Supply Voltage Range | +1.2V to +5.5V - supports operation across wide input range including low-power battery modes |
| Reset Output Drive | Push-pull RESET (low) and RESET (high) - eliminates need for external pull resistors in most µP interfaces |
| Guaranteed Reset Validity | VCC ≥ +1.0V - maintains correct reset state during deep brownout or ultra-low-power wake-up sequences |
| Operating Temperature | –40°C to +125°C - qualified for automotive-grade and industrial ambient environments |
Pinout & Package
MAX6824SUK+T uses a 5-pin SOT23-5 package (U5-1 outline, land pattern 91-0174), surface-mount compatible with standard reflow profiles and RoHS-compliant (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output - directly drives µP reset pin without pull-up; asserts low on fault |
| 2 | GND | Ground reference - common return path for all internal circuits and reset outputs |
| 3 | WDI | Watchdog input - toggling within 1.6s prevents reset; unconnected disables watchdog |
| 4 | RESET | Active-high push-pull reset output - complements RESET for systems requiring high-asserted reset signal |
| 5 | VCC | Supply and monitored voltage input - powers device and provides reference for 3.08V threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull reset outputs | Eliminates external pull resistors and enables direct interface to both active-low and active-high µP reset pins |
| 1.6s watchdog timer with edge-triggered clear | Prevents false timeouts from static WDI states; robust against noise-induced glitches on watchdog line |
| No external components required | Reduces BOM count and PCB area - full supervision functionality in single 5-pin SOT23 |
| Reset valid down to VCC = +1.0V | Ensures deterministic reset behavior during ultra-low-voltage wake-up or battery depletion scenarios |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV VCC glitches without spurious reset - improves system resilience in noisy power environments |
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 main supply and asserts synchronized RESET/RESET signals to SoC and memory controller during brownout. Use Value: Prevents corrupted channel tuning or HDMI handshake failures by enforcing clean reset before application restart. |
Use Scenario: Long-life operation in handheld test instruments powered by Li-ion batteries with variable discharge profiles. IC Role / Device Role / Timing Role: Monitors declining battery voltage and triggers watchdog reset if firmware stalls during low-power mode transitions. Use Value: Extends usable battery life by avoiding deep discharge while ensuring recoverable fault handling without manual intervention. |
| Embedded Controllers | Intelligent Instruments |
Use Scenario: Real-time control loop supervision in PLC I/O modules exposed to industrial EMI and supply ripple. IC Role / Device Role / Timing Role: Provides glitch-immune reset assertion and 1.6s watchdog coverage for ARM Cortex-M4 firmware execution. Use Value: Maintains deterministic control timing by preventing runaway code without requiring µP-level watchdog ISR overhead. |
Use Scenario: Calibration-critical data acquisition in benchtop multimeters and oscilloscopes with FPGA-based front ends. IC Role / Device Role / Timing Role: Guarantees valid reset state during cold-start and power-cycle events where VCC ramps slowly from 1.0V. Use Value: Preserves factory calibration integrity by blocking µP execution until stable +3.3V rail is confirmed and reset timeout expires. |
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 RESET; same 3.08V threshold and 1.6s watchdog | Requires external pull-up for µP reset; suited for bidirectional reset pins (e.g., MC68HC11) | Select when interfacing to µPs with open-drain-compatible reset inputs or shared reset buses |
| MAX6315US31D3+T | Single active-low push-pull reset; no watchdog or manual reset; 3.08V threshold; 200ms timeout | Lacks supervision features beyond voltage monitoring - simpler, lower-cost option for basic reset-only needs | Select when watchdog and dual-reset functionality are unnecessary and board space allows larger SOT23-3 package |
Compared with MAX6824SUK+T, MAX6822SUK+T offers open-drain flexibility at the cost of external biasing, while MAX6315US31D3+T reduces feature count and package size but removes critical watchdog and dual-output capabilities essential for fault-tolerant designs.
Availability
MAX6824SUK+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 MAX6824SUK+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 demanding industrial, automotive, and computing applications.
The MAX6821–MAX6825 family delivers compact, low-power µP supervision with integrated watchdog and dual-reset outputs - engineered specifically for space-constrained, battery-sensitive embedded systems needing high reliability without external components.
FAQ
What is the reset threshold voltage for MAX6824SUK+T?
The MAX6824SUK+T has a factory-trimmed reset threshold of 3.08V ±1.5%, optimized for monitoring +3.3V supply rails. This value is fixed by the 'T' suffix in the part number and is guaranteed over –40°C to +125°C with 60ppm/°C temperature coefficient. The threshold remains stable even as VCC drops to +1.0V, ensuring accurate brownout detection across operating conditions.
Does MAX6824SUK+T include a manual reset input?
No, MAX6824SUK+T does not include a manual reset (MR) input. Unlike MAX6821/MAX6822/MAX6823/MAX6825, the MAX6824 variant omits MR to dedicate Pin 3 exclusively to the watchdog input (WDI). This configuration prioritizes autonomous supervision over operator-initiated reset, making MAX6824SUK+T ideal for sealed or inaccessible systems where physical reset access is impractical.
How does the dual reset output architecture of MAX6824SUK+T work?
MAX6824SUK+T provides two independent push-pull reset outputs: active-low RESET (Pin 1) and active-high RESET (Pin 4). When VCC falls below 3.08V, WDI times out, or during power-up, RESET goes low and RESET goes high simultaneously. Both remain asserted for ≥140ms after VCC recovers. This eliminates external inverters or level shifters needed to drive µPs with differing reset polarity requirements.
What is the watchdog timeout period for MAX6824SUK+T, and how is it cleared?
The MAX6824SUK+T features a nominal 1.6s watchdog timeout period, with min/max values of 0.80s and 2.60s over –40°C to +125°C. The internal timer clears on any rising or falling edge at the WDI pin (Pin 3), or when RESET is asserted. If WDI is left unconnected, the internal driver automatically services the timer every ~1.4s, effectively disabling watchdog supervision without external circuitry.
Can MAX6824SUK+T operate reliably at very low supply voltages?
Yes, MAX6824SUK+T guarantees correct reset output states down to VCC = +1.0V - critical for battery-powered systems nearing end-of-life or operating in ultra-low-power wake-up modes. Its internal circuitry remains functional and deterministic at this level, unlike many supervisors that lose reset validity below +1.8V. This ensures safe, predictable behavior during deep brownout recovery sequences.
MAX6824SUK+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 High/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
MAX6824SUK+T FAQ
1.How can I place an order for MAX6824SUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6824SUK+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 MAX6824SUK+T reliable?
The price and inventory of MAX6824SUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6824SUK+T is usually 5 days.
3.What payment methods are accepted for MAX6824SUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6824SUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6824SUK+T?
MAX6824SUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6824SUK+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 MAX6824SUK+T?
For technical support, including MAX6824SUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6824SUK+T requirements.
6.How does Aetrix verify that MAX6824SUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6824SUK+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 MAX6824SUK+T meets industry standards.
7.What is the process for return or replacement of MAX6824SUK+T?
All MAX6824SUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6824SUK+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 MAX6824SUK+T part is unused and in its original packaging.
Return procedure for MAX6824SUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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