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Analog Devices Inc./Maxim Integrated MAX6824RUK+T
- Part No.:
- MAX6824RUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6824RUK+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
MAX6824RUK+T from Maxim Integrated is a low-voltage microprocessor supervisory IC in 5-pin SOT23 package, combining voltage monitoring (reset threshold = 2.63V), watchdog timer (1.6s timeout), and dual push-pull reset outputs (active-low RESET and active-high RESET). It operates from VCC = +2.7V to +3.6V over –40°C to +125°C and guarantees valid reset assertion down to VCC = +1.0V, used for reliable power-up/brownout protection in embedded controllers and intelligent instruments.
For engineers reviewing the MAX6824RUK+T datasheet, MAX6824RUK+T pinout, MAX6824RUK+T application, or MAX6824RUK+T equivalent, this page delivers verified functional identity, exact pin roles, confirmed reset timing (140ms min timeout), watchdog behavior under VCC transients, and validated alternative options for critical µP monitoring in portable and industrial systems.
Technical Context
The MAX6824RUK+T implements a dual-output reset architecture with independent active-low and active-high push-pull drivers, both asserted simultaneously during VCC drop below 2.63V, MR activation, or watchdog timeout. Its internal watchdog timer clears on any WDI edge and remains disabled if WDI is left unconnected or three-stated.
Reset assertion is guaranteed valid down to VCC = +1.0V, and the device tolerates negative VCC transients ≤20µs when overdrive is ≤100mV below threshold. No external components are required, and internal 50kΩ MR pullup eliminates need for external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±30mV at –40°C to +125°C; triggers reset on VCC brownout or power-down |
| Reset Timeout Period | 140ms minimum; holds µP in reset long enough for stable power rail recovery |
| Watchdog Timeout | 1.6s nominal; detects software hang by requiring WDI toggle within interval |
| VCC Operating Range | +2.7V to +3.6V; matches 3.3V system rails with margin for ripple and droop |
| Reset Output Type | Dual push-pull: RESET (active-low) and RESET (active-high); no external pullup needed |
| Guaranteed Reset Validity | Down to VCC = +1.0V; ensures reset integrity during deep undervoltage conditions |
| MR Input Logic | Active-low with 50kΩ internal pullup; supports direct switch-to-GND or CMOS drive |
| WDI Pulse Width Support | 50ns minimum; enables robust interface with fast µP GPIO toggling |
Pinout & Package
Package: 5-pin SOT23-5, surface-mount, RoHS-compliant (indicated by "+T" suffix), footprint compatible with land pattern 21-0057.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output asserted low during fault; drives µP reset pin directly without pullup |
| 2 | GND | Ground reference for all internal circuits and reset timing accuracy |
| 3 | WDI | Watchdog input; edge-sensitive; disables watchdog if left unconnected or three-stated |
| 4 | RESET (active-high) | Push-pull output asserted high during fault; interfaces with logic requiring active-high reset enable |
| 5 | VCC | Supply and monitored rail; powers device and sets reset threshold via internal bandgap reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull reset outputs | Eliminates need for external level-shifting or pull resistors in mixed-logic systems |
| 1.6s watchdog timeout | Matches typical firmware execution cycles in embedded controllers without false triggering |
| 140ms minimum reset timeout | Ensures µP clocks and peripherals stabilize before release from reset |
| Valid reset down to VCC = +1.0V | Maintains fail-safe behavior during severe brownout or battery sag conditions |
| No external components required | Reduces BOM count and PCB area in space-constrained portable equipment |
| Immunity to ≤20µs VCC glitches | Prevents spurious resets from switching noise or ESD-induced supply transients |
Applications
| Set-Top Boxes | Embedded Controllers |
|---|---|
Use Scenario: Power sequencing and brownout recovery in digital media receivers with multi-rail supplies. IC Role / Device Role / Timing Role: Supervisory IC asserting simultaneous active-low and active-high reset signals to SoC and peripheral ICs during VCC dip. Use Value: Prevents corrupted firmware execution and HDMI handshake failures during AC line sags. | Use Scenario: Reliable boot initialization in industrial PLC modules operating in wide temperature ranges. IC Role / Device Role / Timing Role: Dual-reset supervisor ensuring deterministic µP startup after cold power-on or watchdog-triggered recovery. Use Value: Guarantees reset validity down to VCC = +1.0V, enabling operation with aging or low-charge backup batteries. |
| Intelligent Instruments | Portable/Battery-Powered Equipment |
Use Scenario: Fault-tolerant power management in handheld test meters with LCD and ADC subsystems. IC Role / Device Role / Timing Role: Voltage monitor and watchdog enforcing safe shutdown and restart on supply instability or firmware lockup. Use Value: 140ms reset timeout aligns with analog front-end settling time, avoiding measurement corruption. | Use Scenario: Low-power reset control in medical glucose monitors using coin-cell batteries. IC Role / Device Role / Timing Role: Supervisor maintaining reset assertion during battery voltage decay below 2.63V while consuming only 7µA typical ICC. Use Value: Enables >5-year shelf life by eliminating external bias networks and minimizing quiescent current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6823RUK+T | Same 2.63V threshold, SOT23-5, but offers only active-low RESET and manual reset input (no WDI) | Lacks watchdog functionality; suitable where software monitoring is handled externally or unnecessary | Select when watchdog capability is not required and cost reduction is prioritized |
| TPS3808G33DBVR | 2.93V threshold, 200ms reset timeout, open-drain RESET, no active-high output, no manual reset input | Requires external pullup; incompatible with systems needing active-high reset or MR button support | Choose only if board layout accommodates open-drain drive and watchdog/active-high reset are unused |
Compared with MAX6824RUK+T, MAX6823RUK+T omits watchdog and active-high reset-reducing feature set but simplifying integration where those functions are redundant; TPS3808G33DBVR provides higher threshold and longer timeout but lacks dual outputs and MR, limiting use in complex reset architectures.
Availability
MAX6824RUK+T is available at Aetrix Electronics and suitable for embedded controllers, intelligent instruments, and portable/battery-powered equipment requiring stable component supply, extended temperature operation (–40°C to +125°C), and RoHS-compliant packaging.
Supply support for MAX6824RUK+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 consumer applications.
The MAX6821–MAX6825 family delivers compact, low-power µP supervision with integrated watchdog and dual reset outputs, targeting space-constrained and reliability-critical embedded systems.
FAQ
What is the reset threshold voltage of the MAX6824RUK+T?
The MAX6824RUK+T has a factory-trimmed reset threshold of 2.63V, specified with ±30mV tolerance over –40°C to +125°C. This value corresponds to the "R" suffix in the part number and is guaranteed to trigger reset when VCC falls below this level, ensuring compatibility with 3.3V system rails experiencing typical dropout.
Does the MAX6824RUK+T include a manual reset input?
No, the MAX6824RUK+T does not include a manual reset (MR) input. Per the Selector Guide and Pin Description, MAX6824 features WDI and dual RESET outputs but omits MR-unlike MAX6821/MAX6822/MAX6823/MAX6825. Its reset is triggered only by VCC drop below 2.63V or watchdog timeout.
What are the key timing parameters of the MAX6824RUK+T?
The MAX6824RUK+T provides a minimum reset timeout period of 140ms and a nominal watchdog timeout of 1.6s. The VCC-to-reset propagation delay is 20µs, and the device guarantees reset assertion validity down to VCC = +1.0V-critical for brownout resilience in battery-powered designs.
How does the watchdog function work on the MAX6824RUK+T?
The MAX6824RUK+T watchdog requires a rising or falling edge on the WDI pin at least once every 1.6s to prevent reset assertion. If WDI remains static beyond that period, both RESET and RESET outputs activate for 140ms. Leaving WDI unconnected disables the watchdog, as the internal driver services the timer every 1.4s.
Can the MAX6824RUK+T operate with a 1.8V supply?
No, the MAX6824RUK+T is not rated for 1.8V operation. Its specified VCC range is +2.7V to +3.6V, aligned with the "R" threshold variant. For 1.8V systems, consider MAX6824 variants with "W" (1.67V) or "V" (1.58V) suffixes-or alternate families like MAX63xx series designed for lower rails.
MAX6824RUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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
MAX6824RUK+T FAQ
1.How can I place an order for MAX6824RUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6824RUK+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 MAX6824RUK+T reliable?
The price and inventory of MAX6824RUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6824RUK+T is usually 5 days.
3.What payment methods are accepted for MAX6824RUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6824RUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6824RUK+T?
MAX6824RUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6824RUK+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 MAX6824RUK+T?
For technical support, including MAX6824RUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6824RUK+T requirements.
6.How does Aetrix verify that MAX6824RUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6824RUK+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 MAX6824RUK+T meets industry standards.
7.What is the process for return or replacement of MAX6824RUK+T?
All MAX6824RUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6824RUK+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 MAX6824RUK+T part is unused and in its original packaging.
Return procedure for MAX6824RUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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