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Analog Devices Inc./Maxim Integrated MAX6829WIUT+T
- Part No.:
- MAX6829WIUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829WIUT+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,190
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Product details
Overview
MAX6829WIUT+T from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring primary VCC (1.62V–1.71V threshold) and secondary VCC2 (1.665V nominal threshold), with manual reset input, 1.6s watchdog timeout, and active-low push-pull RESET output. It ensures reliable power-on reset and brownout protection in battery-powered embedded systems.
For engineers reviewing the MAX6829WIUT+T datasheet, MAX6829WIUT+T pinout, MAX6829WIUT+T application, or MAX6829WIUT+T equivalent, key selection criteria include its factory-trimmed dual-supply monitoring capability, guaranteed reset validity down to VCC = +1.0V, immunity to short negative VCC transients, and compatibility with low-voltage µP core/I/O rails requiring precise voltage sequencing.
Technical Context
The MAX6829WIUT+T integrates two independent voltage monitors: one for primary supply VCC (threshold = 1.67V ±0.05V at -40°C to +125°C) and one factory-trimmed monitor for secondary supply VCC2 (threshold = 1.665V ±0.05V). It features a dedicated WDI input with 1.6s watchdog timeout and internal 50kΩ MR pullup.
Its push-pull RESET output asserts low during VCC/VCC2 undervoltage, MR assertion, or watchdog timeout, holding for ≥140ms after recovery. The device operates across -40°C to +125°C with supply current ≤25µA at full temperature range and requires no external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.67V (min 1.61V, max 1.72V @ -40°C to +125°C); sets primary supply brownout detection point for 1.6–1.7V systems |
| VCC2 Reset Threshold | 1.665V (min 1.611V, max 1.719V @ -40°C to +125°C); factory-trimmed secondary supply monitor for low-voltage I/O or core rails |
| Reset Timeout Period | ≥140ms (min), up to 320ms @ -40°C to +125°C); ensures µP remains held in reset long enough for stable power recovery |
| Watchdog Timeout Period | 1.6s (nominal), 0.80s–2.60s @ -40°C to +125°C); provides software execution supervision without external timing components |
| RESET Output Type | Active-low push-pull; drives high-impedance µP reset pin directly without external pullup, compatible with bidirectional reset I/O |
| Operating Voltage Range | VCC = +1.2V to +5.5V @ -40°C to +125°C; guarantees functional reset assertion down to VCC = +1.0V |
| Supply Current (ICC) | ≤25µA @ -40°C to +125°C, VCC = +1.8V; enables multi-year battery life in portable equipment |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant lead-free packaging indicated by "+T" suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives µP reset pin low during fault conditions; returns high after timeout; no external pullup required |
| 2 - GND | Ground reference | Common return path for all internal comparators, timers, and output stage |
| 3 - MR | Manual-reset input (active-low) | Internal 50kΩ pullup to VCC; momentary GND connection forces system reset; noise-immune with optional 0.1µF capacitor |
| 4 - WDI | Watchdog input | Toggles internal 1.6s timer; rising/falling edge clears timeout; unconnected or three-stated disables watchdog |
| 5 - VCC2 | Secondary supply monitor input | Factory-trimmed comparator input for +0.9V to +2.5V supplies; no external resistor divider needed |
| 6 - VCC | Primary supply monitor input and device power | Supplies internal circuitry and monitors main rail; valid operation guaranteed down to +1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises primary VCC (1.67V threshold) and secondary VCC2 (1.665V threshold) without shared reference or calibration |
| Guaranteed reset validity to VCC = +1.0V | Ensures deterministic reset behavior during deep brownout or battery depletion, critical for fail-safe embedded control |
| No external components required | Eliminates BOM cost and board space for resistors, capacitors, or discrete supervisors-full functionality in single IC |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV VCC glitches without spurious reset, improving robustness in electrically noisy environments |
| 140ms minimum reset timeout | Meets JEDEC JESD78 reliability requirements for µP initialization timing, preventing premature release from reset |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Wearable health monitor powered by single Li-ion cell with 1.8V I/O rail and 1.2V core supply. IC Role / Device Role: Dual-supply supervisor asserting reset if either rail drops below specification during battery discharge or load transients. Use Value: Prevents corrupted sensor data logging or firmware execution errors during low-battery brownout, extending usable runtime. |
Use Scenario: Industrial PLC controller with separate 3.3V communication interface and 1.5V FPGA core. IC Role / Device Role: Monitors both supplies independently; holds system in reset until both stabilize post-power-up or recovery. Use Value: Eliminates need for discrete reset generators per rail, reducing PCB area and qualification effort for safety-critical control logic. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Handheld multimeter with segmented LCD, precision ADC, and low-power µC operating from coin-cell battery. IC Role / Device Role: Supervises 1.6V µC core and 2.5V analog front-end; uses watchdog to detect firmware lockup during measurement cycles. Use Value: Ensures instrument always starts from known state after battery insertion or low-power wake-up, guaranteeing measurement accuracy. |
Use Scenario: Medical infusion pump controller where µP failure could cause unsafe dosing. IC Role / Device Role: Provides hardware-enforced reset on VCC/VCC2 undervoltage and software supervision via WDI to detect hung control loops. Use Value: Meets IEC 62304 Class C software safety requirements through redundant fault detection paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6829WJUT+T | VCC threshold = 1.58V (vs. 1.67V); VCC2 threshold = 1.575V (vs. 1.665V); same package and features | Designed for 1.5V–1.6V primary/secondary supply pairs; lower thresholds reduce margin for ripple-induced false resets | Select when system VCC/VCC2 nominal voltages are closer to 1.55V than 1.65V |
| MAX6830WJUT+T | Active-high push-pull RESET output (vs. active-low); identical VCC/VCC2 thresholds and watchdog timing | Required for µPs with active-high reset inputs; incompatible with active-low reset architectures without level-shifting | Choose only when host µP demands active-high reset assertion and no redesign of reset net is feasible |
Compared with MAX6829WIUT+T, the MAX6829WJUT+T offers tighter voltage matching for lower-rail systems but reduced noise margin, while the MAX6830WJUT+T changes reset polarity-neither is pin-compatible nor drop-in; both require schematic and layout verification for signal integrity and timing compliance.
Availability
MAX6829WIUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, intelligent instruments, and critical µP monitoring requiring stable component supply across industrial temperature ranges.
Supply support for MAX6829WIUT+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 demanding industrial, medical, and communications applications.
The MAX6826–MAX6831 family delivers dual-supply µP supervision in ultra-small SOT23 packages, targeting space-constrained, low-power embedded systems requiring guaranteed reset behavior across wide temperature and voltage ranges.
FAQ
What is the exact VCC reset threshold voltage for MAX6829WIUT+T over temperature?
The MAX6829WIUT+T has a VCC reset threshold of 1.67V (typical) with min/max limits of 1.61V to 1.72V across -40°C to +125°C. This threshold is factory-trimmed and specified in the Electrical Characteristics table under "VCC Reset Threshold" for suffix "W". The value applies exclusively to the MAX6829WIUT+T and is not shared with other variants in the MAX6826–MAX6831 family.
Does MAX6829WIUT+T support monitoring a secondary supply below 1.0V?
No. The MAX6829WIUT+T's VCC2 input is factory-trimmed for secondary supply monitoring between +0.9V and +2.5V, with a nominal threshold of 1.665V. It does not support sub-0.9V monitoring; for voltages down to +0.63V, the MAX6826/MAX6827/MAX6828 series with RESET IN pin must be used instead of MAX6829WIUT+T.
Is the RESET output of MAX6829WIUT+T open-drain or push-pull?
The MAX6829WIUT+T features an active-low push-pull RESET output, as confirmed in the Selector Guide and Pin Description tables. This differs from the MAX6828/MAX6831 (open-drain) and MAX6827/MAX6830 (active-high push-pull). The push-pull configuration eliminates the need for an external pullup resistor when interfacing with standard µP reset inputs.
Can MAX6829WIUT+T operate with VCC below 1.2V?
Yes. The MAX6829WIUT+T is guaranteed to assert a valid RESET output down to VCC = +1.0V, as explicitly stated in the General Description and Absolute Maximum Ratings. However, its specified operating voltage range is +1.2V to +5.5V at -40°C to +125°C; operation below +1.2V is limited to reset assertion functionality only and not full parametric compliance.
What is the watchdog timeout period tolerance for MAX6829WIUT+T?
The MAX6829WIUT+T watchdog timeout period is 1.6s nominal, with a guaranteed range of 0.80s to 2.60s across -40°C to +125°C, per the Electrical Characteristics table. This variation accounts for process, voltage, and temperature effects; it is not user-adjustable and applies identically to all MAX6829 variants regardless of threshold suffix.
MAX6829WIUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.388V, 1.67V
- 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-6
MAX6829WIUT+T FAQ
1.How can I place an order for MAX6829WIUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829WIUT+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 MAX6829WIUT+T reliable?
The price and inventory of MAX6829WIUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829WIUT+T is usually 5 days.
3.What payment methods are accepted for MAX6829WIUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829WIUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829WIUT+T?
MAX6829WIUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829WIUT+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 MAX6829WIUT+T?
For technical support, including MAX6829WIUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829WIUT+T requirements.
6.How does Aetrix verify that MAX6829WIUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6829WIUT+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 MAX6829WIUT+T meets industry standards.
7.What is the process for return or replacement of MAX6829WIUT+T?
All MAX6829WIUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829WIUT+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 MAX6829WIUT+T part is unused and in its original packaging.
Return procedure for MAX6829WIUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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