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Analog Devices Inc./Maxim Integrated MAX6829TIUT
- Part No.:
- MAX6829TIUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829TIUT.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:13,753
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Product details
Overview
MAX6829TIUT from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring primary supply (VCC) and factory-trimmed secondary supply (VCC2) down to +0.9V, with manual reset input, 1.6s watchdog timeout, and open-drain active-low RESET output. It guarantees valid reset assertion down to VCC = +1.0V and is used in portable battery-powered systems requiring robust brownout and watchdog protection.
For engineers reviewing the MAX6829TIUT datasheet, MAX6829TIUT pinout, MAX6829TIUT application, or MAX6829TIUT equivalent, this page delivers verified electrical thresholds, timing behavior, reset output configuration, thermal stability data, and real-world interface guidance for multivoltage embedded controllers and automotive subsystems.
Technical Context
The MAX6829TIUT integrates two independent voltage monitors: one for VCC (programmable threshold via suffix; TIUT implies VCC = +3.08V ±1.5%, per Standard Versions Table), and a factory-trimmed VCC2 monitor fixed at +0.9V nominal (±3.5% over -40°C to +125°C). Its internal 1.6s watchdog timer clears on any WDI edge and triggers reset if no transition occurs within timeout.
It features an open-drain RESET output with guaranteed VOL ≤ 0.4V at ISINK = 3.2mA (VCC ≥ 4.25V), 140ms minimum reset timeout (tRP), and immunity to negative VCC transients ≤ 20µs when overdrive is ≤ 100mV. Reset remains asserted during MR low and for full tRP after MR release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | +3.08V (±1.5% over -40°C to +125°C); sets primary supply brownout detection point |
| VCC2 Threshold | +0.9V (factory-trimmed, ±3.5% over -40°C to +125°C); monitors secondary low-voltage rail without external resistors |
| RESET Output Type | Active-low open-drain; enables wired-OR reset bus and bidirectional µP reset I/O interfacing (e.g., Motorola 68HC11) |
| Reset Timeout (tRP) | 140ms minimum; ensures stable power recovery before processor release, preventing premature boot |
| Watchdog Timeout (tWD) | 1.6s nominal (0.80s–2.60s over -40°C to +125°C); detects software hangs in safety-critical firmware loops |
| Supply Current (ICC) | 30µA max at VCC = +3.6V, -40°C to +125°C; enables multi-year operation in coin-cell–powered devices |
| Operating Range | VCC = +1.2V to +5.5V; supports operation through deep brownout while maintaining reset validity down to +1.0V |
Pinout & Package
MAX6829TIUT is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm, lead-free compatible. Pin 1 is marked by a dot or beveled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output; requires external pullup; sinks ≥3.2mA at VOL ≤ 0.4V |
| 2 | GND | Ground reference for all internal comparators and logic; must be low-impedance connection |
| 3 | MR | Manual reset input, active-low with 50kΩ internal pullup to VCC; 1µs minimum pulse width required |
| 4 | WDI | Watchdog input; toggling resets internal 1.6s timer; left unconnected disables watchdog function |
| 5 | VCC2 | Secondary supply input; factory-trimmed comparator input for +0.9V threshold monitoring |
| 6 | VCC | Primary supply input; powers device and feeds VCC threshold comparator (set to +3.08V for TIUT) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | VCC (programmable) + VCC2 (fixed +0.9V) enables simultaneous tracking of core and I/O rails in 1.8V/2.5V/3.3V systems |
| Open-drain RESET with guaranteed sink capability | Sinks 3.2mA at VOL ≤ 0.4V (VCC ≥ 4.25V), supporting direct interface to bidirectional µP reset pins without level shifters |
| Guaranteed reset validity down to VCC = +1.0V | Ensures deterministic reset assertion during deep brownout-critical for nonvolatile memory write integrity and safe shutdown |
| Immunity to short negative VCC transients | Rejects ≤20µs glitches at 100mV overdrive, eliminating false resets in electrically noisy automotive or industrial environments |
| No external components required | Factory-trimmed thresholds and integrated 1.6s watchdog eliminate need for external RC networks or precision references |
Applications
| Portable Power Management | Automotive Body Control Module |
|---|---|
|
Use Scenario: Battery-powered handheld medical device with 3.3V main rail and 1.8V sensor interface rail. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting open-drain RESET to ARM Cortex-M0 during VCC drop below +3.08V or VCC2 drop below +0.9V. Use Value: Prevents corrupted EEPROM writes during partial battery discharge by holding µP in reset until both rails stabilize above thresholds. |
Use Scenario: BCM controlling door locks, lighting, and window motors in 12V vehicle system with local 3.3V/1.8V regulators. IC Role / Device Role / Timing Role: Monitors 3.3V MCU supply and 1.8V CAN transceiver supply; asserts RESET on either brownout or WDI timeout due to firmware lockup. Use Value: Enables fail-safe recovery without requiring ignition cycle restart-critical for ASIL-B–level functional safety compliance. |
| Industrial Sensor Node | Embedded Controller for Smart Metering |
|
Use Scenario: LoRaWAN sensor node powered by energy harvesting with intermittent 2.5V/1.2V dual-rail supply. IC Role / Device Role / Timing Role: Uses VCC2 pin to monitor harvested 1.2V rail; triggers reset if energy storage falls below operational threshold. Use Value: Eliminates need for external resistor divider on low-voltage rail-reducing BOM count and leakage current in ultra-low-power designs. |
Use Scenario: Electricity meter with separate 3.3V metrology ASIC supply and 1.8V communication module supply. IC Role / Device Role / Timing Role: Supervises both supplies and provides 1.6s watchdog supervision of metrology firmware execution. Use Value: Guarantees reset assertion even if VCC drops to +1.0V-ensuring accurate last-read energy capture before power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6830TIUT | Active-high push-pull RESET output (vs. MAX6829TIUT's open-drain); identical VCC/VCC2 thresholds and watchdog timing | Requires no external pullup; incompatible with wired-OR reset buses or bidirectional µP reset I/O | Select MAX6830TIUT only when driving dedicated, single-load reset lines where active-high polarity is preferred |
| TPS3808G33DBVR | Single-supply supervisor (monitors only VCC); 3.3V fixed threshold; no VCC2 input or watchdog input; 200ms reset timeout | Lacks secondary supply monitoring and watchdog functionality-requires additional ICs for dual-rail or safety-critical use cases | Choose TPS3808G33DBVR only for cost-sensitive, single-rail applications where VCC2 and watchdog features are unnecessary |
Compared with MAX6829TIUT, MAX6830TIUT offers identical monitoring accuracy but different reset polarity and drive architecture, while TPS3808G33DBVR reduces integration by omitting VCC2 and watchdog-making it unsuitable for multivoltage or safety-monitored systems.
Availability
MAX6829TIUT is available at Aetrix Electronics and suitable for portable/battery-powered equipment, automotive body control modules, and industrial sensor nodes requiring stable component supply across extended temperature ranges (-40°C to +125°C).
Supply support for MAX6829TIUT 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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications in industrial, automotive, and communications markets.
The MAX6826–MAX6831 family was engineered specifically for dual-rail microprocessor supervision in space-constrained, ultra-low-power systems-emphasizing guaranteed operation down to +1.0V VCC and factory-trimmed sub-1V monitoring without external components.
FAQ
What is the exact VCC reset threshold voltage for MAX6829TIUT?
The MAX6829TIUT has a VCC reset threshold of +3.08V, with tolerance of ±1.5% over the full operating temperature range (-40°C to +125°C). This value is factory-programmed and confirmed in the Standard Versions Table under suffix "T". The threshold is referenced to the VCC pin itself and remains stable across load and temperature per the Electrical Characteristics table.
Does MAX6829TIUT support monitoring a secondary supply below 1.0V?
Yes. MAX6829TIUT includes a dedicated VCC2 pin with a factory-trimmed comparator set to +0.9V nominal (±3.5% over -40°C to +125°C), enabling direct monitoring of low-voltage rails such as 0.9V I/O supplies or energy-harvesting outputs without external resistors or references.
What is the watchdog timeout behavior of MAX6829TIUT?
The MAX6829TIUT features a nominal 1.6s watchdog timeout period, varying from 0.80s to 2.60s across -40°C to +125°C. The internal timer clears on any rising or falling edge at WDI and triggers reset if no transition occurs within timeout. Leaving WDI unconnected disables the watchdog function entirely.
Can MAX6829TIUT's RESET output interface directly with a bidirectional µP reset pin?
Yes. The MAX6829TIUT's open-drain RESET output is explicitly designed for this purpose. As documented in the Applications Information section, it interfaces cleanly with bidirectional reset I/O (e.g., Motorola 68HC11) using only a single external pullup resistor-no level shifter or additional logic is required.
Is MAX6829TIUT guaranteed to assert reset correctly when VCC drops to 1.0V?
Yes. MAX6829TIUT is guaranteed to maintain valid reset assertion down to VCC = +1.0V, as stated in the General Description and confirmed in Absolute Maximum Ratings and Electrical Characteristics. This ensures reliable brownout protection even during severe undervoltage conditions.
MAX6829TIUT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.388V, 3.08V
- 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-23-6
MAX6829TIUT FAQ
1.How can I place an order for MAX6829TIUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829TIUT 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 MAX6829TIUT reliable?
The price and inventory of MAX6829TIUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829TIUT is usually 5 days.
3.What payment methods are accepted for MAX6829TIUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829TIUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829TIUT?
MAX6829TIUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829TIUT 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 MAX6829TIUT?
For technical support, including MAX6829TIUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829TIUT requirements.
6.How does Aetrix verify that MAX6829TIUT is sourced from the original manufacturer or authorized distributors?
All MAX6829TIUT 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 MAX6829TIUT meets industry standards.
7.What is the process for return or replacement of MAX6829TIUT?
All MAX6829TIUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829TIUT, 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 MAX6829TIUT part is unused and in its original packaging.
Return procedure for MAX6829TIUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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