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Analog Devices Inc./Maxim Integrated MAX6829SDUT
- Part No.:
- MAX6829SDUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829SDUT.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,336
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Product details
Overview
The MAX6829SDUT from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, designed to monitor primary supply (VCC) at 1.8V and secondary supply (VCC2) at 0.9V with factory-trimmed thresholds, assert active-low push-pull RESET during brownout/power-up, and support manual reset and 1.6s watchdog timeout - used in portable battery-powered systems requiring reliable power-on reset and fault recovery.
For engineers reviewing the MAX6829SDUT datasheet, MAX6829SDUT pinout, MAX6829SDUT application, or MAX6829SDUT equivalent, key selection considerations include its dual-supply monitoring capability (1.8V/0.9V), guaranteed reset validity down to VCC = +1.0V, 140ms minimum reset timeout, open-drain vs. push-pull output configuration, and compatibility with multivoltage embedded controllers.
Technical Context
The MAX6829SDUT integrates two independent voltage comparators: one for VCC (threshold = 1.8V, suffix 'S') and one factory-trimmed for VCC2 (threshold = 0.9V, suffix 'D'), both feeding an OR logic gate that triggers reset assertion when either falls below threshold. It includes a 1.6s watchdog timer cleared by WDI edges and a manual reset input with internal 50kΩ pullup.
Reset assertion is latched and held for ≥140ms after all monitored voltages recover, ensuring µP initialization completes before release. The device operates across -40°C to +125°C, draws ≤30µA at VCC = +3.6V, and maintains functional reset output down to VCC = +1.0V - critical for low-power brownout detection in battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | 1.8V ±3% (suffix 'S'); ensures reliable reset assertion during 1.8V core supply brownout |
| VCC2 Threshold | 0.9V ±3% (suffix 'D'); factory-trimmed for accurate monitoring of 0.9V I/O or auxiliary rails |
| Reset Timeout | 140ms minimum; guarantees sufficient hold time for µP boot sequence completion |
| Watchdog Period | 1.6s nominal; detects software lockup in embedded firmware without external timing components |
| Operating Range | VCC = +1.2V to +5.5V; supports operation down to 1.2V while maintaining valid reset state |
| Supply Current | ≤30µA at VCC = +3.6V, -40°C to +125°C; enables multi-year battery life in portable devices |
| Reset Output Type | Active-low push-pull; drives reset line directly without external pullup, compatible with standard µP reset inputs |
Pinout & Package
Package: 6-pin SOT23-6, surface-mount, footprint-compatible with industry-standard 6-lead SOT23.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low during VCC/VCC2 undervoltage, MR low, or watchdog timeout |
| 2 | GND | Ground reference for all internal comparators and logic; must be connected to system ground plane |
| 3 | MR | Manual reset input, active-low with internal 50kΩ pullup to VCC; momentary GND connection forces reset |
| 4 | WDI | Watchdog input; toggling within 1.6s prevents reset; left floating or three-stated disables watchdog |
| 5 | VCC2 | Secondary supply input; connects directly to 0.9V rail being monitored (factory-trimmed threshold) |
| 6 | VCC | Primary supply input; powers internal circuitry and sets VCC threshold (1.8V for SDUT) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises 1.8V core (VCC) and 0.9V I/O (VCC2) rails with dedicated comparators |
| Guaranteed reset validity to VCC = +1.0V | Ensures deterministic reset behavior even during deep brownout, preventing undefined µP states |
| No external components required | Integrates pullup resistor on MR, precision references, timeout delay, and watchdog - reduces BOM count |
| Immunity to short negative VCC transients | Tolerates ≤20µs, 100mV VCC glitches without spurious reset - improves noise robustness in noisy environments |
| 1.6s watchdog with edge-triggered clear | Resets only on rising/falling edges of WDI - prevents false clears from stuck high/low conditions |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Wearable health monitors powered by single-cell Li-ion batteries experiencing voltage sag under load. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset when 1.8V core or 0.9V sensor interface drops below threshold during discharge. Use Value: Prevents corrupted sensor data logging and firmware crashes by enforcing clean restart before brownout-induced corruption occurs. |
Use Scenario: Industrial PLC controller with separate 1.8V FPGA core and 0.9V I/O bank, subject to intermittent rail faults. IC Role / Device Role / Timing Role: Monitors both rails independently and holds reset until both stabilize, ensuring synchronized recovery. Use Value: Eliminates partial initialization failures where only one rail recovers, avoiding inconsistent hardware state. |
| Intelligent Instruments | Automotive Systems |
Use Scenario: Handheld multimeter with low-power µC and analog front-end requiring precise power sequencing. IC Role / Device Role / Timing Role: Provides 140ms reset hold time and 1.6s watchdog to validate firmware execution post-power-up. Use Value: Guarantees ADC calibration routines complete before measurement mode activation, improving accuracy. |
Use Scenario: Body control module with 1.8V microcontroller and 0.9V CAN transceiver interface exposed to load-dump transients. IC Role / Device Role / Timing Role: Detects VCC2 collapse during transient events and asserts reset to prevent CAN bus arbitration errors. Use Value: Maintains network integrity by forcing controlled reinitialization instead of silent communication failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6829TDUT | VCC2 threshold = 1.2V (suffix 'T') instead of 0.9V; same VCC = 1.8V, package, and features | Suitable for systems with 1.2V auxiliary rail instead of 0.9V; not interchangeable without rail voltage verification | Select MAX6829TDUT only if secondary supply is 1.2V; MAX6829SDUT is correct for 0.9V VCC2. |
| TPS3808G18DBVR | Single-supply supervisor (1.8V only); no VCC2 input; 200ms reset timeout; SOT23-6 package | Lacks dual-rail monitoring; requires external circuitry to monitor second rail; lower quiescent current (1.5µA) | Use TPS3808G18DBVR only when monitoring one rail suffices; MAX6829SDUT provides integrated dual-rail supervision. |
Compared with MAX6829TDUT, MAX6829SDUT offers tighter alignment with 0.9V auxiliary rails common in modern low-voltage SoCs; versus TPS3808G18DBVR, it eliminates need for discrete resistor-divider networks or additional supervisors to cover dual-rail systems.
Availability
MAX6829SDUT is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply across automotive-grade temperature ranges (-40°C to +125°C).
Supply support for MAX6829SDUT 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 power management, sensing, and interface applications, with emphasis on high-reliability industrial and automotive solutions.
The MAX6826–MAX6831 family delivers dual-supply µP supervision in ultra-small SOT23-6 packages, targeting space-constrained, battery-sensitive systems needing guaranteed reset behavior across wide voltage and temperature ranges.
FAQ
What is the exact VCC2 reset threshold voltage for MAX6829SDUT?
The MAX6829SDUT has a factory-trimmed VCC2 reset threshold of 0.9V ±3%, corresponding to suffix 'D' in the part number. This value is specified over -40°C to +125°C and ensures accurate monitoring of 0.9V auxiliary rails without external calibration. The MAX6829SDUT datasheet confirms this threshold in the Threshold Suffix Guide and Electrical Characteristics tables.
Does MAX6829SDUT support manual reset functionality, and how is it implemented?
Yes, MAX6829SDUT includes a manual reset input (MR) on Pin 3, which is active-low with an internal 50kΩ pullup resistor to VCC. Pulling MR to GND forces an immediate reset assertion for the full timeout period (≥140ms). If unused, MR may be left floating or tied to VCC. This feature is confirmed in the Pin Description section and Functional Diagram of the MAX6829SDUT datasheet.
What is the watchdog timeout period for MAX6829SDUT, and how is it cleared?
The MAX6829SDUT features a 1.6s nominal watchdog timeout period. The internal timer is cleared by any rising or falling edge on the WDI pin (Pin 4); it is also automatically cleared during reset assertion or manual reset activation. Leaving WDI unconnected disables the watchdog function. These behaviors are explicitly defined in the MAX6829SDUT Detailed Description and Watchdog Input sections.
Is MAX6829SDUT compatible with systems requiring reset assertion down to VCC = +1.0V?
Yes, MAX6829SDUT is guaranteed to maintain valid reset output functionality down to VCC = +1.0V, as stated in the General Description and Absolute Maximum Ratings. This ensures deterministic reset behavior during deep brownout conditions where other supervisors may fail. The MAX6829SDUT specification sheet validates this performance across the full -40°C to +125°C operating range.
What package type and pin count does MAX6829SDUT use, and is it RoHS-compliant?
MAX6829SDUT uses a 6-pin SOT23-6 package, as confirmed in the Ordering Information and Package Outline sections. It is available in both leaded and lead-free versions; the '-T' suffix denotes tape-and-reel packaging, and lead-free variants are ordered using '+T'. The MAX6829SDUT package drawing (21-0058) and compliance documentation confirm RoHS compliance per Maxim's standard specifications.
MAX6829SDUT 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:
- 0.788V, 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-23-6
MAX6829SDUT FAQ
1.How can I place an order for MAX6829SDUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829SDUT 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 MAX6829SDUT reliable?
The price and inventory of MAX6829SDUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829SDUT is usually 5 days.
3.What payment methods are accepted for MAX6829SDUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829SDUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829SDUT?
MAX6829SDUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829SDUT 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 MAX6829SDUT?
For technical support, including MAX6829SDUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829SDUT requirements.
6.How does Aetrix verify that MAX6829SDUT is sourced from the original manufacturer or authorized distributors?
All MAX6829SDUT 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 MAX6829SDUT meets industry standards.
7.What is the process for return or replacement of MAX6829SDUT?
All MAX6829SDUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829SDUT, 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 MAX6829SDUT part is unused and in its original packaging.
Return procedure for MAX6829SDUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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