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Analog Devices Inc./Maxim Integrated MAX6831YDUT-T
- Part No.:
- MAX6831YDUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6831YDUT-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:887
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Product details
Overview
MAX6831YDUT-T from Maxim Integrated is an ultra-low-voltage dual microprocessor supervisory IC in 6-pin SOT23 package, designed to monitor primary supply (VCC) and secondary supply (VCC2) with factory-trimmed thresholds, manual reset input (MR), and watchdog timer (WDI). It asserts an active-low open-drain RESET output when either supply drops below its threshold or WDI times out, maintaining reset for ≥140ms after recovery. It supports critical µP monitoring in battery-powered embedded systems operating down to VCC = +1.2V.
For engineers reviewing the MAX6831YDUT-T datasheet, MAX6831YDUT-T pinout, MAX6831YDUT-T application, or MAX6831YDUT-T equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior, confirmed reset threshold tolerances across temperature, and validated alternative options for dual-supply supervision in portable and multivoltage systems.
Technical Context
The MAX6831YDUT-T implements a dual-threshold supervision architecture: VCC is monitored against a preprogrammed threshold (here Y-suffix = +2.19V typ at +25°C, ±0.07V over –40°C to +125°C), while VCC2 is monitored against a factory-trimmed +2.188V threshold (±0.075V over temperature). Its open-drain RESET output enables bidirectional µP reset interfacing without contention.
It integrates a 1.6s nominal watchdog timer cleared on any WDI edge, a 50kΩ internal MR pullup, and guaranteed reset assertion validity down to VCC = +1.2V. The device requires no external components and operates with ≤30µA ICC at full temperature range, making it suitable for low-power brownout detection in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold (Y-suffix) | +2.12V to +2.25V (–40°C to +85°C); ensures reliable power-up reset for 2.1V–2.2V core supplies |
| VCC2 Threshold | +2.113V to +2.263V (–40°C to +125°C); factory-trimmed for precise secondary supply monitoring |
| Reset Timeout Period | 140ms minimum; guarantees sufficient hold time for µP initialization after supply recovery |
| Watchdog Timeout | 1.12s to 2.60s (–40°C to +125°C); provides robust software execution monitoring with thermal margin |
| RESET Output Type | Active-low open-drain; allows wired-OR reset bus and safe interface with bidirectional µP reset pins |
| Supply Current (ICC) | ≤30µA (–40°C to +125°C, VCC = +2.1V to +2.75V); enables multi-year operation in coin-cell–powered devices |
| Operating Temperature | –40°C to +125°C; qualified for industrial and extended-temperature embedded applications |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant, surface-mountable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output; sinks current during reset assertion; requires external pullup for logic-high state |
| 2 | GND | Ground reference for all internal comparators and logic; must be low-impedance connection to system ground plane |
| 3 | MR | Manual-reset input (active-low); internally pulled up to VCC with 50kΩ; debounced by design; no external RC needed |
| 4 | WDI | Watchdog input; toggling within 1.6s clears internal timer; left floating or high-Z disables watchdog function |
| 5 | VCC2 | Secondary supply input; connected directly to monitored +2.188V rail; not user-adjustable |
| 6 | VCC | Primary supply input; powers internal circuitry and sets VCC2 comparator reference; valid down to +1.2V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC (Y-threshold = +2.19V) and VCC2 (+2.188V), eliminating need for two discrete supervisors |
| Open-drain RESET with guaranteed low leakage | ≤1.0µA leakage when deasserted; enables shared reset bus and compatibility with bidirectional µP I/O pins |
| Factory-trimmed VCC2 threshold | +2.188V (±0.075V over –40°C to +125°C); removes resistor-divider calibration burden for secondary supply monitoring |
| Immunity to short VCC transients | Rejects negative-going glitches ≤20µs at 100mV under threshold; prevents spurious resets in noisy power environments |
| No external components required | Integrates pullup, watchdog timer, comparators, and delay generator; reduces BOM count and PCB area vs. discrete solutions |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
|
Use Scenario: Coin-cell–powered IoT sensor node with 2.1V MCU core and 2.2V I/O rail. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting open-drain RESET to halt MCU during brownout of either rail; watchdog monitors firmware liveness. Use Value: Prevents corrupted flash writes and undefined state during weak-battery conditions, extending field lifetime without adding passive components. |
Use Scenario: Industrial PLC controller with separate 2.1V CPU core and 2.2V peripheral I/O supply. IC Role / Device Role / Timing Role: Monitors both rails independently; triggers synchronized system reset if either falls below threshold; MR enables operator-initiated recovery. Use Value: Eliminates risk of partial initialization where CPU boots but peripherals remain unready, ensuring deterministic startup sequence. |
| Intelligent Instruments | Critical µP Monitoring |
|
Use Scenario: Handheld multimeter with segmented LCD, 2.1V ADC, and 2.2V display driver. IC Role / Device Role / Timing Role: Supervises core and display supplies; open-drain RESET interfaces cleanly with shared reset net driving multiple subsystems. Use Value: Guarantees display blanking and ADC shutdown during undervoltage, avoiding erroneous readings or visual artifacts. |
Use Scenario: Medical infusion pump MCU requiring fail-safe reset on any supply anomaly. IC Role / Device Role / Timing Role: Provides redundant supervision of primary and backup rails; watchdog enforces firmware health check; RESET asserted until both rails stabilize. Use Value: Meets IEC 62304 safety requirements by preventing runaway operation during dual-rail fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6830YDUT-T | Push-pull (active-high) RESET output instead of open-drain; same VCC/VCC2 thresholds and watchdog specs | Requires level-shifting or redesign for µPs with bidirectional reset pins; unsuitable for wired-OR reset buses | Select only when active-high push-pull interface is mandatory and shared reset nets are not used. |
| TPS3808G18DBVR | Single-supply supervisor (monitors only VCC); 1.8V fixed threshold; no VCC2 input or watchdog; SOT23-6 package | Cannot replace dual-monitoring function; lacks secondary supply supervision and WDI capability | Use only for cost-sensitive single-rail applications where VCC2 monitoring and watchdog are unnecessary. |
Compared with MAX6831YDUT-T, MAX6830YDUT-T offers identical supervision accuracy but incompatible reset polarity and drive type, while TPS3808G18DBVR omits VCC2 monitoring and watchdog entirely-neither serves as a drop-in replacement, but both address adjacent supervision needs in simpler systems.
Availability
MAX6831YDUT-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 MAX6831YDUT-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 power, sensing, and interface applications, with emphasis on reliability and integration for demanding environments.
The MAX6826–MAX6831 family was engineered specifically for ultra-low-voltage dual-rail µP supervision in space-constrained, battery-operated, and multivoltage systems-prioritizing guaranteed operation down to 1.2V, minimal quiescent current, and factory-trimmed accuracy.
FAQ
What is the exact VCC reset threshold voltage for MAX6831YDUT-T over temperature?
The MAX6831YDUT-T has a Y-suffix VCC threshold of +2.12V (min) to +2.25V (max) over –40°C to +85°C, and +2.11V (min) to +2.26V (max) over –40°C to +125°C. This is factory-programmed and specified in the Electrical Characteristics table; the value applies exclusively to the MAX6831YDUT-T variant and is distinct from other suffixes like Z or W.
Does MAX6831YDUT-T support monitoring a secondary supply lower than 2.188V?
No. The MAX6831YDUT-T features a factory-trimmed VCC2 input with a fixed +2.188V threshold (±0.075V over temperature). Unlike the MAX6826–MAX6828 series, it does not include a user-adjustable RESET IN pin; therefore, it cannot monitor voltages below or above +2.188V on the VCC2 pin.
Can MAX6831YDUT-T's watchdog timer be disabled, and how?
Yes. The watchdog timer in MAX6831YDUT-T is disabled by leaving the WDI pin unconnected or connecting it to a high-impedance (three-stated) source. When floating, the internal driver cycles low-high-low every ~1.4s, preventing timeout. No external pullup/down is required, and WDI current remains <10µA in this state.
What is the reset timeout period specification for MAX6831YDUT-T, and is it adjustable?
The MAX6831YDUT-T guarantees a minimum reset timeout period of 140ms, with typical values up to 200ms and maximum up to 280ms over –40°C to +85°C. This delay is internal and fixed-no external capacitor or resistor adjusts it. The timeout begins when all monitored supplies exceed their thresholds and ends with RESET deassertion.
Is MAX6831YDUT-T compatible with bidirectional microcontroller reset pins?
Yes. The MAX6831YDUT-T's open-drain RESET output is explicitly designed for bidirectional µP reset pins (e.g., Motorola 68HC11). It requires only a single external pullup resistor to the µP's reset rail voltage, enabling the µP to drive the line low during its own reset release sequence without contention.
MAX6831YDUT-T 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, 2.19V
- Output:
- Open Drain or Open Collector
- 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
MAX6831YDUT-T FAQ
1.How can I place an order for MAX6831YDUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6831YDUT-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 MAX6831YDUT-T reliable?
The price and inventory of MAX6831YDUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6831YDUT-T is usually 5 days.
3.What payment methods are accepted for MAX6831YDUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6831YDUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6831YDUT-T?
MAX6831YDUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6831YDUT-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 MAX6831YDUT-T?
For technical support, including MAX6831YDUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6831YDUT-T requirements.
6.How does Aetrix verify that MAX6831YDUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6831YDUT-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 MAX6831YDUT-T meets industry standards.
7.What is the process for return or replacement of MAX6831YDUT-T?
All MAX6831YDUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6831YDUT-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 MAX6831YDUT-T part is unused and in its original packaging.
Return procedure for MAX6831YDUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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