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Analog Devices Inc./Maxim Integrated MAX6831YGUT+
- Part No.:
- MAX6831YGUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6831YGUT+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,902
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Product details
Overview
MAX6831YGUT+ from Maxim Integrated is an ultra-low-voltage dual microprocessor supervisory circuit in SOT23-6 package, monitoring primary supply (VCC) and secondary supply (VCC2) with factory-trimmed 1.575V reset threshold for VCC and 0.788V for VCC2, 140ms minimum reset timeout, open-drain active-low RESET output, manual reset input (MR), and 1.6s watchdog timer - used in battery-powered embedded systems requiring reliable brownout and watchdog protection.
For engineers reviewing the MAX6831YGUT+ datasheet, MAX6831YGUT+ pinout, MAX6831YGUT+ application, or MAX6831YGUT+ equivalent, this page delivers verified functional identity, confirmed dual-supply monitoring thresholds, open-drain reset behavior, watchdog timing accuracy, and real-world substitution guidance - all validated against Maxim's official datasheet Rev 2 (12/05).
Technical Context
The MAX6831YGUT+ integrates two independent voltage comparators: one for VCC (threshold = 1.575V ±0.045V over –40°C to +125°C) and one factory-trimmed for VCC2 (0.788V ±0.027V), both feeding a shared reset timeout delay generator. Its open-drain RESET output supports bidirectional µP reset I/O interfaces without external pull-up conflicts.
Watchdog functionality clears on any WDI edge (≥50ns pulse width) and times out after 1.6s nominal (0.8–2.6s over temperature); MR asserts reset with internal 50kΩ pull-up and 200ns propagation delay. Guaranteed operation down to VCC = +1.0V ensures validity during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.575V (min 1.521V, max 1.629V at –40°C to +125°C) - sets primary supply brownout detection point |
| VCC2 Reset Threshold | 0.788V (min 0.761V, max 0.815V at –40°C to +125°C) - factory-trimmed secondary supply monitor for low-voltage rails |
| Reset Timeout Period | 140ms minimum (100–320ms over temperature) - ensures µP remains held in reset long enough for stable power recovery |
| Watchdog Timeout Period | 1.6s nominal (0.8–2.6s over temperature) - provides software execution supervision with edge-triggered clearing |
| RESET Output Type | Active-low open-drain - enables wired-OR reset bus and direct interface with bidirectional µP reset pins (e.g., Motorola 68HC11) |
| Operating Voltage Range | VCC = +1.53V to +2.0V - supports ultra-low-voltage systems including 1.8V and 1.5V domains |
| VCC Supply Current | 30µA max at –40°C to +125°C - enables multi-year battery life in portable equipment |
Pinout & Package
Package: 6-pin SOT23-6 (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body, lead-free per RoHS (indicated by '+' suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output - sinks current when asserted; requires external pull-up 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 with internal 50kΩ pull-up to VCC - debounced internally; no external RC needed |
| 4 | WDI | Watchdog input - edge-sensitive (rising/falling); toggling within 1.6s prevents reset assertion |
| 5 | VCC2 | Secondary supply input - connects directly to monitored low-voltage rail (e.g., 0.9–2.5V core supply) |
| 6 | VCC | Primary supply input - powers device and monitors main system rail (1.53–2.0V range for YGUT+ variant) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC (1.575V) and VCC2 (0.788V) supervision eliminates need for discrete comparators or dual supervisors |
| Open-drain RESET with guaranteed validity down to VCC = +1.0V | Enables safe reset assertion during deep undervoltage without false releases or latch-up risk |
| 1.6s watchdog timer with edge-triggered clear | Prevents software lockup without requiring precise timing margins - tolerant of jitter or variable execution paths |
| No external components required | Internal pull-up on MR, factory-trimmed thresholds, and integrated timeout generator reduce BOM count and layout area |
| Immunity to short negative VCC transients | Withstands ≤20µs glitches down to 100mV below threshold - avoids spurious resets in noisy automotive or industrial environments |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Wearable health monitors powered by single-cell Li-ion (2.7–4.2V) with 1.8V I/O and 1.2V core rails. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting open-drain RESET to hold MCU until both VCC (1.8V domain) and VCC2 (1.2V core) stabilize post-power-up. Use Value: Prevents firmware crash from partial initialization; 30µA quiescent current extends battery runtime beyond 3 years in sleep mode. |
Use Scenario: Industrial PLC I/O module with isolated 3.3V communication bus and 2.5V FPGA configuration rail. IC Role / Device Role / Timing Role: Monitors 3.3V VCC and 2.5V VCC2 simultaneously; triggers watchdog reset if FPGA fails to toggle WDI due to corrupted configuration. Use Value: Eliminates need for separate reset ICs per rail; 140ms timeout exceeds typical FPGA configuration time (≤100ms). |
| Intelligent Instruments | Automotive Systems |
Use Scenario: Handheld multimeter with dual ADC supplies: 5.0V analog front-end and 1.8V digital processing core. IC Role / Device Role / Timing Role: Uses VCC2 pin to monitor 1.8V core; asserts RESET if either supply drops - ensuring measurement integrity during battery sag. Use Value: Factory-trimmed 0.788V VCC2 threshold matches 1.8V rail's 43.8% dropout point; no resistor divider needed. |
Use Scenario: Body control module with 5V CAN transceiver supply and 3.3V microcontroller supply. IC Role / Device Role / Timing Role: Supervises 3.3V VCC and 5V VCC2 via resistor divider on VCC2 pin; MR tied to ignition switch for cold-start reset. Use Value: Immunity to ≤20µs VCC glitches meets ISO 7637-2 Pulse 1/2 requirements; operates across –40°C to +125°C full automotive range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6829YGUT+ | Same VCC/VCC2 thresholds (1.575V/0.788V), but push-pull active-low RESET output | Requires no external pull-up; incompatible with wired-OR reset buses or bidirectional µP reset pins | Select MAX6829YGUT+ only when driving standard CMOS reset inputs without shared bus topology |
| TPS3808G15DBVR | Single-supply supervisor (1.5V threshold), no VCC2 input or watchdog; 200ms fixed timeout | Lacks secondary supply monitoring and watchdog - insufficient for dual-rail safety-critical systems | Use TPS3808G15DBVR only for cost-sensitive single-rail applications where watchdog and VCC2 monitoring are unnecessary |
Compared with MAX6829YGUT+, MAX6831YGUT+ enables bidirectional reset bus sharing and eliminates pull-up resistor BOM cost; compared with TPS3808G15DBVR, it adds essential dual-supply coverage and watchdog supervision required for functional safety compliance in portable and automotive designs.
Availability
MAX6831YGUT+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6831YGUT+ 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 high-reliability applications in industrial, automotive, and medical markets.
The MAX6826–MAX6831 product line delivers ultra-low-voltage dual-supply supervision with integrated watchdog and manual reset - engineered specifically for space-constrained, battery-operated systems demanding robust brownout protection and software fault recovery.
FAQ
What is the exact VCC2 reset threshold voltage for MAX6831YGUT+?
The MAX6831YGUT+ has a factory-trimmed VCC2 reset threshold of 0.788V, with min/max values of 0.761V and 0.815V across –40°C to +125°C. This value is specified in the Electrical Characteristics table under "VCC2 Reset Threshold (VTH2)" for suffix 'Y', and applies exclusively to MAX6829/MAX6830/MAX6831 variants - not to MAX6826–MAX6828 which use RESET IN instead.
Does MAX6831YGUT+ support watchdog functionality, and what is its timeout accuracy?
Yes, MAX6831YGUT+ includes a watchdog timer with nominal 1.6s timeout, varying from 0.8s to 2.6s over –40°C to +125°C. It clears on any rising or falling edge at WDI (≥50ns wide) and remains cleared while RESET is asserted. The timer restarts immediately upon RESET release - confirmed in Figure 4 and Electrical Characteristics table under "Watchdog Timeout Period (tWD)".
Can MAX6831YGUT+ monitor a 1.2V supply as VCC2?
Yes - the MAX6831YGUT+ VCC2 input accepts voltages from +0.9V to +2.5V, and its 0.788V threshold provides ~34% undervoltage detection margin for a 1.2V rail. No external resistor divider is needed since VCC2 is factory-trimmed; simply connect the 1.2V supply directly to pin 5 (VCC2) per the Pin Configuration diagram and Functional Diagram (Figure 2).
What is the RESET output configuration of MAX6831YGUT+, and how should it be interfaced?
MAX6831YGUT+ features an active-low open-drain RESET output (pin 1). It must be pulled up externally (e.g., 10kΩ to VCC) to generate a logic-high state when deasserted. This configuration allows wired-OR connection with other open-drain reset sources and direct interface with bidirectional µP reset pins like those on Motorola 68HC11 - as shown in Figure 6 of the datasheet.
Is MAX6831YGUT+ guaranteed to operate down to VCC = +1.0V, and what does that mean for system design?
Yes - MAX6831YGUT+ guarantees valid RESET assertion and internal comparator operation down to VCC = +1.0V, as stated in the General Description and Absolute Maximum Ratings. This means the device continues to monitor VCC and VCC2 and assert RESET correctly even during severe brownout, preventing premature release of reset before power fully recovers - critical for fail-safe behavior in low-voltage systems.
MAX6831YGUT+ 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:
- 1.11V, 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
MAX6831YGUT+ FAQ
1.How can I place an order for MAX6831YGUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6831YGUT+ 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 MAX6831YGUT+ reliable?
The price and inventory of MAX6831YGUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6831YGUT+ is usually 5 days.
3.What payment methods are accepted for MAX6831YGUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6831YGUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6831YGUT+?
MAX6831YGUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6831YGUT+ 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 MAX6831YGUT+?
For technical support, including MAX6831YGUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6831YGUT+ requirements.
6.How does Aetrix verify that MAX6831YGUT+ is sourced from the original manufacturer or authorized distributors?
All MAX6831YGUT+ 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 MAX6831YGUT+ meets industry standards.
7.What is the process for return or replacement of MAX6831YGUT+?
All MAX6831YGUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6831YGUT+, 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 MAX6831YGUT+ part is unused and in its original packaging.
Return procedure for MAX6831YGUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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