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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:5,607
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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 factory-trimmed supply (VCC2) with open-drain RESET output, manual reset input (MR), and watchdog timer (WDI). It asserts reset when VCC falls below 1.575V (±30mV), VCC2 falls below 0.788V (±25mV), or MR is pulled low, maintaining reset for ≥140ms after recovery - used in battery-powered embedded controllers requiring reliable brownout protection.
For engineers reviewing the MAX6831YGUT datasheet, MAX6831YGUT pinout, MAX6831YGUT application, or MAX6831YGUT equivalent, this page delivers verified electrical thresholds, watchdog timing, reset output behavior, thermal stability data across –40°C to +125°C, and real-world interfacing guidance for bidirectional µP reset pins and noise-immune manual reset circuits.
Technical Context
The MAX6831YGUT integrates two independent voltage monitors: a factory-trimmed VCC2 comparator with 0.788V threshold (±25mV over –40°C to +125°C) and a primary VCC monitor set to 1.575V (±30mV), both feeding an OR logic gate that triggers the open-drain RESET output. Its watchdog timer has a nominal 1.6s timeout (0.80s–2.60s over temperature), cleared by any WDI edge or reset assertion.
Reset assertion is guaranteed valid down to VCC = +1.0V, with immunity to negative VCC transients ≤20µs at 100mV overdrive. The device uses BiCMOS process (750 transistors), draws ≤30µA at +125°C (VCC = +1.8V), and requires no external components beyond pull-up for open-drain RESET.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.575V ±30mV (factory-trimmed; ensures reliable power-on reset for 1.6V–1.8V core supplies) |
| VCC2 Reset Threshold | 0.788V ±25mV (factory-trimmed; monitors 0.9V–2.5V secondary rails without external resistors) |
| Reset Timeout Period | ≥140ms (guaranteed minimum delay prevents premature µP release during slow-rising supplies) |
| Watchdog Timeout | 1.6s nominal (0.80s–2.60s over –40°C to +125°C; detects µP lockup in real-time firmware) |
| RESET Output Type | Open-drain (supports bidirectional µP reset I/O like Motorola 68HC11 with single pull-up resistor) |
| Supply Current | ≤30µA at +125°C (enables multi-year operation in coin-cell–powered IoT sensors) |
| Operating Temperature | –40°C to +125°C (qualified for automotive under-hood and industrial control environments) |
Pinout & Package
MAX6831YGUT is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), lead-free, RoHS-compliant, with thermal pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output; requires external pull-up; sinks ≥1.2mA at VCC ≥ 2.55V |
| 2 | GND | Ground reference for all internal comparators and logic; must be low-impedance connection |
| 3 | MR | Manual reset input (active-low); internally pulled up to VCC with 50kΩ; accepts CMOS levels or open-drain signals |
| 4 | WDI | Watchdog input; edge-sensitive (50ns min pulse); disabled if left floating or three-stated |
| 5 | VCC2 | Secondary supply input; factory-trimmed comparator input for 0.9V–2.5V rails; no external components needed |
| 6 | VCC | Primary supply input; powers internal circuitry and sets VCC monitor threshold (1.575V for YGUT) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC (1.575V) and VCC2 (0.788V) with separate comparators and hysteresis |
| Guaranteed reset validity to VCC = +1.0V | Ensures clean reset assertion even during deep brownout conditions before full power collapse |
| No external components required | Factory-trimmed thresholds eliminate resistor dividers, reducing BOM count and layout area in space-constrained designs |
| Immunity to short negative VCC transients | Withstands ≤20µs glitches at 100mV overdrive without spurious reset - critical for noisy automotive power rails |
| Open-drain RESET for bidirectional µP interfaces | Directly drives Motorola 68HC11 and similar µPs with shared reset I/O using one external pull-up resistor |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Coin-cell–powered glucose monitor with ARM Cortex-M0+ MCU operating at 1.8V core and 0.9V sensor interface rail. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting open-drain RESET to prevent code execution during battery voltage sag below 1.575V (VCC) or 0.788V (VCC2). Use Value: Eliminates need for discrete voltage detectors and RC timers, reducing solution size by 40% and enabling 10-year shelf life. |
Use Scenario: Under-dash lighting controller exposed to load-dump transients and cold-cranking voltage dips. IC Role / Device Role / Timing Role: Monitors 1.6V microcontroller core supply and 1.2V CAN transceiver supply, holding RESET active until both stabilize post-dip. Use Value: Prevents firmware corruption during 12V system brownouts; 140ms timeout exceeds typical alternator recovery time. |
| Industrial PLC I/O Modules | Smart Energy Meters |
|
Use Scenario: DIN-rail mounted I/O module with isolated 3.3V logic and 2.5V analog front-end, operating in –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Supervises primary 3.3V rail and secondary 2.5V rail via VCC/VCC2 inputs; MR tied to front-panel reset button. Use Value: Factory-trimmed thresholds ensure ±0.5% accuracy across temperature - tighter than resistor-divider alternatives. |
Use Scenario: Revenue-grade electricity meter with dual-core SoC (1.2V CPU, 1.0V ADC), deployed in outdoor enclosures. IC Role / Device Role / Timing Role: Uses WDI to detect firmware hangs in metrology firmware; VCC2 monitors 1.0V ADC supply independently. Use Value: 1.6s watchdog timeout aligns with IEC 62056-21 metering protocol watchdog requirements. |
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 | Push-pull active-low RESET output; same VCC/VCC2 thresholds (1.575V/0.788V); no open-drain capability | Requires level-shifting for bidirectional µP reset pins; unsuitable for shared-reset bus architectures | Select MAX6829YGUT only when driving standard active-low reset inputs without pull-up constraints |
| TPS3808G15DBVR | Single-supply supervisor (1.5V threshold); no VCC2 input; fixed 200ms reset timeout; push-pull output | Cannot monitor secondary rail; lacks watchdog and manual reset; limited to basic power-on reset | Choose TPS3808G15DBVR only for cost-sensitive single-rail applications where VCC2 supervision is unnecessary |
Compared with MAX6829YGUT, MAX6831YGUT enables direct interface to bidirectional reset I/O without level shifters; versus TPS3808G15DBVR, it adds critical dual-rail monitoring, watchdog safety, and manual reset - essential for functional safety in industrial and automotive systems.
Availability
MAX6831YGUT is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, and industrial PLC I/O modules 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 demanding industrial, automotive, and communications applications.
The MAX6826–MAX6831 family was engineered specifically for ultra-low-voltage dual-rail supervision in battery-powered and multivoltage embedded systems, emphasizing guaranteed operation down to VCC = +1.0V and factory-trimmed accuracy.
FAQ
What is the exact VCC2 reset threshold voltage for MAX6831YGUT?
The MAX6831YGUT has a factory-trimmed VCC2 reset threshold of 0.788V, with tolerance of ±25mV over the full –40°C to +125°C temperature range. This value is specified in the Electrical Characteristics table under "VCC2 Reset Threshold (VTH2)" for suffix 'Y', and is confirmed in the Threshold Suffix Guide. The MAX6831YGUT does not require external resistors to set this threshold.
Does MAX6831YGUT support watchdog functionality, and what is its timeout range?
Yes, MAX6831YGUT includes a watchdog timer with a nominal timeout of 1.6s. Over temperature (–40°C to +125°C), the actual timeout ranges from 0.80s to 2.60s, as documented in the Electrical Characteristics table. The timer clears on any rising or falling edge at WDI, or during reset assertion, and is disabled if WDI is left unconnected or three-stated.
Can MAX6831YGUT monitor a 1.0V supply rail?
No - MAX6831YGUT's VCC2 input is factory-trimmed for 0.788V (suffix 'Y'), and its VCC monitor is set to 1.575V (suffix 'G'). While it guarantees reset validity down to VCC = +1.0V, it cannot *monitor* a 1.0V rail as a secondary supply. For 1.0V supervision, consider MAX6831VGUT (VCC2 = 1.575V) or use the adjustable RESET IN feature of MAX6826/MAX6827/MAX6828 variants.
What is the function of Pin 5 on MAX6831YGUT, and how should it be connected?
Pin 5 on MAX6831YGUT is VCC2 - the dedicated input for the factory-trimmed secondary supply monitor. It must be connected directly to the secondary voltage rail (e.g., 0.9V–2.5V) being supervised. No external components are required. Do not leave it floating; tie to GND only if unused (though this may cause false reset assertion).
Is MAX6831YGUT pin-compatible with other devices in the MAX6826–MAX6831 family?
Yes, all MAX6826–MAX6831 devices share identical SOT23-6 pinout and footprint. However, function differs per variant: MAX6831YGUT uses Pin 1 as open-drain RESET and Pin 5 as VCC2, while MAX6826YGUT uses Pin 1 as open-drain RESET and Pin 5 as RESET IN. Always verify functional mapping - not just pin count - before substitution.
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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