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Analog Devices Inc./Maxim Integrated MAX6718AUKVDD3+T
- Part No.:
- MAX6718AUKVDD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718AUKVDD3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,144
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Product details
Overview
MAX6718AUKVDD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (primary) and VCC2 (secondary) with factory-trimmed reset thresholds of 4.625V (VTH1) and 3.075V (VTH2), 1.1ms minimum reset timeout, push-pull active-low RST output, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in telecom power management and industrial embedded systems requiring reliable brownout detection.
For engineers reviewing the MAX6718AUKVDD3+T datasheet, MAX6718AUKVDD3+T pinout, MAX6718AUKVDD3+T application, or MAX6718AUKVDD3+T equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), low 14µA typical supply current at 3.6V, immunity to sub-20µs VCC transients, and compatibility with manual-reset and watchdog-free system architectures.
Technical Context
The MAX6718AUKVDD3+T integrates two independent voltage comparators with internal 0.5% hysteresis and a precision 1.1ms reset timeout timer. It asserts RST when either VCC1 falls below 4.625V or VCC2 drops below 3.075V, holding reset for ≥1.1ms after both supplies recover above their thresholds.
Its push-pull RST output is referenced to VCC1 and delivers VOH ≥ 0.8×VCC1 (at ISOURCE = 200µA) and VOL ≤ 0.3V (at ISINK = 1.2mA), while MR input features a 50kΩ internal pullup and supports CMOS-level triggering with <1µs pulse width tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (typ), ±1.5% over -40°C to +125°C - ensures precise 4.5–4.75V brownout detection for 5V logic rails |
| VCC2 Reset Threshold | 3.075V (typ), ±1.5% over -40°C to +125°C - enables accurate monitoring of 3.3V auxiliary supplies |
| Reset Timeout Period | 1.1ms (min), fixed - provides sufficient hold time for µP initialization without excessive system delay |
| Supply Current | 14µA (typ) at 3.6V - minimizes quiescent power in battery-backed or energy-sensitive applications |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Reset Output Type | Push-pull, active-low RST - eliminates need for external pullup and ensures fast, rail-to-rail logic transitions |
| MR Input Pullup | 50kΩ internal to VCC1 - simplifies manual-reset implementation with momentary switch to GND only |
Pinout & Package
SOT23-6 package (package code U6+1), 1.6mm × 2.9mm footprint, 0.95mm height, thermal resistance θJA = 115°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts when VCC1 < 4.625V or VCC2 < 3.075V |
| 2 | GND | System ground reference for all internal comparators and timing circuits |
| 3 | MR | Active-low manual-reset input with 50kΩ internal pullup to VCC1; resets system on logic-low pulse ≥1µs |
| 4 | VCC2 | Secondary supply input (0.8V–5.5V); powers internal VCC2 comparator and sets RST2 reference if present |
| 5 | VCC1 | Primary supply input (0.8V–5.5V); powers device core, defines RST output swing, and enables reset assertion |
| 6 | NC | No-connect terminal - left unconnected per datasheet; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (4.625V) and VCC2 (3.075V) supervision with separate comparators and hysteresis |
| Guaranteed reset validity at low VCC | Functional reset assertion and release guaranteed even when VCC1 or VCC2 = 0.8V |
| Transient-immune reset generation | Immunity to VCC glitches <20µs duration (at 100mV overdrive), reducing false resets in noisy power environments |
| Low-power operation | 14µA typical ICC at 3.6V enables use in always-on subsystems without compromising battery life |
| Integrated MR pullup | 50kΩ internal pullup eliminates external resistor, enabling direct switch-to-GND manual reset with no BOM overhead |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring primary 5V and secondary 3.3V rails in line-card power supplies where undervoltage must trigger immediate processor halt before data corruption occurs. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting push-pull RST within 20µs of VCC1 drop below 4.625V, holding reset ≥1.1ms for safe µP shutdown. Use Value: Prevents firmware lockup during AC/DC converter brownout by guaranteeing reset validity down to 0.8V on either rail. |
Use Scenario: Ensuring deterministic startup and fault recovery in DIN-rail mounted programmable logic controllers exposed to wide ambient temperature swings (-40°C to +85°C). IC Role / Device Role / Timing Role: Supervising VCC1 (5V system rail) and VCC2 (3.3V FPGA I/O bank) with factory-trimmed thresholds and 125°C max operating range. Use Value: Eliminates need for external RC timing networks while maintaining AEC-Q100-aligned reliability across extended temperature profiles. |
| Server Management Controllers | Medical Diagnostic Equipment |
Use Scenario: Providing fail-safe reset coordination between baseboard management controller (BMC) and host CPU in redundant 12V/5V/3.3V server power domains. IC Role / Device Role / Timing Role: Dual-supply monitor with MR input enabling BMC-initiated warm reset without altering main CPU reset path. Use Value: Enables independent reset sequencing via MR while maintaining synchronized VCC1/VCC2 brownout response. |
Use Scenario: Supervising isolated 5V analog front-end and 3.3V digital processing rails in portable ultrasound units requiring zero-reset-failure operation during battery discharge cycles. IC Role / Device Role / Timing Role: Low-current (14µA typ) dual-supply supervisor ensuring reset integrity as battery voltage decays from 4.8V to 3.2V. Use Value: Extends usable battery runtime by minimizing quiescent draw while preserving critical reset functionality down to 0.8V supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6717AUKTVD3+T | Open-drain RST output, same thresholds and timeout; requires external pullup resistor | Used where level-shifting or wired-OR reset bus is required; incompatible with direct µP reset pin without pullup | Select when system needs shared reset bus or interfacing with bidirectional µP reset pins |
| TLV809E33DBZR | Single-supply (3.3V only), 200ms timeout, 1.6µA supply current, SOT23-3 package | Monitors only one rail; lacks VCC2 input, MR, or dual-threshold capability | Choose only for cost-sensitive single-rail applications where dual monitoring is unnecessary |
Compared with MAX6717AUKTVD3+T, the MAX6718AUKVDD3+T eliminates external pullup components and reduces layout complexity; versus TLV809E33DBZR, it adds full dual-supply supervision, manual reset, and faster 1.1ms timeout - making it suitable for systems requiring coordinated multi-rail power integrity.
Availability
MAX6718AUKVDD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical diagnostic equipment requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for MAX6718AUKVDD3+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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications, with emphasis on reliability and integration for demanding environments.
The MAX6715A–MAX6729A family delivers compact, ultra-low-voltage supervisory circuits optimized for dual- and triple-rail systems in space-constrained, thermally harsh applications such as networking gear and automotive ECUs.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6718AUKVDD3+T?
The MAX6718AUKVDD3+T has factory-trimmed reset thresholds of 4.625V (typ) for VCC1 and 3.075V (typ) for VCC2, with ±1.5% tolerance over the full -40°C to +125°C operating range. These values are defined by the "VDD3" suffix per Maxim's Reset Voltage Threshold Suffix Guide and confirmed in the Electrical Characteristics table of the official datasheet.
Does the MAX6718AUKVDD3+T support manual reset, and how is it implemented?
Yes, the MAX6718AUKVDD3+T supports manual reset via its MR pin (Pin 3), which features an internal 50kΩ pullup resistor to VCC1. Driving MR low for ≥1µs forces an active-low reset assertion on RST, which remains asserted for the full 1.1ms timeout period after MR returns high. No external components are needed beyond a momentary switch to GND.
Is the MAX6718AUKVDD3+T compatible with systems where VCC1 drops below 1.0V during power-down?
Yes - the MAX6718AUKVDD3+T guarantees valid reset output logic states as long as either VCC1 or VCC2 remains ≥0.8V. This allows clean reset assertion and release during controlled brownout sequences common in battery-powered or hot-swap systems, unlike many supervisors that lose reset validity below 1.2V.
What package type and footprint does the MAX6718AUKVDD3+T use?
The MAX6718AUKVDD3+T uses the SOT23-6 package (package code U6+1), with a 1.6mm × 2.9mm body size, 0.95mm maximum height, and standard JEDEC MO-178AC outline. Its land pattern matches Mouser/Digi-Key recommended footprint #90-0175, supporting reflow soldering on standard PCB assemblies.
Does the MAX6718AUKVDD3+T include watchdog or power-fail functionality?
No - the MAX6718AUKVDD3+T is a dual-supply supervisory circuit without watchdog timer (WDI), power-fail input (PFI), or power-fail output (PFO) functions. These features are present only in other variants like MAX6721A (watchdog) or MAX6728A (PFI/PFO). The "VDD3" suffix confirms it is the basic dual-threshold, MR-enabled version.
MAX6718AUKVDD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 0.788V, 1.575V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6718AUKVDD3+T FAQ
1.How can I place an order for MAX6718AUKVDD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718AUKVDD3+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 MAX6718AUKVDD3+T reliable?
The price and inventory of MAX6718AUKVDD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718AUKVDD3+T is usually 5 days.
3.What payment methods are accepted for MAX6718AUKVDD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718AUKVDD3+T transactions.
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4.How is shipping managed for MAX6718AUKVDD3+T?
MAX6718AUKVDD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718AUKVDD3+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 MAX6718AUKVDD3+T?
For technical support, including MAX6718AUKVDD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718AUKVDD3+T requirements.
6.How does Aetrix verify that MAX6718AUKVDD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6718AUKVDD3+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 MAX6718AUKVDD3+T meets industry standards.
7.What is the process for return or replacement of MAX6718AUKVDD3+T?
All MAX6718AUKVDD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718AUKVDD3+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 MAX6718AUKVDD3+T part is unused and in its original packaging.
Return procedure for MAX6718AUKVDD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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