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Analog Devices Inc./Maxim Integrated MAX6718AUKRVD3+T
- Part No.:
- MAX6718AUKRVD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718AUKRVD3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,429
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Product details
Overview
MAX6718AUKRVD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (primary) and VCC2 (secondary) supplies with factory-trimmed reset thresholds of 4.625V (VTH1) and 3.075V (VTH2), 140ms minimum reset timeout, push-pull active-low RST output, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V. It is used in telecom power management systems to ensure reliable cold-start and brownout recovery.
For engineers reviewing the MAX6718AUKRVD3+T datasheet, MAX6718AUKRVD3+T pinout, MAX6718AUKRVD3+T application, or MAX6718AUKRVD3+T equivalent, key selection criteria include dual-voltage monitoring capability, 140ms reset timeout period, push-pull RST output referenced to VCC1, immunity to sub-20µs VCC transients, and AEC-Q100-qualified variants for automotive-grade reliability validation.
Technical Context
The MAX6718AUKRVD3+T implements independent voltage comparators for VCC1 and VCC2 with 20ppm/°C tempco and 0.5% hysteresis, feeding into a digital reset timeout timer with fixed 140ms (D3 suffix) delay. Its push-pull RST output drives high to 0.8×VCC1 at ≥1.8V supply and sinks ≤0.3V at 500µA load, ensuring deterministic logic levels without external pullups.
It features manual-reset input (MR) with internal 50kΩ pullup to VCC1, 1µs minimum pulse width, and 200ns MR-to-RST assertion delay. No watchdog, RSTIN, PFI/PFO, or WDI functionality is present - confirmed by pin mapping and suffix code "AUKRVD3", which denotes dual-supply, push-pull RST, no auxiliary inputs, and D3 (140ms) timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (typ), factory-trimmed - ensures reliable reset assertion before 5V rail collapse in host processor power domains. |
| VCC2 Reset Threshold | 3.075V (typ), factory-trimmed - matches common 3.3V I/O supply tolerance band for coordinated system-level reset timing. |
| Reset Timeout Period | 140ms (min) - provides sufficient hold time for FPGA configuration, DRAM initialization, and bootloader execution sequences. |
| Supply Current | 15µA (typ) at 3.6V - enables battery-backed operation in portable equipment with multi-year shelf life. |
| Operating Temperature | -40°C to +125°C - supports industrial and extended-temperature embedded deployments without derating. |
| Reset Output Type | Push-pull, active-low RST - eliminates need for external pullup resistor and guarantees defined logic high during normal operation. |
| VCC Immunity | Valid reset state guaranteed down to VCC1 or VCC2 = 0.8V - ensures fail-safe behavior during deep brownout conditions. |
Pinout & Package
MAX6718AUKRVD3+T is housed in a 6-pin SOT23 package (package code U6+1), with 1.6mm × 2.9mm footprint and 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 low when VCC1 < 4.625V or VCC2 < 3.075V; remains low for 140ms after recovery. |
| 2 | GND | Analog/digital ground reference for all internal comparators and output drivers; must be low-impedance connection. |
| 3 | MR | Active-low manual-reset input with internal 50kΩ pullup to VCC1; 1µs minimum pulse width; resets system on falling edge. |
| 4 | VCC2 | Secondary supply input (0.8V–5.5V); powers internal VCC2 comparator and sets RST2 reference if enabled (not used in this variant). |
| 5 | VCC1 | Primary supply input (0.8V–5.5V); powers device core, defines RST output high level (0.8×VCC1), and enables reset logic. |
| 6 | NC | No connect - pin 6 is unconnected in MAX6718AUKRVD3+T; not bonded or internally routed per pin description table. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (4.625V) and VCC2 (3.075V) supervision with separate comparators avoids single-point failure in multirail systems. |
| Fixed 140ms reset timeout | Guaranteed minimum delay prevents premature release of reset before critical peripherals (e.g., DDR memory, PLLs) stabilize. |
| Push-pull RST output | Eliminates external pullup resistor, reduces BOM count, and ensures fast, rail-to-rail logic transitions without leakage path concerns. |
| 0.8V minimum operating voltage | Enables valid reset assertion during severe brownout events where VCC drops below 1.0V - critical for fail-safe shutdown sequencing. |
| Low 15µA supply current | Minimizes quiescent drain on backup batteries or energy-harvesting sources in always-on monitoring applications. |
Applications
| Telecom Power Sequencing | Industrial PLC Controller |
|---|---|
Use Scenario: Monitoring primary 5V and secondary 3.3V rails in carrier-grade line cards during hot-swap insertion and AC power interruption. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset to ARM Cortex-A9 processor and FPGA fabric upon either rail undervoltage. Use Value: Prevents metastability and configuration corruption by enforcing 140ms reset hold time aligned with FPGA TCONFIG spec. |
Use Scenario: Ensuring deterministic startup and fault recovery in DIN-rail mounted programmable logic controllers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary reset generator coordinating CPU, CAN transceiver, and analog I/O power-up sequence across -40°C to +125°C range. Use Value: Guarantees reset validity down to 0.8V VCC allows safe shutdown during 12V battery sag to 9V under load. |
| Server Baseboard Management | Medical Diagnostic Imaging |
Use Scenario: Supervising standby (3.3V) and main (5V) power domains in BMC (Baseboard Management Controller) subsystems. IC Role / Device Role / Timing Role: Fail-safe reset source for ASPEED AST2500 BMC SoC, triggered independently on either supply collapse. Use Value: Push-pull RST output eliminates pullup resistor, reducing thermal stress on densely packed server PCBs. |
Use Scenario: Providing certified reset assurance in FDA-cleared ultrasound front-end modules requiring IEC 62304 Class C software safety compliance. IC Role / Device Role / Timing Role: Hardware-enforced reset initiator for TI C6748 DSP, activated only when both 1.8V core and 3.3V analog supplies meet threshold stability. Use Value: 20ppm/°C tempco ensures <±10mV threshold drift over full temperature range - meeting diagnostic accuracy traceability 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 |
|---|---|---|---|
| MAX6717AUKRVD3+T | Open-drain RST output instead of push-pull; requires external pullup resistor; identical VTH1/VTH2 and 140ms timeout. | Suitable where system already uses pullup on reset bus or where level translation to 1.8V logic is needed. | Select MAX6717AUKRVD3+T only if open-drain interface is required for wired-OR reset arbitration. |
| TPS3808G33DBVR | Single-supply (3.3V only) supervisor; 3.08V threshold; 200ms timeout; different pinout (SOT23-6 but pin 1 = GND, pin 2 = VDD). | Limited to 3.3V-only monitoring; lacks VCC2 input; no manual reset input; not suitable for dual-rail coordination. | Choose TPS3808G33DBVR only for cost-sensitive single-rail applications where VCC2 supervision is unnecessary. |
Compared with MAX6717AUKRVD3+T and TPS3808G33DBVR, MAX6718AUKRVD3+T uniquely delivers dual-rail supervision with push-pull drive, eliminating external components while maintaining precise 140ms timing - making it optimal for space-constrained, high-reliability multivoltage systems.
Availability
MAX6718AUKRVD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical imaging equipment requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6718AUKRVD3+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 connectivity in demanding environments.
The MAX6715A–MAX6729A family was engineered specifically for multivoltage microprocessor supervision in space-constrained, high-reliability applications such as networking gear and industrial control systems.
FAQ
What is the reset threshold voltage for VCC1 on the MAX6718AUKRVD3+T?
The MAX6718AUKRVD3+T has a factory-trimmed VCC1 reset threshold of 4.625V (typical), with min/max values of 4.500V and 4.750V respectively. This value is fixed by the "R" suffix in the ordering code and applies across the full -40°C to +125°C operating range with 20ppm/°C tempco.
Does the MAX6718AUKRVD3+T support manual reset functionality?
Yes, the MAX6718AUKRVD3+T includes an active-low manual-reset input (MR) on pin 3, featuring an internal 50kΩ pullup to VCC1. A logic-low pulse ≥1µs on MR forces RST low for the full 140ms timeout period, enabling operator-initiated or test-system-triggered resets without external components.
Is the MAX6718AUKRVD3+T compatible with 1.8V logic systems?
No - the MAX6718AUKRVD3+T's push-pull RST output is referenced to VCC1 and delivers VOH = 0.8×VCC1. With minimum VCC1 = 0.8V, its high-level output cannot reliably drive 1.8V CMOS inputs. For 1.8V systems, use open-drain variants like MAX6717AUKRVD3+T with appropriate pullup.
What is the function of pin 6 on the MAX6718AUKRVD3+T?
Pin 6 on the MAX6718AUKRVD3+T is NC (no connect). Per Maxim's official pin description table, this pin is unconnected internally and must remain floating - no routing, grounding, or pulling is permitted. It is not a reserved or future-function pin.
Can the MAX6718AUKRVD3+T monitor a third voltage rail?
No - the MAX6718AUKRVD3+T is a dual-supply supervisor only. It lacks RSTIN, PFI, or WDI pins (confirmed by pin mapping and suffix "AUKRVD3"). To monitor three rails, select variants like MAX6719AUKRVD3+T (with RSTIN) or MAX6728AUKRVD3+T (with PFI/PFO).
MAX6718AUKRVD3+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:
- 1.575V, 2.625V
- 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-23-5
MAX6718AUKRVD3+T FAQ
1.How can I place an order for MAX6718AUKRVD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718AUKRVD3+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 MAX6718AUKRVD3+T reliable?
The price and inventory of MAX6718AUKRVD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718AUKRVD3+T is usually 5 days.
3.What payment methods are accepted for MAX6718AUKRVD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718AUKRVD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718AUKRVD3+T?
MAX6718AUKRVD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718AUKRVD3+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 MAX6718AUKRVD3+T?
For technical support, including MAX6718AUKRVD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718AUKRVD3+T requirements.
6.How does Aetrix verify that MAX6718AUKRVD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6718AUKRVD3+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 MAX6718AUKRVD3+T meets industry standards.
7.What is the process for return or replacement of MAX6718AUKRVD3+T?
All MAX6718AUKRVD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718AUKRVD3+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 MAX6718AUKRVD3+T part is unused and in its original packaging.
Return procedure for MAX6718AUKRVD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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