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Analog Devices Inc./Maxim Integrated MAX6718UKVDD3
- Part No.:
- MAX6718UKVDD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718UKVDD3.pdf
- Description:
- IC SUPERVISOR UP SUP CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:319
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Product details
Overview
MAX6718UKVDD3 from Maxim Integrated is a dual-voltage microprocessor supervisory IC in 5-pin SOT23 package, monitoring VCC1 (primary supply) and VCC2 (secondary supply) with factory-trimmed reset thresholds of 3.075V (VTH1) and 1.665V (VTH2), 210ms minimum reset timeout, push-pull active-low RST output, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in portable battery-powered systems requiring reliable power-up sequencing and brownout protection.
For engineers reviewing the MAX6718UKVDD3 datasheet, MAX6718UKVDD3 pinout, MAX6718UKVDD3 application, or MAX6718UKVDD3 equivalent, key selection criteria include dual-supply threshold accuracy, low 14µA typical supply current at 3.6V, immunity to sub-100ns VCC transients, push-pull RST drive capability referenced to VCC1, and operation across -40°C to +125°C industrial temperature range.
Technical Context
The MAX6718UKVDD3 integrates two independent voltage comparators with hysteresis (0.5% typical) and a precision internal reference (626.5mV for auxiliary monitoring), enabling simultaneous supervision of primary (1.8–5.0V) and secondary (0.9–3.3V) rails. Its reset logic asserts RST low when either VCC1 falls below 3.075V or VCC2 drops below 1.665V, holding reset for ≥210ms after both supplies recover.
It features a push-pull RST output referenced to VCC1 with VOH ≥ 0.8×VCC1 (at ISOURCE = 200µA) and VOL ≤ 0.4V (at ISINK = 3.2mA), eliminating need for external pullup. The device guarantees valid reset state even when VCC1 or VCC2 decays to 0.8V, supporting robust low-voltage system shutdown sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 3.075V (factory-trimmed, ±1.5% over temp) - sets precise brownout detection point for main system rail |
| VCC2 Reset Threshold | 1.665V (factory-trimmed, ±1.5% over temp) - enables reliable core voltage monitoring in low-power SoC designs |
| Reset Timeout Period | 210ms (minimum) - ensures µP completes full initialization before release from reset |
| Supply Current | 14µA (typical at 3.6V) - minimizes quiescent drain in always-on battery backup circuits |
| Operating Temperature | -40°C to +125°C - supports automotive under-hood and industrial control applications |
| Reset Output Type | Push-pull active-low RST - drives directly into µP reset pin without external pullup resistor |
| VCC Validity Guarantee | Reset logic remains valid down to VCC1 or VCC2 = 0.8V - enables deterministic behavior during deep brownout |
Pinout & Package
MAX6718UKVDD3 is housed in a 5-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), surface-mount, RoHS-compliant, with thermal pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; asserts low on fault and holds for 210ms post-recovery |
| 2 - GND | Ground reference | Common return for all internal comparators, reference, and output stage |
| 3 - MR | Active-low manual-reset input | Internal 50kΩ pullup to VCC1; forces reset when pulled low, with 200ns delay and 1µs minimum pulse width |
| 4 - VCC2 | Secondary supply input | Powers internal circuitry when VCC2 > VCC1; monitored for 1.665V threshold violation |
| 5 - VCC1 | Primary supply input | Main power source and reference for RST output; monitored for 3.075V threshold violation |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC1 (3.075V) and VCC2 (1.665V) with separate comparators and hysteresis |
| Push-pull RST output | Eliminates external pullup resistor, reduces BOM count, and ensures fast rise/fall times into µP reset pin |
| Low 14µA supply current | Enables integration into ultra-low-power battery-backed subsystems without compromising runtime |
| Guaranteed reset validity to 0.8V | Ensures deterministic reset assertion during deep undervoltage events common in Li-ion discharge profiles |
| Immunity to short VCC transients | Rejects <100ns glitches via internal filtering - prevents spurious resets in noisy power environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG sensor operating from single-cell Li-ion (2.8–4.2V) with 1.8V MCU core and 3.3V analog front-end. IC Role / Device Role / Timing Role: Supervises both 3.3V analog rail and 1.8V core rail; asserts RST if either drops below threshold during battery sag or cold start. Use Value: Prevents MCU lockup during low-battery brownout by enforcing 210ms reset hold time, ensuring clean restart before firmware execution. | Use Scenario: DIN-rail mounted PLC module with isolated 24V DC input, internal 5V/3.3V/1.8V regulation, and real-time Ethernet interface. IC Role / Device Role / Timing Role: Monitors 5V logic rail (VCC1) and 1.8V FPGA core rail (VCC2); provides fail-safe reset coordination across multiple power domains. Use Value: Guarantees reset remains asserted until both rails stabilize above thresholds - critical for deterministic FPGA configuration recovery. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: BCM powered from vehicle battery (9–16V) with LDOs generating 5V microcontroller supply and 3.3V CAN transceiver supply. IC Role / Device Role / Timing Role: Supervises 5V MCU rail (VCC1) and 3.3V CAN rail (VCC2); uses MR pin for ignition-key triggered reset. Use Value: Push-pull RST drives directly into MCU reset pin without pullup, reducing layout area and improving noise immunity in high-EMI engine bay environment. | Use Scenario: Revenue-grade meter with backup supercapacitor, monitoring main 3.3V rail and 1.2V RTC supply during AC loss. IC Role / Device Role / Timing Role: Detects undervoltage on 3.3V system rail (VCC1) and 1.2V RTC rail (VCC2); initiates orderly data save and sleep transition before power collapse. Use Value: Valid reset down to 0.8V allows full utilization of supercapacitor discharge curve - extends safe shutdown window by >150ms vs. competing supervisors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6718UKTDD3 | Same dual-threshold (3.075V/1.665V) and 210ms timeout, but open-drain RST output requiring external pullup | Suitable where µP reset pin tolerates open-drain drive or where level-shifting is needed | Select MAX6718UKTDD3 only if system requires configurable reset polarity or interfacing to mixed-voltage logic |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only), 200ms timeout, 1.6µA IQ, SOT23-5 package | Lacks VCC2 monitoring - cannot replace dual-rail supervision without adding second IC | Choose TPS3808G33DBVR only for cost-sensitive single-rail applications where secondary rail monitoring is omitted |
Compared with MAX6718UKVDD3, MAX6718UKTDD3 requires an external pullup for RST but offers identical thresholds and timing; TPS3808G33DBVR reduces quiescent current significantly but sacrifices dual-rail capability - making it unsuitable as direct functional replacement in multi-rail systems.
Availability
MAX6718UKVDD3 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6718UKVDD3 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 computing applications.
The MAX6715A–MAX6729A family delivers ultra-low-voltage dual/triple supervisory circuits targeting space-constrained, battery-operated, and high-reliability systems requiring guaranteed reset behavior down to 0.8V supply.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6718UKVDD3?
The MAX6718UKVDD3 has factory-trimmed reset thresholds of 3.075V (VTH1) for VCC1 and 1.665V (VTH2) for VCC2, with ±1.5% tolerance over -40°C to +125°C. These values are encoded in the "VDD" suffix per Maxim's Reset Voltage Threshold Suffix Guide and confirmed in the Electrical Characteristics table of the official datasheet.
Does the MAX6718UKVDD3 support manual reset functionality?
Yes, the MAX6718UKVDD3 includes an active-low manual-reset input (MR) on Pin 3, featuring an internal 50kΩ pullup to VCC1. Pulling MR low forces reset assertion for the full 210ms timeout period, with 200ns propagation delay and 1µs minimum pulse width - enabling pushbutton or logic-controlled system restart without external components.
What is the reset output configuration of the MAX6718UKVDD3?
The MAX6718UKVDD3 provides a push-pull active-low RST output on Pin 1, referenced to VCC1. It sources up to 200µA (VOH ≥ 0.8×VCC1) and sinks up to 3.2mA (VOL ≤ 0.4V), eliminating the need for an external pullup resistor - a key differentiator from open-drain variants like MAX6718UKTDD3.
Can the MAX6718UKVDD3 monitor a third voltage rail?
No, the MAX6718UKVDD3 is a dual-supply supervisor and does not include RSTIN or PFI inputs. It monitors only VCC1 and VCC2. For triple-voltage monitoring, consider MAX6719A/MAX6720A (with RSTIN) or MAX6728A/MAX6729A (with PFI/PFO), which are distinct part numbers in the same family.
What is the supply current consumption of the MAX6718UKVDD3 at 3.6V?
The MAX6718UKVDD3 draws 14µA typical supply current at 3.6V (ICC1), as specified in the Electrical Characteristics table. This value remains stable across temperature (-40°C to +125°C) and is measured with all I/O connections open and outputs not asserted - critical for battery lifetime estimation in portable designs.
MAX6718UKVDD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 788mV, 1.575V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6718UKVDD3 FAQ
1.How can I place an order for MAX6718UKVDD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718UKVDD3 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 MAX6718UKVDD3 reliable?
The price and inventory of MAX6718UKVDD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718UKVDD3 is usually 5 days.
3.What payment methods are accepted for MAX6718UKVDD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718UKVDD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718UKVDD3?
MAX6718UKVDD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718UKVDD3 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 MAX6718UKVDD3?
For technical support, including MAX6718UKVDD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718UKVDD3 requirements.
6.How does Aetrix verify that MAX6718UKVDD3 is sourced from the original manufacturer or authorized distributors?
All MAX6718UKVDD3 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 MAX6718UKVDD3 meets industry standards.
7.What is the process for return or replacement of MAX6718UKVDD3?
All MAX6718UKVDD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718UKVDD3, 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 MAX6718UKVDD3 part is unused and in its original packaging.
Return procedure for MAX6718UKVDD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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