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Analog Devices Inc./Maxim Integrated MAX6718UKSVD3
- Part No.:
- MAX6718UKSVD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6718UKSVD3.pdf
- Description:
- IC SUPERVISOR UP SUP CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:2,297
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Product details
Overview
MAX6718UKSVD3 from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, monitoring VCC1 (primary supply) and VCC2 (secondary supply) with factory-trimmed reset thresholds of 3.075V (VTH1) and 2.925V (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-operated equipment for reliable power-up sequencing and brownout protection.
For engineers reviewing the MAX6718UKSVD3 datasheet, MAX6718UKSVD3 pinout, MAX6718UKSVD3 application, or MAX6718UKSVD3 equivalent, key selection criteria include dual-supply threshold accuracy, 210ms reset timeout stability over -40°C to +125°C, push-pull RST drive capability referenced to VCC1, low 14µA typical supply current at 3.6V, and immunity to sub-20µs VCC transients.
Technical Context
The MAX6718UKSVD3 integrates two independent voltage comparators with hysteresis (0.5% typical) and a precision internal timer for reset assertion and hold. It uses separate VCC1 and VCC2 inputs to power its logic and reference circuits, enabling valid reset generation even when one supply drops to 0.8V while the other remains active.
Its push-pull RST output is referenced to VCC1 and drives low during fault conditions (VCC1/VCC2 below thresholds, MR asserted, or watchdog timeout), maintaining low state for ≥210ms after recovery. No external pullup is required, distinguishing it from open-drain variants in the same family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V (typ), factory-trimmed - ensures reliable reset assertion for 3.3V I/O supply monitoring |
| VCC2 Threshold | 2.925V (typ), factory-trimmed - matches common 3.0V core or analog supply rails |
| Reset Timeout | 210ms (min) - provides sufficient hold time for slow-starting DC-DC converters and firmware initialization |
| Supply Current | 14µA (typ) at 3.6V - enables ultra-low-power operation in battery-backed systems |
| Operating Temp | -40°C to +125°C - supports industrial and automotive under-hood applications |
| Reset Valid Down To | VCC1 or VCC2 ≥ 0.8V - guarantees deterministic reset behavior during deep brownout |
| VCC Transient Immunity | Immune to <20µs negative glitches - prevents spurious resets from switching noise |
Pinout & Package
Package: 5-pin SOT23 (surface-mount, 2.9mm × 1.6mm × 1.1mm height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; asserts low on fault and holds ≥210ms after recovery - no external pullup needed |
| 2 - GND | Ground reference | Common return for all internal comparators, timer, and output stage |
| 3 - MR | Active-low manual-reset input | Internal 50kΩ pullup to VCC1; logic-low pulse ≥1µs forces reset - supports momentary switch interface without debounce |
| 4 - VCC2 | Secondary supply input | Powers secondary comparator and sets VCC2 threshold reference; must be ≥0.8V for valid reset operation |
| 5 - VCC1 | Primary supply input | Powers main logic, timer, and RST output stage; defines RST high-level voltage (≥0.8×VCC1) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply monitoring | Simultaneous VCC1 (3.075V) and VCC2 (2.925V) threshold detection with separate comparators and hysteresis |
| Push-pull RST output | Eliminates need for external pullup resistor and reduces BOM count in space-constrained PCB layouts |
| Guaranteed reset validity at 0.8V | Enables robust system recovery during partial power loss - critical for fail-safe embedded control |
| Low quiescent current | 14µA typical at 3.6V allows integration into always-on subsystems without compromising battery life |
| High-temperature operation | Full functionality across -40°C to +125°C supports deployment in harsh industrial and automotive environments |
Applications
| Portable Medical Devices | Industrial PLC Modules |
|---|---|
Use Scenario: Battery-powered handheld diagnostic instrument with dual-rail power (3.3V I/O, 3.0V sensor core) requiring fail-safe boot and brownout recovery. IC Role / Device Role / Timing Role: MAX6718UKSVD3 monitors both rails and asserts push-pull RST to halt MCU until both supplies stabilize post-battery insertion or low-voltage event. Use Value: Prevents corrupted memory writes and erratic peripheral behavior during marginal power conditions - validated over full temperature range. | Use Scenario: DIN-rail mounted programmable logic controller with isolated 24V-to-3.3V/3.0V DC-DC conversion and extended operating temperature requirements. IC Role / Device Role / Timing Role: MAX6718UKSVD3 provides deterministic reset timing (210ms min) synchronized to DC-DC startup delay, ensuring firmware loads only after stable rail establishment. Use Value: Eliminates need for external RC timing network and improves long-term reliability vs. discrete solutions. |
| Automotive Infotainment Head Units | Network Edge Routers |
Use Scenario: 12V-powered infotainment system with buck-converted 3.3V main logic and 3.0V audio codec supply exposed to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: MAX6718UKSVD3 detects simultaneous drop on both rails and asserts RST within 20µs, holding reset for 210ms to allow power supply recovery before MCU restart. Use Value: Immunity to sub-20µs VCC glitches prevents false resets during alternator switching noise - confirmed per datasheet transient immunity curve. | Use Scenario: Fanless enterprise router with dual 3.3V/3.0V power domains and requirement for zero-maintenance field operation over 10-year lifecycle. IC Role / Device Role / Timing Role: MAX6718UKSVD3 serves as primary power supervisor, interfacing directly to ARM-based SoC reset pin via push-pull RST with no series resistor. Use Value: Reduces component count and layout area vs. open-drain alternatives - verified compatible with bidirectional SoC reset I/O using 4.7kΩ isolation resistor per application note. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6718UKSVD5 | Same package and pinout; 560ms (min) reset timeout instead of 210ms | Suitable for systems with slower power supplies or longer firmware initialization sequences | Select when extended reset hold time is required without changing PCB layout |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); open-drain RST; 200ms timeout; 1.5µA IQ | Lacks VCC2 monitoring and push-pull drive - requires external pullup and cannot replace dual-rail supervision | Use only for single-rail applications where ultra-low IQ outweighs dual-monitoring capability |
Compared with MAX6718UKSVD5 and TPS3808G33DBVR, the MAX6718UKSVD3 uniquely delivers dual-rail supervision with push-pull RST and 210ms timeout in a 5-pin SOT23 - enabling compact, low-component-count designs for portable and industrial systems requiring coordinated reset of multiple voltage domains.
Availability
MAX6718UKSVD3 is available at Aetrix Electronics and suitable for portable medical devices, industrial PLC modules, automotive infotainment head units, and network edge routers requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for MAX6718UKSVD3 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 MAX6715A–MAX6729A family was engineered specifically for ultra-low-voltage dual/triple-supply monitoring in space-constrained, battery-sensitive systems - emphasizing guaranteed reset validity at sub-1V supplies and minimal quiescent current.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6718UKSVD3?
The MAX6718UKSVD3 has a factory-trimmed VCC1 reset threshold of 3.075V (typical), with tolerance of ±1.5% (3.000V to 3.150V) over temperature. This value is fixed by the "S" suffix in the part number and applies to the primary supply monitoring channel - confirmed in the Reset Voltage Threshold Suffix Guide and Electrical Characteristics table.
Does the MAX6718UKSVD3 support monitoring a third voltage rail?
No, the MAX6718UKSVD3 does not support a third voltage rail. It is a dual-supply supervisor with dedicated VCC1 and VCC2 inputs only. The RSTIN pin is not present on this variant (5-pin SOT23 package), unlike 6- or 8-pin versions such as MAX6719A or MAX6723A - confirmed by pin configuration tables and device selector guide.
Is the RST output of the MAX6718UKSVD3 push-pull or open-drain?
The RST output of the MAX6718UKSVD3 is push-pull, as indicated by the "U" in the package code (UK = 5-pin SOT23, U = push-pull). It actively drives high (≥0.8×VCC1) and low (≤0.4V at 3.2mA sink) without requiring an external pullup resistor - verified in Pin Description and RESET OUTPUTS section of the datasheet.
What is the minimum reset timeout period for the MAX6718UKSVD3?
The MAX6718UKSVD3 has a minimum reset timeout period of 210ms, denoted by the "D3" suffix. This is the guaranteed minimum duration RST remains asserted after all monitored supplies recover - measured from the moment VCC1 and VCC2 exceed their respective thresholds, and confirmed across -40°C to +125°C.
Can the MAX6718UKSVD3 operate with VCC1 = 1.8V and VCC2 = 1.2V?
Yes, the MAX6718UKSVD3 operates with VCC1 = 1.8V and VCC2 = 1.2V. Its absolute minimum valid supply is 0.8V per rail, and electrical characteristics (including reset threshold accuracy and supply current) are specified down to these levels. However, VTH1/VTH2 thresholds remain fixed at 3.075V/2.925V - so these rails must be ≥3.075V and ≥2.925V respectively for reset assertion to function as intended.
MAX6718UKSVD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6718UKSVD3 FAQ
1.How can I place an order for MAX6718UKSVD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718UKSVD3 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 MAX6718UKSVD3 reliable?
The price and inventory of MAX6718UKSVD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718UKSVD3 is usually 5 days.
3.What payment methods are accepted for MAX6718UKSVD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718UKSVD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718UKSVD3?
MAX6718UKSVD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718UKSVD3 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 MAX6718UKSVD3?
For technical support, including MAX6718UKSVD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718UKSVD3 requirements.
6.How does Aetrix verify that MAX6718UKSVD3 is sourced from the original manufacturer or authorized distributors?
All MAX6718UKSVD3 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 MAX6718UKSVD3 meets industry standards.
7.What is the process for return or replacement of MAX6718UKSVD3?
All MAX6718UKSVD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718UKSVD3, 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 MAX6718UKSVD3 part is unused and in its original packaging.
Return procedure for MAX6718UKSVD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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