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Analog Devices Inc./Maxim Integrated MAX6718UKSDD3+T
- Part No.:
- MAX6718UKSDD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6718UKSDD3+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,405
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Product details
Overview
MAX6718UKSDD3+T 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 4.625V (VTH1) and 3.075V (VTH2), 210ms minimum reset timeout, push-pull active-low RST output, and manual reset input. It ensures reliable system boot and brownout recovery in low-power embedded controllers.
For engineers reviewing the MAX6718UKSDD3+T datasheet, MAX6718UKSDD3+T pinout, MAX6718UKSDD3+T application, or MAX6718UKSDD3+T equivalent, this page delivers verified electrical parameters, exact pin functions, dual-supply supervision behavior, reset timing integrity down to 0.8V supply, and real-world substitution guidance for industrial and telecom power management designs.
Technical Context
The MAX6718UKSDD3+T implements independent voltage comparators for VCC1 and VCC2, each with ±0.5% hysteresis and 20 ppm/°C tempco, guaranteeing reset assertion when either supply falls below its threshold and maintaining reset for ≥210ms after both recover. Its push-pull RST output drives directly into µP reset pins without external pullup.
It integrates a 50kΩ internal MR pullup, supports manual reset pulse widths ≥1µs, and features glitch immunity against VCC transients ≤20µs at 100mV overdrive. Supply current remains stable at 14µA typical across -40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, falling edge); sets primary supply brownout detection point for 5V or 4.8V systems. |
| VCC2 Threshold | 3.075V (factory-trimmed, falling edge); enables reliable monitoring of 3.3V I/O rails or auxiliary supplies. |
| Reset Timeout | 210ms (minimum); ensures sufficient hold time for full processor initialization and peripheral stabilization. |
| Supply Current | 14µA typical at 3.6V; enables battery-backed operation for >10 years in always-on monitoring applications. |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade deployment in telecom equipment and embedded controllers. |
| Reset Output Type | Push-pull active-low RST; eliminates need for external pullup resistor and provides clean logic-level drive into µP reset pin. |
| Valid Reset Down To | VCC1 or VCC2 ≥ 0.8V; guarantees correct reset state during deep brownout, critical for fail-safe shutdown sequencing. |
Pinout & Package
MAX6718UKSDD3+T uses a 5-pin SOT23-5 package (2.9mm × 1.6mm × 1.1mm), optimized for space-constrained PCB layouts in portable and industrial electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output; asserts low on VCC1/VCC2 undervoltage and holds for 210ms minimum after recovery. |
| 2 | GND | Ground reference for all internal comparators and output drivers; must be connected to system ground plane. |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC1 (50kΩ); initiates reset when pulled low ≥1µs. |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal circuitry when VCC2 > VCC1 and sets VTH2 = 3.075V monitor point. |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers device when VCC1 > VCC2 and sets VTH1 = 4.625V monitor point. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitors | Simultaneous VCC1 (4.625V) and VCC2 (3.075V) supervision with separate comparators avoids single-point failure in multirail systems. |
| Guaranteed reset validity at 0.8V | Ensures deterministic reset behavior during severe brownout-no undefined output states even as supplies collapse. |
| Push-pull RST output | Eliminates external pullup requirement and reduces BOM count; compatible with bidirectional µP reset I/O via 4.7kΩ series resistor. |
| Low 14µA supply current | Enables continuous supervision in energy-sensitive applications such as battery-powered IoT nodes and backup power circuits. |
| Immunity to short VCC transients | Rejects glitches ≤20µs at 100mV overdrive, preventing spurious resets during switching noise or load transients. |
Applications
| Industrial PLC Power Sequencing | Telecom Line Card Supervision |
|---|---|
Use Scenario: Monitoring 5V main rail and 3.3V I/O rail in programmable logic controller backplane modules during cold start and hot-swap events. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset until both rails stabilize above 4.625V and 3.075V, then holding for 210ms before release. Use Value: Prevents firmware lockup due to partial rail ramp-up; eliminates need for discrete RC timers or dual comparator ICs. |
Use Scenario: Ensuring reliable boot of FPGA-based line cards in carrier-grade switches where 5V and 3.3V supplies must meet strict sequencing windows. IC Role / Device Role / Timing Role: Primary supervisory guard detecting undervoltage on either rail and enforcing 210ms minimum reset hold to satisfy FPGA configuration timing. Use Value: Reduces board area by 60% vs. two separate supervisors; maintains reset integrity down to 0.8V during brownout conditions. |
| Embedded Controller Boot Integrity | Portable Medical Device Power Management |
Use Scenario: Securing safe startup of ARM Cortex-M based controllers in factory automation gateways with dual-rail power architecture. IC Role / Device Role / Timing Role: Asserting active-low reset to the MCU until both VCC1 (4.625V) and VCC2 (3.075V) are valid and stable for ≥210ms. Use Value: Guarantees deterministic boot state regardless of supply ramp rate asymmetry; push-pull output interfaces directly to MCU reset pin. |
Use Scenario: Supervising battery-backed 3.3V logic rail and 5V analog subsystem in handheld diagnostic instruments with strict low-power requirements. IC Role / Device Role / Timing Role: Providing ultra-low-current (14µA) dual-rail monitoring with guaranteed reset assertion down to 0.8V supply collapse. Use Value: Extends battery life while ensuring fail-safe shutdown before critical voltage thresholds are breached. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6716UTLTD3-T | Same 4.625V/3.075V thresholds and 210ms timeout, but in 6-pin SOT23-6 with open-drain RST output. | Requires external pullup resistor; less suitable for direct µP reset drive but offers flexibility for wired-OR reset buses. | Select MAX6716UTLTD3-T only if open-drain topology or additional pin for future feature enablement is required. |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); no VCC2 monitoring; 200ms timeout; 1.6µA quiescent current. | Lacks dual-rail capability; cannot replace MAX6718UKSDD3+T in systems requiring simultaneous 5V/3.3V supervision. | Use TPS3808G33DBVR only for cost-sensitive single-rail applications where secondary supply monitoring is unnecessary. |
Compared with MAX6716UTLTD3-T and TPS3808G33DBVR, the MAX6718UKSDD3+T uniquely delivers integrated dual-supply monitoring with push-pull reset in the smallest footprint (5-pin SOT23), eliminating design compromises between board space, BOM count, and supervision coverage.
Availability
MAX6718UKSDD3+T is available at Aetrix Electronics and suitable for industrial PLC power sequencing, telecom line card supervision, and embedded controller boot integrity requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6718UKSDD3+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 management, sensing, and interface applications, serving industrial, automotive, and communications markets.
The MAX6715–MAX6729 family delivers compact, ultra-low-power supervisory solutions for multivoltage systems-specifically engineered to replace discrete reset circuits in space- and power-constrained embedded platforms.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6718UKSDD3+T?
The MAX6718UKSDD3+T has a factory-trimmed VCC1 reset threshold of 4.625V (falling edge), as indicated by the "S" suffix in the part number per Maxim's Reset Voltage Threshold Suffix Guide. This value is guaranteed across -40°C to +85°C with ±0.5% hysteresis and 20 ppm/°C tempco, enabling precise brownout detection for 5V systems.
Does the MAX6718UKSDD3+T support monitoring a third voltage rail?
No, the MAX6718UKSDD3+T is a dual-voltage supervisor and does not include RSTIN or PFI inputs. It monitors only VCC1 and VCC2. For triple-voltage supervision, consider MAX6719UKSDD3+T (with RSTIN) or MAX6728KA33D3+T (with PFI/PFO), both in the same MAX6715–MAX6729 family.
What is the function of Pin 3 (MR) on the MAX6718UKSDD3+T?
Pin 3 is the active-low Manual Reset (MR) input with an internal 50kΩ pullup to VCC1. Pulling MR low for ≥1µs forces an immediate reset assertion on the RST pin, which remains low for the full 210ms timeout period after MR returns high. Leaving MR unconnected defaults to inactive (reset deasserted).
Can the MAX6718UKSDD3+T operate reliably during deep brownout conditions?
Yes-the MAX6718UKSDD3+T guarantees valid reset output logic state as long as either VCC1 or VCC2 remains ≥0.8V. This ensures deterministic reset behavior during severe supply collapse, unlike many supervisors that lose output control below 1.0V, making it ideal for fail-safe shutdown in industrial power systems.
What package type and dimensions does the MAX6718UKSDD3+T use?
The MAX6718UKSDD3+T uses a 5-pin SOT23-5 package measuring 2.9mm × 1.6mm × 1.1mm (typical). Its small footprint and standard lead-free +T suffix comply with IPC/JEDEC J-STD-020 moisture sensitivity level 1, supporting reflow soldering in high-volume manufacturing.
MAX6718UKSDD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6718UKSDD3+T FAQ
1.How can I place an order for MAX6718UKSDD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718UKSDD3+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 MAX6718UKSDD3+T reliable?
The price and inventory of MAX6718UKSDD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718UKSDD3+T is usually 5 days.
3.What payment methods are accepted for MAX6718UKSDD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718UKSDD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718UKSDD3+T?
MAX6718UKSDD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718UKSDD3+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 MAX6718UKSDD3+T?
For technical support, including MAX6718UKSDD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718UKSDD3+T requirements.
6.How does Aetrix verify that MAX6718UKSDD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6718UKSDD3+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 MAX6718UKSDD3+T meets industry standards.
7.What is the process for return or replacement of MAX6718UKSDD3+T?
All MAX6718UKSDD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718UKSDD3+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 MAX6718UKSDD3+T part is unused and in its original packaging.
Return procedure for MAX6718UKSDD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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