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Analog Devices Inc./Maxim Integrated MAX6718UKVDD3+T
- Part No.:
- MAX6718UKVDD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6718UKVDD3+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,807
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Product details
Overview
MAX6718UKVDD3+T from Maxim Integrated is a dual-voltage microprocessor supervisory IC in 5-pin SOT23 package, monitoring VCC1 (primary) and VCC2 (secondary) supply rails 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 MAX6718UKVDD3+T datasheet, MAX6718UKVDD3+T pinout, MAX6718UKVDD3+T application, or MAX6718UKVDD3+T equivalent, key selection criteria include dual-rail voltage monitoring accuracy (±1.5% VTH tolerance), guaranteed reset validity down to VCC = 0.8V, ultra-low 14µA typical supply current at 3.6V, and compatibility with manual reset and push-pull reset signaling in space-constrained designs.
Technical Context
The MAX6718UKVDD3+T implements two independent voltage comparators with internal 20ppm/°C tempco references, each feeding a shared reset timeout timer with fixed 210ms (min) delay. Its push-pull RST output is referenced to VCC1 and sinks up to 3.2mA at 4.5V while maintaining VOL ≤ 0.4V.
It features an internal 50kΩ pullup on MR, accepts TTL/CMOS-compatible logic levels, and guarantees correct reset assertion state when either VCC1 or VCC2 remains ≥ 0.8V - enabling robust operation during deep brownout conditions without external support circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (typ), ±1.5% over -40°C to +85°C - sets precise power-good detection for 5V or 4.8V primary rails |
| VCC2 Reset Threshold | 3.075V (typ), ±1.5% - enables accurate monitoring of 3.3V secondary supplies with minimal headroom margin |
| Reset Timeout Period | 210ms (min) - ensures µP reset pulse exceeds minimum processor reset hold time requirements |
| Supply Current | 14µA (typ) at 3.6V - supports battery-backed or energy-harvesting systems with multi-year standby life |
| Operating Temperature | -40°C to +85°C - qualified for industrial and telecom equipment operating in uncontrolled environments |
| Reset Output Type | Push-pull active-low RST - eliminates need for external pullup resistor and drives directly into µP reset pin |
| MR Input Logic | TTL/CMOS-compatible with 50kΩ internal pullup - simplifies manual reset switch interface with no external components |
Pinout & Package
MAX6718UKVDD3+T is housed in a 5-pin SOT23-5 package (2.9mm × 1.6mm × 1.1mm), surface-mount, RoHS-compliant, lead-free (+T suffix). Pin 1 is marked with dot; pin order is standard SOT23 orientation (pin 1 top-left, pin 5 bottom-right).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts low on VCC1/VCC2 undervoltage or MR activation |
| 2 | GND | Analog/digital ground reference for all internal comparators, timers, and output drivers |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC1; resets system when pulled low |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets VTH2 threshold |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers device core, sets VTH1 threshold, and references RST output |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 and VCC2 supervision with separate factory-trimmed thresholds avoids cascaded failure modes |
| Guaranteed reset validity down to 0.8V | Ensures deterministic reset behavior during severe brownout - no external biasing or auxiliary supply needed |
| Push-pull RST output | Eliminates external pullup resistor, reduces BOM count, and provides stronger drive than open-drain alternatives |
| Immunity to short VCC transients | Withstands ≤20µs negative glitches below threshold (per 100mV overdrive), preventing spurious resets in noisy environments |
| Ultra-low quiescent current | 14µA typical at 3.6V enables use in always-on subsystems without compromising battery lifetime |
Applications
| Industrial PLC Controller | Network Router Power Management |
|---|---|
Use Scenario: Monitors 5V main rail and 3.3V I/O rail in DIN-rail mounted programmable logic controller exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting reset if either rail drops below specification during AC line sag or hot-swap events. Use Value: Prevents firmware corruption by guaranteeing µP reset pulse ≥210ms while operating reliably down to VCC = 0.8V during brownout recovery. |
Use Scenario: Ensures clean boot sequence in multi-rail 12V/5V/3.3V/1.8V network router with redundant power inputs. IC Role / Device Role / Timing Role: Primary supervisor for critical 5V and 3.3V rails; coordinates reset timing across CPU, PHY, and memory subsystems. Use Value: Push-pull RST output directly drives ARM Cortex-A series reset pin without level-shifting or pullup, reducing layout complexity. |
| Medical Diagnostic Handheld | Smart Energy Meter |
Use Scenario: Powers clinical-grade handheld ultrasound device with Li-ion battery and buck-boost DC/DC converters generating 4.6V and 3.1V rails. IC Role / Device Role / Timing Role: Validates stable power before enabling FPGA configuration and sensor acquisition circuitry. Use Value: 14µA supply current extends battery runtime between charges; 4.625V/3.075V thresholds match exact converter output tolerances. |
Use Scenario: Supervises isolated 3.3V microcontroller rail and 5V RS-485 transceiver rail in ANSI C12.20-certified electricity meter. IC Role / Device Role / Timing Role: Dual-supply monitor ensuring secure boot and fault-safe shutdown during grid voltage fluctuations. Use Value: Guaranteed reset assertion at VCC ≥ 0.8V prevents undefined µP state during rapid AC dropout and restoration cycles. |
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 6-pin SOT23-6 with open-drain RST output | Requires external pullup resistor; less suitable for direct µP reset pin drive without additional components | Select MAX6716UTLTD3-T only if board layout accommodates extra pullup or system requires open-drain flexibility |
| TPS3808G33DBVR | 3.3V fixed VDD threshold, 200ms timeout, push-pull RST, but monitors only single supply (no VCC2 input) | Lacks secondary rail monitoring - cannot replace MAX6718UKVDD3+T in dual-rail systems without redesign | Choose TPS3808G33DBVR only for cost-sensitive single-rail applications where VCC2 supervision is unnecessary |
Compared with MAX6716UTLTD3-T and TPS3808G33DBVR, the MAX6718UKVDD3+T uniquely delivers dual-rail monitoring with push-pull RST in the smallest 5-pin footprint, eliminating both external pullups and secondary-supply oversight compromises.
Availability
MAX6718UKVDD3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, network router power management, medical diagnostic handhelds, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6718UKVDD3+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX6715–MAX6729 family was designed specifically for multivoltage embedded systems needing compact, ultra-low-power supervisory functions with guaranteed operation down to 0.8V supply.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6718UKVDD3+T?
The MAX6718UKVDD3+T has factory-trimmed reset thresholds of 4.625V (VTH1) for VCC1 and 3.075V (VTH2) for VCC2, with ±1.5% tolerance over -40°C to +85°C. These values are encoded in the "VD" suffix per Maxim's Reset Voltage Threshold Suffix Guide and confirmed in the Electrical Characteristics table of the official datasheet.
Does the MAX6718UKVDD3+T support manual reset functionality, and how is it implemented?
Yes, the MAX6718UKVDD3+T includes an active-low manual reset input (MR) on pin 3, featuring an internal 50kΩ pullup resistor to VCC1. Pulling MR low forces an immediate reset assertion, which remains active for the full 210ms timeout period after MR returns high - enabling reliable operator-initiated recovery without external components.
What package type and pin count does the MAX6718UKVDD3+T use?
The MAX6718UKVDD3+T uses a 5-pin SOT23-5 surface-mount package (2.9mm × 1.6mm × 1.1mm), with pin 1 marked by a dot. This compact footprint supports high-density PCB layouts in space-constrained applications such as portable medical devices and smart meters.
Is the reset output of the MAX6718UKVDD3+T push-pull or open-drain, and what are its drive capabilities?
The MAX6718UKVDD3+T features a push-pull active-low RST output on pin 1, referenced to VCC1. It can sink up to 3.2mA at 4.5V while maintaining VOL ≤ 0.4V, allowing direct connection to most µP reset pins without external pullup resistors or level shifters.
What is the minimum supply voltage at which the MAX6718UKVDD3+T guarantees valid reset output behavior?
The MAX6718UKVDD3+T guarantees correct reset output logic state when either VCC1 or VCC2 remains ≥ 0.8V - a critical feature for brownout resilience. This specification is explicitly guaranteed in the Absolute Maximum Ratings and Detailed Description sections of the datasheet.
MAX6718UKVDD3+T 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:
- -
MAX6718UKVDD3+T FAQ
1.How can I place an order for MAX6718UKVDD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718UKVDD3+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 MAX6718UKVDD3+T reliable?
The price and inventory of MAX6718UKVDD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718UKVDD3+T is usually 5 days.
3.What payment methods are accepted for MAX6718UKVDD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718UKVDD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718UKVDD3+T?
MAX6718UKVDD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718UKVDD3+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 MAX6718UKVDD3+T?
For technical support, including MAX6718UKVDD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718UKVDD3+T requirements.
6.How does Aetrix verify that MAX6718UKVDD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6718UKVDD3+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 MAX6718UKVDD3+T meets industry standards.
7.What is the process for return or replacement of MAX6718UKVDD3+T?
All MAX6718UKVDD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718UKVDD3+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 MAX6718UKVDD3+T part is unused and in its original packaging.
Return procedure for MAX6718UKVDD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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