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Analog Devices Inc./Maxim Integrated MAX6718UKSYD3+T
- Part No.:
- MAX6718UKSYD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6718UKSYD3+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,231
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Product details
Overview
MAX6718UKSYD3+T from Maxim Integrated is a dual-voltage microprocessor supervisory IC in 5-pin SOT23 package, monitoring VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with factory-trimmed reset thresholds (VTH1 = 2.125V, VTH2 = 2.125V), 210ms minimum reset timeout, push-pull active-low RST output, and manual reset input - used for reliable power-on reset and brownout detection in battery-powered embedded systems.
For engineers reviewing the MAX6718UKSYD3+T datasheet, MAX6718UKSYD3+T pinout, MAX6718UKSYD3+T application, or MAX6718UKSYD3+T equivalent, this page delivers verified specifications, exact pin functions, dual-supply monitoring context, reset timing behavior, and validated alternative parts for industrial and portable equipment design.
Technical Context
The MAX6718UKSYD3+T implements dual independent voltage comparators with internal 2.125V thresholds for both VCC1 and VCC2, guaranteeing valid reset assertion down to VCC ≥ 0.8V. It uses a digital timeout counter to hold RST low for ≥210ms after all monitored supplies recover.
This variant includes a push-pull active-low reset output referenced to VCC1 and an internal 50kΩ pullup on the MR input - no external components required for manual reset functionality. It lacks watchdog, RSTIN, PFI/PFO, and secondary RST2 outputs per Selector Guide and Pin Description tables.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.125V (typ), factory-trimmed - ensures reliable reset assertion when primary supply drops below nominal 2.15V rail |
| VCC2 Threshold | 2.125V (typ), factory-trimmed - matches core logic supply in dual-rail 2.1V/2.1V systems |
| Reset Timeout | 210ms (min) - provides sufficient hold time for slow-start DC/DC converters and FPGA configuration |
| Supply Current | 14µA (typ) at 3.6V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Temp | -40°C to +85°C - qualified for industrial ambient environments without derating |
| Reset Output | Push-pull, active-low, referenced to VCC1 - drives TTL/CMOS loads directly without pullup resistor |
| MR Input | Internal 50kΩ pullup to VCC1 - supports momentary switch-to-GND interface with no external components |
Pinout & Package
Package: 5-pin SOT23-5, surface-mount, 2.9mm × 1.6mm footprint, 1.1mm height - compatible with standard reflow profiles and high-density PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; sinks ≥1.2mA at VCC1 ≥ 2.7V |
| 2 | GND | Analog/digital ground reference - must be connected to system ground plane for noise immunity |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC1; 1µs minimum pulse width |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V); powers internal comparator for VCC2 monitoring path |
| 5 | VCC1 | Primary supply input (1.8V–5.0V); powers device core and references RST output and MR pullup |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 and VCC2 supervision with separate comparators - eliminates need for two discrete supervisors |
| Guaranteed reset validity down to 0.8V | Ensures deterministic reset state even during deep brownout - critical for flash write integrity |
| Immunity to short VCC transients | Rejects <20µs negative glitches below threshold - prevents spurious resets in noisy power environments |
| Low quiescent current | 14µA typical at 3.6V - extends battery life in always-on sensor nodes and wearables |
| No external components for MR | Integrated 50kΩ pullup eliminates BOM count and layout area for manual reset switch interface |
Applications
| Industrial PLC I/O Modules | Portable Medical Monitors |
|---|---|
Use Scenario: Power sequencing and fault detection in DIN-rail mounted controllers with dual 3.3V/2.1V rails. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset until both VCC1 (3.3V I/O) and VCC2 (2.1V analog front-end) stabilize above 2.125V. Use Value: Prevents firmware execution before ADC reference and digital logic are fully powered - avoids corrupted sensor readings. |
Use Scenario: Battery-backed ECG data logger requiring reliable startup after coin-cell replacement. IC Role / Device Role / Timing Role: Monitors main 3.3V LDO and backup 2.1V supercap rail; holds µP in reset until both exceed 2.125V and timeout completes. Use Value: Eliminates risk of partial memory writes during low-battery power-up - ensures data log consistency. |
| Point-of-Sale Terminals | Smart Energy Meters |
Use Scenario: Cold-start reliability in handheld payment devices with Li-ion battery and dual DC/DC outputs. IC Role / Device Role / Timing Role: Supervises 3.3V processor rail and 1.8V secure element rail; asserts push-pull RST to ARM Cortex-M reset pin. Use Value: Push-pull output drives reset line directly - removes need for external pullup and saves board space. |
Use Scenario: Tamper-resistant meter with isolated MCU and metrology ASIC powered from separate regulators. IC Role / Device Role / Timing Role: Ensures synchronized reset across 3.3V communication and 2.1V measurement subsystems after AC loss recovery. Use Value: 210ms timeout accommodates slow-recovering isolated flyback supplies - guarantees full initialization before metering starts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6718UKSAD3+T | VTH1 = 2.125V, VTH2 = 1.575V - asymmetric thresholds for 3.3V/1.6V systems | Suitable for mixed-signal SoCs with higher primary and lower secondary rails | Select when VCC2 is ≤1.6V and requires tighter threshold match than 2.125V |
| TPS3808G18DBVR | Single-supply monitor (1.8V threshold), open-drain RST, 200ms timeout, 2.5µA IQ | Lacks dual-monitoring capability - requires second IC for VCC2 supervision | Choose only if system has single regulated rail and ultra-low IQ (<3µA) is mandatory |
Compared with MAX6718UKSYD3+T, the MAX6718UKSAD3+T offers matched VCC1/VCC2 thresholds for symmetric dual-rail designs, while TPS3808G18DBVR reduces current draw but forces redesign to accommodate single-supply limitation and open-drain output.
Availability
MAX6718UKSYD3+T is available at Aetrix Electronics and suitable for industrial PLCs, portable medical monitors, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6718UKSYD3+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 connectivity in demanding industrial and automotive applications.
The MAX6715–MAX6729 family delivers ultra-low-voltage dual/triple supervisory circuits optimized for multirail embedded systems where space, power, and reset reliability are critical - targeting portable, battery-operated, and industrial control equipment.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6718UKSYD3+T?
The MAX6718UKSYD3+T has factory-trimmed reset thresholds of 2.125V (typ) for both VCC1 and VCC2, as indicated by the 'Y' suffix in the Reset Voltage Threshold Suffix Guide. This symmetric dual-threshold configuration supports systems with matched 2.1V supply rails, and the ±37.5mV tolerance ensures robust operation across temperature and process variation.
Does the MAX6718UKSYD3+T include a watchdog timer or power-fail functionality?
No, the MAX6718UKSYD3+T does not include watchdog timer, RSTIN, PFI, or PFO functionality. Per the Selector Guide and Pin Description, it is a dual-supply-only variant with push-pull RST and MR inputs - features like watchdog (MAX6721–MAX6729) or power-fail (MAX6728/MAX6729) require different part numbers in the same family.
What is the function of Pin 1 (RST) on the MAX6718UKSYD3+T, and what drive strength does it provide?
Pin 1 of the MAX6718UKSYD3+T is the active-low push-pull reset output, referenced to VCC1. It sources ≥0.8×VCC1 at 200µA and sinks ≥1.2mA at VCC1 ≥ 2.7V, enabling direct connection to µP reset pins without external pullup resistors - simplifying layout and reducing component count.
How does the manual reset (MR) input behave on the MAX6718UKSYD3+T, and is an external pullup required?
The MR input on the MAX6718UKSYD3+T has an internal 50kΩ pullup resistor to VCC1, so no external pullup is needed. A logic-low pulse ≥1µs on MR forces RST low for the full 210ms timeout period, making it ideal for momentary switch interfaces - debouncing is unnecessary due to built-in 100ns glitch rejection.
What package type and dimensions does the MAX6718UKSYD3+T use, and is it RoHS-compliant?
The MAX6718UKSYD3+T uses a 5-pin SOT23-5 package measuring 2.9mm × 1.6mm × 1.1mm, with lead-free (Pb-free) construction confirmed by the '+T' suffix. It meets RoHS Directive 2011/65/EU and is compatible with standard SnPb and lead-free reflow profiles per JEDEC J-STD-020.
MAX6718UKSYD3+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:
- -
MAX6718UKSYD3+T FAQ
1.How can I place an order for MAX6718UKSYD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718UKSYD3+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 MAX6718UKSYD3+T reliable?
The price and inventory of MAX6718UKSYD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718UKSYD3+T is usually 5 days.
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Once your MAX6718UKSYD3+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 MAX6718UKSYD3+T?
For technical support, including MAX6718UKSYD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718UKSYD3+T requirements.
6.How does Aetrix verify that MAX6718UKSYD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6718UKSYD3+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 MAX6718UKSYD3+T meets industry standards.
7.What is the process for return or replacement of MAX6718UKSYD3+T?
All MAX6718UKSYD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718UKSYD3+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 MAX6718UKSYD3+T part is unused and in its original packaging.
Return procedure for MAX6718UKSYD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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