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Analog Devices Inc./Maxim Integrated MAX6718AUKSYD3+T
- Part No.:
- MAX6718AUKSYD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718AUKSYD3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,025
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Product details
Overview
MAX6718AUKSYD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with factory-trimmed reset thresholds, 140ms minimum reset timeout, push-pull active-low RST output, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in telecom power sequencing and industrial embedded controllers.
For engineers reviewing the MAX6718AUKSYD3+T datasheet, MAX6718AUKSYD3+T pinout, MAX6718AUKSYD3+T application, or MAX6718AUKSYD3+T equivalent, key selection criteria include dual-rail voltage monitoring capability, 140ms reset timeout, push-pull RST logic, -40°C to +125°C operation, and SOT23-6 footprint compatibility with multivoltage server and networking equipment designs.
Technical Context
The MAX6718AUKSYD3+T implements independent dual-voltage comparators for VCC1 and VCC2, each with factory-trimmed thresholds and 0.5% hysteresis, asserting reset when either supply falls below its threshold and holding reset for a fixed 140ms (min) timeout after recovery. It guarantees correct reset state at VCC ≥ 0.8V, enabling brownout detection in low-power systems.
It features a push-pull RST output referenced to VCC1, internal 50kΩ MR pullup, and immunity to sub-20µs VCC transients. No watchdog, manual-reset, or adjustable RSTIN/PFI functions are present - confirmed by suffix code "YD3" mapping to dual-supply, push-pull RST, 140ms timeout, and no auxiliary inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VCC1: 0.8V–5.5V; VCC2: 0.8V–5.5V - supports brownout detection during deep undervoltage conditions in battery-backed systems. |
| Reset Timeout Period | 140ms (min) - ensures sufficient hold time for full processor initialization before release in server and telecom applications. |
| VCC1 Reset Threshold | 4.625V (typ), ±1.5% - factory-trimmed for precise 4.63V nominal trip point on primary rail, critical for 5V system integrity. |
| VCC2 Reset Threshold | 3.075V (typ), ±1.5% - factory-trimmed for precise 3.08V nominal trip point on secondary rail, matching common 3.3V I/O supply tolerance. |
| Supply Current | 14µA (typ) at 3.6V - enables always-on supervision in low-power portable and IoT edge devices without significant battery drain. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive modules and industrial control cabinets with wide ambient swings. |
| Reset Output Type | Push-pull, active-low RST - eliminates need for external pullup resistor, simplifies PCB layout and reduces BOM count. |
Pinout & Package
SOT23-6 package (package code U6+1), 1.6mm × 2.9mm footprint, 0.95mm height, thermal resistance θJA = 115°C/W (multilayer board).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1 - drives μP reset pin directly without external pullup; sinks 1.2mA at 2.7V. |
| 2 | GND | Ground reference for all internal comparators and output drivers - must be low-impedance connection to minimize noise coupling. |
| 3 | MR | Active-low manual-reset input with internal 50kΩ pullup to VCC1 - debounced via 1µs minimum pulse width; connects to momentary switch to GND. |
| 4 | VCC2 | Secondary supply input powering comparator for VCC2 rail - monitors 0.9V–3.3V supplies independently of VCC1 path. |
| 5 | VCC1 | Primary supply input powering device core and RST driver - sets VCC1 threshold (4.625V typ) and defines RST high-level voltage (≥0.8×VCC1). |
| 6 | NC | No connect - internally unconnected; must remain floating per datasheet to avoid undefined behavior or leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 and VCC2 supervision with separate thresholds prevents false resets during asymmetric rail sequencing. |
| Guaranteed reset validity at 0.8V | Ensures reliable brownout detection even as supplies collapse - critical for orderly shutdown in power-loss scenarios. |
| 140ms fixed reset timeout | Matches typical boot-time requirements of ARM Cortex-M and x86-based controllers without software configuration overhead. |
| Push-pull RST output | Eliminates external pullup resistor, reducing component count and PCB area - especially valuable in space-constrained SOT23-6 designs. |
| Low 14µA supply current | Enables permanent supervision in battery-powered gateways and remote sensors without compromising runtime. |
Applications
| Telecom Power Sequencing | Industrial PLC Controllers |
|---|---|
Use Scenario: Monitoring 5V primary and 3.3V I/O rails in LTE base station power management unit during cold start and hot-swap events. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting synchronized reset until both rails stabilize above 4.625V and 3.075V for ≥140ms. Use Value: Prevents FPGA configuration corruption and DSP lockup caused by premature release of reset during rail ramp-up. |
Use Scenario: Ensuring deterministic startup of modular I/O backplane in factory automation controller exposed to 125°C cabinet temperatures. IC Role / Device Role / Timing Role: High-temp-rated supervisor validating VCC1/VCC2 integrity and holding reset for 140ms across full -40°C to +125°C range. Use Value: Eliminates field failures due to marginal brownout detection at elevated junction temperatures in enclosed enclosures. |
| Server Management Controller | Medical Diagnostic Imaging PSU |
Use Scenario: Supervising 3.3V management rail and 1.8V memory interface rail in BMC firmware during BIOS update and watchdog-triggered recovery. IC Role / Device Role / Timing Role: Dual-threshold supervisor with push-pull RST driving BMC reset pin directly, eliminating pullup resistor and associated parasitic capacitance. Use Value: Reduces reset assertion delay by >100ns versus open-drain alternatives, improving fault recovery timing margin. |
Use Scenario: Monitoring isolated 5V logic and 2.5V analog sensor rails in MRI power supply module requiring fail-safe shutdown on undervoltage. IC Role / Device Role / Timing Role: Low-current (14µA) supervisor enabling continuous supervision during standby mode without depleting backup capacitors. Use Value: Extends hold-up time by 8–12 seconds compared to higher-ICC alternatives, allowing full image save before power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6716AUTYD3+T | Open-drain RST output instead of push-pull; identical thresholds, timeout, and package. | Requires external pullup resistor; suitable where level-shifting or wired-OR reset bus is needed. | Select when interfacing to bidirectional μP reset pins or sharing reset line across multiple supervisors. |
| TPS3808G33DBVR | Single-supply (3.3V only), 200ms timeout, 3% threshold accuracy vs. MAX6718AUKSYD3+T's 1.5% and dual-rail capability. | Lacks VCC2 monitoring; not suitable for systems with independent 5V/3.3V rail sequencing. | Choose only for cost-sensitive single-rail applications where 3.3V-only supervision suffices and tighter threshold tolerance is unnecessary. |
Compared with MAX6716AUTYD3+T, the MAX6718AUKSYD3+T eliminates external pullup components and improves noise immunity; versus TPS3808G33DBVR, it provides true dual-rail monitoring with superior threshold accuracy and broader voltage coverage - essential for multivoltage server and telecom platforms.
Availability
MAX6718AUKSYD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical imaging equipment requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6718AUKSYD3+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 demanding industrial, automotive, and communications applications.
The MAX6715A–MAX6729A family delivers ultra-low-voltage dual/triple supervisory circuits optimized for multirail power integrity in space-constrained, high-reliability embedded systems.
FAQ
What is the exact reset timeout period of the MAX6718AUKSYD3+T?
The MAX6718AUKSYD3+T has a guaranteed minimum reset timeout period of 140ms, with typical value 210ms and maximum 280ms. This fixed duration is factory-trimmed and does not require external components or configuration - ensuring consistent reset hold time across all units and operating conditions for reliable processor initialization.
Does the MAX6718AUKSYD3+T support monitoring a third voltage rail?
No, the MAX6718AUKSYD3+T does not support third-rail monitoring. Its suffix "YD3" confirms dual-supply supervision only, with no RSTIN, PFI, or WDI functionality. For triple-voltage monitoring, consider MAX6719AUKSYD3+T (RSTIN-enabled variant) or MAX6728AUKSYD3+T (PFI-enabled variant) - both in same SOT23-6 package.
What are the factory-trimmed reset thresholds for VCC1 and VCC2 on the MAX6718AUKSYD3+T?
The MAX6718AUKSYD3+T uses suffix "Y" for VCC1 (4.625V typical, 4.500V–4.750V min/max) and "D" for VCC2 (3.075V typical, 3.000V–3.150V min/max). These thresholds are laser-trimmed during production and specified over -40°C to +125°C, providing tighter tolerance than resistor-divider solutions.
Is the MAX6718AUKSYD3+T compatible with 1.8V logic systems?
Yes - the MAX6718AUKSYD3+T guarantees valid reset operation with VCC1 or VCC2 as low as 0.8V, and its VCC2 input accepts 0.9V–3.3V supplies. When VCC2 = 1.8V, the device correctly monitors that rail against its 3.075V threshold using internal reference scaling, making it suitable for mixed-voltage SoC interfaces.
What is the function of Pin 6 (NC) on the MAX6718AUKSYD3+T?
Pin 6 is a no-connect (NC) terminal - internally unconnected and electrically isolated. It must remain floating (unbonded and unconnected on PCB) per Maxim's datasheet guidance. Connecting Pin 6 to any net may cause undefined behavior, increased leakage, or reduced ESD robustness due to internal routing constraints.
MAX6718AUKSYD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.188V, 2.925V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6718AUKSYD3+T FAQ
1.How can I place an order for MAX6718AUKSYD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718AUKSYD3+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 MAX6718AUKSYD3+T reliable?
The price and inventory of MAX6718AUKSYD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718AUKSYD3+T is usually 5 days.
3.What payment methods are accepted for MAX6718AUKSYD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718AUKSYD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718AUKSYD3+T?
MAX6718AUKSYD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718AUKSYD3+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 MAX6718AUKSYD3+T?
For technical support, including MAX6718AUKSYD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718AUKSYD3+T requirements.
6.How does Aetrix verify that MAX6718AUKSYD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6718AUKSYD3+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 MAX6718AUKSYD3+T meets industry standards.
7.What is the process for return or replacement of MAX6718AUKSYD3+T?
All MAX6718AUKSYD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718AUKSYD3+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 MAX6718AUKSYD3+T part is unused and in its original packaging.
Return procedure for MAX6718AUKSYD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6718AUKSYD3+T Tags
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MIC826SYMT-TR
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