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Analog Devices Inc./Maxim Integrated MAX6718UKYDD3
- Part No.:
- MAX6718UKYDD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718UKYDD3.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,740
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Product details
Overview
The MAX6718UKYDD3 from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, monitoring primary (VCC1) and secondary (VCC2) supplies with factory-trimmed reset thresholds of 4.625V (VTH1) and 3.075V (VTH2), 210ms minimum reset timeout, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in telecom power sequencing and industrial embedded controllers.
For engineers reviewing the MAX6718UKYDD3 datasheet, MAX6718UKYDD3 pinout, MAX6718UKYDD3 application, or MAX6718UKYDD3 equivalent, key selection criteria include dual-supply threshold accuracy, 210ms reset hold time, push-pull active-low RST output, manual-reset input support, and operation across –40°C to +125°C for harsh-environment reliability validation.
Technical Context
This device implements two independent voltage comparators with hysteresis (0.5% typical) and a digital timeout counter, asserting RST when either VCC1 falls below 4.625V or VCC2 drops below 3.075V. It guarantees correct reset logic state at supply voltages as low as 0.8V, enabling brownout detection during deep power-down transitions.
The MAX6718UKYDD3 features a push-pull RST output referenced to VCC1, internal 50kΩ MR pullup, and no watchdog or RSTIN/PFI functionality - distinguishing it from triple-monitor or watchdog-enabled variants in the MAX6715A–MAX6729A family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±125mV tolerance) - sets precise brownout point for main system rail |
| VCC2 Threshold | 3.075V (factory-trimmed, ±75mV tolerance) - monitors I/O or auxiliary supply with tight margin |
| Reset Timeout | 210ms (minimum) - ensures µP completes boot sequence before releasing reset |
| Supply Current | 14µA typical at 3.6V - enables battery-backed or ultra-low-power standby operation |
| Operating Temp | –40°C to +125°C - supports automotive under-hood and industrial control environments |
| Reset Output Type | Push-pull active-low RST - eliminates need for external pullup, drives directly into µP reset pin |
| MR Input | Active-low with 50kΩ internal pullup to VCC1 - simplifies manual reset switch interface without external components |
Pinout & Package
Package: 5-pin SOT23 (1.6mm × 2.9mm × 1.1mm, JEDEC MO-178AA), surface-mount, RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Push-pull active-low reset output referenced to VCC1; asserts low on VCC1/VCC2 undervoltage or MR activation |
| 2 | GND | System ground reference for all internal comparators and logic |
| 3 | MR | Active-low manual-reset input with internal 50kΩ pullup to VCC1; debounced by 100ns glitch rejection |
| 4 | VCC2 | Secondary supply input powering VCC2 comparator and related logic; valid down to 0.8V |
| 5 | VCC1 | Primary supply input powering core logic, RST driver, and VCC1 comparator; valid down to 0.8V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (4.625V) and VCC2 (3.075V) supervision with separate thresholds and hysteresis |
| Guaranteed reset validity at low VCC | Outputs remain functional and correctly asserted even when VCC1 or VCC2 drops to 0.8V |
| Immunity to short VCC transients | Rejects glitches ≤20µs duration at 100mV overdrive - prevents spurious resets during switching noise |
| Low quiescent current | 14µA typical ICC1 at 3.6V - extends battery life in portable equipment and backup systems |
| Integrated MR pullup | 50kΩ internal resistor eliminates external component for momentary switch interface |
Applications
| Telecom Power Sequencing | Industrial PLC Controller |
|---|---|
Use Scenario: Sequencing startup of FPGA, DSP, and analog front-end rails in base station power modules. IC Role / Device Role / Timing Role: Dual-supply monitor ensuring VCC1 (5V analog) powers up before VCC2 (3.3V digital) and holds reset until both stabilize. Use Value: Prevents configuration corruption by enforcing strict 210ms post-stabilization reset release window. | Use Scenario: Monitoring redundant 24V DC input and isolated 5V logic supply in programmable logic controller backplane. IC Role / Device Role / Timing Role: Supervisory guard detecting brownout on either rail and asserting hardware reset to halt unsafe I/O states. Use Value: Enables deterministic fail-safe shutdown with 0.8V reset validity margin during gradual DC bus decay. |
| Medical Diagnostic Equipment | Automotive Infotainment Head Unit |
Use Scenario: Validating stable 3.3V imaging sensor supply and 1.8V FPGA core supply before initiating image acquisition. IC Role / Device Role / Timing Role: Dual-threshold supervisor triggering reset if either supply deviates beyond ±3.5% of nominal during critical acquisition phase. Use Value: Eliminates false triggers via 0.5% comparator hysteresis and 20µs transient immunity during EMI events. | Use Scenario: Monitoring 5V infotainment SoC supply and 3.3V CAN transceiver supply in vehicle head unit with wide ambient temperature range. IC Role / Device Role / Timing Role: High-temp-rated (–40°C to +125°C) dual-supply supervisor asserting reset on undervoltage during cold cranking or load dump. Use Value: Ensures reliable boot recovery using push-pull RST output without external pullup, reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6716AUTLTD3-T | 6-pin SOT23; identical VTH1/VTH2 (4.625V/3.075V) and tRP (210ms), but includes WDI watchdog input | Supports watchdog-based software health monitoring; requires PCB layout change for extra pin | Select when firmware-level fault detection is required alongside power supervision |
| TPS3808G33DBVR | Single-supply (3.3V only), 200ms timeout, open-drain RST, 2.5µA ICC - no VCC2 monitoring capability | Limited to single-rail systems; lacks dual-threshold architecture and MR pullup | Choose only for cost-sensitive, single-voltage designs where secondary supply monitoring is unnecessary |
Compared with MAX6716AUTLTD3-T, the MAX6718UKYDD3 saves one pin and eliminates watchdog complexity for simpler, fixed-function supervision; versus TPS3808G33DBVR, it provides true dual-rail coverage and higher temperature rating but at higher quiescent current and cost.
Availability
MAX6718UKYDD3 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial control, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MAX6718UKYDD3 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 high-reliability applications including power management, sensing, and interface solutions.
The MAX6715A–MAX6729A family delivers ultra-low-voltage, multi-rail supervisory circuits optimized for space-constrained embedded systems demanding robust power-up/power-down sequencing and brownout protection.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6718UKYDD3?
The MAX6718UKYDD3 has factory-trimmed reset thresholds of 4.625V (±125mV) for VCC1 and 3.075V (±75mV) for VCC2, as defined by the 'YD' suffix per Maxim's Reset Voltage Threshold Suffix Guide - these values are measured at TA = +25°C and exhibit 20ppm/°C tempco.
Does the MAX6718UKYDD3 include a watchdog timer function?
No, the MAX6718UKYDD3 does not include a watchdog timer. It is a dual-supply supervisory circuit without WDI pin or watchdog logic; watchdog capability is present only in variants with '21' through '29' or '97' in the part number (e.g., MAX6721A–MAX6729A/MAX6797A).
What is the reset timeout period for the MAX6718UKYDD3, and how is it set?
The MAX6718UKYDD3 has a fixed 210ms minimum reset timeout period, indicated by the 'D3' suffix in its part number per Maxim's Reset Timeout Period Suffix Guide - this value is factory-programmed and not adjustable externally.
Can the MAX6718UKYDD3 monitor a third voltage rail?
No, the MAX6718UKYDD3 supports only dual-voltage monitoring (VCC1 and VCC2). Third-rail monitoring via RSTIN is available only on variants with '19', '20', '23'–'27' in the part number (e.g., MAX6719A, MAX6723A); the MAX6718UKYDD3 lacks the RSTIN pin and associated comparator.
Is the reset output of the MAX6718UKYDD3 push-pull or open-drain?
The MAX6718UKYDD3 features a push-pull active-low RST output referenced to VCC1, eliminating the need for an external pullup resistor - confirmed by its 'U' prefix (indicating push-pull) and absence of RSTIN/PFI/WDI pins in the 5-pin SOT23 pinout.
MAX6718UKYDD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 0.788V, 2.188V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6718UKYDD3 FAQ
1.How can I place an order for MAX6718UKYDD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718UKYDD3 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 MAX6718UKYDD3 reliable?
The price and inventory of MAX6718UKYDD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718UKYDD3 is usually 5 days.
3.What payment methods are accepted for MAX6718UKYDD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718UKYDD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718UKYDD3?
MAX6718UKYDD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718UKYDD3 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 MAX6718UKYDD3?
For technical support, including MAX6718UKYDD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718UKYDD3 requirements.
6.How does Aetrix verify that MAX6718UKYDD3 is sourced from the original manufacturer or authorized distributors?
All MAX6718UKYDD3 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 MAX6718UKYDD3 meets industry standards.
7.What is the process for return or replacement of MAX6718UKYDD3?
All MAX6718UKYDD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718UKYDD3, 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 MAX6718UKYDD3 part is unused and in its original packaging.
Return procedure for MAX6718UKYDD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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