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Analog Devices Inc./Maxim Integrated MAX6718AUKSDD3+
- Part No.:
- MAX6718AUKSDD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718AUKSDD3+.pdf
- Description:
- POWER SUPPLY SUPPORT CIRCUIT, AD
- Quantity:
- Payment:
- Shipping:
Inventory:1,318
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Product details
Overview
MAX6718AUKSDD3+ from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, monitoring VCC1 (1.62V threshold) and VCC2 (0.788V threshold) with 210ms reset timeout, push-pull active-low RST output, and manual-reset input - used to ensure reliable boot and brownout recovery in battery-powered embedded systems.
For engineers reviewing the MAX6718AUKSDD3+ datasheet, MAX6718AUKSDD3+ pinout, MAX6718AUKSDD3+ application, or MAX6718AUKSDD3+ equivalent, key selection criteria include guaranteed reset validity down to 0.8V on either supply rail, 14µA typical supply current at 3.6V, immunity to sub-20µs VCC transients, and compatibility with 1.2V–5.5V system rails.
Technical Context
The MAX6718AUKSDD3+ integrates two independent voltage comparators with factory-trimmed thresholds (VTH1 = 1.62V ±45mV, VTH2 = 0.788V ±25mV), a 210ms monostable reset timer, and internal 50kΩ MR pullup. It asserts RST low when either VCC1 or VCC2 falls below its threshold and holds reset for the full timeout after recovery.
No watchdog, RSTIN, PFI, or PFO functions are present - confirmed by pin configuration (5-pin SOT23 with pins: RST, GND, MR, VCC2, VCC1) and ordering suffix "D3" indicating 210ms timeout without auxiliary features. Reset output is push-pull referenced to VCC1 with VOL ≤ 0.4V at 3.2mA sink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 1.62V (±45mV) - ensures reliable reset assertion during 1.8V rail brownout |
| VCC2 Threshold | 0.788V (±25mV) - supports monitoring of 0.9V core supplies with margin |
| Reset Timeout | 210ms (min) - provides sufficient hold time for slow-starting DC-DC converters |
| Supply Current | 14µA (typ at 3.6V) - enables multi-year operation in coin-cell–powered devices |
| Operating Temp | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| Reset Validity | Down to VCC1 or VCC2 = 0.8V - guarantees correct logic state during deep undervoltage conditions |
| Output Type | Push-pull active-low RST - eliminates need for external pullup resistor on reset line |
Pinout & Package
MAX6718AUKSDD3+ uses a 5-pin SOT23 package (2.9mm × 1.6mm × 1.1mm) with gull-wing leads, RoHS-compliant, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low reset output | Push-pull driver referenced to VCC1; sinks ≥3.2mA at VCC1 ≥4.5V; no external pullup required |
| GND | Ground reference | Common return for all internal comparators, timer, and output stage |
| MR | Active-low manual-reset input | Internally pulled up to VCC1 (50kΩ); asserts reset when pulled ≤0.3×VCC1 |
| VCC2 | Secondary supply input | Powers internal circuitry when VCC2 > VCC1; monitored against 0.788V threshold |
| VCC1 | Primary supply input | Powers internal circuitry when VCC1 > VCC2; monitored against 1.62V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail monitoring with independent thresholds | Simultaneously supervises 1.8V I/O and 0.9V core rails without external components |
| Guaranteed reset validity at 0.8V supply | Ensures deterministic reset behavior during deep brownout, critical for flash write integrity |
| 210ms factory-programmed timeout | Matches typical power-up sequencing delays of LDOs and buck converters in portable designs |
| 14µA ultra-low quiescent current | Reduces standby power in always-on IoT sensors and wearables by >50% vs. legacy supervisors |
| Push-pull RST output | Eliminates BOM cost and board space for external pullup resistor; simplifies layout |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: A wireless temperature sensor operates from a CR2032 coin cell, using a 1.8V MCU and 0.9V RF transceiver. IC Role / Device Role / Timing Role: MAX6718AUKSDD3+ monitors both rails and asserts reset if either drops during cold-start or battery depletion. Use Value: Prevents corrupted sensor readings or failed BLE advertisements by ensuring MCU only runs with valid supply voltages. | Use Scenario: An isolated digital input module in a factory automation cabinet powered by 24VDC-derived 1.8V/0.9V rails. IC Role / Device Role / Timing Role: Supervises field-side and logic-side supplies; triggers hardware reset on undervoltage caused by EMI-induced rail sag. Use Value: Avoids spurious I/O toggling or firmware lockup during transient line disturbances common in motor-drive environments. |
| Medical Wearable Patch | Automotive Body Control Module (BCM) |
Use Scenario: A disposable ECG patch with ultra-low-power ARM Cortex-M0+ MCU and analog front-end. IC Role / Device Role / Timing Role: Ensures clean startup and brownout recovery across 1.8V digital and 0.9V analog domains during battery voltage decay. Use Value: Guarantees clinical-grade data acquisition integrity by preventing partial register initialization during marginal supply conditions. | Use Scenario: BCM subassembly monitoring 1.8V CAN controller and 0.9V microcontroller core in under-hood environment. IC Role / Device Role / Timing Role: Dual-supply supervision with -40°C to +125°C operation ensures reset assertion during cold cranking or thermal stress. Use Value: Meets ISO 16750-2 pulse test requirements by maintaining valid reset state even at 0.8V supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G16DBVR | Single-supply (VDD only), 1.6V threshold, 200ms timeout, open-drain RST | Lacks VCC2 monitoring; requires external pullup; lower temp range (-40°C to +105°C) | Select when only primary rail supervision is needed and board space allows pullup resistor |
| ADM6718AKSZ-REEL7 | Same 5-pin SOT23, dual-rail, 1.6V/0.79V thresholds, 200ms timeout, push-pull RST | Identical functionality but different reset timing tolerance (±15% vs ±30%) and higher ICC (20µA typ) | Prefer for tighter timeout accuracy where 200ms vs 210ms matters in safety-critical sequencing |
Compared with TPS3808G16DBVR and ADM6718AKSZ-REEL7, MAX6718AUKSDD3+ offers the widest operating temperature range (+125°C), lowest quiescent current (14µA), and factory-trimmed 210ms timeout optimized for industrial power-up delays - making it optimal for extended-life, high-reliability embedded systems.
Availability
MAX6718AUKSDD3+ is available at Aetrix Electronics and suitable for battery-powered IoT sensors, industrial PLC modules, medical wearables, and automotive body control units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6718AUKSDD3+ 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 industrial, automotive, and communications markets, emphasizing reliability, low power, and small form factor.
The MAX6715A–MAX6729A family delivers ultra-low-voltage dual/triple supervisory circuits targeting space-constrained, battery-operated, and high-temperature embedded systems where supply rail integrity is mission-critical.
FAQ
What is the exact reset threshold voltage for VCC1 on MAX6718AUKSDD3+?
The MAX6718AUKSDD3+ has a factory-trimmed VCC1 reset threshold of 1.62V (minimum 1.575V, maximum 1.665V) with ±25mV typical tolerance over temperature. This value is fixed by the "W" suffix in the part number and applies across the full -40°C to +125°C operating range with 20ppm/°C tempco.
Does MAX6718AUKSDD3+ support watchdog timer functionality?
No, MAX6718AUKSDD3+ does not include a watchdog timer. The "D3" suffix denotes 210ms reset timeout only, and the 5-pin SOT23 package lacks WDI pin. Watchdog capability requires 6-pin or larger variants such as MAX6721A–MAX6729A/MAX6797A.
Can MAX6718AUKSDD3+ monitor a 1.2V supply as VCC2?
Yes, MAX6718AUKSDD3+ can monitor a 1.2V supply on VCC2 because its VCC2 threshold is 0.788V - well below 1.2V - and the device guarantees valid reset operation as long as VCC2 remains ≥0.8V. The 0.788V threshold provides 412mV of undervoltage margin before reset assertion.
What is the maximum load current the RST output of MAX6718AUKSDD3+ can drive?
The push-pull RST output of MAX6718AUKSDD3+ can sink up to 3.2mA while maintaining VOL ≤ 0.4V (at VCC1 ≥ 4.5V), and source up to 800µA while maintaining VOH ≥ 0.8×VCC1. This drives standard CMOS inputs directly without buffering in most microcontroller reset interfaces.
Is MAX6718AUKSDD3+ compatible with 1.0V logic systems?
MAX6718AUKSDD3+ is not rated for 1.0V VCC1 operation: its absolute minimum VCC1 is 0.8V, but the VCC1 threshold is 1.62V - meaning it cannot supervise a true 1.0V rail. For 1.0V systems, use MAX6717A variants with lower VTH1 options (e.g., "E" = 0.81V) or consider the MAX6727A series with adjustable RSTIN input.
MAX6718AUKSDD3+ 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, 2.925V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6718AUKSDD3+ FAQ
1.How can I place an order for MAX6718AUKSDD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718AUKSDD3+ 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 MAX6718AUKSDD3+ reliable?
The price and inventory of MAX6718AUKSDD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718AUKSDD3+ is usually 5 days.
3.What payment methods are accepted for MAX6718AUKSDD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718AUKSDD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718AUKSDD3+?
MAX6718AUKSDD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718AUKSDD3+ 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 MAX6718AUKSDD3+?
For technical support, including MAX6718AUKSDD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718AUKSDD3+ requirements.
6.How does Aetrix verify that MAX6718AUKSDD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6718AUKSDD3+ 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 MAX6718AUKSDD3+ meets industry standards.
7.What is the process for return or replacement of MAX6718AUKSDD3+?
All MAX6718AUKSDD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718AUKSDD3+, 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 MAX6718AUKSDD3+ part is unused and in its original packaging.
Return procedure for MAX6718AUKSDD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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