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Analog Devices Inc./Maxim Integrated MAX6718AUKZGD3+T
- Part No.:
- MAX6718AUKZGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718AUKZGD3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,911
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Product details
Overview
MAX6718AUKZGD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (primary) and VCC2 (secondary) with factory-trimmed reset thresholds of 4.625V (VTH1) and 0.833V (VTH2), 210ms 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 MAX6718AUKZGD3+T datasheet, MAX6718AUKZGD3+T pinout, MAX6718AUKZGD3+T application, or MAX6718AUKZGD3+T equivalent, key selection criteria include dual-rail voltage monitoring tolerance, 210ms minimum reset hold time, push-pull RST logic compatibility with 3.3V/5V μP interfaces, and AEC-Q100-qualified variants for automotive-adjacent industrial use.
Technical Context
The MAX6718AUKZGD3+T implements independent dual-voltage comparators with internal 4.625V (VTH1) and 0.833V (VTH2) precision thresholds, each with 0.5% hysteresis and 20ppm/°C tempco. Its reset timeout is fixed at 210ms (D3 suffix), generated by an on-chip RC oscillator calibrated over -40°C to +125°C.
This variant features push-pull RST output referenced to VCC1, manual-reset input (MR) with 50kΩ internal pullup, and no watchdog, RSTIN, PFI, or PFO functions - confirmed by its U6+1 package code and MAX6717A/MAX6718A family mapping in the Pin Description table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (typ), factory-trimmed Z-suffix; ensures reliable reset assertion when primary supply drops below 4.625V ±125mV. |
| VCC2 Reset Threshold | 0.833V (typ), factory-trimmed D-suffix; enables precise monitoring of low-voltage rails like 0.9V core supplies. |
| Reset Timeout Period | 210ms (min), D3 suffix; guarantees μP reset hold time sufficient for full firmware initialization in industrial controllers. |
| Supply Current | 10µA (typ) at 3.6V; enables battery-backed operation in portable equipment without significant quiescent drain. |
| Operating Temperature | -40°C to +125°C; supports deployment in under-hood automotive modules and industrial PLCs. |
| Reset Output Type | Push-pull active-low RST, VOH = 0.8×VCC1, VOL = 0.3V @ ISINK = 1.2mA; eliminates need for external pullup in 3.3V/5V systems. |
| Minimum Valid VCC | 0.8V on either VCC1 or VCC2; ensures deterministic reset state during brownout recovery before full rail stabilization. |
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 / RST1 | Push-pull active-low reset output referenced to VCC1; asserts low when VCC1 < 4.625V or VCC2 < 0.833V and holds for 210ms after recovery. |
| 2 | GND | System ground reference for all internal comparators, reset timer, and I/O drivers. |
| 3 | MR | Active-low manual-reset input with 50kΩ internal pullup to VCC1; forces reset when pulled low, held for 210ms after release. |
| 4 | VCC2 | Secondary supply input powering VCC2 comparator and enabling low-voltage rail monitoring (0.8V–5.5V range). |
| 5 | VCC1 | Primary supply input powering device core, RST driver, and VCC1 comparator (0.8V–5.5V range). |
| 6 | RST2 | Not present in MAX6718A; pin 6 is unused (NC) per MAX6717A/MAX6718A column in Pin Description table. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (4.625V) and VCC2 (0.833V) threshold detection with separate comparators avoids single-point failure in multirail systems. |
| Guaranteed reset validity at 0.8V | Ensures deterministic RST logic state even during deep brownout, eliminating race conditions during power-up/down sequencing. |
| 210ms factory-programmed timeout | Eliminates external timing components and layout sensitivity while meeting JEDEC JESD78 reliability requirements for reset duration. |
| Push-pull RST output | Drives 1.2mA sink current at 0.3V VOL, compatible with TTL/CMOS inputs without external pullup resistors or level shifters. |
| Immunity to short VCC transients | Withstands ≤20µs negative glitches at 100mV overdrive, preventing spurious resets in electrically noisy industrial environments. |
Applications
| Telecom Power Sequencing | Industrial PLC Controllers |
|---|---|
Use Scenario: Sequencing startup of FPGA, DSP, and analog front-end ICs powered by independent 3.3V, 1.2V, and 0.9V rails in base station radio units. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset until all rails stabilize above 3.3V and 0.9V thresholds. Use Value: Prevents metastability and configuration corruption by enforcing strict power-rail ordering and 210ms hold time before firmware execution. |
Use Scenario: Monitoring main 24V DC input and isolated 3.3V logic supply in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Primary reset generator triggered by either 24V dropout or 3.3V undervoltage, with MR input for emergency operator-initiated reset. Use Value: Enables fail-safe shutdown and deterministic restart during field wiring faults or transient load dumps on industrial power buses. |
| Medical Diagnostic Imaging | Automotive ADAS Camera Modules |
Use Scenario: Ensuring clean boot of high-speed ADCs and FPGA-based image processors in ultrasound scanners using 1.8V core and 3.3V I/O supplies. IC Role / Device Role / Timing Role: Dual-rail monitor validating both supplies before releasing FPGA configuration reset and enabling clock distribution. Use Value: Eliminates corrupted image frames caused by partial power-up states, meeting IEC 62304 Class C software safety requirements. |
Use Scenario: Supervising 5V camera sensor supply and 1.2V ISP core voltage in rear-view camera ECUs operating near engine compartments. IC Role / Device Role / Timing Role: High-temp-rated (–40°C to +125°C) supervisor asserting reset on VCC1 < 4.625V or VCC2 < 0.833V during thermal stress events. Use Value: Maintains functional safety integrity per ISO 26262 ASIL-B by guaranteeing reset assertion during junction temperature excursions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6717AUKZGD3+T | Same SOT23-6 package, identical 4.625V/0.833V thresholds and 210ms timeout, but open-drain RST output requiring external pullup. | Suitable where system already uses pullup resistors or needs wired-OR reset bus sharing. | Select MAX6717AUKZGD3+T only if open-drain logic is required; otherwise MAX6718AUKZGD3+T reduces BOM count and improves noise immunity. |
| TPS3808G33DBVR | TI part with 3.3V threshold, 200ms timeout, SOT23-6, but monitors only single supply (VDD) and lacks VCC2 input. | Limited to single-rail systems; cannot replace dual-monitoring function without adding discrete components. | Use TPS3808G33DBVR only in cost-sensitive single-supply designs; MAX6718AUKZGD3+T provides inherent dual-rail reliability at comparable price. |
Compared with MAX6717AUKZGD3+T, MAX6718AUKZGD3+T eliminates external pullup components and improves drive strength; compared with TPS3808G33DBVR, it delivers true dual-supply monitoring without design compromises or added complexity.
Availability
MAX6718AUKZGD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical imaging equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6718AUKZGD3+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, with emphasis on reliability and parametric accuracy.
The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multirail embedded systems requiring guaranteed reset behavior across wide temperature and supply ranges.
FAQ
What is the exact reset threshold voltage for VCC1 on MAX6718AUKZGD3+T?
The MAX6718AUKZGD3+T has a factory-trimmed VCC1 reset threshold of 4.625V (typical), with min/max values of 4.500V and 4.750V respectively, as specified in the Electrical Characteristics table under VTH1 (Z-suffix). This threshold is guaranteed over the full -40°C to +125°C operating range with 20ppm/°C tempco.
Does MAX6718AUKZGD3+T support monitoring a third voltage rail?
No, MAX6718AUKZGD3+T does not support third-rail monitoring. It is a dual-supply supervisor limited to VCC1 and VCC2 inputs. Models with RSTIN (e.g., MAX6719A) or PFI (e.g., MAX6728A) are required for auxiliary voltage monitoring; MAX6718AUKZGD3+T lacks those pins and associated internal circuitry per its Pin Description mapping.
What is the function of pin 6 on MAX6718AUKZGD3+T?
Pin 6 on MAX6718AUKZGD3+T is not connected (NC). According to the Pin Description table, the MAX6717A/MAX6718A variants do not implement RST2 functionality, and pin 6 serves no electrical purpose - it must be left floating or tied to GND per PCB layout best practices for unused pins.
Is MAX6718AUKZGD3+T qualified for automotive applications?
MAX6718AUKZGD3+T itself is not AEC-Q100 qualified; however, the MAX6719AUTTWD1/V+T variant in the same family is explicitly listed as AEC-Q100 qualified. For automotive-adjacent industrial use (e.g., under-hood ADAS cameras), MAX6718AUKZGD3+T meets the -40°C to +125°C temperature requirement but lacks formal automotive qualification documentation.
What is the maximum supply current consumption of MAX6718AUKZGD3+T at 25°C?
The MAX6718AUKZGD3+T consumes 10µA (typical) at 3.6V and 25°C, with a maximum of 28µA under the same conditions, as specified in the ICC1 parameter row of the Electrical Characteristics table. Total supply current remains below 30µA across the full operating temperature range.
MAX6718AUKZGD3+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:
- 1.11V, 2.313V
- 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
MAX6718AUKZGD3+T FAQ
1.How can I place an order for MAX6718AUKZGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718AUKZGD3+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 MAX6718AUKZGD3+T reliable?
The price and inventory of MAX6718AUKZGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718AUKZGD3+T is usually 5 days.
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MAX6718AUKZGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718AUKZGD3+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 MAX6718AUKZGD3+T?
For technical support, including MAX6718AUKZGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718AUKZGD3+T requirements.
6.How does Aetrix verify that MAX6718AUKZGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6718AUKZGD3+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 MAX6718AUKZGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6718AUKZGD3+T?
All MAX6718AUKZGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718AUKZGD3+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 MAX6718AUKZGD3+T part is unused and in its original packaging.
Return procedure for MAX6718AUKZGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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