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Analog Devices Inc./Maxim Integrated MAX6718AUKTZD1+T
- Part No.:
- MAX6718AUKTZD1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718AUKTZD1+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,879
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Product details
Overview
MAX6718AUKTZD1+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (primary) and VCC2 (secondary) with factory-trimmed reset thresholds of 4.625V (VTH1) and 3.075V (VTH2), 1.65ms minimum reset timeout, push-pull active-low RST output, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - deployed in telecom power management and industrial embedded controllers.
For engineers reviewing the MAX6718AUKTZD1+T datasheet, MAX6718AUKTZD1+T pinout, MAX6718AUKTZD1+T application, or MAX6718AUKTZD1+T equivalent, key selection criteria include dual-rail voltage monitoring capability, push-pull reset drive strength at low supply voltage, absence of watchdog/WDI functionality, and compatibility with systems requiring precise 4.625V/3.075V threshold pairing without external adjustment.
Technical Context
The MAX6718AUKTZD1+T implements independent dual-voltage supervision logic with separate comparators for VCC1 and VCC2, asserting reset when either supply falls below its factory-set threshold. Its internal reset timeout timer guarantees ≥1.65ms assertion after all monitored rails recover, with no restart-on-recovery hysteresis.
This variant lacks RSTIN, WDI, PFI, and PFO pins - confirmed by pin mapping - and uses only VCC1, VCC2, GND, MR, RST, and RST2 terminals. It features push-pull RST and RST2 outputs referenced to VCC1 and VCC2 respectively, enabling direct interface to microprocessor reset inputs without external pullups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (typ), factory-trimmed - ensures reliable reset assertion during 5V rail brownout before critical logic fails |
| VCC2 Reset Threshold | 3.075V (typ), factory-trimmed - matches common 3.3V I/O supply tolerance for coordinated system reset |
| Reset Timeout Period | 1.65ms (min), D1 suffix - provides sufficient hold time for microprocessor initialization after power recovery |
| Supply Current | 15µA (max at VCC1 < 5.5V) - enables battery-backed operation in portable equipment with minimal quiescent drain |
| Operating Temperature | -40°C to +125°C - supports deployment in automotive under-hood and industrial control environments |
| Reset Output Type | Push-pull active-low RST and RST2 - eliminates need for external pullup resistors and ensures fast, rail-to-rail reset signaling |
| Minimum Valid VCC | 0.8V on either VCC1 or VCC2 - guarantees correct reset state during deep brownout conditions where other supervisors fail |
Pinout & Package
MAX6718AUKTZD1+T is housed in a 6-pin SOT23-6 package (package code U6+1), with 1.6mm × 2.9mm footprint and 1.1mm height, optimized for space-constrained PCB layouts in telecom and industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1 - drives microprocessor reset pin directly without pullup |
| 2 | GND | Ground reference for all internal comparators and output drivers - must be low-impedance connection to system ground plane |
| 3 | MR | Active-low manual-reset input with 50kΩ internal pullup to VCC1 - momentary switch to GND initiates system reset |
| 4 | VCC2 | Secondary supply input powering VCC2 comparator and RST2 output - monitors 3.3V/2.5V rails independently of VCC1 |
| 5 | VCC1 | Primary supply input powering core logic and RST output - accepts 1.8V–5.5V with guaranteed operation down to 0.8V |
| 6 | RST2 | Active-low push-pull reset output referenced to VCC2 - enables independent reset signaling for secondary domain peripherals |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of primary (VCC1) and secondary (VCC2) rails with separate thresholds and reset timing - prevents partial-power-up failures |
| Push-pull RST and RST2 outputs | Eliminates external pullup resistors and reduces BOM count while ensuring fast, low-impedance reset assertion across full temperature range |
| Guaranteed reset validity at 0.8V | Ensures deterministic reset behavior during severe brownout - critical for fail-safe shutdown in automotive and industrial safety systems |
| Low 15µA supply current | Enables integration into always-on subsystems (e.g., RTC backup, wake-on-LAN) without compromising battery life |
| Manual reset with internal pullup | Reduces external component count - single-pole switch to GND suffices for field service or test-mode reset initiation |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring dual 5V/3.3V rails in base station power management unit during hot-swap insertion and AC loss events. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting synchronized reset to FPGA and ARM processor upon either rail dropout. Use Value: Prevents metastability and latch-up during asymmetric rail collapse by enforcing minimum 1.65ms reset hold time with push-pull drive. |
Use Scenario: Ensuring deterministic startup and fault recovery in DIN-rail mounted programmable logic controller with isolated 24V DC input and 5V/3.3V internal regulation. IC Role / Device Role / Timing Role: Primary/secondary voltage monitor triggering hardware reset of Cortex-M7 MCU and CAN transceivers during undervoltage. Use Value: Guarantees reset assertion even at VCC1 = 0.8V - essential for safe shutdown when input rectifier output sags during line transients. |
| Automotive Infotainment Head Unit | Medical Diagnostic Imaging Subsystem |
Use Scenario: Supervising 5V main logic rail and 3.3V display interface rail in vehicle infotainment ECU subjected to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Dual-supply supervisor providing independent reset signals to application SoC and LVDS display controller. Use Value: Factory-trimmed 4.625V/3.075V thresholds match automotive supply tolerances; -40°C to +125°C rating ensures reliability under hood. |
Use Scenario: Monitoring regulated 5V and 3.3V supplies powering FPGA-based image reconstruction engine and sensor interface ASIC in portable ultrasound device. IC Role / Device Role / Timing Role: Low-quiescent-current dual supervisor enabling battery-operated mode with <15µA standby drain. Use Value: Push-pull RST/RST2 outputs eliminate pullup resistors - reducing thermal noise and board area in high-precision analog signal path vicinity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6717AUKTZD1+T | Open-drain RST/RST2 outputs instead of push-pull; same thresholds and timeout | Requires external pullup resistors; suitable where level-shifting or wired-OR reset bus is needed | Select MAX6717AUKTZD1+T only if open-drain topology is required for bus sharing or mixed-voltage reset distribution |
| TPS3808G33DBVR | Single-supply (3.3V only), no VCC2 input; 3.08V threshold, 200ms timeout; SOT23-6 | Lacks dual-rail monitoring; intended for single-rail systems with longer timeout requirements | Choose TPS3808G33DBVR only for cost-sensitive 3.3V-only applications where secondary rail supervision is unnecessary |
Compared with MAX6717AUKTZD1+T, MAX6718AUKTZD1+T eliminates external pullups via push-pull drive, reducing component count and improving noise immunity; versus TPS3808G33DBVR, it adds true dual-rail supervision with independent VCC2 monitoring - essential for multivoltage systems requiring coordinated reset timing.
Availability
MAX6718AUKTZD1+T is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC I/O modules, and automotive infotainment head units requiring stable component supply with guaranteed long-term availability and AEC-Q100-aligned reliability.
Supply support for MAX6718AUKTZD1+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, emphasizing robustness, low power, and high integration.
MAX6715A–MAX6729A/MAX6797A product line delivers ultra-low-voltage microprocessor supervisory circuits targeting multivoltage embedded systems where simultaneous rail monitoring and fail-safe reset timing are critical.
FAQ
What is the reset threshold voltage for VCC1 on the MAX6718AUKTZD1+T?
The MAX6718AUKTZD1+T has a factory-trimmed VCC1 reset threshold of 4.625V (typical), with ±125mV tolerance over temperature. This value is fixed and non-adjustable, matching the 'T' suffix in the ordering guide for VCC1 and 'S' for VCC2. The MAX6718AUKTZD1+T uses this precise threshold to ensure reliable detection of 5V rail brownout before microprocessor malfunction occurs.
Does the MAX6718AUKTZD1+T support watchdog timer functionality?
No, the MAX6718AUKTZD1+T does not include watchdog timer functionality. Its pinout omits WDI (watchdog input), and the device variant is explicitly defined in the selector guide as non-watchdog. For watchdog capability, engineers must select MAX6721A–MAX6729A variants - the MAX6718AUKTZD1+T is optimized solely for dual-voltage supervision with manual reset and push-pull outputs.
What is the function of the RST2 pin on the MAX6718AUKTZD1+T?
The RST2 pin on the MAX6718AUKTZD1+T is an active-low push-pull reset output referenced to VCC2, asserting when VCC2 falls below its 3.075V threshold or when MR is pulled low. It enables independent reset signaling for peripherals powered by the secondary rail - such as I/O expanders or communication interfaces - without relying on the VCC1-referenced RST output.
Can the MAX6718AUKTZD1+T monitor a third voltage rail?
No, the MAX6718AUKTZD1+T cannot monitor a third voltage rail. It lacks the RSTIN pin required for adjustable auxiliary voltage monitoring, and its functional description confirms dual-supply operation only. For triple-voltage supervision, engineers should consider MAX6719A/MAX6720A variants, which include RSTIN and support external resistor-divider configuration down to 0.626V reference.
What is the maximum operating temperature range for the MAX6718AUKTZD1+T?
The MAX6718AUKTZD1+T operates over -40°C to +125°C, fully specified across this industrial/automotive temperature range. This rating is validated per the Absolute Maximum Ratings table and supported by thermal resistance data for the SOT23-6 package. The wide range ensures reliable performance in under-hood automotive modules and factory-floor industrial controllers where ambient temperatures exceed 85°C.
MAX6718AUKTZD1+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:
- 2.313V, 3.075V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1.1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6718AUKTZD1+T FAQ
1.How can I place an order for MAX6718AUKTZD1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718AUKTZD1+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 MAX6718AUKTZD1+T reliable?
The price and inventory of MAX6718AUKTZD1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718AUKTZD1+T is usually 5 days.
3.What payment methods are accepted for MAX6718AUKTZD1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718AUKTZD1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718AUKTZD1+T?
MAX6718AUKTZD1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718AUKTZD1+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 MAX6718AUKTZD1+T?
For technical support, including MAX6718AUKTZD1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718AUKTZD1+T requirements.
6.How does Aetrix verify that MAX6718AUKTZD1+T is sourced from the original manufacturer or authorized distributors?
All MAX6718AUKTZD1+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 MAX6718AUKTZD1+T meets industry standards.
7.What is the process for return or replacement of MAX6718AUKTZD1+T?
All MAX6718AUKTZD1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718AUKTZD1+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 MAX6718AUKTZD1+T part is unused and in its original packaging.
Return procedure for MAX6718AUKTZD1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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