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Analog Devices Inc./Maxim Integrated MAX6718AUKSVD3+T
- Part No.:
- MAX6718AUKSVD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718AUKSVD3+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
MAX6718AUKSVD3+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), 280ms 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 MAX6718AUKSVD3+T datasheet, MAX6718AUKSVD3+T pinout, MAX6718AUKSVD3+T application, or MAX6718AUKSVD3+T equivalent, key selection criteria include dual-rail voltage monitoring accuracy, 280ms reset timeout compliance for ARM Cortex-M boot timing, push-pull RST drive capability into 500µA loads, and operation across -40°C to +125°C industrial temperature range.
Technical Context
The MAX6718AUKSVD3+T implements independent dual-voltage comparators with internal 4.625V (VTH1) and 3.075V (VTH2) thresholds referenced to VCC1 and VCC2 respectively, each feeding a shared reset timeout timer with fixed 280ms minimum assertion period. Its push-pull RST output is referenced to VCC1 and sinks ≥500µA at 0.3V VOL while sourcing ≥0.8×VCC1 VOH.
This variant includes manual-reset input (MR) with 50kΩ internal pullup to VCC1, glitch rejection of 100ns, and MR-to-RST delay of 200ns; it excludes watchdog, RSTIN, PFI/PFO, and RST2 functions - confirmed by its suffix "D3" (280ms timeout) and "UKSV" (6-pin SOT23, push-pull RST, VTH1=4.625V/VTH2=3.075V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (factory-trimmed, ±125mV tolerance) - ensures reliable reset assertion during 5V rail brownout before critical logic fails. |
| VCC2 Reset Threshold | 3.075V (factory-trimmed, ±75mV tolerance) - matches common 3.3V I/O supply margin for safe deassertion after power recovery. |
| Reset Timeout Period | 280ms (min) - satisfies ARM Cortex-M4/M7 boot loader timing requirements and avoids premature release during slow-ramp supplies. |
| Supply Current | 15µA (typ) at 3.6V - enables use in always-on battery-backed subsystems without measurable drain impact. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive ECUs and industrial motor drives with extended thermal cycling. |
| RST Output Type | Push-pull active-low - eliminates need for external pullup resistor and drives 500µA load directly into µP reset pin. |
| Reset Validity Voltage | Guaranteed down to VCC1 or VCC2 = 0.8V - ensures deterministic reset state during deep undervoltage conditions before silicon latch-up. |
Pinout & Package
MAX6718AUKSVD3+T is housed in a 6-pin SOT23-6 package (package code U6+1), with 1.6mm × 2.9mm footprint, 0.95mm height, and thermal resistance θJA = 115°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST/RST1 | Active-low push-pull reset output referenced to VCC1; asserts when VCC1 < 4.625V or VCC2 < 3.075V; holds low for 280ms min after recovery. |
| 2 | GND | System ground reference for all internal comparators, timers, and output drivers; must be low-impedance connection. |
| 3 | MR | Active-low manual-reset input with 50kΩ internal pullup to VCC1; 1µs minimum pulse width; 200ns MR-to-RST delay. |
| 4 | VCC2 | Secondary supply input (0.8V–5.5V); powers internal VCC2 comparator and sets RST2 reference if enabled (not present in this variant). |
| 5 | VCC1 | Primary supply input (0.8V–5.5V); powers core logic, references RST output, and supplies MR pullup. |
| 6 | NC | No connect - pin 6 is unused and must remain floating per datasheet; not bonded internally in MAX6718A variant. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (4.625V) and VCC2 (3.075V) threshold detection with separate hysteresis prevents false resets during cross-rail transients. |
| Push-pull RST output | Drives µP reset pin directly without external pullup; supports 500µA sink current at 0.3V VOL, eliminating BOM cost and layout area. |
| 280ms fixed reset timeout | Guaranteed minimum duration meets JEDEC JESD79-4 DDR4 initialization timing and avoids race conditions in multi-core boot sequences. |
| Manual-reset with integrated pullup | 50kΩ internal MR pullup to VCC1 removes need for external resistor; 100ns glitch rejection prevents noise-induced spurious resets. |
| Ultra-low operating current | 15µA typical ICC1 at 3.6V enables >10-year battery life in smart meter backup supervisors and IoT edge nodes. |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Sequencing 5V control logic and 3.3V FPGA configuration rails in 4G/5G base station remote radio units. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting reset until both VCC1 ≥ 4.625V and VCC2 ≥ 3.075V are stable, then holding 280ms for FPGA configuration lock. Use Value: Prevents partial configuration and metastability by enforcing strict dual-rail readiness before releasing µP reset. |
Use Scenario: Monitoring main 24V DC-DC output (VCC1) and isolated 3.3V I/O supply (VCC2) in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Asserting system-wide reset on either rail undervoltage, with 280ms timeout ensuring firmware watchdog initialization completes before I/O enable. Use Value: Eliminates need for discrete comparators and RC timers, reducing component count by 7 parts per module and improving MTBF. |
| Automotive Body Control Module | Medical Infusion Pump Controller |
|
Use Scenario: Supervising 5V microcontroller supply (VCC1) and 3.3V CAN transceiver supply (VCC2) in under-dash BCMs exposed to cold-crank transients. IC Role / Device Role / Timing Role: Maintaining reset during VCC1 dip to 0.8V (guaranteed valid), then releasing only after both rails exceed thresholds and 280ms timeout expires. Use Value: Ensures deterministic restart after ISO 16750-2 cold-crank events without requiring external brownout hysteresis networks. |
Use Scenario: Securing safety-critical reset behavior in battery-powered infusion pumps where 5V MCU and 3.3V sensor interface rails must be validated pre-infusion. IC Role / Device Role / Timing Role: Providing fail-safe reset assertion on any rail failure, with 280ms timeout allowing full self-test execution before enabling motor driver. Use Value: Meets IEC 62304 Class C software safety requirements by guaranteeing hardware-enforced reset hold time independent of firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6716AUKSVD3+T | Open-drain RST output (vs. push-pull), same thresholds and 280ms timeout; requires external 10kΩ pullup. | Suitable where µP reset pin has internal pullup or where level-shifting is needed between VCC1 and another domain. | Select when board already uses open-drain reset topology or when driving multiple loads sharing one reset net. |
| TPS3808G33DBVR | Single-supply monitor (3.3V threshold only), 200ms timeout, 2.5µA quiescent current; no VCC2 input or MR pin. | Limited to single-rail systems; lacks dual-monitoring capability and manual reset functionality. | Choose only for cost-sensitive, single-rail designs where VCC2 supervision is handled separately. |
Compared with MAX6718AUKSVD3+T, MAX6716AUKSVD3+T requires external pullup but offers identical timing and thresholds, while TPS3808G33DBVR reduces cost and current but sacrifices dual-rail monitoring and MR support - making MAX6718AUKSVD3+T optimal for space-constrained dual-supply systems needing robust, self-contained reset control.
Availability
MAX6718AUKSVD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive body control modules requiring stable component supply with full AEC-Q100-aligned qualification and long-term production continuity.
Supply support for MAX6718AUKSVD3+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 reliability, low power, and high integration.
The MAX6715A–MAX6729A family delivers compact, ultra-low-voltage supervisory circuits targeting multirail embedded systems where simultaneous VCC1/VCC2 monitoring, guaranteed sub-1V operation, and configurable reset timing are essential.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6718AUKSVD3+T?
The MAX6718AUKSVD3+T has a factory-trimmed VCC1 reset threshold of 4.625V (typical), with guaranteed limits of 4.500V (min) and 4.750V (max) over temperature. This value is fixed by the "V" suffix in the ordering code and applies specifically to the MAX6718AUKSVD3+T variant - not adjustable and not dependent on external components.
Does the MAX6718AUKSVD3+T support monitoring a third voltage rail?
No, the MAX6718AUKSVD3+T does not support third-rail monitoring. It is a dual-supply supervisor only, with dedicated VCC1 and VCC2 inputs. Variants like MAX6719A or MAX6723A include RSTIN for adjustable third-rail monitoring, but MAX6718AUKSVD3+T omits RSTIN, WDI, PFI, and RST2 pins entirely per its pinout and functional description.
What is the function of pin 6 on the MAX6718AUKSVD3+T?
Pin 6 on the MAX6718AUKSVD3+T is a no-connect (NC) terminal - it is not bonded internally and must remain unconnected on the PCB. This is confirmed by the MAX6718A-specific pin table, which shows pin 6 as blank for all MAX6717A/MAX6718A variants, distinguishing it from MAX6728A/MAX6729A which assign pin 6 to PFI.
Can the MAX6718AUKSVD3+T operate with VCC2 lower than VCC1?
Yes, the MAX6718AUKSVD3+T is explicitly designed to operate with VCC2 < VCC1 - including cases where VCC2 = 0.8V while VCC1 = 5.0V. Its internal architecture powers comparators from the higher of the two rails, and reset assertion occurs independently if either rail falls below its respective threshold, per Absolute Maximum Ratings and Electrical Characteristics tables.
Is the MAX6718AUKSVD3+T qualified for automotive applications?
The MAX6718AUKSVD3+T is not AEC-Q100 qualified; only specific variants like MAX6719AUTTWD1/V+T carry that qualification. However, MAX6718AUKSVD3+T operates across -40°C to +125°C and meets industrial reliability standards, making it suitable for non-safety-critical automotive subsystems such as infotainment power management - but not for ASIL-B/C domains requiring formal AEC-Q100 certification.
MAX6718AUKSVD3+T 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:
- 1.575V, 2.925V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6718AUKSVD3+T FAQ
1.How can I place an order for MAX6718AUKSVD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718AUKSVD3+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 MAX6718AUKSVD3+T reliable?
The price and inventory of MAX6718AUKSVD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718AUKSVD3+T is usually 5 days.
3.What payment methods are accepted for MAX6718AUKSVD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718AUKSVD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718AUKSVD3+T?
MAX6718AUKSVD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718AUKSVD3+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 MAX6718AUKSVD3+T?
For technical support, including MAX6718AUKSVD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718AUKSVD3+T requirements.
6.How does Aetrix verify that MAX6718AUKSVD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6718AUKSVD3+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 MAX6718AUKSVD3+T meets industry standards.
7.What is the process for return or replacement of MAX6718AUKSVD3+T?
All MAX6718AUKSVD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718AUKSVD3+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 MAX6718AUKSVD3+T part is unused and in its original packaging.
Return procedure for MAX6718AUKSVD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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