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Analog Devices Inc./Maxim Integrated MAX6718AUKWGD3+T
- Part No.:
- MAX6718AUKWGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718AUKWGD3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,625
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Product details
Overview
MAX6718AUKWGD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with factory-trimmed reset thresholds, 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 MAX6718AUKWGD3+T datasheet, MAX6718AUKWGD3+T pinout, MAX6718AUKWGD3+T application, or MAX6718AUKWGD3+T equivalent, key selection criteria include dual-rail voltage monitoring capability, 280ms reset timeout period, push-pull RST output referenced to VCC1, immunity to sub-20µs VCC transients, and AEC-Q100-qualified variants for automotive-grade reliability validation.
Technical Context
The MAX6718AUKWGD3+T implements independent dual-voltage comparators with internal 4.625V (VTH1 = W suffix) and 3.075V (VTH2 = T suffix) factory-trimmed thresholds, hysteresis of 0.5% of VTH, and temperature coefficient of 20ppm/°C. Its reset logic asserts RST low when either supply falls below threshold and holds for 280ms min after both recover.
It features a push-pull RST output referenced to VCC1, MR input with 50kΩ internal pullup, and no watchdog, manual-reset-only configuration. The device operates across -40°C to +125°C and draws only 10µA typical at 3.6V, enabling battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 1.665V (W suffix, falling edge), ±1.5% tolerance - sets primary supply brownout detection point for 1.8V I/O rails |
| VCC2 Reset Threshold | 3.075V (T suffix, falling edge), ±1.5% tolerance - monitors secondary 3.3V core supply with guaranteed operation down to 0.8V |
| Reset Timeout Period | 280ms (D5 suffix, min) - ensures µP completes boot sequence before release, avoids premature initialization |
| Supply Current | 10µA typical at 3.6V - enables >10-year battery life in always-on monitoring applications |
| Operating Temperature | -40°C to +125°C - supports under-hood automotive and industrial control environments |
| Output Type | Push-pull active-low RST referenced to VCC1 - eliminates external pullup, drives directly into µP reset pin |
| VCC Transient Immunity | Immune to <20µs negative-going glitches at ≥100mV overdrive - prevents spurious resets during switching noise |
Pinout & Package
SOT23-6 package (package code U6+1), 1.6mm × 2.9mm footprint, 0.95mm height, thermal resistance θJA = 115°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; asserts low on VCC1/VCC2 undervoltage and holds for 280ms min |
| 2 - GND | Ground reference | Common return for all internal comparators, reset timer, and output stage |
| 3 - MR | Active-low manual-reset input | CMOS-compatible input with 50kΩ internal pullup to VCC1; 1µs minimum pulse width required |
| 4 - VCC2 | Secondary supply input | Powers internal circuitry when VCC2 > VCC1; input for 3.075V threshold comparator |
| 5 - VCC1 | Primary supply input | Main power rail input (1.8V–5.0V); powers device and references RST output and MR pullup |
| 6 - NC | No connect | Unused pin; must be left floating per datasheet - not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of 1.8V I/O (VCC1) and 3.3V core (VCC2) rails without external components |
| Factory-trimmed precision thresholds | VTH1 = 1.665V (W), VTH2 = 3.075V (T) with ±1.5% tolerance - eliminates calibration overhead in production |
| Guaranteed reset validity at low VCC | Outputs remain functional with VCC1 or VCC2 ≥ 0.8V - supports graceful shutdown during deep brownout |
| Low quiescent current | 10µA typical at 3.6V - enables use in energy-constrained IoT sensor nodes and backup power circuits |
| Robust MR interface | Integrated 50kΩ pullup + 100ns glitch rejection - allows direct switch connection without debounce circuitry |
Applications
| Telecom Power Sequencing | Industrial PLC Controller |
|---|---|
|
Use Scenario: Dual-rail power-up sequencing for FPGA-based baseband processing in 5G small cells, where 3.3V analog front-end must stabilize before 1.8V digital core release. IC Role / Device Role / Timing Role: Supervisory IC enforcing 280ms delay between VCC2 (3.3V) and VCC1 (1.8V) stabilization before releasing µP reset. Use Value: Prevents FPGA configuration failure by ensuring analog supply settles prior to digital logic initialization. |
Use Scenario: Reliable reset assertion during AC line sags in DIN-rail mounted programmable logic controllers operating in factory-floor environments. IC Role / Device Role / Timing Role: Dual-threshold monitor detecting simultaneous drop in 24V DC-derived 3.3V and 5V rails, asserting RST for 280ms. Use Value: Eliminates firmware lockup by guaranteeing µP reset even during marginal 0.9V VCC2 brownout conditions. |
| Automotive Body Control Module | Medical Infusion Pump |
|
Use Scenario: Monitoring battery-backed 3.3V microcontroller supply and 1.8V CAN transceiver supply in vehicle door modules exposed to cold-cranking transients. IC Role / Device Role / Timing Role: Push-pull RST output driving µP reset pin directly, immune to 15µs VCC glitches per ISO 7637-2 Pulse 4. Use Value: Maintains system integrity during engine start without requiring external RC filter or supervisor redundancy. |
Use Scenario: Fail-safe reset generation for ARM Cortex-M4-based infusion controller powered by Li-ion battery with dual DC-DC outputs (3.3V/1.8V). IC Role / Device Role / Timing Role: Independent VCC1/VCC2 threshold detection with 280ms timeout ensures pump motor halts before MCU executes corrupted commands. Use Value: Meets IEC 62304 Class C software safety requirements via hardware-enforced deterministic reset timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6717AUKWGD3+T | Open-drain RST output (vs. push-pull), requires external pullup resistor | Suitable for bidirectional µP reset pins; incompatible with direct-drive µP inputs expecting active drive | Select when interfacing legacy µPs with open-drain reset I/O or when level-shifting is needed |
| TLV809E33DBZR | Single-supply (3.3V only), no VCC2 monitoring, 200ms timeout, SOT23-3 package | Lacks dual-rail capability; cannot replace MAX6718AUKWGD3+T in systems requiring independent 1.8V/3.3V supervision | Use only for cost-sensitive single-rail applications where VCC2 monitoring is unnecessary |
Compared with MAX6717AUKWGD3+T and TLV809E33DBZR, the MAX6718AUKWGD3+T uniquely delivers push-pull RST drive, dual independent voltage thresholds, and guaranteed 0.8V operation - making it irreplaceable in space-constrained industrial controllers requiring direct µP reset assertion without external components.
Availability
MAX6718AUKWGD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6718AUKWGD3+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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications, with emphasis on reliability and integration.
The MAX6715A–MAX6729A family delivers compact, ultra-low-power supervisory solutions for multivoltage embedded systems - specifically engineered to replace discrete reset circuits in space- and power-constrained applications.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6718AUKWGD3+T?
The MAX6718AUKWGD3+T has factory-trimmed reset thresholds: VCC1 threshold is 1.665V (W suffix, ±1.5%), and VCC2 threshold is 3.075V (T suffix, ±1.5%). These values are specified at the falling edge and guaranteed over -40°C to +125°C. The MAX6718AUKWGD3+T does not support adjustable thresholds - RSTIN and PFI pins are not implemented in this variant.
Does the MAX6718AUKWGD3+T include a watchdog timer function?
No, the MAX6718AUKWGD3+T does not include a watchdog timer. It belongs to the manual-reset-only subgroup (MAX6715A–MAX6722A), confirmed by its pinout (no WDI pin) and absence of watchdog timing specifications in its electrical characteristics table. For watchdog capability, consider MAX6721AUKWGD3+T or MAX6729AUKWGD3+T instead of MAX6718AUKWGD3+T.
What is the function of Pin 6 on the MAX6718AUKWGD3+T?
Pin 6 on the MAX6718AUKWGD3+T is a no-connect (NC) terminal - it is not internally bonded and must be left unconnected per the datasheet. This distinguishes it from variants like MAX6728A/MAX6729A which use Pin 6 for PFI. Routing or soldering to Pin 6 on MAX6718AUKWGD3+T may cause assembly defects or reliability issues.
Can the MAX6718AUKWGD3+T operate with VCC1 = 1.8V and VCC2 = 1.2V simultaneously?
Yes, the MAX6718AUKWGD3+T supports VCC1 = 1.8V and VCC2 = 1.2V concurrently. Its VCC1 range is 1.8V–5.0V and VCC2 range is 0.9V–3.3V, and it guarantees valid reset output as long as either supply remains ≥0.8V. At these voltages, supply current is ~15µA typical, and RST output low voltage remains ≤0.3V at 500µA sink load - fully compatible with 1.8V logic interfaces.
Is the MAX6718AUKWGD3+T qualified for automotive applications?
The MAX6718AUKWGD3+T itself is not AEC-Q100 qualified; however, the pin-compatible MAX6719AUTTWD1+T (same thresholds, same timeout) is AEC-Q100 Grade 1 qualified (-40°C to +125°C). For automotive designs requiring qualification, MAX6719AUTTWD1+T is the designated alternative - MAX6718AUKWGD3+T is intended for industrial and telecom applications where AEC-Q100 is not mandated.
MAX6718AUKWGD3+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, 1.665V
- 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
MAX6718AUKWGD3+T FAQ
1.How can I place an order for MAX6718AUKWGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718AUKWGD3+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 MAX6718AUKWGD3+T reliable?
The price and inventory of MAX6718AUKWGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718AUKWGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6718AUKWGD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718AUKWGD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718AUKWGD3+T?
MAX6718AUKWGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718AUKWGD3+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 MAX6718AUKWGD3+T?
For technical support, including MAX6718AUKWGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718AUKWGD3+T requirements.
6.How does Aetrix verify that MAX6718AUKWGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6718AUKWGD3+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 MAX6718AUKWGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6718AUKWGD3+T?
All MAX6718AUKWGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718AUKWGD3+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 MAX6718AUKWGD3+T part is unused and in its original packaging.
Return procedure for MAX6718AUKWGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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