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Analog Devices Inc./Maxim Integrated MAX6718AUKYHD3+T
- Part No.:
- MAX6718AUKYHD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718AUKYHD3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,588
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Product details
Overview
MAX6718AUKYHD3+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, 140ms minimum reset timeout, push-pull active-low RST output, and manual-reset input - used to ensure reliable power-on reset and brownout recovery in telecom and industrial embedded systems.
For engineers reviewing the MAX6718AUKYHD3+T datasheet, MAX6718AUKYHD3+T pinout, MAX6718AUKYHD3+T application, or MAX6718AUKYHD3+T equivalent, this page delivers verified specifications, validated pin functions, confirmed dual-supply monitoring behavior, and real-world substitution guidance for multivoltage system design.
Technical Context
The MAX6718AUKYHD3+T implements independent voltage comparators for VCC1 and VCC2, each with ±0.5% hysteresis and 20ppm/°C tempco, asserting reset when either supply falls below its trimmed threshold. It guarantees valid reset logic down to VCC1 or VCC2 = 0.8V and features internal 50kΩ MR pullup with 1µs minimum pulse width support.
This variant includes push-pull RST output referenced to VCC1, 140ms reset timeout (D3 suffix), no watchdog or RSTIN/PFI functionality, and operates across –40°C to +125°C. Its SOT23-6 footprint supports compact PCB layouts in space-constrained applications requiring dual-rail supervision without auxiliary monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VCC1 = 0.8V to 5.5V; VCC2 = 0.8V to 5.5V - ensures operation during deep brownout and compatibility with 1.2V–5V system rails. |
| Reset Threshold Accuracy | ±1.5% over temperature - enables precise power-rail qualification without external calibration. |
| Reset Timeout Period | 140ms (min) - provides sufficient hold time for slow-starting processors and memory initialization sequences. |
| Supply Current | 15µA typical at 3.6V - minimizes quiescent load on battery-backed or energy-harvested systems. |
| Reset Output Type | Push-pull active-low RST - eliminates need for external pullup and drives directly into CMOS inputs. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial control, and telecom base station environments. |
| Reset Valid Down To | VCC1 or VCC2 ≥ 0.8V - guarantees deterministic reset assertion even during severe undervoltage conditions. |
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/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts low on VCC1/VCC2 undervoltage or MR activation. |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers. |
| 3 | MR | Active-low manual-reset input with internal 50kΩ pullup to VCC1; resets system on logic-low pulse ≥1µs. |
| 4 | VCC2 | Secondary supply input powering VCC2 comparator and enabling dual-rail monitoring capability. |
| 5 | VCC1 | Primary supply input powering core logic, RST driver, and VCC1 comparator; defines RST output high level. |
| 6 | NC | No-connect pin - left unconnected per datasheet; not internally bonded. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply monitoring | Simultaneous VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) supervision with separate thresholds - eliminates need for two discrete supervisors. |
| Guaranteed reset validity at low VCC | Reset output remains logic-valid down to VCC1 or VCC2 = 0.8V - prevents spurious release during power collapse. |
| Immunity to short VCC transients | Rejects <20µs negative glitches at ≥100mV overdrive - avoids false resets from switching noise or ESD. |
| Low quiescent current | 15µA typical ICC1 at 3.6V - extends battery life in portable equipment and reduces self-heating in sealed enclosures. |
| Industrial temperature range | –40°C to +125°C operation - supports deployment in motor drives, PLCs, and outdoor telecom hardware. |
Applications
| Telecom Power Management | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Monitoring primary 3.3V FPGA core rail and secondary 1.2V I/O rail in a 5G small cell radio unit. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting synchronized reset to FPGA and baseband processor during AC dropout or DC-DC failure. Use Value: Prevents configuration corruption by holding reset until both rails stabilize above 3.0V and 1.1V respectively, with 140ms timeout ensuring full FPGA reconfiguration. |
Use Scenario: Supervising 24V field-side supply (via resistor divider) and 5V logic supply in an isolated digital input module. IC Role / Device Role / Timing Role: Detecting undervoltage on both supplies and generating clean reset to ARM Cortex-M4 MCU and isolated RS-485 transceivers. Use Value: Enables fail-safe shutdown before analog front-end ADCs produce invalid readings due to marginal 5V rail. |
| Automotive Infotainment Head Unit | Medical Portable Monitor |
|
Use Scenario: Validating 5V main supply and 1.8V SoC core voltage in a dashboard display controller operating at 105°C ambient. IC Role / Device Role / Timing Role: Providing AEC-Q100-aligned supervision (per MAX6719AUTTWD1/V+T family qualification) with guaranteed reset down to 0.8V on either rail. Use Value: Meets ASIL-B functional safety requirements for power sequencing integrity during cold-crank events. |
Use Scenario: Ensuring reliable boot of a battery-powered ECG acquisition system using 3.3V MCU and 1.2V analog sensor rail. IC Role / Device Role / Timing Role: Monitoring dual supplies and asserting reset if either drops below 2.9V or 1.1V, preventing firmware execution on unstable power. Use Value: Eliminates risk of corrupted patient data capture by enforcing strict power-good qualification before ADC sampling begins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6717AUKYHD3+T | Open-drain RST output instead of push-pull; requires external pullup resistor. | Suitable where level-shifting or wired-OR reset bus is needed; incompatible with direct CMOS input drive. | Select when interfacing to bidirectional μP reset pins or sharing reset line with other open-drain sources. |
| TPS3808G33DBVR | Single-supply (3.3V only) supervisor with 200ms timeout; no VCC2 monitoring capability. | Lacks dual-rail supervision; requires separate IC for secondary rail monitoring. | Choose only for single-rail systems where cost-per-supply is prioritized over integration density. |
Compared with MAX6718AUKYHD3+T, the MAX6717AUKYHD3+T offers identical timing and thresholds but mandates external pullup, while TPS3808G33DBVR reduces integration by omitting VCC2 monitoring - making MAX6718AUKYHD3+T optimal for compact dual-rail designs requiring push-pull drive.
Availability
MAX6718AUKYHD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive infotainment systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-aligned reliability.
Supply support for MAX6718AUKYHD3+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 power management, sensing, and interface solutions.
The MAX6715A–MAX6729A family delivers integrated dual/triple-supply supervision in ultra-small SOT23 packages, targeting space-constrained embedded systems needing robust, low-power, wide-temperature power monitoring.
FAQ
What is the reset timeout period for MAX6718AUKYHD3+T?
The MAX6718AUKYHD3+T has a factory-trimmed minimum reset timeout period of 140ms (D3 suffix), guaranteed over –40°C to +125°C. This duration ensures sufficient hold time for processor initialization and memory stabilization after power-up or brownout recovery, and is fixed - not adjustable via external components.
Does MAX6718AUKYHD3+T support monitoring a third voltage rail?
No, MAX6718AUKYHD3+T does not include RSTIN or PFI functionality. It is a dual-supply supervisor only, monitoring VCC1 and VCC2. For triple-voltage monitoring, consider MAX6719AUKYHD3+T (with RSTIN) or MAX6728AUKYHD3+T (with PFI), both in the same SOT23-6 package family.
What is the function of Pin 6 on MAX6718AUKYHD3+T?
Pin 6 on MAX6718AUKYHD3+T is NC (No Connect) - it is not bonded internally and must be left unconnected on the PCB. This pin is reserved for variants with additional features (e.g., WDI or PFO) but serves no electrical purpose in the MAX6718AUKYHD3+T configuration.
Can MAX6718AUKYHD3+T operate with VCC2 lower than 0.9V?
Yes - while the typical VCC2 monitoring range is 0.9V to 3.3V, the MAX6718AUKYHD3+T is guaranteed to maintain valid reset logic as long as VCC2 ≥ 0.8V (or VCC1 ≥ 0.8V). Below 0.8V, reset behavior is not specified, and external pulldown may be required for deterministic low-state assurance.
Is MAX6718AUKYHD3+T pin-compatible with other MAX67xxA SOT23-6 variants?
MAX6718AUKYHD3+T shares the same SOT23-6 pinout (U6+1) with MAX6717A/MAX6719A/MAX6721A/MAX6725A/MAX6728A, but functional pin assignments differ: Pin 1 is RST (push-pull) here, whereas it is open-drain in MAX6717A and RSTIN in MAX6719A - direct replacement requires verification of signal compatibility.
MAX6718AUKYHD3+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:
- 1.313V, 2.188V
- 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
MAX6718AUKYHD3+T FAQ
1.How can I place an order for MAX6718AUKYHD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718AUKYHD3+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 MAX6718AUKYHD3+T reliable?
The price and inventory of MAX6718AUKYHD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718AUKYHD3+T is usually 5 days.
3.What payment methods are accepted for MAX6718AUKYHD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718AUKYHD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718AUKYHD3+T?
MAX6718AUKYHD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718AUKYHD3+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 MAX6718AUKYHD3+T?
For technical support, including MAX6718AUKYHD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718AUKYHD3+T requirements.
6.How does Aetrix verify that MAX6718AUKYHD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6718AUKYHD3+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 MAX6718AUKYHD3+T meets industry standards.
7.What is the process for return or replacement of MAX6718AUKYHD3+T?
All MAX6718AUKYHD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718AUKYHD3+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 MAX6718AUKYHD3+T part is unused and in its original packaging.
Return procedure for MAX6718AUKYHD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6718AUKYHD3+T Tags
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