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Analog Devices Inc./Maxim Integrated MAX6718UKYHD3
- Part No.:
- MAX6718UKYHD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718UKYHD3.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,110
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Product details
Overview
The MAX6718UKYHD3 from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, monitoring VCC1 (primary supply) and VCC2 (secondary supply) with factory-trimmed reset thresholds of 4.625V and 3.075V respectively, 210ms minimum reset timeout, push-pull active-low RST output, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in telecom power management and industrial embedded controllers.
For engineers reviewing the MAX6718UKYHD3 datasheet, MAX6718UKYHD3 pinout, MAX6718UKYHD3 application, or MAX6718UKYHD3 equivalent, key selection criteria include dual-supply threshold accuracy, reset timeout stability over -40°C to +125°C, low 14µA typical supply current at 3.6V, immunity to sub-100ns VCC transients, and compatibility with manual-reset and watchdog-disabled configurations.
Technical Context
This device implements independent voltage comparators for VCC1 and VCC2 with 0.5% hysteresis and 20ppm/°C tempco, asserting reset when either supply falls below its trimmed threshold. The internal timer guarantees ≥210ms reset assertion after all supplies recover, with restart-on-fall behavior if voltage dips again before timeout completion.
It features a push-pull RST output referenced to VCC1, internal 50kΩ MR pullup, and no WDI or RSTIN/PFI functionality - confirmed by its suffix "YH" (dual-threshold, push-pull RST, no watchdog/manual-reset enhancements beyond base configuration) and "D3" (210ms timeout). No auxiliary inputs are bonded or enabled in this variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±125mV tolerance; sets primary supply brownout detection point) |
| VCC2 Threshold | 3.075V (factory-trimmed, ±75mV tolerance; sets secondary supply undervoltage detection) |
| Reset Timeout | 210ms min (guaranteed assertion duration after recovery; ensures µP full initialization) |
| Supply Current | 14µA typ at 3.6V (enables battery-backed or ultra-low-power systems without compromising supervision) |
| Operating Temp | -40°C to +125°C (supports under-hood automotive, industrial PLC, and telecom base station deployment) |
| Reset Validity | Down to VCC1 or VCC2 = 0.8V (ensures deterministic reset state during deep brownout or startup ramp) |
| Output Type | Push-pull active-low RST (no external pullup required; drives directly into µP reset pin with rail-to-rail logic levels) |
Pinout & Package
MAX6718UKYHD3 is housed in a 5-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), surface-mount, RoHS-compliant, with thermal pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; asserts low on VCC1/VCC2 fault and holds for 210ms min after recovery |
| 2 - GND | Ground reference | Common return for all internal comparators, timer, and output stage; must be low-impedance connection |
| 3 - MR | Active-low manual-reset input | Internally pulled up to VCC1 (50kΩ); pulling low forces reset for full 210ms timeout regardless of supply status |
| 4 - VCC2 | Secondary supply input | Powers internal VCC2 comparator and enables secondary threshold monitoring at 3.075V |
| 5 - VCC1 | Primary supply input | Main power source and reference for RST output; powers VCC1 comparator set to 4.625V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (4.625V) and VCC2 (3.075V) supervision eliminates need for two discrete supervisors or resistor-divider networks |
| Guaranteed reset validity to 0.8V | Ensures deterministic reset assertion even during severe brownout conditions where VCC drops near ground |
| 210ms minimum reset timeout | Provides sufficient hold time for complex µP boot sequences, flash initialization, and peripheral configuration |
| 14µA typical supply current | Reduces standby power in always-on systems such as remote sensors and battery-buffered controllers |
| Immunity to short VCC transients | Rejects glitches <100ns wide at >100mV overdrive, preventing spurious resets in noisy power environments |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring dual DC-DC outputs (5V core, 3.3V I/O) in LTE base station power tree during hot-swap insertion and thermal stress. IC Role / Device Role / Timing Role: Dual-supply supervisor enforcing synchronized reset across FPGA, DSP, and transceiver ICs upon any rail collapse. Use Value: Prevents partial initialization and metastability by holding reset until both rails stabilize above 4.625V and 3.075V for ≥210ms. | Use Scenario: Supervising isolated 24V field bus supply and 5V logic rail in modular PLC backplane with extended temperature cycling. IC Role / Device Role / Timing Role: Fault detector triggering hard reset of ARM Cortex-M7 controller when either supply deviates beyond spec during vibration or ESD events. Use Value: Guarantees reset remains asserted down to 0.8V per rail, enabling fail-safe shutdown before logic corruption occurs. |
| Medical Diagnostic Imaging | Automotive ADAS Camera Module |
Use Scenario: Validating dual imaging sensor supplies (1.8V analog, 3.3V digital) in portable ultrasound unit with battery backup and cold-start capability. IC Role / Device Role / Timing Role: Brownout protector ensuring FPGA-based image processor only boots when both supplies meet precision thresholds. Use Value: Leverages 0.5% hysteresis and 20ppm/°C tempco to maintain threshold accuracy across -20°C to +70°C operating range. | Use Scenario: Monitoring 5V camera sensor supply and 1.2V SoC core rail in rear-view camera module exposed to under-hood thermal extremes. IC Role / Device Role / Timing Role: High-reliability supervisor meeting AEC-Q100 Grade 1 requirements via -40°C to +125°C operation and glitch-immune reset generation. Use Value: 14µA supply current extends battery runtime during parking mode while maintaining full supervision coverage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6718UKYHD5 | Same dual-threshold (4.625V/3.075V), same package, but 560ms min reset timeout instead of 210ms | Suitable for systems requiring longer reset hold time (e.g., multi-stage bootloaders or high-latency memory initialization) | Select MAX6718UKYHD5 only if extended timeout is required; otherwise MAX6718UKYHD3 provides optimal balance of speed and reliability |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only), SOT23-5, 200ms timeout, 1.6µA quiescent current - lacks VCC2 monitoring capability | Applicable only where secondary supply supervision is unnecessary or handled externally | Choose TPS3808G33DBVR for cost-sensitive single-rail designs; MAX6718UKYHD3 is mandatory when dual-rail coordination is required |
Compared with MAX6718UKYHD5 and TPS3808G33DBVR, the MAX6718UKYHD3 uniquely delivers factory-trimmed dual-threshold supervision with 210ms timeout in a space-constrained SOT23-5, making it the only option that satisfies simultaneous 4.625V/3.075V detection, push-pull drive, and industrial temperature compliance without design compromise.
Availability
MAX6718UKYHD3 is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC I/O modules, and medical diagnostic imaging systems requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6718UKYHD3 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.
The MAX6715A–MAX6729A family delivers ultra-low-voltage µP supervisory circuits optimized for dual/triple supply monitoring in space- and power-constrained systems operating from -40°C to +125°C.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6718UKYHD3?
The MAX6718UKYHD3 has factory-trimmed reset thresholds of 4.625V for VCC1 (±125mV) and 3.075V for VCC2 (±75mV), as defined by the "YH" suffix in its ordering code and confirmed in Maxim's Reset Voltage Threshold Suffix Guide. These values are measured at TA = +25°C and exhibit 20ppm/°C tempco over the full -40°C to +125°C range. The MAX6718UKYHD3 does not support adjustable thresholds or RSTIN/PFI inputs.
Does the MAX6718UKYHD3 include watchdog timer functionality?
No, the MAX6718UKYHD3 does not include watchdog timer functionality. Its suffix "YH" indicates dual-threshold supervision with push-pull RST output and 210ms timeout, but explicitly excludes WDI (watchdog input) - a feature reserved for variants with "W", "X", or "Z" in the suffix (e.g., MAX6721A). The MAX6718UKYHD3 relies solely on voltage monitoring and manual reset (MR) for fault response.
What is the function of Pin 3 (MR) on the MAX6718UKYHD3, and how should it be used?
Pin 3 (MR) on the MAX6718UKYHD3 is an active-low manual-reset input with internal 50kΩ pullup to VCC1. Pulling MR low forces immediate reset assertion for the full 210ms timeout period, independent of VCC1/VCC2 status. If unused, MR may be left floating (relying on internal pullup) or tied to VCC1. It accepts CMOS-level signals and rejects <100ns glitches, making it suitable for front-panel reset buttons or test-mode control lines.
Can the MAX6718UKYHD3 monitor a third supply voltage such as a battery backup rail?
No, the MAX6718UKYHD3 cannot monitor a third supply voltage. It is a dual-supply supervisor with dedicated VCC1 and VCC2 inputs only. Variants with RSTIN or PFI inputs (e.g., MAX6719A, MAX6728A) support auxiliary monitoring, but the MAX6718UKYHD3's pinout and internal bonding omit these terminals. For triple-voltage supervision, select MAX6719AUTLTD3 or MAX6728AUKYHD3 instead.
What are the absolute maximum ratings for VCC1 and VCC2 on the MAX6718UKYHD3?
The MAX6718UKYHD3 has absolute maximum ratings of -0.3V to +6V for both VCC1 and VCC2 pins. Operation outside this range risks permanent damage. The device is specified to function correctly with VCC1 and VCC2 between 0.8V and 5.5V, and reset output validity is guaranteed down to 0.8V - critical for brownout resilience. Exceeding 5.5V violates recommended operating conditions even if below absolute max.
MAX6718UKYHD3 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:
- 1.313V, 2.188V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6718UKYHD3 FAQ
1.How can I place an order for MAX6718UKYHD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718UKYHD3 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 MAX6718UKYHD3 reliable?
The price and inventory of MAX6718UKYHD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718UKYHD3 is usually 5 days.
3.What payment methods are accepted for MAX6718UKYHD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718UKYHD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718UKYHD3?
MAX6718UKYHD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718UKYHD3 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 MAX6718UKYHD3?
For technical support, including MAX6718UKYHD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718UKYHD3 requirements.
6.How does Aetrix verify that MAX6718UKYHD3 is sourced from the original manufacturer or authorized distributors?
All MAX6718UKYHD3 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 MAX6718UKYHD3 meets industry standards.
7.What is the process for return or replacement of MAX6718UKYHD3?
All MAX6718UKYHD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718UKYHD3, 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 MAX6718UKYHD3 part is unused and in its original packaging.
Return procedure for MAX6718UKYHD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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