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Analog Devices Inc./Maxim Integrated MAX6718AUKVHD3+
- Part No.:
- MAX6718AUKVHD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718AUKVHD3+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,450
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Product details
Overview
MAX6718AUKVHD3+ from Maxim Integrated is a dual-voltage microprocessor supervisory IC 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, 140ms minimum reset timeout, push-pull active-low RST output, and guaranteed valid reset operation down to VCC1 or VCC2 = 0.8V - used in telecom power sequencing and industrial embedded controllers.
For engineers reviewing the MAX6718AUKVHD3+ datasheet, MAX6718AUKVHD3+ pinout, MAX6718AUKVHD3+ application, or MAX6718AUKVHD3+ equivalent, this page delivers verified electrical specs, exact pin functions, dual-supply monitoring context, reset timing behavior, and real-world substitution guidance for multivoltage system design.
Technical Context
The MAX6718AUKVHD3+ 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 threshold. Its internal timer guarantees ≥140ms reset assertion after all supplies recover, with restart-on-fall behavior if voltage dips again during timeout.
This variant features push-pull RST output referenced to VCC1, manual-reset input (MR) with 50kΩ internal pullup, and no watchdog, RSTIN, PFI, or PFO functionality - distinguishing it from MAX6721A–MAX6729A family members with extended features.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (factory-trimmed, falling edge; ensures reliable reset at nominal 4.63V rail) |
| VCC2 Reset Threshold | 3.075V (factory-trimmed, falling edge; matches common 3.3V secondary rails) |
| Reset Timeout Period | 140ms min (D3 suffix; provides sufficient hold time for FPGA/CPU initialization sequences) |
| Supply Current | 14µA typ at 3.6V (enables battery-backed systems with multi-year standby life) |
| Operating Temperature | -40°C to +125°C (supports under-hood automotive and industrial control environments) |
| Reset Output Type | Push-pull active-low RST (no external pullup required; drives directly into μP reset pin) |
| Minimum Valid VCC | 0.8V (guaranteed reset logic state integrity during brownout recovery) |
Pinout & Package
Package: 5-pin SOT23 (2.9mm × 1.6mm × 1.1mm), RoHS-compliant, lead-free.
| 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 140ms min after recovery |
| 2 - GND | Ground reference | Common return for all internal comparators, timer, and output stage; must be low-impedance connection |
| 3 - MR | Manual-reset input | Active-low input with 50kΩ internal pullup to VCC1; forces reset when pulled ≤0.3×VCC1 and sustains reset for full timeout |
| 4 - VCC2 | Secondary supply input | Powers internal circuitry when > VCC1; monitored at 3.075V threshold; supports 0.8V–5.5V range |
| 5 - VCC1 | Primary supply input | Main power source and reference for RST output; monitored at 4.625V threshold; supports 0.8V–5.5V range |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (4.625V) and VCC2 (3.075V) supervision with separate comparators and hysteresis |
| Guaranteed reset validity at low VCC | Functional reset assertion and deassertion guaranteed even when VCC1 or VCC2 drops to 0.8V |
| Immunity to short VCC transients | Rejects negative-going glitches <20µs wide (at 100mV overdrive), preventing spurious resets in noisy power domains |
| Low quiescent current | 14µA typical supply current enables use in always-on subsystems without compromising battery life |
| Industrial temperature grade | -40°C to +125°C operation validated per AEC-Q100 stress testing protocols for reliability-critical applications |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Sequencing startup of dual-rail power supplies (4.63V core, 3.3V I/O) in base station RF front-end modules. IC Role / Device Role / Timing Role: Dual-supply monitor ensuring 4.63V rail stabilizes before enabling 3.3V domain and releasing CPU reset. Use Value: Prevents latch-up and configuration corruption by enforcing strict voltage-ordering with 140ms hold time. |
Use Scenario: Monitoring redundant 24V DC input and isolated 5V logic supply in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Independent comparator for primary and secondary rails, asserting reset if either fails during operation. Use Value: Enables fail-safe shutdown within 140ms of undervoltage detection, meeting SIL-2 functional safety requirements. |
| Automotive ADAS Camera ECU | Medical Infusion Pump Controller |
Use Scenario: Supervising 5V camera sensor supply and 1.8V image processor core in vision-based driver assistance systems. IC Role / Device Role / Timing Role: Dual-threshold supervisor validating both rails before releasing reset to SoC, with MR support for field diagnostics. Use Value: Ensures deterministic boot under cold-crank conditions where VCC1 may dip to 0.8V while maintaining reset integrity. |
Use Scenario: Monitoring main 12V battery-derived 5V supply and backup 3.3V supercapacitor rail in life-critical drug delivery hardware. IC Role / Device Role / Timing Role: Fail-safe reset generator with guaranteed operation down to 0.8V on either rail, supporting graceful shutdown. Use Value: Meets IEC 62304 Class C software safety requirements via deterministic power-fail response and brownout immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6716AUTLTD3+ | 6-pin SOT23; identical VCC1/VCC2 thresholds (4.625V/3.075V) and 140ms timeout, but open-drain RST output requiring external pullup | Suitable where board layout allows pullup resistor and bidirectional μP reset pins are used | Select when interfacing with legacy μPs requiring open-drain reset signaling or when PCB space permits external biasing |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); 200ms timeout; 1.4µA IQ; no VCC2 monitoring capability | Limited to single-rail systems; lacks dual-threshold architecture and MR input hysteresis | Choose only for cost-sensitive, single-voltage applications where secondary rail supervision is unnecessary |
Compared with MAX6718AUKVHD3+, MAX6716AUTLTD3+ offers identical voltage thresholds and timing but requires external pullup due to open-drain RST, while TPS3808G33DBVR reduces functionality to single-rail monitoring with lower IQ but no dual-supply coordination capability.
Availability
MAX6718AUKVHD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive ADAS ECUs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6718AUKVHD3+ 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 high-reliability industrial, automotive, and communications systems.
The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multivoltage embedded systems requiring guaranteed reset behavior down to 0.8V and robust noise immunity.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6718AUKVHD3+?
The MAX6718AUKVHD3+ has a factory-trimmed VCC1 reset threshold of 4.625V (±12.5mV) at the falling edge, corresponding to the 'V' suffix in the reset voltage code. This value is specified in the Electrical Characteristics table and guaranteed over -40°C to +125°C, with 20ppm/°C tempco and 0.5% hysteresis relative to threshold.
Does the MAX6718AUKVHD3+ support monitoring a third voltage rail?
No, the MAX6718AUKVHD3+ does not support third-rail monitoring. It is a dual-supply supervisor with dedicated VCC1 and VCC2 inputs only. Models like MAX6719A/MAX6720A include RSTIN for adjustable auxiliary voltage monitoring, but MAX6718AUKVHD3+ omits this pin and associated circuitry per its 5-pin SOT23 pinout and feature set.
What is the function of the MR pin on the MAX6718AUKVHD3+?
The MR (manual-reset) pin on the MAX6718AUKVHD3+ is an active-low input with a 50kΩ internal pullup to VCC1. Pulling MR ≤0.3×VCC1 asserts the RST output immediately and maintains reset for the full 140ms timeout period after MR returns high. It requires no external components and supports momentary switch interfaces for field service or test-mode resets.
Is the MAX6718AUKVHD3+ watchdog-capable?
No, the MAX6718AUKVHD3+ does not include watchdog functionality. It belongs to the MAX6717A/MAX6718A subgroup, which lacks WDI (watchdog input) and associated timer circuitry. Watchdog capability is present only in MAX6721A–MAX6729A and MAX6797A variants, identifiable by 6- or 8-pin packages and explicit WDI pin assignment.
What package type and dimensions does the MAX6718AUKVHD3+ use?
The MAX6718AUKVHD3+ uses a 5-pin SOT23 package (JEDEC MO-178AA), measuring 2.9mm × 1.6mm × 1.1mm with 0.95mm pitch. The 'UK' in the part number denotes this 5-pin variant, and the '+' suffix confirms RoHS-compliant, lead-free construction per Maxim's packaging standards.
MAX6718AUKVHD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.313V, 1.575V
- 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
MAX6718AUKVHD3+ FAQ
1.How can I place an order for MAX6718AUKVHD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718AUKVHD3+ 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 MAX6718AUKVHD3+ reliable?
The price and inventory of MAX6718AUKVHD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718AUKVHD3+ is usually 5 days.
3.What payment methods are accepted for MAX6718AUKVHD3+?
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4.How is shipping managed for MAX6718AUKVHD3+?
MAX6718AUKVHD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718AUKVHD3+ 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 MAX6718AUKVHD3+?
For technical support, including MAX6718AUKVHD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718AUKVHD3+ requirements.
6.How does Aetrix verify that MAX6718AUKVHD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6718AUKVHD3+ 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 MAX6718AUKVHD3+ meets industry standards.
7.What is the process for return or replacement of MAX6718AUKVHD3+?
All MAX6718AUKVHD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718AUKVHD3+, 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 MAX6718AUKVHD3+ part is unused and in its original packaging.
Return procedure for MAX6718AUKVHD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6718AUKVHD3+ Tags
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MIC826SYMT-TR
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