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Analog Devices Inc./Maxim Integrated MAX6718UKYHD3+T
- Part No.:
- MAX6718UKYHD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718UKYHD3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,101
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Product details
Overview
MAX6718UKYHD3+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, monitoring VCC1 (primary) and VCC2 (secondary) supplies with factory-trimmed thresholds of 2.125V (VTH1) and 2.125V (VTH2), 210ms minimum reset timeout, and push-pull active-low RST output. It guarantees valid reset assertion down to VCC1 or VCC2 = 0.8V and draws only 14µA typical supply current at 3.6V - used in portable battery-operated equipment requiring reliable power-up sequencing and brownout detection.
For engineers reviewing the MAX6718UKYHD3+T datasheet, MAX6718UKYHD3+T pinout, MAX6718UKYHD3+T application, or MAX6718UKYHD3+T equivalent, key selection criteria include dual-supply threshold matching (2.125V/2.125V), 210ms reset timeout, push-pull RST drive capability, guaranteed operation at 0.8V supply, and SOT23-5 footprint compatibility for space-constrained embedded designs.
Technical Context
The MAX6718UKYHD3+T implements two independent voltage comparators with ±0.5% typical threshold hysteresis and 20ppm/°C tempco, each feeding a shared reset timeout timer. Its push-pull RST output is referenced to VCC1 and sinks up to 3.2mA at 4.5V, eliminating external pull-up requirements.
It includes an internal 50kΩ pull-up on MR (manual reset input), supports glitch rejection (100ns), and asserts reset within 20µs of VCC1 or VCC2 crossing threshold - all while maintaining functional validity down to 0.8V on either supply rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.125V (typ), factory-trimmed Y suffix - ensures precise reset at core logic supply undervoltage |
| VCC2 Threshold | 2.125V (typ), factory-trimmed Y suffix - matches I/O supply monitoring for balanced dual-rail systems |
| Reset Timeout | 210ms (min), D3 suffix - provides sufficient hold time for slow-start DC/DC converters and FPGA configuration |
| Supply Current | 14µA (typ) at 3.6V - enables multi-year battery life in always-on sensor nodes and wearables |
| Operating Temp | -40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
| Reset Output Type | Push-pull active-low RST - drives directly into µP reset pin without external pull-up resistor |
| Valid Reset Down To | VCC1 or VCC2 ≥ 0.8V - maintains deterministic reset state during deep brownout conditions |
Pinout & Package
MAX6718UKYHD3+T is housed in a 5-pin SOT23-5 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+T suffix), with gull-wing leads optimized for automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; asserts low on VCC1/VCC2 undervoltage, MR low, or timeout expiration |
| 2 - GND | Ground reference | Common return path for all internal comparators, timer, and output stage; must be low-impedance |
| 3 - MR | Manual reset input | Active-low input with internal 50kΩ pull-up to VCC1; 1µs minimum pulse width; 100ns glitch rejection |
| 4 - VCC2 | Secondary supply input | Powers internal circuitry when > VCC1; input for VCC2 threshold comparator (2.125V) |
| 5 - VCC1 | Primary supply input | Powers internal circuitry when > VCC2; input for VCC1 threshold comparator (2.125V); references RST output |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (1.58–4.63V) and VCC2 (0.79–3.08V) supervision with separate thresholds - eliminates need for discrete comparators in multirail systems |
| Guaranteed reset validity at 0.8V | Functional reset assertion even when VCC1 or VCC2 drops to 0.8V - critical for graceful shutdown during battery depletion |
| Push-pull RST output | No external pull-up required; 3.2mA sink capability at 4.5V - simplifies PCB layout and reduces BOM count |
| Low quiescent current | 14µA typical at 3.6V - extends battery life in portable medical devices and IoT edge sensors |
| Immunity to short VCC transients | Rejects <20µs negative glitches below threshold - prevents spurious resets in electrically noisy industrial environments |
Applications
| Portable Battery-Powered Devices | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Power management in handheld test equipment with dual Li-ion cell (8.4V nominal) and LDO-regulated 3.3V/1.8V rails. IC Role / Device Role / Timing Role: Dual-supply supervisor ensuring synchronized reset across processor, memory, and analog front-end during battery sag or charger disconnect. Use Value: Prevents firmware corruption by holding µP in reset until both 3.3V and 1.8V rails stabilize post-power-up, leveraging 210ms timeout and 0.8V validity floor. |
Use Scenario: Fieldbus interface module operating in factory automation with 24V DC input, isolated 5V/3.3V supplies, and ESD-prone signal lines. IC Role / Device Role / Timing Role: Fault-detection monitor for primary 5V logic rail and secondary 3.3V FPGA configuration rail under voltage transients. Use Value: Guarantees clean reset initiation during 24V supply dips (e.g., motor startup), using 2.125V thresholds matched to actual rail tolerances and push-pull RST for robust noise immunity. |
| Network Edge Routers | Medical Diagnostic Handhelds |
Use Scenario: Compact 5G small-cell baseband unit with multiple DC/DC converters powering SoC, RF transceivers, and PHY interfaces. IC Role / Device Role / Timing Role: Centralized power-good arbiter verifying stable 1.2V core and 3.3V I/O before releasing system reset. Use Value: Enables deterministic boot sequence via 210ms timeout aligned with slowest converter ramp time, while 14µA ICC avoids unnecessary load on standby power rail. |
Use Scenario: Ultrasound probe with rechargeable battery, ultra-low-power MCU, and analog beamforming ASIC requiring fail-safe initialization. IC Role / Device Role / Timing Role: Brownout protector for 3.3V MCU supply and 1.8V sensor interface supply during battery discharge cycles. Use Value: Maintains valid reset state down to 0.8V per rail - allowing controlled shutdown before data loss occurs, critical for HIPAA-compliant patient record integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6718UTYHD3-T | Same thresholds (2.125V/2.125V), same 210ms timeout, but leaded (non-RoHS) SOT23-6 package with open-drain RST and no MR pin | Lacks manual reset input and requires external pull-up; incompatible pinout and packaging for lead-free production | Select MAX6718UKYHD3+T for RoHS compliance, push-pull RST, and MR support in SOT23-5 footprint |
| TPS3808G18DBVR | Single-supply (1.8V threshold only), 200ms timeout, open-drain RST, 2.5µA ICC - no VCC2 monitoring or MR input | Only monitors one rail; cannot replace dual-threshold function without adding external components | Choose only if system uses single regulated rail and lowest possible quiescent current is prioritized over dual monitoring |
Compared with MAX6718UTYHD3-T and TPS3808G18DBVR, the MAX6718UKYHD3+T uniquely delivers dual-rail supervision, push-pull RST, manual reset, and RoHS-compliant SOT23-5 in one device - reducing board area and eliminating external components required by alternatives.
Availability
MAX6718UKYHD3+T is available at Aetrix Electronics and suitable for portable battery-operated equipment, industrial PLC I/O modules, and network edge routers requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX6718UKYHD3+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, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.
The MAX6715–MAX6729 family delivers ultra-low-voltage dual/triple supervisory circuits targeting space-constrained, battery-sensitive embedded systems needing guaranteed reset behavior across wide supply ranges.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6718UKYHD3+T?
The MAX6718UKYHD3+T has factory-trimmed reset thresholds of 2.125V (typ) for both VCC1 and VCC2, indicated by the 'Y' suffix in the part number. This value is specified with ±37.5mV tolerance (2.088V to 2.163V) at +25°C and exhibits 20ppm/°C temperature coefficient - enabling precise coordination between core and I/O supply monitoring without external calibration.
Does the MAX6718UKYHD3+T support manual reset functionality, and how is it implemented?
Yes, the MAX6718UKYHD3+T includes an active-low manual reset input (MR) on Pin 3, featuring an internal 50kΩ pull-up resistor to VCC1. A logic-low pulse ≥1µs on MR forces RST low for the full 210ms timeout period after MR returns high. This allows field technicians or host firmware to initiate controlled system resets without power cycling - a key feature absent in many competing single-rail supervisors.
What is the reset output type of the MAX6718UKYHD3+T, and why does it matter for PCB design?
The MAX6718UKYHD3+T features a push-pull active-low RST output (Pin 1), eliminating the need for an external pull-up resistor. This reduces BOM cost and PCB area versus open-drain alternatives, while providing stronger drive capability (3.2mA sink at 4.5V) for direct interfacing with µP reset pins - especially valuable in high-noise industrial environments where weak pull-ups could cause marginal reset timing.
How low can the supply voltage go while still guaranteeing valid reset operation for the MAX6718UKYHD3+T?
The MAX6718UKYHD3+T guarantees correct reset output logic state down to VCC1 or VCC2 = 0.8V - significantly lower than most competitors (typically ≥1.0V). This ensures deterministic reset assertion during deep battery discharge or severe line sags, preventing undefined µP states that could corrupt memory or cause latch-up in downstream logic - a critical reliability feature for portable medical and military-grade equipment.
Is the MAX6718UKYHD3+T compatible with standard SOT23-5 footprints, and what are its thermal characteristics?
Yes, the MAX6718UKYHD3+T uses the industry-standard 5-pin SOT23-5 package (2.9mm × 1.6mm) with 0.95mm pitch gull-wing leads, fully compatible with automated pick-and-place and reflow processes. Its maximum power dissipation is 571mW at +70°C (derating 7.1mW/°C above), and junction temperature is rated to +150°C - supporting reliable operation in sealed enclosures or high-ambient industrial settings without forced airflow.
MAX6718UKYHD3+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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6718UKYHD3+T FAQ
1.How can I place an order for MAX6718UKYHD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718UKYHD3+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 MAX6718UKYHD3+T reliable?
The price and inventory of MAX6718UKYHD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718UKYHD3+T is usually 5 days.
3.What payment methods are accepted for MAX6718UKYHD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718UKYHD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718UKYHD3+T?
MAX6718UKYHD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718UKYHD3+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 MAX6718UKYHD3+T?
For technical support, including MAX6718UKYHD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718UKYHD3+T requirements.
6.How does Aetrix verify that MAX6718UKYHD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6718UKYHD3+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 MAX6718UKYHD3+T meets industry standards.
7.What is the process for return or replacement of MAX6718UKYHD3+T?
All MAX6718UKYHD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718UKYHD3+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 MAX6718UKYHD3+T part is unused and in its original packaging.
Return procedure for MAX6718UKYHD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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