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Analog Devices Inc./Maxim Integrated MAX6718UKSYD3
- Part No.:
- MAX6718UKSYD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718UKSYD3.pdf
- Description:
- IC SUPERVISOR UP SUP CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:2,148
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Product details
Overview
MAX6718UKSYD3 from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, monitoring VCC1 (primary supply) at 3.075V threshold and VCC2 (secondary supply) at 2.925V threshold with 210ms reset timeout. It features push-pull active-low RST output, manual-reset input (MR), and guaranteed reset validity down to VCC1 or VCC2 = 0.8V. Used in portable battery-operated equipment for reliable power-up sequencing and brownout protection.
For engineers reviewing the MAX6718UKSYD3 datasheet, MAX6718UKSYD3 pinout, MAX6718UKSYD3 application, or MAX6718UKSYD3 equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), ultra-low 14µA typical supply current at 3.6V, immunity to sub-100ns VCC transients, and operation across -40°C to +125°C industrial temperature range.
Technical Context
The MAX6718UKSYD3 integrates two independent voltage comparators with factory-trimmed thresholds-VTH1 = 3.075V (S-suffix) and VTH2 = 2.925V (S-suffix)-and a precision 210ms (D3-suffix) reset timeout timer. Its push-pull RST output is referenced to VCC1 and asserts low when either supply falls below its threshold or MR is pulled low.
It guarantees valid reset logic state with VCC1 ≥ 0.8V or VCC2 ≥ 0.8V, uses internal 50kΩ MR pullup, and exhibits 20ppm/°C reset threshold tempco. No watchdog, RSTIN, PFI/PFO, or WDI functionality is present-this variant is strictly dual-supply, fixed-threshold, push-pull RST with manual reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V ±1.5% - sets primary supply brownout detection point for 3.3V I/O rails |
| VCC2 Threshold | 2.925V ±1.5% - sets secondary supply detection for 3.0V core or analog supplies |
| Reset Timeout | 210ms (min) - ensures µP reset hold time exceeds boot ROM initialization latency |
| Supply Current | 14µA (typ) at 3.6V - enables >10-year battery life in always-on monitoring applications |
| Operating Temp | -40°C to +125°C - supports under-hood automotive and industrial control environments |
| Reset Output | Push-pull, active-low, VCC1-referenced - eliminates external pullup and simplifies µP interface |
| MR Input | Internal 50kΩ pullup to VCC1 - allows direct switch-to-GND connection without external components |
Pinout & Package
Package: 5-pin SOT23 (UK package code), 1.6mm × 1.6mm × 0.95mm body, gull-wing leads, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; sinks 3.2mA at VCC1 ≥ 4.5V; no external pullup required |
| 2 - GND | Ground reference | Common return for all internal comparators, timer, and output stage; must be low-impedance |
| 3 - MR | Manual-reset input | Active-low; internally pulled up to VCC1 at 50kΩ; 1µs minimum pulse width; 100ns glitch rejection |
| 4 - VCC2 | Secondary supply input | Powers internal VCC2 comparator and sets VTH2 = 2.925V; valid from 0.8V to 5.5V |
| 5 - VCC1 | Primary supply input | Powers device core and sets VTH1 = 3.075V; also references RST output and MR pullup |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply monitoring | Simultaneous VCC1/VCC2 supervision avoids cascaded failure modes in multi-rail systems |
| Factory-trimmed precision thresholds | VTH1 = 3.075V and VTH2 = 2.925V with ±1.5% tolerance eliminates external resistor calibration |
| Guaranteed reset validity to 0.8V | Ensures deterministic reset assertion even during deep brownout conditions before full power collapse |
| Ultra-low quiescent current | 14µA typical ICC1 at 3.6V enables use in energy-harvesting and coin-cell-powered devices |
| Industrial temperature grade | -40°C to +125°C operation supports deployment in harsh environments without derating |
Applications
| Portable Medical Sensors | Battery-Powered IoT Nodes |
|---|---|
Use Scenario: Wearable ECG sensor operating from single Li-ion cell with 3.3V LDO (VCC1) and 3.0V analog front-end rail (VCC2). IC Role / Device Role / Timing Role: Dual-supply supervisor ensuring both rails are stable before releasing µP reset and enabling analog acquisition. Use Value: Prevents corrupted ADC readings or firmware lockup caused by asymmetric rail sequencing or partial brownout. | Use Scenario: LPWAN node using ARM Cortex-M0+ MCU, powered by CR2032 coin cell with 3.3V boost converter (VCC1) and 3.0V sensor bias rail (VCC2). IC Role / Device Role / Timing Role: Reset coordinator asserting hold until both regulated rails exceed 2.925V/3.075V and maintaining 210ms reset pulse for safe MCU boot. Use Value: Eliminates need for discrete RC reset circuits, reduces BOM count by 3 components, and improves cold-start reliability at -20°C. |
| Industrial PLC I/O Modules | Automotive Body Control Units |
Use Scenario: DIN-rail mounted I/O module with isolated 3.3V communication rail (VCC1) and 2.8V FPGA configuration rail (VCC2), exposed to 85°C ambient. IC Role / Device Role / Timing Role: High-temp-stable dual supervisor guaranteeing reset remains asserted if either rail dips below threshold during thermal stress or load transients. Use Value: Meets IEC 61000-4-4 EFT immunity requirements via 100ns MR glitch rejection and transient-immune comparator design. | Use Scenario: BCM controlling door locks and lighting, supplied from 12V battery via dual DC-DC: 3.3V infotainment rail (VCC1) and 2.9V CAN transceiver rail (VCC2). IC Role / Device Role / Timing Role: Fail-safe monitor detecting undervoltage on either rail during cranking (battery dip to 6V) and holding reset until both recover. Use Value: Prevents CAN bus arbitration errors or unintended actuator activation during engine start transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3V VCC1 threshold only; no VCC2 monitoring; 200ms timeout; 1.6µA IQ | Single-rail systems only; unsuitable for dual-supply validation | Select only when monitoring one supply and ultra-low IQ is critical |
| ADM6706ARZ-REEL | 3.08V VCC1 threshold; no VCC2 input; 240ms timeout; open-drain RST; 15µA IQ | Lacks secondary supply monitoring; requires external pullup; not pin-compatible | Choose for legacy designs needing same footprint as older ADM67xx series |
Compared with TPS3808G33DBVR and ADM6706ARZ-REEL, MAX6718UKSYD3 uniquely provides simultaneous dual-rail monitoring with matched thresholds (3.075V/2.925V) and push-pull RST in a 5-pin SOT23, eliminating external components while supporting true multi-voltage system integrity checks.
Availability
MAX6718UKSYD3 is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT nodes, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6718UKSYD3 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 power, sensing, and interface applications in industrial, automotive, and computing markets.
The MAX6715A–MAX6729A family delivers ultra-low-voltage, multi-rail supervisory circuits optimized for space-constrained, battery-sensitive systems where deterministic power-on reset and brownout recovery are mission-critical.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6718UKSYD3?
The MAX6718UKSYD3 has factory-trimmed reset thresholds of VTH1 = 3.075V (S-suffix) for VCC1 and VTH2 = 2.925V (S-suffix) for VCC2, with ±1.5% tolerance over -40°C to +125°C. These values are laser-trimmed during production and do not require external resistor networks - the MAX6718UKSYD3 implements them as fixed, precision thresholds.
Does the MAX6718UKSYD3 include a watchdog timer or power-fail input?
No, the MAX6718UKSYD3 does not include watchdog timer (WDI), power-fail input (PFI), power-fail output (PFO), or adjustable RSTIN functionality. It is a minimal dual-supply supervisor variant with only VCC1, VCC2, MR, RST, and GND pins - confirmed by its 5-pin SOT23 package and MAX6717A/MAX6718A product grouping in the datasheet selector guide.
What is the reset timeout period of the MAX6718UKSYD3 and how is it set?
The MAX6718UKSYD3 has a fixed reset timeout period of 210ms (minimum), denoted by the D3 suffix in its part number. This value is internally programmed and unadjustable - no external capacitor or resistor is needed. The timeout begins when VCC1 and VCC2 rise above their respective thresholds and ends 210ms after both remain valid.
Can the MAX6718UKSYD3 operate with VCC1 and VCC2 supplied from different voltage sources?
Yes, the MAX6718UKSYD3 is designed for independent VCC1 and VCC2 supplies: VCC1 powers the core logic and references the RST output, while VCC2 powers only its dedicated comparator. Both inputs accept 0.8V to 5.5V, allowing use with mismatched rails - e.g., VCC1 = 3.3V (I/O) and VCC2 = 2.8V (core) - with no interaction between supply domains beyond threshold comparison.
Is the RST output of the MAX6718UKSYD3 push-pull or open-drain, and what are its drive capabilities?
The MAX6718UKSYD3 features a push-pull RST output referenced to VCC1. It can sink up to 3.2mA at VCC1 ≥ 4.5V (VOL ≤ 0.4V) and source 800µA while maintaining VOH ≥ 0.8 × VCC1. This eliminates the need for an external pullup resistor and ensures fast, rail-to-rail reset signaling compatible with modern µP reset inputs.
MAX6718UKSYD3 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:
- Power Supply Monitor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.188V, 2.925V
- 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
MAX6718UKSYD3 FAQ
1.How can I place an order for MAX6718UKSYD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718UKSYD3 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 MAX6718UKSYD3 reliable?
The price and inventory of MAX6718UKSYD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718UKSYD3 is usually 5 days.
3.What payment methods are accepted for MAX6718UKSYD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718UKSYD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718UKSYD3?
MAX6718UKSYD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718UKSYD3 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 MAX6718UKSYD3?
For technical support, including MAX6718UKSYD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718UKSYD3 requirements.
6.How does Aetrix verify that MAX6718UKSYD3 is sourced from the original manufacturer or authorized distributors?
All MAX6718UKSYD3 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 MAX6718UKSYD3 meets industry standards.
7.What is the process for return or replacement of MAX6718UKSYD3?
All MAX6718UKSYD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718UKSYD3, 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 MAX6718UKSYD3 part is unused and in its original packaging.
Return procedure for MAX6718UKSYD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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