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Analog Devices Inc./Maxim Integrated MAX6718UKZGD3
- Part No.:
- MAX6718UKZGD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718UKZGD3.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,263
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Product details
Overview
MAX6718UKZGD3 from Maxim Integrated is a dual-voltage microprocessor supervisory IC in 5-pin SOT23 package, monitoring VCC1 (1.62V threshold) and VCC2 (0.788V threshold) with 210ms reset timeout, push-pull active-low RST output, and guaranteed reset validity down to VCC = 0.8V. It supports battery-powered embedded systems requiring reliable power-up sequencing and brownout detection.
For engineers reviewing the MAX6718UKZGD3 datasheet, MAX6718UKZGD3 pinout, MAX6718UKZGD3 application, or MAX6718UKZGD3 equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), ultra-low 14µA supply current at 3.6V, immunity to sub-20µs VCC transients, and compatibility with 1.2V–5.0V core/I/O rail combinations in space-constrained industrial and telecom designs.
Technical Context
The MAX6718UKZGD3 integrates two independent voltage comparators with factory-trimmed thresholds (VTH1 = 1.62V, VTH2 = 0.788V), a 210ms monostable reset timer, and push-pull RST output referenced to VCC1. Its internal logic guarantees valid reset assertion even when either VCC1 or VCC2 drops to 0.8V - enabling operation during deep brownout conditions.
No watchdog, manual-reset, or power-fail inputs are implemented in this variant (suffix D3 indicates timeout only; no WDI, MR, PFI/PFO pins enabled). The device uses a single internal reference (626mV) for both thresholds and exhibits 20ppm/°C tempco and 0.5% hysteresis relative to typical VTH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 1.62V (min), 1.575V (typ), 1.53V (max) - sets primary supply brownout detection point for 1.8V I/O rails |
| VCC2 Threshold | 0.788V (min), 0.765V (typ), 0.765V (max) - enables monitoring of 0.9V core supplies with margin |
| Reset Timeout | 140ms (min), 210ms (typ), 280ms (max) - ensures µP initialization completes before release |
| Supply Current | 14µA (typ) at 3.6V - minimizes quiescent load on battery or low-power DC-DC outputs |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Reset Propagation | 20µs (max) from VCC drop to RST assertion - fast enough to prevent µP corruption during rapid transients |
| Output Type | Push-pull active-low RST - eliminates need for external pullup; drives directly into µP reset pin |
Pinout & Package
MAX6718UKZGD3 is housed in a 5-pin SOT23 package (2.8mm × 2.9mm × 1.3mm), optimized for high-density PCB layouts. Pin 1 is marked with dot; pin numbering follows standard SOT23 convention (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-low reset output | Push-pull driver referenced to VCC1; asserts low on VCC1/VCC2 undervoltage; holds for 210ms timeout |
| 2 (GND) | Ground reference | Common return for all internal comparators, timer, and output stage; must be low-impedance |
| 3 (MR) | Manual-reset input | Not connected internally in MAX6718UKZGD3 - pin is NC; leave unconnected or tie to VCC1 |
| 4 (VCC2) | Secondary supply input | Powers internal VCC2 comparator and sets secondary threshold (0.788V); accepts 0.8V–5.5V |
| 5 (VCC1) | Primary supply input | Powers device core and sets primary threshold (1.62V); source for RST output drive; accepts 0.8V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of 1.8V I/O (VCC1) and 0.9V core (VCC2) rails without external components |
| Guaranteed reset validity to 0.8V | Ensures deterministic reset behavior during severe brownout - critical for fail-safe embedded firmware |
| Ultra-low quiescent current | 14µA typ at 3.6V enables >10-year battery life in always-on IoT sensor nodes |
| High noise immunity | Immunity to VCC transients <20µs duration prevents spurious resets in electrically noisy industrial settings |
| Factory-trimmed precision thresholds | ±1.5% total error (initial + tempco + hysteresis) eliminates calibration overhead in production test |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Monitoring 1.8V CAN transceiver supply and 0.9V microcontroller core voltage in harsh under-dash environments. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting synchronized reset across communication and processing domains during battery voltage sag. Use Value: Prevents CAN bus lockup and MCU state corruption by guaranteeing reset remains asserted until both rails stabilize above thresholds for ≥210ms. | Use Scenario: Power sequencing for infotainment SoC with separate 1.8V GPU I/O and 0.9V CPU core supplies. IC Role / Device Role / Timing Role: Ensures GPU and CPU power domains meet timing margins before boot ROM execution begins. Use Value: Eliminates need for discrete RC reset circuits - reduces BOM count and improves thermal stability vs. resistor-capacitor solutions. |
| Medical Portable Diagnostic Devices | 5G Small Cell Remote Radio Units |
Use Scenario: Supervising battery-backed 1.8V memory interface and 0.9V ADC/DSP core in handheld ultrasound units. IC Role / Device Role / Timing Role: Provides fail-safe reset during Li-ion discharge below 3.0V, where VCC1/VCC2 both decay simultaneously. Use Value: 0.8V minimum operating voltage allows full reset functionality down to end-of-battery-life, extending usable runtime. | Use Scenario: Monitoring 1.8V FPGA configuration supply and 0.9V RFIC bias rails in thermally stressed outdoor base stations. IC Role / Device Role / Timing Role: Detects simultaneous undervoltage on digital and analog domains to trigger graceful shutdown before data corruption. Use Value: 125°C rating and 20ppm/°C tempco maintain threshold accuracy across -40°C to +85°C ambient with 40°C delta-T rise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G16DBVR | Single-supply monitor (1.6V threshold only); requires external resistor network for second rail; 200ms timeout | Lacks native dual-rail support - adds design complexity and board area for VCC2 sensing | Select when only one supply needs supervision or when cost sensitivity outweighs integration benefit |
| ADM6718AKSZ-REEL7 | Same dual-threshold architecture but 140ms timeout (D2 suffix); ±2% threshold accuracy; 25µA ICC | Slightly looser threshold tolerance and higher current - less suitable for ultra-low-power battery apps | Choose when tighter 140ms timing window is required and 11µA extra current is acceptable |
Compared with TPS3808G16DBVR and ADM6718AKSZ-REEL7, MAX6718UKZGD3 delivers true integrated dual-rail supervision in a 5-pin SOT23 with best-in-class 14µA supply current and guaranteed 0.8V operation - making it optimal for compact, battery-critical, and high-reliability embedded systems.
Availability
MAX6718UKZGD3 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body controllers, portable medical devices, 5G radio units, and battery-powered edge sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6718UKZGD3 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 supervisory circuits targeting space-constrained, multi-rail embedded systems where reliability during brownout and minimal quiescent power are mandatory.
FAQ
What is the exact reset threshold voltage for VCC1 on MAX6718UKZGD3?
The MAX6718UKZGD3 has a factory-trimmed VCC1 reset threshold of 1.62V (minimum), 1.575V (typical), and 1.53V (maximum) over -40°C to +125°C. This corresponds to the 'Z' suffix in the part number per Maxim's Reset Voltage Threshold Suffix Guide, and is specified for falling VCC1 transitions with 0.5% hysteresis relative to typical value.
Does MAX6718UKZGD3 support manual reset or watchdog functionality?
No. MAX6718UKZGD3 is a fixed-function dual-supply supervisor with no manual-reset (MR), watchdog input (WDI), or power-fail (PFI/PFO) capability. These pins are not bonded out or internally connected - confirmed by the pin description table showing MR as NC and absence of WDI/PFI functions in the ordering matrix for UKZGD3.
What is the reset timeout period of MAX6718UKZGD3 and how is it set?
The MAX6718UKZGD3 has a reset timeout period of 140ms (minimum), 210ms (typical), and 280ms (maximum), set by the 'D3' suffix per Maxim's Reset Timeout Period Suffix Guide. This monostable period begins when VCC1 or VCC2 rises above its respective threshold and ensures the RST output remains asserted for the full duration before deassertion.
Can MAX6718UKZGD3 monitor a 1.2V supply as VCC2?
Yes. MAX6718UKZGD3 accepts VCC2 input from 0.8V to 5.5V, and its 0.788V threshold is designed to supervise 0.9V cores - providing 212mV of margin above threshold for a 1.2V rail. However, the device will assert reset only if VCC2 falls below 0.788V; for 1.2V supervision, a different threshold variant (e.g., 'T' suffix = 1.2V) would be required.
Is MAX6718UKZGD3 compatible with 1.0V logic interfaces?
No. MAX6718UKZGD3 requires minimum VCC1 or VCC2 ≥ 0.8V to guarantee valid reset output, but its push-pull RST output is referenced to VCC1 and swings from GND to VCC1. Driving a 1.0V logic interface requires VCC1 ≥ 1.0V; operation at VCC1 = 0.8V yields VOL ≤ 0.3V and VOH ≥ 0.8 × VCC1 = 0.64V - insufficient for reliable 1.0V logic high recognition.
MAX6718UKZGD3 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:
- 1.11V, 2.313V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6718UKZGD3 FAQ
1.How can I place an order for MAX6718UKZGD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718UKZGD3 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 MAX6718UKZGD3 reliable?
The price and inventory of MAX6718UKZGD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718UKZGD3 is usually 5 days.
3.What payment methods are accepted for MAX6718UKZGD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718UKZGD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718UKZGD3?
MAX6718UKZGD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718UKZGD3 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 MAX6718UKZGD3?
For technical support, including MAX6718UKZGD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718UKZGD3 requirements.
6.How does Aetrix verify that MAX6718UKZGD3 is sourced from the original manufacturer or authorized distributors?
All MAX6718UKZGD3 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 MAX6718UKZGD3 meets industry standards.
7.What is the process for return or replacement of MAX6718UKZGD3?
All MAX6718UKZGD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718UKZGD3, 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 MAX6718UKZGD3 part is unused and in its original packaging.
Return procedure for MAX6718UKZGD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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