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Analog Devices Inc./Maxim Integrated MAX6718UKWGD3+
- Part No.:
- MAX6718UKWGD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718UKWGD3+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,719
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Product details
Overview
MAX6718UKWGD3+ from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, monitoring VCC1 (1.62V threshold) and VCC2 (0.788V threshold) with push-pull active-low reset output, 210ms minimum reset timeout, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in multivoltage embedded systems requiring reliable power-on reset and brownout detection.
For engineers reviewing the MAX6718UKWGD3+ datasheet, MAX6718UKWGD3+ pinout, MAX6718UKWGD3+ application, or MAX6718UKWGD3+ equivalent, key selection factors include its dual-supply monitoring capability, factory-trimmed thresholds, push-pull RST output referenced to VCC1, low 14µA typical supply current at 3.6V, and -40°C to +85°C industrial temperature range.
Technical Context
The MAX6718UKWGD3+ integrates two independent voltage comparators for primary (VCC1) and secondary (VCC2) supply monitoring, with internal reference trimming ensuring ±1.5% threshold accuracy over temperature. Its reset logic asserts RST low when either supply falls below its factory-set threshold and holds for a fixed 210ms (min) timeout after recovery.
This device uses BiCMOS process technology (1072 transistors), features immunity to sub-20µs VCC transients, and guarantees valid reset state even as VCC1 or VCC2 drops to 0.8V - enabling robust operation during deep brownouts without external support circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 1.62V (typ), factory-trimmed W-suffix; ensures precise 1.62V brownout detection on primary rail |
| VCC2 Reset Threshold | 0.788V (typ), factory-trimmed D-suffix; enables reliable monitoring of ultra-low secondary rails like 0.9V core supplies |
| Reset Timeout Period | 210ms (min), D3-suffix; provides sufficient hold time for full µP initialization and peripheral stabilization |
| Supply Current | 14µA (typ) at 3.6V; minimizes quiescent power draw in battery-operated and always-on systems |
| Operating Temperature | -40°C to +85°C; qualified for industrial and telecom equipment deployment without derating |
| Reset Output Type | Push-pull active-low RST referenced to VCC1; eliminates need for external pullup and supports direct µP reset pin drive |
| Minimum Valid VCC | 0.8V on VCC1 or VCC2; guarantees correct reset assertion during severe undervoltage conditions |
Pinout & Package
MAX6718UKWGD3+ is housed in a 5-pin SOT23-5 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead-free (+T suffix), with gull-wing leads and standard JEDEC MO-178AC footprint.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; drives µP reset pin directly without pullup resistor |
| 2 | GND | Analog/digital ground reference; must be connected to system ground plane for stable comparator operation |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC1; debounced by design, accepts TTL/CMOS levels |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets RST2 reference if enabled |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers device core, references RST output, and sets primary threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (1.62V) and VCC2 (0.788V) supervision with separate comparators and hysteresis |
| Guaranteed reset validity at low VCC | Functional reset assertion guaranteed even when VCC1 or VCC2 drops to 0.8V - critical for brownout resilience |
| Push-pull RST output | Eliminates external pullup requirement and reduces BOM count; compatible with bidirectional µP reset I/O via 4.7kΩ series resistor |
| Low supply current | 14µA typical at 3.6V enables >10-year battery life in coin-cell-powered IoT sensors and portable devices |
| Transient immunity | Immune to VCC glitches <20µs duration - prevents spurious resets during switching noise or ESD events |
Applications
| Industrial PLC Power Sequencing | Telecom Line Card Voltage Monitoring |
|---|---|
|
Use Scenario: Monitoring 3.3V I/O and 1.2V FPGA core rails during cold start and hot-swap insertion in modular telecom line cards. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset until both rails stabilize above 3.3V and 1.2V thresholds. Use Value: Prevents FPGA configuration corruption and I/O bus contention by enforcing 210ms minimum reset hold time after rail convergence. |
Use Scenario: Ensuring clean boot of ARM-based baseband processors in 4G/5G small cells powered by multi-rail DC/DC converters. IC Role / Device Role / Timing Role: Primary (VCC1) monitors 1.8V processor supply; secondary (VCC2) monitors 0.9V DDR PHY supply. Use Value: Factory-trimmed 1.62V/0.788V thresholds match exact rail tolerances, eliminating calibration overhead in production test. |
| Medical Infusion Pump Controller | POS Terminal Power Management |
|
Use Scenario: Supervising battery-backed 3.3V MCU and 1.8V display controller rails in Class II medical devices with strict safety reset requirements. IC Role / Device Role / Timing Role: Guarantees reset remains asserted while either rail dips below threshold during battery switchover or load transients. Use Value: 0.8V minimum operating VCC ensures fail-safe reset assertion even during deep battery discharge (<2.0V). |
Use Scenario: Managing power-up sequencing and brownout response in retail point-of-sale terminals using Li-ion backup and 5V main supply. IC Role / Device Role / Timing Role: VCC1 monitors 5V main rail; VCC2 monitors 3.3V logic rail; MR input enables hardware-initiated firmware update reset. Use Value: Internal 50kΩ MR pullup simplifies front-panel button interface - no external resistor needed for momentary switch to GND. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6716UTLTD3-T | Same 6-pin SOT23 package, identical 1.62V/0.788V thresholds and 210ms timeout, but open-drain RST output | Requires external pullup resistor; less suitable for direct µP reset pin drive without series limiting | Select MAX6716UTLTD3-T only if open-drain flexibility (e.g., wired-OR reset buses) is required over push-pull simplicity |
| TPS3808G16DBVR | Single-supply monitor (1.6V threshold), 200ms timeout, 1.5µA quiescent current, SOT23-5 package | Lacks VCC2 monitoring; cannot replace dual-rail supervision without adding second IC | Choose TPS3808G16DBVR only for cost-sensitive single-rail applications where secondary supply monitoring is omitted |
Compared with MAX6716UTLTD3-T and TPS3808G16DBVR, the MAX6718UKWGD3+ uniquely delivers dual-rail supervision in a 5-pin push-pull configuration - reducing PCB area, eliminating pullup components, and enabling direct µP interface without signal contention risk.
Availability
MAX6718UKWGD3+ is available at Aetrix Electronics and suitable for industrial PLC power sequencing, telecom line card voltage monitoring, and medical infusion pump controller designs requiring stable component supply across extended product lifecycles.
Supply support for MAX6718UKWGD3+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX6715–MAX6729 family was designed specifically for space-constrained multivoltage systems needing reliable, low-power, factory-trimmed supervision - targeting applications where discrete solutions or larger supervisors would compromise size or reliability.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6718UKWGD3+?
The MAX6718UKWGD3+ has a factory-trimmed VCC1 reset threshold of 1.62V (typical), with tolerance of ±1.5% over temperature, as defined by the 'W' suffix in its part number per Maxim's Reset Voltage Threshold Suffix Guide. This value is measured under standard conditions (TA = +25°C, VCC1 = 3.6V) and remains stable across the full -40°C to +85°C operating range due to integrated tempco compensation.
Does the MAX6718UKWGD3+ support monitoring a third voltage rail?
No, the MAX6718UKWGD3+ is a dual-voltage supervisor and does not include RSTIN or PFI inputs. It monitors only VCC1 and VCC2. For triple-voltage monitoring, consider MAX6719UKWGD3+ (with RSTIN) or MAX6728KAUFD3+ (with PFI/PFO), both of which share the same threshold and timeout specifications but add auxiliary input capability.
What is the function of Pin 3 (MR) on the MAX6718UKWGD3+?
Pin 3 (MR) is the active-low manual reset input with an internal 50kΩ pullup resistor to VCC1. Pulling MR low forces an immediate reset assertion for the full 210ms timeout period, regardless of VCC1/VCC2 status. It accepts TTL/CMOS logic levels and requires no external debounce - a simple momentary switch to GND suffices for field-service or test-mode reset initiation.
Can the MAX6718UKWGD3+ operate with VCC1 = 1.5V?
No - the MAX6718UKWGD3+ requires VCC1 ≥ 1.8V for guaranteed operation per datasheet Absolute Maximum Ratings and Electrical Characteristics. While reset output validity is guaranteed down to VCC1 = 0.8V, the device itself will not power up or function correctly below 1.8V. Operating at 1.5V violates the specified minimum supply voltage and may result in undefined behavior or failure to assert reset.
Is the MAX6718UKWGD3+ pin-compatible with other MAX67xx SOT23-5 variants?
Yes - all MAX6717/MAX6718 variants in SOT23-5 (e.g., MAX6717UKTVD3+, MAX6718UKWGD3+) share identical 5-pin pinout and footprint. However, functional differences exist: MAX6717UKTVD3+ has open-drain RST, while MAX6718UKWGD3+ has push-pull RST. Swapping requires verifying reset output drive strength and external circuit compatibility.
MAX6718UKWGD3+ 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:
- 1.11V, 1.665V
- 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
MAX6718UKWGD3+ FAQ
1.How can I place an order for MAX6718UKWGD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718UKWGD3+ 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 MAX6718UKWGD3+ reliable?
The price and inventory of MAX6718UKWGD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718UKWGD3+ is usually 5 days.
3.What payment methods are accepted for MAX6718UKWGD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718UKWGD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718UKWGD3+?
MAX6718UKWGD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718UKWGD3+ 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 MAX6718UKWGD3+?
For technical support, including MAX6718UKWGD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718UKWGD3+ requirements.
6.How does Aetrix verify that MAX6718UKWGD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6718UKWGD3+ 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 MAX6718UKWGD3+ meets industry standards.
7.What is the process for return or replacement of MAX6718UKWGD3+?
All MAX6718UKWGD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718UKWGD3+, 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 MAX6718UKWGD3+ part is unused and in its original packaging.
Return procedure for MAX6718UKWGD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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