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Analog Devices Inc./Maxim Integrated MAX6718UKRVD3-T
- Part No.:
- MAX6718UKRVD3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6718UKRVD3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6718UKRVD3-T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, monitoring VCC1 (primary) and VCC2 (secondary) supply rails with factory-trimmed reset thresholds of 4.625V (VTH1) and 3.075V (VTH2), 210ms minimum reset timeout, push-pull active-low RST output, and manual reset input. It ensures reliable system boot and brownout recovery in low-power embedded controllers.
For engineers reviewing the MAX6718UKRVD3-T datasheet, MAX6718UKRVD3-T pinout, MAX6718UKRVD3-T application, or MAX6718UKRVD3-T equivalent, key selection criteria include dual-rail voltage monitoring range (1.8V–5.0V / 0.9V–3.3V), guaranteed reset validity down to VCC = 0.8V, ultra-low 14µA typical supply current at 3.6V, and compatibility with manual reset and push-pull reset interface requirements.
Technical Context
The MAX6718UKRVD3-T implements independent voltage comparators for VCC1 and VCC2 with ±1.5% threshold accuracy and 20ppm/°C tempco, asserting reset when either rail falls below its trimmed threshold. Its internal reset timeout timer guarantees minimum 210ms assertion after all monitored supplies recover.
It features a dedicated MR input with 50kΩ internal pullup to VCC1, 1µs minimum pulse width support, and 200ns MR-to-reset delay. The push-pull RST output is referenced to VCC1 and sinks up to 3.2mA at 4.5V while maintaining VOL ≤ 0.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, falling edge), enabling reliable supervision of 5V or 4.8V logic rails |
| VCC2 Threshold | 3.075V (factory-trimmed, falling edge), suitable for monitoring 3.3V I/O or auxiliary supplies |
| Reset Timeout | 210ms (min), ensuring sufficient hold time for CPU initialization and peripheral stabilization |
| Supply Current | 14µA (typ at 3.6V), minimizing quiescent power in battery-backed or always-on systems |
| Operating Temp | -40°C to +85°C, supporting industrial and telecom equipment deployment |
| Reset Validity | Guaranteed down to VCC1 or VCC2 = 0.8V, enabling robust operation during deep brownout conditions |
| Output Type | Push-pull active-low RST, eliminating need for external pullup and simplifying µP reset interface |
Pinout & Package
Package: 5-pin SOT23-5, 2.9mm × 1.6mm footprint, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts low on fault and holds for 210ms min after recovery |
| 2 | GND | Analog/digital ground reference for all internal comparators and timing circuits |
| 3 | MR | Active-low manual reset input with 50kΩ internal pullup to VCC1; 1µs minimum pulse width required |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets VTH2 = 3.075V |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers device core and sets VTH1 = 4.625V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of primary (VCC1) and secondary (VCC2) rails with separate thresholds and hysteresis |
| Factory-trimmed precision thresholds | VTH1 = 4.625V ±1.5%, VTH2 = 3.075V ±1.5%, eliminating external resistor calibration |
| Guaranteed reset validity at low VCC | Functional reset assertion and release guaranteed even when VCC1 or VCC2 drops to 0.8V |
| Immunity to short VCC transients | Withstands negative-going supply glitches ≤20µs (at 100mV overdrive), preventing spurious resets |
| Low-power push-pull reset driver | Eliminates external pullup resistor, reduces BOM count, and ensures fast VOL ≤ 0.4V at 3.2mA sink |
Applications
| Industrial PLC Controller | Network Router Power Management |
|---|---|
Use Scenario: Supervises 5V main logic rail and 3.3V I/O rail in DIN-rail mounted programmable logic controller with extended temperature operation. IC Role / Device Role / Timing Role: Dual-rail supervisor providing synchronized reset assertion on brownout of either supply, with 210ms timeout matching FPGA configuration time. Use Value: Prevents partial initialization and state corruption during unstable AC/DC converter output by holding reset until both rails stabilize above 4.625V and 3.075V respectively. | Use Scenario: Monitors primary 5V DC-DC output and secondary 3.3V PHY supply in fanless enterprise router operating 24/7. IC Role / Device Role / Timing Role: Fault-detection IC asserting hardware reset when either rail dips below threshold, interfacing directly to ARM Cortex-A9 reset pin via push-pull output. Use Value: Enables deterministic recovery from transient line disturbances without software intervention, reducing MTTR in carrier-grade infrastructure. |
| Medical Point-of-Care Monitor | Smart Energy Meter |
Use Scenario: Ensures safe boot sequence in battery-backed portable diagnostic device with dual Li-ion regulated outputs (5V analog front-end, 3.3V MCU core). IC Role / Device Role / Timing Role: System integrity guardian detecting undervoltage on either supply and forcing controlled restart before sensor data acquisition begins. Use Value: Guarantees reset remains asserted until both rails exceed thresholds and hold for full 210ms, eliminating race conditions between ADC reference settling and processor wake-up. | Use Scenario: Supervises isolated 5V metering rail and 3.3V communication module supply in ANSI C12.20-certified electricity meter with tamper detection. IC Role / Device Role / Timing Role: Hardware-level power monitor interfacing with metrology SoC reset pin and supporting manual reset via front-panel button. Use Value: Provides fail-safe reset coordination across safety-critical metering and RF subsystems, meeting IEC 62056-21 watchdog timing requirements. |
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 VTH1/VTH2 (4.625V/3.075V) and 210ms timeout, but open-drain RST output requiring external pullup | Suitable where board layout already includes pullup or where level-shifting to different voltage domain is needed | Select MAX6716UTLTD3-T only if open-drain flexibility or existing pullup network justifies larger 6-pin footprint |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only), 200ms timeout, 1.8µA IQ, SOT23-5, no MR input | Limited to single-rail monitoring; lacks manual reset and dual-threshold capability | Choose TPS3808G33DBVR only for cost-sensitive, single-rail designs where MR and VCC2 monitoring are unnecessary |
Compared with MAX6716UTLTD3-T and TPS3808G33DBVR, the MAX6718UKRVD3-T uniquely delivers dual-rail supervision with push-pull RST in the smallest 5-pin SOT23 package-reducing PCB area, eliminating pullup components, and enabling direct µP reset interface without contention risk.
Availability
MAX6718UKRVD3-T is available at Aetrix Electronics and suitable for industrial PLC controllers, network router power management, medical point-of-care monitors, smart energy meters, and telecom base station modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6718UKRVD3-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) 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 multivoltage embedded systems requiring compact, low-power, dual- or triple-rail supervision with factory-trimmed accuracy and guaranteed operation down to 0.8V supply.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6718UKRVD3-T?
The MAX6718UKRVD3-T has a factory-trimmed VCC1 reset threshold of 4.625V (minimum 4.500V, maximum 4.750V) on the falling edge, as defined by the "L" suffix in its part number per Maxim's Reset Voltage Threshold Suffix Guide. This value is guaranteed over -40°C to +85°C and enables precise supervision of 5V logic rails without external calibration. The MAX6718UKRVD3-T uses this threshold to assert reset whenever VCC1 drops below 4.625V.
Does the MAX6718UKRVD3-T support manual reset functionality?
Yes, the MAX6718UKRVD3-T includes an active-low manual reset (MR) input on Pin 3, featuring a 50kΩ internal pullup to VCC1. A logic-low pulse ≥1µs on MR forces the RST output low for the full 210ms timeout period, regardless of VCC1/VCC2 status. This allows external buttons or control logic to initiate system reset. The MAX6718UKRVD3-T requires no external pullup, and MR can be left unconnected if unused.
What is the package type and pin count of the MAX6718UKRVD3-T?
The MAX6718UKRVD3-T is housed in a 5-pin SOT23-5 package (2.9mm × 1.6mm), with pins assigned as follows: Pin 1 = RST (push-pull active-low), Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = VCC1. This compact footprint supports high-density PCB layouts and automated assembly. The MAX6718UKRVD3-T shares the same physical dimensions as industry-standard SOT23-5 devices.
How does the MAX6718UKRVD3-T ensure reset validity during deep brownout conditions?
The MAX6718UKRVD3-T guarantees correct reset output logic state even when VCC1 or VCC2 falls as low as 0.8V - a critical feature for systems experiencing severe supply sag. Its internal biasing and comparator design maintain functional integrity down to this level, ensuring reset remains asserted until recovery. This behavior is validated across temperature and process corners. The MAX6718UKRVD3-T leverages this to prevent premature release of reset during marginal power conditions.
What are the key electrical differences between MAX6718UKRVD3-T and MAX6716UTLTD3-T?
The MAX6718UKRVD3-T (5-pin SOT23) and MAX6716UTLTD3-T (6-pin SOT23) share identical VTH1/VTH2 (4.625V/3.075V) and 210ms timeout, but differ in output architecture: MAX6718UKRVD3-T uses push-pull RST (no external pullup needed), while MAX6716UTLTD3-T uses open-drain RST (requires external pullup). The MAX6718UKRVD3-T saves board space and simplifies interface, whereas MAX6716UTLTD3-T offers voltage-level flexibility.
MAX6718UKRVD3-T 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:
- 1.575V, 2.625V
- 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
MAX6718UKRVD3-T FAQ
1.How can I place an order for MAX6718UKRVD3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6718UKRVD3-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 MAX6718UKRVD3-T reliable?
The price and inventory of MAX6718UKRVD3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6718UKRVD3-T is usually 5 days.
3.What payment methods are accepted for MAX6718UKRVD3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6718UKRVD3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6718UKRVD3-T?
MAX6718UKRVD3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6718UKRVD3-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 MAX6718UKRVD3-T?
For technical support, including MAX6718UKRVD3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6718UKRVD3-T requirements.
6.How does Aetrix verify that MAX6718UKRVD3-T is sourced from the original manufacturer or authorized distributors?
All MAX6718UKRVD3-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 MAX6718UKRVD3-T meets industry standards.
7.What is the process for return or replacement of MAX6718UKRVD3-T?
All MAX6718UKRVD3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6718UKRVD3-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 MAX6718UKRVD3-T part is unused and in its original packaging.
Return procedure for MAX6718UKRVD3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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