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Analog Devices Inc./Maxim Integrated MAX6716UTZWD3
- Part No.:
- MAX6716UTZWD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6716UTZWD3.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,462
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Product details
Overview
The MAX6716UTZWD3 from Maxim Integrated is a dual-voltage microprocessor supervisory IC in 6-pin SOT23 package, monitoring VCC1 (4.625V threshold) and VCC2 (3.075V threshold) with push-pull active-low RST output, 210ms reset timeout, and integrated watchdog timer. It guarantees valid reset assertion down to VCC1 or VCC2 = 0.8V and draws only 14µA typical supply current at 3.6V - used in telecom power sequencing, industrial controller brownout protection, and battery-backed embedded systems.
For engineers reviewing the MAX6716UTZWD3 datasheet, MAX6716UTZWD3 pinout, MAX6716UTZWD3 application, or MAX6716UTZWD3 equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over -40°C to +125°C), watchdog startup delay (35s min), immunity to sub-20µs VCC transients, and guaranteed operation at ultra-low supply voltage (0.8V).
Technical Context
This device implements two independent voltage comparators with factory-trimmed thresholds (VTH1 = 4.625V, VTH2 = 3.075V), a digital reset timeout counter, and a dual-mode watchdog timer with long startup (35s min) and short normal mode (1.12s min). The internal reference for RSTIN/PFI is 626.5mV ±15mV, enabling precise auxiliary voltage monitoring via external resistor dividers.
Reset logic is synchronized to both VCC1 and VCC2 supply domains: RST asserts low when either supply falls below its threshold, MR is pulled low, or WDI times out; it remains asserted for the full 210ms timeout after all conditions recover. Push-pull RST output is referenced to VCC1 and sinks up to 3.2mA at 4.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±1.5% over temp - sets primary supply brownout detection point) |
| VCC2 Threshold | 3.075V (factory-trimmed, ±1.5% over temp - sets secondary supply fault detection level) |
| Reset Timeout | 210ms (minimum guaranteed duration - ensures µP completes boot before release) |
| Watchdog Period | 35s startup / 1.12s normal (dual-mode timing - accommodates complex boot sequences then tight runtime supervision) |
| Supply Current | 14µA typical at 3.6V (ultra-low quiescent draw - extends battery life in portable equipment) |
| Operating Temp | -40°C to +125°C (full automotive/industrial range - supports under-hood and factory-floor deployment) |
| Reset Valid Down To | VCC1 or VCC2 ≥ 0.8V (guaranteed logic state integrity - enables reliable reset during deep brownout) |
Pinout & Package
Package: 6-pin SOT23, surface-mount, RoHS-compliant, 1.6mm × 2.9mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull, referenced to VCC1; asserts low on fault and holds for 210ms; drives µP reset pin directly without pullup |
| 2 - GND | Ground reference | Common return for all internal comparators, timers, and outputs; must be low-impedance connection |
| 3 - MR | Manual-reset input | Active-low, internally pulled up to VCC1 (50kΩ); pulse <1µs sufficient to trigger full 210ms reset |
| 4 - VCC2 | Secondary supply input | Powers internal VCC2 comparator and RST2 logic; monitors 3.075V threshold; valid down to 0.8V |
| 5 - VCC1 | Primary supply input | Powers core logic and RST output; monitors 4.625V threshold; defines VOH/ VOL levels for RST |
| 6 - WDI | Watchdog input | Edge-sensitive; resets watchdog timer on rising/falling transition; unconnected = watchdog disabled |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (4.625V) and VCC2 (3.075V) supervision eliminates need for two discrete supervisors |
| Guaranteed reset validity at 0.8V | Ensures deterministic reset behavior during severe brownout - critical for fail-safe industrial shutdown |
| Dual-mode watchdog timer | 35s initial window allows full system boot; 1.12s runtime interval catches software hangs without false triggers |
| Immunity to short VCC transients | Rejects glitches <20µs wide even with 100mV overdrive - prevents spurious resets in noisy power environments |
| Low 14µA supply current | Enables always-on supervision in battery-powered IoT nodes with multi-year operational lifetime |
Applications
| Telecom Power Sequencing | Industrial PLC Brownout Protection |
|---|---|
Use Scenario: Monitoring primary 5V and secondary 3.3V rails in base station power management unit during AC line sag. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting reset within 20µs of VCC1 drop below 4.625V, holding for 210ms to prevent partial firmware execution. Use Value: Prevents corrupted memory writes and latch-up during transient undervoltage events common in outdoor telecom cabinets. |
Use Scenario: Detecting undervoltage on 24V DC input and 5V logic rail in programmable logic controller during factory floor voltage dip. IC Role / Device Role / Timing Role: Simultaneous VCC1/VCC2 monitoring with 210ms timeout ensures safe I/O state freeze before CPU reset. Use Value: Eliminates uncontrolled relay chatter and sensor misreads during 100–500ms brownouts typical in industrial power distribution. |
| Portable Medical Device Safety | Automotive Infotainment Boot Integrity |
Use Scenario: Supervising lithium-ion battery voltage (VCC1) and regulated 3.3V MCU supply (VCC2) in handheld ultrasound probe. IC Role / Device Role / Timing Role: Ultra-low 14µA current draw and 0.8V reset validity enable continuous supervision during sleep mode without draining battery. Use Value: Guarantees immediate reset if battery drops below 3.2V while maintaining >5-year shelf life on single charge. |
Use Scenario: Validating 5V main supply and 3.3V SoC core rail during cold-cranking (6–8V battery dip) in vehicle infotainment head unit. IC Role / Device Role / Timing Role: Dual-threshold detection with 210ms hold time synchronizes reset with bootloader readiness window. Use Value: Avoids boot failure or display artifacts caused by premature release of reset during unstable crank voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6716UTTVD3 | Same dual-threshold (4.625V/3.075V), same 6-pin SOT23, but open-drain RST output requiring external pullup | Suitable where µP reset pin is bidirectional or requires wired-OR configuration with other reset sources | Select when system-level reset bus sharing or level-shifting is required; not drop-in for push-pull RST designs |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only), no VCC2 input, no watchdog, 200ms timeout, 1.5µA current | Limited to single-rail monitoring; lacks secondary supply supervision and watchdog functionality | Choose only for cost-sensitive, single-rail applications where dual monitoring and watchdog are unnecessary |
Compared with MAX6716UTZWD3, MAX6716UTTVD3 offers identical voltage thresholds and timing but requires external pullup and lacks watchdog capability, while TPS3808G33DBVR reduces cost and current but sacrifices dual-supply coverage and system-level fault detection robustness.
Availability
MAX6716UTZWD3 is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC brownout protection, and portable medical device safety requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for MAX6716UTZWD3 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, dual/triple-supply supervision with integrated watchdog and manual reset - engineered specifically for high-reliability embedded systems operating across -40°C to +125°C.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6716UTZWD3?
The MAX6716UTZWD3 has factory-trimmed reset thresholds of 4.625V for VCC1 and 3.075V for VCC2, with ±1.5% tolerance over the full -40°C to +125°C temperature range. These values are fixed by the part number suffix 'TZ' per Maxim's Reset Voltage Threshold Suffix Guide and do not require external resistor programming.
Does the MAX6716UTZWD3 support watchdog functionality, and what are its timing modes?
Yes, the MAX6716UTZWD3 includes a dual-mode watchdog timer: a 35s minimum startup period after any reset event (power-up, MR, or watchdog timeout), followed by a 1.12s minimum normal-mode timeout. The watchdog is enabled by connecting WDI to a processor I/O line and disabled by leaving WDI floating.
What is the reset timeout period for the MAX6716UTZWD3, and is it adjustable?
The MAX6716UTZWD3 has a fixed 210ms minimum reset timeout period, set by the 'D3' suffix in the part number per Maxim's Reset Timeout Period Suffix Guide. This value is factory-programmed and not user-adjustable via external components or pins.
Can the MAX6716UTZWD3 monitor a third voltage, and how is that implemented?
No, the MAX6716UTZWD3 is a dual-supply supervisor and does not include the RSTIN input required for third-voltage monitoring. That feature is present only in variants like MAX6719A/MAX6720A (suffix 'U' or 'V'). The MAX6716UTZWD3 monitors only VCC1 and VCC2.
What output type does the MAX6716UTZWD3 use for its reset signal, and what are its drive capabilities?
The MAX6716UTZWD3 uses a push-pull active-low RST output referenced to VCC1. It can sink up to 3.2mA at 4.5V VCC1 and provides VOH ≥ 0.8×VCC1 when deasserted - enabling direct connection to most µP reset inputs without external pullup resistors.
MAX6716UTZWD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.665V, 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-23-6
MAX6716UTZWD3 FAQ
1.How can I place an order for MAX6716UTZWD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6716UTZWD3 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 MAX6716UTZWD3 reliable?
The price and inventory of MAX6716UTZWD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6716UTZWD3 is usually 5 days.
3.What payment methods are accepted for MAX6716UTZWD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6716UTZWD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6716UTZWD3?
MAX6716UTZWD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6716UTZWD3 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 MAX6716UTZWD3?
For technical support, including MAX6716UTZWD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6716UTZWD3 requirements.
6.How does Aetrix verify that MAX6716UTZWD3 is sourced from the original manufacturer or authorized distributors?
All MAX6716UTZWD3 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 MAX6716UTZWD3 meets industry standards.
7.What is the process for return or replacement of MAX6716UTZWD3?
All MAX6716UTZWD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6716UTZWD3, 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 MAX6716UTZWD3 part is unused and in its original packaging.
Return procedure for MAX6716UTZWD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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