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Analog Devices Inc./Maxim Integrated MAX6719UTSFD3+
- Part No.:
- MAX6719UTSFD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719UTSFD3+.pdf
- Description:
- MAX6719 TRIPLE, ULTRA-LOW-VOLTAG
- Quantity:
- Payment:
- Shipping:
Inventory:18,836
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Product details
Overview
MAX6719UTSFD3+ from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (adjustable third supply) with factory-trimmed thresholds of 4.625V and 3.075V, 210ms minimum reset timeout, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in multivoltage telecom and industrial systems for reliable power-up sequencing and brownout protection.
For engineers reviewing the MAX6719UTSFD3+ datasheet, MAX6719UTSFD3+ pinout, MAX6719UTSFD3+ application, or MAX6719UTSFD3+ equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), ultra-low 14µA typical supply current at 3.6V, RSTIN adjustable monitoring down to 0.626V, immunity to sub-20µs VCC transients, and compatibility with manual reset, watchdog, and power-fail signaling functions.
Technical Context
The MAX6719UTSFD3+ integrates three independent voltage comparators: one for VCC1 (4.625V nominal threshold), one for VCC2 (3.075V nominal), and one for RSTIN referenced to a 626.5mV internal bandgap. It uses a digital timeout counter to enforce a minimum 210ms reset assertion after all monitored supplies recover.
Its supervisory logic asserts active-low open-drain RST when any monitored voltage falls below its threshold, MR is pulled low, or no valid WDI transition occurs within 1.12s (normal mode) after initial 35s startup window. Reset remains asserted for the full timeout period regardless of subsequent voltage recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (±1.5% over -40°C to +85°C); ensures reliable reset assertion during 5V rail brownout |
| VCC2 Threshold | 3.075V (±1.5% over -40°C to +85°C); supports accurate monitoring of 3.3V I/O or core rails |
| RSTIN Threshold | 626.5mV (±2.5mV); enables precise external resistor-divider setup for third-supply monitoring down to 0.62V |
| Reset Timeout | 210ms (min); guarantees sufficient processor hold time during power stabilization |
| Supply Current | 14µA (typ at 3.6V); minimizes quiescent load on battery-backed or low-power systems |
| Reset Validity | Down to VCC1 or VCC2 = 0.8V; maintains correct reset state during deep undervoltage conditions |
| VCC Transient Immunity | Immune to negative-going glitches <20µs at 100mV overdrive; prevents spurious resets from noise |
Pinout & Package
MAX6719UTSFD3+ is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+ suffix). Pin 1 is marked with a dot; pin numbering follows standard SOT23 convention (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pullup; asserts when VCC1/VCC2/RSTIN drop or MR is pulled low |
| 2 | GND | Analog/digital ground reference; must be connected to system ground plane for stable comparator operation |
| 3 | MR | Active-low manual reset input; internal 50kΩ pullup to VCC1; 1µs minimum pulse width required for reset assertion |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers device core, VCC1 comparator, and RST output driver |
| 6 | RSTIN | Adjustable monitor input; high-impedance node referenced to 626.5mV internal reference; used for third-supply undervoltage detection |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneous VCC1 (4.625V), VCC2 (3.075V), and RSTIN (626.5mV-referenced) supervision eliminates need for discrete comparators |
| Adjustable third-voltage threshold | RSTIN supports external resistor-divider configuration for custom thresholds as low as 0.62V, enabling flexible auxiliary rail monitoring |
| Watchdog timer with dual-mode timeout | 35s startup window + 1.12s normal timeout allows safe boot completion before strict activity monitoring begins |
| Guaranteed reset validity at low VCC | Operates correctly with VCC1 or VCC2 ≥ 0.8V - critical for brownout recovery in energy-harvesting or backup-battery systems |
| Low-glitch sensitivity | Rejects VCC transients <20µs duration even with 100mV overdrive, reducing false resets in noisy power environments |
Applications
| Telecom Power Management | Industrial PLC Controller |
|---|---|
|
Use Scenario: Monitoring primary 4.8V DC-DC output, secondary 3.3V I/O rail, and auxiliary 1.2V FPGA core supply in a remote radio unit. IC Role / Device Role / Timing Role: Triple-voltage supervisor enforcing synchronized reset across all domains during AC loss or hot-swap events. Use Value: Prevents partial initialization by holding reset until all three rails stabilize above their respective thresholds for ≥210ms. |
Use Scenario: Ensuring deterministic startup of a dual-core ARM-based controller with separate 5V analog, 3.3V digital, and 1.8V memory rails. IC Role / Device Role / Timing Role: Centralized reset arbiter using RSTIN to monitor isolated 1.8V memory supply while VCC1/VCC2 track main rails. Use Value: Eliminates need for three discrete supervisors, saving PCB area and reducing BOM count in space-constrained DIN-rail modules. |
| Portable Medical Monitor | Network Switch ASIC Power Sequencing |
|
Use Scenario: Supervising battery-backed 3.6V main rail, 2.8V sensor interface rail, and 1.1V ADC reference rail in a handheld ECG device. IC Role / Device Role / Timing Role: Low-current (14µA typ) supervisor enabling >1-year shelf life while guaranteeing reset integrity down to 0.8V during battery depletion. Use Value: Maintains safe shutdown behavior even as battery voltage decays below 1.0V, preventing corrupted memory writes. |
Use Scenario: Coordinating power-up sequence of 12V front-end, 5V PHY, and 1.0V ASIC core in a managed Ethernet switch. IC Role / Device Role / Timing Role: Using RSTIN with external divider to monitor 1.0V core rail while VCC1/VCC2 track higher rails; MR tied to FPGA configuration complete signal. Use Value: Enables FPGA-controlled reset timing via MR, allowing dynamic adjustment of reset hold-off based on configuration status. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTSFD3+ | Same pinout and electrical specs, but push-pull RST output instead of open-drain; higher drive strength (800µA sink/source) | Required where active-high reset signaling or direct µP reset pin drive without external pullup is needed | Select MAX6720UTSFD3+ when interfacing to processors with unidirectional reset inputs requiring voltage-rail-compatible logic levels |
| TPS3808G33DBVR | Dual-supply only (VDD, VSENSE); no RSTIN input; fixed 3.3V threshold on VSENSE; 200ms timeout; 2.5µA quiescent current | Lacks third-supply monitoring capability; suited for simpler two-rail systems with ultra-low power priority | Choose TPS3808G33DBVR only if third-supply supervision is unnecessary and sub-3µA supply current is mandatory |
Compared with MAX6719UTSFD3+, MAX6720UTSFD3+ offers stronger reset drive but loses open-drain flexibility for wired-OR reset buses, while TPS3808G33DBVR reduces power consumption by 82% but sacrifices triple-monitoring capability and design adaptability for auxiliary rails.
Availability
MAX6719UTSFD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial control, and portable medical equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6719UTSFD3+ 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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6715–MAX6729 family delivers compact, ultra-low-power supervisory solutions optimized for multivoltage embedded systems where reliability, small footprint, and accurate threshold monitoring are critical.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6719UTSFD3+?
The MAX6719UTSFD3+ has factory-trimmed reset thresholds of 4.625V (VCC1) and 3.075V (VCC2), with ±1.5% tolerance over the full -40°C to +85°C operating range. These values are encoded in the "TS" suffix per Maxim's Reset Voltage Threshold Suffix Guide and are verified in the Electrical Characteristics table of the official datasheet.
Does the MAX6719UTSFD3+ support watchdog functionality?
No, the MAX6719UTSFD3+ does not include a watchdog input. Per Maxim's Selector Guide, only MAX6721 through MAX6729 variants integrate WDI functionality. The MAX6719UTSFD3+ provides triple-voltage supervision, manual reset (MR), and RSTIN-adjustable monitoring - but no watchdog timer.
What is the function of the RSTIN pin on the MAX6719UTSFD3+?
The RSTIN pin on the MAX6719UTSFD3+ is a high-impedance input referenced to an internal 626.5mV bandgap voltage. When the voltage at RSTIN falls below this threshold, the device asserts RST. It enables monitoring of a third supply via an external resistor divider - for example, setting a 1.2V trip point using R1 = 1.0MΩ and R2 = 523kΩ.
Is the MAX6719UTSFD3+ pin-compatible with other devices in the MAX6715–MAX6729 family?
Yes, the MAX6719UTSFD3+ shares the same 6-pin SOT23-6 package and pinout with MAX6715, MAX6716, MAX6719, MAX6720, MAX6721, MAX6722, MAX6723, and MAX6724. However, functional differences exist - e.g., MAX6719UTSFD3+ has open-drain RST and RSTIN, while MAX6720UTSFD3+ has push-pull RST and same RSTIN.
What is the minimum reset timeout period for the MAX6719UTSFD3+?
The MAX6719UTSFD3+ has a minimum reset timeout period of 210ms, as indicated by the "D3" suffix in its part number per Maxim's Reset Timeout Period Suffix Guide. This value is guaranteed over temperature and supply voltage variations and defines the minimum duration RST remains asserted after all monitored supplies recover.
MAX6719UTSFD3+ 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:
- Power Supply Monitor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.05V, 2.925V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6719UTSFD3+ FAQ
1.How can I place an order for MAX6719UTSFD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719UTSFD3+ 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 MAX6719UTSFD3+ reliable?
The price and inventory of MAX6719UTSFD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719UTSFD3+ is usually 5 days.
3.What payment methods are accepted for MAX6719UTSFD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719UTSFD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719UTSFD3+?
MAX6719UTSFD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719UTSFD3+ 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 MAX6719UTSFD3+?
For technical support, including MAX6719UTSFD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719UTSFD3+ requirements.
6.How does Aetrix verify that MAX6719UTSFD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6719UTSFD3+ 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 MAX6719UTSFD3+ meets industry standards.
7.What is the process for return or replacement of MAX6719UTSFD3+?
All MAX6719UTSFD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719UTSFD3+, 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 MAX6719UTSFD3+ part is unused and in its original packaging.
Return procedure for MAX6719UTSFD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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