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Analog Devices Inc./Maxim Integrated MAX6719AUTRVD3+T
- Part No.:
- MAX6719AUTRVD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719AUTRVD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,673
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Product details
Overview
MAX6719AUTRVD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with factory-trimmed reset thresholds, 140ms minimum reset timeout, and RSTIN input for adjustable third-voltage monitoring down to 0.62V. It asserts active-low push-pull reset when either supply drops below threshold and maintains reset for ≥140ms after recovery - used in telecom power sequencing and battery-backed industrial controllers.
For engineers reviewing the MAX6719AUTRVD3+T datasheet, MAX6719AUTRVD3+T pinout, MAX6719AUTRVD3+T application, or MAX6719AUTRVD3+T equivalent, key selection criteria include guaranteed reset validity down to VCC1/VCC2 = 0.8V, 14μA typical supply current at 3.6V, push-pull RST output referenced to VCC1, and compatibility with manual-reset, watchdog, and power-fail monitoring functions.
Technical Context
The MAX6719AUTRVD3+T implements dual independent voltage comparators with internal 20ppm/°C tempco references and 0.5% hysteresis, feeding a digital reset timeout timer with fixed 140ms (D3 suffix) delay. Its RSTIN input uses a precision 626.5mV internal reference to support externally adjustable third-supply monitoring via resistor divider.
It integrates a dual-mode watchdog timer: 35s minimum startup period after reset, followed by 1.12s minimum normal timeout on WDI transitions. Reset logic combines VCC1/VCC2 undervoltage, RSTIN undervoltage, MR assertion, and watchdog timeout - all driving a single push-pull RST output referenced to VCC1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Range | 0.8V to 5.5V - ensures valid reset assertion even during brownout down to sub-1V primary supply. |
| VCC2 Range | 0.8V to 5.5V - supports core voltage monitoring as low as 0.9V nominal with guaranteed operation at 0.8V. |
| RSTIN Threshold | 611mV to 642mV - enables precise third-supply monitoring (e.g., 1.2V, 1.8V, 2.5V rails) using external resistor divider. |
| Reset Timeout | 140ms (min) - provides sufficient hold time for slow-starting DC-DC converters and firmware initialization. |
| Supply Current | 14μA (typ) at 3.6V - minimizes quiescent load in always-on battery-powered systems. |
| Reset Propagation Delay | 20μs (VCC to RST) - ensures fast fault response without compromising noise immunity. |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive and industrial control environments. |
Pinout & Package
SOT23-6 package (package code U6+1), 1.6mm × 2.9mm footprint, 0.95mm height, thermal resistance θJA = 115°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low push-pull reset output | Drives high to VCC1 when not asserted; sinks 1.2mA at 2.7V - no external pullup required. |
| 2 - GND | Ground reference | Common return for all internal comparators, timers, and output drivers. |
| 3 - MR | Active-low manual-reset input | Internal 50kΩ pullup to VCC1; 1µs minimum pulse width; immune to <100ns glitches. |
| 4 - VCC2 | Secondary supply input | Powers internal VCC2 comparator chain; sets RST2 reference if enabled (not present on MAX6719A). |
| 5 - VCC1 | Primary supply input | Main power source; references RST output, MR pullup, and WDI logic levels. |
| 6 - RSTIN | Adjustable reset comparator input | High-impedance (±100nA) node tied to 626.5mV internal reference - enables third-rail monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage supervision | Simultaneous monitoring of VCC1 (1.8–5.0V) and VCC2 (0.9–3.3V) with separate factory-trimmed thresholds. |
| Externally adjustable third-voltage monitor | RSTIN input with 626.5mV reference enables precise monitoring of auxiliary rails (e.g., 1.2V, 1.8V) via resistor divider. |
| Guaranteed reset validity to 0.8V | Ensures correct RST logic state even during deep brownout - critical for fail-safe shutdown in power-constrained systems. |
| Low-power operation | 14μA typical ICC at 3.6V enables multi-year battery life in always-on IoT edge nodes and portable equipment. |
| Dual-mode watchdog timer | 35s startup window allows full system boot; 1.12s normal timeout detects software hangs without false triggers. |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Sequencing multiple DC-DC outputs (e.g., 5V, 3.3V, 1.2V) in base station RF front-end modules. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset across FPGA, ADC, and RFIC after all rails stabilize. Use Value: Prevents metastability and latch-up by enforcing 140ms minimum reset hold time while tolerating VCC1/VCC2 brownouts down to 0.8V. |
Use Scenario: Monitoring isolated 24V field bus supply and 3.3V logic rail in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary supervisor detecting undervoltage on both rails and triggering controlled firmware restart before hardware fault escalation. Use Value: 14μA quiescent current extends backup battery runtime; RSTIN input monitors auxiliary 5V analog sensor supply. |
| Battery-Backed Medical Sensors | Automotive Infotainment Power Management |
|
Use Scenario: Supervising Li-ion battery voltage (VCC1) and regulated 1.8V MCU core rail (VCC2) in wearable ECG monitors. IC Role / Device Role / Timing Role: Ensuring safe MCU reset during battery discharge below 3.0V while maintaining real-time clock operation. Use Value: Guaranteed reset validity at VCC1 = 0.8V prevents undefined behavior during deep discharge; 125°C rating supports body-worn thermal profiles. |
Use Scenario: Monitoring 5V infotainment SoC supply and 1.1V GPU core rail in head-unit designs with cold-crank tolerance. IC Role / Device Role / Timing Role: Dual-threshold detection with manual reset (MR) for service mode entry and watchdog (WDI) for firmware health monitoring. Use Value: Push-pull RST eliminates need for external pullup in space-constrained automotive PCBs; -40°C to +125°C operation meets AEC-Q100 ambient requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTRVD3+T | Identical pinout and electrical specs, but features open-drain RST output instead of push-pull. | Requires external pullup resistor; better suited for wired-OR reset buses or level-shifting interfaces. | Select MAX6720AUTRVD3+T only when open-drain reset signaling or bus arbitration is required. |
| TPS3808G33DBVR | Single-supply (VDD only), 3.3V fixed threshold, 200ms timeout, 2.5μA IQ - lacks VCC2/RSTIN inputs and dual-rail capability. | Applicable only for single-rail systems; no third-voltage monitoring or secondary supply supervision. | Choose TPS3808G33DBVR only for cost-sensitive, single-rail applications where dual monitoring is unnecessary. |
Compared with MAX6719AUTRVD3+T, MAX6720AUTRVD3+T offers identical timing and thresholds but requires external pullup due to open-drain RST, while TPS3808G33DBVR reduces BOM count in single-rail designs but sacrifices dual-supply supervision and adjustable third-rail monitoring capability.
Availability
MAX6719AUTRVD3+T is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC I/O modules, battery-backed medical sensors, and automotive infotainment power management requiring stable component supply across extended temperature ranges.
Supply support for MAX6719AUTRVD3+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) designs precision analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multirail systems with tight power budgets and harsh environmental conditions.
FAQ
What is the reset timeout period for MAX6719AUTRVD3+T?
The MAX6719AUTRVD3+T has a fixed minimum reset timeout period of 140ms (D3 suffix), guaranteed over -40°C to +125°C. This delay begins when VCC1/VCC2/RSTIN rise above their respective thresholds and ensures sufficient hold time for processor initialization and power supply stabilization before releasing reset.
Does MAX6719AUTRVD3+T support monitoring a third voltage rail?
Yes, MAX6719AUTRVD3+T supports third-rail monitoring via its RSTIN pin, which connects to an internal 626.5mV reference. By adding an external resistor divider, users can configure precise reset thresholds for auxiliary supplies such as 1.2V, 1.8V, or 2.5V - enabling true triple-voltage supervision in compact SOT23-6 form factor.
What is the operating voltage range for VCC1 and VCC2 on MAX6719AUTRVD3+T?
MAX6719AUTRVD3+T operates with VCC1 from 0.8V to 5.5V and VCC2 from 0.8V to 5.5V. The device guarantees correct reset output logic state as long as either VCC1 or VCC2 remains above 0.8V - making it suitable for deep-brownout detection in battery-powered and automotive applications.
Is the reset output of MAX6719AUTRVD3+T push-pull or open-drain?
The MAX6719AUTRVD3+T features a push-pull active-low RST output referenced to VCC1. It drives high to VCC1 when deasserted and sinks up to 1.2mA at 2.7V when asserted - eliminating the need for an external pullup resistor and simplifying PCB layout in space-constrained designs.
Can MAX6719AUTRVD3+T be used with a watchdog timer?
Yes, MAX6719AUTRVD3+T includes a dual-mode watchdog timer: a 35s minimum startup period after reset to accommodate system boot, followed by a 1.12s minimum normal timeout. The WDI input detects μP activity via rising/falling edges - and if no transition occurs within the timeout, it triggers the 140ms reset pulse, enhancing firmware reliability.
MAX6719AUTRVD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.575V, 2.625V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6719AUTRVD3+T FAQ
1.How can I place an order for MAX6719AUTRVD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719AUTRVD3+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 MAX6719AUTRVD3+T reliable?
The price and inventory of MAX6719AUTRVD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719AUTRVD3+T is usually 5 days.
3.What payment methods are accepted for MAX6719AUTRVD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719AUTRVD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719AUTRVD3+T?
MAX6719AUTRVD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719AUTRVD3+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 MAX6719AUTRVD3+T?
For technical support, including MAX6719AUTRVD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719AUTRVD3+T requirements.
6.How does Aetrix verify that MAX6719AUTRVD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6719AUTRVD3+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 MAX6719AUTRVD3+T meets industry standards.
7.What is the process for return or replacement of MAX6719AUTRVD3+T?
All MAX6719AUTRVD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719AUTRVD3+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 MAX6719AUTRVD3+T part is unused and in its original packaging.
Return procedure for MAX6719AUTRVD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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