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Analog Devices Inc./Maxim Integrated MAX6719AUTSYD5+T
- Part No.:
- MAX6719AUTSYD5+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719AUTSYD5+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,996
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Product details
Overview
MAX6719AUTSYD5+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in 5-pin SOT23 package, monitoring VCC1 (primary) and RSTIN (auxiliary) with factory-trimmed 4.625V reset threshold on VCC1 and 626.5mV internal reference for RSTIN, supporting 280ms minimum reset timeout and operating from -40°C to +125°C. It ensures reliable system reset during power-up, brownout, or software fault in multivoltage embedded systems.
For engineers reviewing the MAX6719AUTSYD5+T datasheet, MAX6719AUTSYD5+T pinout, MAX6719AUTSYD5+T application, or MAX6719AUTSYD5+T equivalent, key selection criteria include its dual-supply monitoring capability (VCC1 + adjustable RSTIN), guaranteed reset validity down to VCC1 = 0.8V, open-drain active-low RST output, 14µA typical supply current at 3.6V, and AEC-Q100-qualified variants in the same family.
Technical Context
The MAX6719AUTSYD5+T implements independent voltage monitoring for primary supply (VCC1) and an externally adjustable auxiliary input (RSTIN), with separate comparators feeding a shared reset timeout timer. Its reset assertion logic combines falling-edge detection on both inputs with hysteresis (0.5% of VTH) and guarantees correct output state even when VCC1 drops to 0.8V.
This device integrates a watchdog timer with dual-mode operation-35s minimum startup period after reset and 1.12s minimum normal timeout-but the MAX6719A variant does not include WDI functionality per pin configuration and selector guide; it supports manual reset (MR) with internal 50kΩ pullup and no power-fail (PFI/PFO) or secondary supply (VCC2) monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (factory-trimmed, ±125mV tolerance), ensures precise brownout detection for 5V or 4.8V logic rails |
| RSTIN Threshold | 626.5mV (internal reference), enables monitoring of third supply down to 0.62V via external resistor divider |
| Reset Timeout Period | 280ms (min), provides sufficient hold time for processor initialization and peripheral stabilization |
| Supply Current | 14µA (typ at 3.6V), minimizes quiescent power draw in battery-operated or always-on systems |
| Operating Temperature | -40°C to +125°C, qualified for under-hood automotive and industrial control environments |
| Reset Output Type | Active-low open-drain RST, requires external pullup; compatible with bidirectional µP reset pins without contention |
| Minimum Valid VCC | 0.8V, guarantees functional reset assertion during deep brownout conditions before full power collapse |
Pinout & Package
MAX6719AUTSYD5+T is housed in a 5-pin SOT23 package (package code U5+1, outline 21-0057), with exposed pad not electrically connected. Pin 1 is RST (active-low open-drain reset output), Pin 2 is GND, Pin 3 is MR (active-low manual-reset input), Pin 4 is VCC2 (not used in MAX6719A; left unconnected), and Pin 5 is VCC1 (primary supply input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: RST | Active-low open-drain reset output | Asserts low during VCC1 undervoltage or MR activation; requires external pullup resistor for logic-high level |
| Pin 2: GND | Ground reference | Common return path for all internal comparators, timers, and output drivers; must be low-impedance |
| Pin 3: MR | Active-low manual-reset input | Pulled high internally by 50kΩ to VCC1; momentary ground connection forces system reset |
| Pin 4: VCC2 | Secondary supply input | No connection required for MAX6719A; unused and must be left floating or tied to GND per design guidelines |
| Pin 5: VCC1 | Primary supply input | Powers the IC and serves as reference for MR pullup and RST output drive; valid from 0.8V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-threshold supervision | Simultaneous monitoring of VCC1 (4.625V) and RSTIN (626.5mV reference) enables robust two-rail validation without external comparators |
| Guaranteed low-VCC operation | Reset output remains valid down to VCC1 = 0.8V, ensuring fail-safe behavior during gradual power collapse |
| Low-power design | 14µA typical ICC at 3.6V allows integration into energy-sensitive applications such as portable medical devices and IoT edge nodes |
| Manual reset with integrated pullup | 50kΩ internal MR pullup eliminates need for external resistor, simplifying BOM and PCB layout |
| Immunity to VCC transients | Withstands negative-going glitches ≤20µs at 100mV overdrive, reducing false resets in noisy power environments |
Applications
| Industrial PLC Power Sequencing | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Monitoring 5V microcontroller rail and 3.3V sensor interface rail during cold-cranking, where battery voltage dips below 6V. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset if either rail falls below threshold, holding reset for 280ms to ensure clean MCU boot. Use Value: Prevents erratic MCU behavior during engine start by guaranteeing reset until both supplies stabilize above 4.625V and 2.0V (via RSTIN divider). |
Use Scenario: Ensuring safe startup of BCM firmware after ignition-on, where multiple DC-DC converters power different subsystems. IC Role / Device Role / Timing Role: Primary VCC1 monitor (4.625V) validates main 5V rail; RSTIN monitors auxiliary 12V-to-5V converter output via resistor divider. Use Value: Enables single-chip validation of two critical rails, eliminating discrete supervisor duplication and saving board space in AEC-Q100-compliant designs. |
| Network Router Power Management | Medical Infusion Pump Controller |
Use Scenario: Coordinating reset timing across CPU, PHY, and memory rails in enterprise-grade routers with redundant power inputs. IC Role / Device Role / Timing Role: Supervises primary 3.3V CPU rail (VCC1) and backup 5V management rail (RSTIN), with MR enabling remote firmware recovery. Use Value: 280ms timeout aligns with DDR initialization requirements; open-drain RST avoids contention with bidirectional SoC reset pins. |
Use Scenario: Guaranteeing deterministic reset of safety-critical ARM Cortex-M4 controller during battery swap or AC/DC adapter transition. IC Role / Device Role / Timing Role: Monitors main 3.3V logic rail (VCC1) and isolated 5V pump motor driver rail (RSTIN), with MR supporting clinician-initiated reboot. Use Value: 14µA quiescent current extends battery life; guaranteed reset down to 0.8V prevents silent failure during low-battery brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTSYD5+T | Same 5-pin SOT23 package and 4.625V VCC1 threshold, but push-pull RST output instead of open-drain | Eliminates need for external pullup; incompatible with bidirectional µP reset I/O without series resistor | Select when driving standard CMOS inputs directly and board space permits no external components |
| TPS3808G33DBVR | Single-supply 3.3V supervisor (fixed 3.08V threshold), 3-pin SOT23, no RSTIN input or manual reset | Lacks auxiliary voltage monitoring and MR; suitable only for basic single-rail reset, not dual/three-rail systems | Choose only for cost-sensitive, single-rail applications where RSTIN and MR are unnecessary |
Compared with MAX6719AUTSYD5+T, MAX6720AUTSYD5+T offers simplified interfacing via push-pull RST but sacrifices bidirectional µP compatibility, while TPS3808G33DBVR reduces footprint and cost at the expense of monitoring flexibility and feature set.
Availability
MAX6719AUTSYD5+T is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for MAX6719AUTSYD5+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 multivoltage embedded systems where simultaneous monitoring of primary, secondary, and auxiliary rails is essential for functional safety and power integrity.
FAQ
What is the reset threshold voltage for VCC1 on the MAX6719AUTSYD5+T?
The MAX6719AUTSYD5+T has a factory-trimmed VCC1 reset threshold of 4.625V (typical), with a tolerance of ±125mV. This value is fixed and cannot be adjusted. The threshold is specified for falling VCC1 and applies across the full operating temperature range of -40°C to +125°C. The device guarantees correct reset assertion even when VCC1 drops to 0.8V, making it suitable for brownout detection in 5V-based systems.
Does the MAX6719AUTSYD5+T support monitoring a third voltage rail?
Yes, the MAX6719AUTSYD5+T supports monitoring a third voltage rail via its RSTIN pin, which features a precise 626.5mV internal reference comparator. By connecting an external resistor divider between the target rail and ground, users can set an adjustable reset threshold down to 0.62V. The RSTIN input draws only ±100nA, enabling high-impedance sensing with minimal loading on the monitored supply.
What is the function of Pin 4 (VCC2) on the MAX6719AUTSYD5+T?
Pin 4 on the MAX6719AUTSYD5+T is designated VCC2, but it is not functional in this variant. The MAX6719A is a dual-supply supervisor that monitors VCC1 and RSTIN-not VCC2. Per Maxim's pin description table, VCC2 is unused for MAX6719A/MAX6720A and must be left unconnected or tied to GND. Connecting it to any voltage may cause undefined behavior or increased current draw.
Is the MAX6719AUTSYD5+T watchdog-capable?
No, the MAX6719AUTSYD5+T does not include watchdog functionality. According to the pin configuration table and selector guide, WDI (watchdog input) is not assigned to any pin in the MAX6719A variant. Watchdog capability is present only in MAX6721A through MAX6729A and MAX6797A variants. The MAX6719AUTSYD5+T provides manual reset (MR), reset timeout, and dual-threshold supervision-but no watchdog timer or associated timing features.
What package type and RoHS status does the MAX6719AUTSYD5+T use?
The MAX6719AUTSYD5+T uses a 5-pin SOT23 package with code U5+1 (outline 21-0057) and is RoHS-compliant. The "+" suffix in the package code explicitly indicates lead-free and RoHS-conforming construction. Thermal resistance values are θJA = 324.3°C/W (four-layer board) and 255.9°C/W (multilayer board), with θJC = 82°C/W and 81°C/W respectively. The package is rated for reflow soldering up to +300°C for 10 seconds.
MAX6719AUTSYD5+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:
- 2.188V, 2.925V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6719AUTSYD5+T FAQ
1.How can I place an order for MAX6719AUTSYD5+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719AUTSYD5+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 MAX6719AUTSYD5+T reliable?
The price and inventory of MAX6719AUTSYD5+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719AUTSYD5+T is usually 5 days.
3.What payment methods are accepted for MAX6719AUTSYD5+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719AUTSYD5+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719AUTSYD5+T?
MAX6719AUTSYD5+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719AUTSYD5+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 MAX6719AUTSYD5+T?
For technical support, including MAX6719AUTSYD5+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719AUTSYD5+T requirements.
6.How does Aetrix verify that MAX6719AUTSYD5+T is sourced from the original manufacturer or authorized distributors?
All MAX6719AUTSYD5+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 MAX6719AUTSYD5+T meets industry standards.
7.What is the process for return or replacement of MAX6719AUTSYD5+T?
All MAX6719AUTSYD5+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719AUTSYD5+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 MAX6719AUTSYD5+T part is unused and in its original packaging.
Return procedure for MAX6719AUTSYD5+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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