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Analog Devices Inc./Maxim Integrated MAX6719AUTSVD3+T
- Part No.:
- MAX6719AUTSVD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719AUTSVD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,909
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Product details
Overview
MAX6719AUTSVD3+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 adjustable RSTIN input for third-voltage monitoring down to 0.626V. It asserts active-low push-pull reset during supply undervoltage, manual reset, or watchdog timeout - used in telecom power management and multivoltage embedded systems.
For engineers reviewing the MAX6719AUTSVD3+T datasheet, MAX6719AUTSVD3+T pinout, MAX6719AUTSVD3+T application, or MAX6719AUTSVD3+T equivalent, key selection criteria include guaranteed reset validity down to VCC1/VCC2 = 0.8V, 14μA typical supply current at 3.6V, immunity to short VCC transients, and support for watchdog timer with 35s startup/1.12s normal timeout - critical for battery-operated and automotive-grade reliability validation.
Technical Context
The MAX6719AUTSVD3+T implements dual independent voltage comparators with internal 0.626V reference for RSTIN, hysteresis of ±0.5% on reset thresholds, and a programmable reset timeout of 140ms (suffix D3). Its push-pull RST output is referenced to VCC1, while RST2 (if present) references VCC2 - though this variant uses only one reset output per datasheet pin mapping.
It integrates a dual-mode watchdog timer (35s min startup, 1.12s min normal timeout), manual-reset input with 50kΩ internal pullup to VCC1, and operates across –40°C to +125°C. The device guarantees correct reset logic state when either VCC1 or VCC2 remains ≥0.8V - enabling robust brownout detection in low-power industrial controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VCC1: 0.8V–5.5V; VCC2: 0.8V–5.5V - supports operation during deep brownout and enables monitoring of sub-1V core supplies. |
| Reset Timeout Period | 140ms (min) - ensures sufficient hold time for μP initialization and peripheral stabilization before release. |
| VCC1 Reset Threshold | 4.625V (typ), ±1.5% tolerance - factory-trimmed for precise 4.63V nominal trip point on primary supply. |
| VCC2 Reset Threshold | 3.075V (typ), ±1.5% tolerance - factory-trimmed for precise 3.08V nominal trip point on secondary supply. |
| RSTIN Threshold Voltage | 626.5mV (typ), ±25mV - internal reference enabling externally adjustable third-voltage monitoring via resistor divider. |
| Supply Current | 14μA (typ) at 3.6V - ultra-low quiescent current extends battery life in portable equipment. |
| Operating Temperature | –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, thermal resistance θJA = 115°C/W (multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low push-pull reset output | Asserted low during VCC1/VCC2 undervoltage, MR low, or watchdog timeout; referenced to VCC1; drives μP reset pin directly without external pullup. |
| 2 - GND | Ground reference | Common return path for all internal comparators, timers, and output drivers; must be low-impedance connection to system ground plane. |
| 3 - MR | Active-low manual-reset input | Pulled high internally to VCC1 via 50kΩ; pulling low forces immediate reset assertion for test or recovery; immune to <100ns glitches. |
| 4 - VCC2 | Secondary supply input | Powers internal circuitry when VCC2 > VCC1; input to VCC2 comparator with 3.075V threshold; supports 0.9V–3.3V range. |
| 5 - VCC1 | Primary supply input | Main power source and reference for RST output; input to VCC1 comparator with 4.625V threshold; supports 1.8V–5.0V range. |
| 6 - RSTIN | Adjustable undervoltage monitor input | High-impedance (±100nA) input referenced to 626.5mV internal bandgap; enables third-voltage monitoring (e.g., 1.2V, 1.8V rails) via external resistor divider. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage supervision | Simultaneous monitoring of VCC1 and VCC2 with separate thresholds eliminates need for two discrete supervisors - reduces BOM count and PCB area by >40%. |
| Adjustable third-voltage input (RSTIN) | 626.5mV internal reference enables precise monitoring of auxiliary rails (e.g., 1.2V, 1.5V) using high-value resistors - minimizes standby current draw. |
| Dual-mode watchdog timer | 35s startup timeout allows full system boot before watchdog enforcement; 1.12s normal timeout detects software hangs within milliseconds - improves firmware reliability. |
| Guaranteed reset validity down to 0.8V | Ensures deterministic reset behavior even during severe brownout conditions - critical for fail-safe operation in automotive and industrial applications. |
| Low supply current (14μA typ) | Enables continuous supervision in always-on battery-powered nodes (e.g., IoT sensors, remote monitors) without compromising runtime. |
Applications
| Telecom Power Management | Industrial PLC Controller |
|---|---|
Use Scenario: Monitoring primary 3.3V and secondary 1.2V rails in a 5G base station power module during hot-swap events and load transients. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset if either rail drops below threshold; 140ms timeout prevents spurious resets during brief dips. Use Value: Prevents corrupted firmware execution during partial power loss - maintains data integrity and avoids field-replaceable unit (FRU) failure. |
Use Scenario: Supervising 24V DC input and isolated 5V logic supply in an industrial programmable logic controller exposed to EMI and voltage sags. IC Role / Device Role / Timing Role: Primary supervisor detecting brownout on both supplies; RSTIN used to monitor backup supercap voltage (2.5V) for graceful shutdown. Use Value: Enables deterministic safe-state transition before power collapse - meets IEC 61000-4-11 immunity requirements for industrial automation. |
| Automotive Infotainment Head Unit | Portable Medical Monitor |
Use Scenario: Validating 5V main and 1.8V SoC core supplies in an AEC-Q100-compliant infotainment system operating from vehicle battery (9V–16V). IC Role / Device Role / Timing Role: Resets application processor on undervoltage; manual reset (MR) supports service mode entry; watchdog guards against UI freeze. Use Value: Meets ASIL-B functional safety prerequisites for non-critical subsystems without requiring additional safety MCU resources. |
Use Scenario: Ensuring reliable boot and runtime supervision of 3.7V Li-ion battery and regulated 3.3V/1.2V rails in a handheld ECG monitor. IC Role / Device Role / Timing Role: Monitors battery voltage decay via RSTIN; triggers controlled shutdown before cutoff; 14μA current extends clinical-use battery life. Use Value: Guarantees uninterrupted patient data capture during low-battery transitions - satisfies FDA Class II device power integrity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTSVD3+T | Same SOT23-6 package and 140ms timeout, but VCC1 threshold = 3.075V (vs. 4.625V) and VCC2 = 2.925V - optimized for lower-voltage systems. | Preferred for dual 3.3V/1.8V systems where MAX6719AUTSVD3+T's 4.63V threshold would cause premature reset on nominal 5V rails. | Select MAX6720AUTSVD3+T when primary supply is ≤3.3V; verify compatibility with existing reset timing and voltage margin requirements. |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only), 200ms timeout, 1.6μA quiescent current - lacks dual-monitoring and RSTIN capability. | Only suitable for single-rail applications; requires external circuitry to supervise second supply or implement watchdog. | Choose TPS3808G33DBVR only if system has only one critical rail and ultra-low current (<2μA) is mandatory - not a functional replacement. |
Compared with MAX6720AUTSVD3+T and TPS3808G33DBVR, the MAX6719AUTSVD3+T uniquely delivers dual-rail supervision with 4.63V/3.08V thresholds and integrated RSTIN monitoring in a 6-pin SOT23 - eliminating discrete components and simplifying layout for multivoltage designs requiring precise 5V-system reset behavior.
Availability
MAX6719AUTSVD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for MAX6719AUTSVD3+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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits targeting multivoltage embedded systems where space, power, and reliability constraints prohibit discrete solutions - with emphasis on brownout resilience and watchdog-assisted firmware integrity.
FAQ
What is the exact reset timeout period for MAX6719AUTSVD3+T?
The MAX6719AUTSVD3+T features a factory-set minimum reset timeout period of 140ms (suffix D3), guaranteed over –40°C to +125°C. This duration ensures sufficient hold time for microprocessor initialization and peripheral configuration before reset release, and is independent of supply voltage within the specified operating range.
Does MAX6719AUTSVD3+T support watchdog functionality?
Yes, the MAX6719AUTSVD3+T includes a dual-mode watchdog timer with a 35s minimum startup timeout (for system boot) and 1.12s minimum normal timeout (for runtime monitoring). The WDI pin must be toggled within each timeout window to prevent reset assertion - and can be left unconnected to disable the function entirely.
What are the factory-trimmed reset threshold voltages for MAX6719AUTSVD3+T?
The MAX6719AUTSVD3+T has factory-trimmed thresholds of 4.625V (typ, ±1.5%) on VCC1 and 3.075V (typ, ±1.5%) on VCC2. These values correspond to suffix "TS" (VCC1 = 4.63V) and "V" (VCC2 = 3.08V) per Maxim's Reset Voltage Threshold Suffix Guide - verified in the Electrical Characteristics table of the official datasheet.
Can MAX6719AUTSVD3+T monitor a third voltage rail?
Yes, the MAX6719AUTSVD3+T provides an RSTIN pin with a precise 626.5mV (typ) internal reference, enabling third-rail monitoring (e.g., 1.2V, 1.8V, 2.5V) via an external resistor divider. The RSTIN input draws only ±100nA, allowing high-resistance dividers that minimize standby current - a confirmed feature per the Adjustable Input Voltage section.
Is MAX6719AUTSVD3+T compatible with 0.8V supply operation?
Yes, the MAX6719AUTSVD3+T guarantees valid reset output logic states when either VCC1 or VCC2 remains ≥0.8V - explicitly stated in the General Description and Absolute Maximum Ratings. This enables reliable brownout detection in ultra-low-voltage systems where supplies dip near cutoff thresholds.
MAX6719AUTSVD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.575V, 2.925V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6719AUTSVD3+T FAQ
1.How can I place an order for MAX6719AUTSVD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719AUTSVD3+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 MAX6719AUTSVD3+T reliable?
The price and inventory of MAX6719AUTSVD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719AUTSVD3+T is usually 5 days.
3.What payment methods are accepted for MAX6719AUTSVD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719AUTSVD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719AUTSVD3+T?
MAX6719AUTSVD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719AUTSVD3+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 MAX6719AUTSVD3+T?
For technical support, including MAX6719AUTSVD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719AUTSVD3+T requirements.
6.How does Aetrix verify that MAX6719AUTSVD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6719AUTSVD3+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 MAX6719AUTSVD3+T meets industry standards.
7.What is the process for return or replacement of MAX6719AUTSVD3+T?
All MAX6719AUTSVD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719AUTSVD3+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 MAX6719AUTSVD3+T part is unused and in its original packaging.
Return procedure for MAX6719AUTSVD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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