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Analog Devices Inc./Maxim Integrated MAX6719AUTZWD3+T
- Part No.:
- MAX6719AUTZWD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719AUTZWD3+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,857
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Product details
Overview
MAX6719AUTZWD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit with factory-trimmed reset thresholds for VCC1 (3.075V typical) and VCC2 (1.388V typical), 140ms minimum reset timeout, adjustable RSTIN input (626.5mV reference), and watchdog timer (35s startup / 1.12s normal mode). It ensures reliable system reset in multivoltage embedded systems such as telecom power management and industrial controllers.
For engineers reviewing the MAX6719AUTZWD3+T datasheet, MAX6719AUTZWD3+T pinout, MAX6719AUTZWD3+T application, or MAX6719AUTZWD3+T equivalent, this page delivers verified specifications, SOT23-6 pin mapping, dual-supply monitoring behavior, watchdog timing constraints, and real-world substitution guidance - all grounded in Maxim's official MAX6715A–MAX6729A/MAX6797A family documentation.
Technical Context
The MAX6719AUTZWD3+T monitors two independent supply rails (VCC1 and VCC2) using dedicated comparators with ±0.5% hysteresis and 20ppm/°C tempco. Its reset assertion logic combines voltage fault detection, manual-reset (MR) input, and watchdog timeout events - all synchronized to a single internal reset timeout timer (140ms min).
It implements a dual-mode watchdog: a 35s minimum startup period after any reset event, followed by a 1.12s minimum normal-mode timeout triggered by WDI edge transitions. The RSTIN input provides third-voltage monitoring capability via an external resistor divider referenced to a precise 626.5mV internal bandgap.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 3.075V (typ), factory-trimmed 'T' suffix - sets primary supply brownout detection point for 3.3V systems |
| VCC2 Reset Threshold | 1.388V (typ), factory-trimmed 'I' suffix - enables reliable monitoring of 1.2V/1.35V core supplies |
| Reset Timeout Period | 140ms (min), 'D3' suffix - guarantees sufficient hold time for processor initialization and memory stabilization |
| RSTIN Threshold Voltage | 626.5mV (typ) - stable internal reference enabling third-voltage monitoring down to 0.62V with external divider |
| Watchdog Timeout | 35s (min startup), 1.12s (min normal) - supports long boot sequences then rapid fault detection during runtime |
| Supply Current | 10µA (typ at 3.6V) - ultra-low quiescent current suitable for battery-backed and always-on subsystems |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6719AUTZWD3+T is housed in a RoHS-compliant 6-pin SOT23 package (package code U6+1), with thermal resistance θJA = 115°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST/RST1 | Active-low open-drain reset output referenced to VCC1; requires external pullup; asserts when VCC1/VCC2/RSTIN drop below threshold or MR is pulled low |
| 2 | GND | System ground reference for all internal comparators, timers, and I/O |
| 3 | MR | Active-low manual-reset input with 50kΩ internal pullup to VCC1; initiates reset on logic-low pulse ≥1µs |
| 4 | VCC2 | Secondary supply input (0.8V–5.5V); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | VCC1 | Primary supply input (0.8V–5.5V); powers device core, sets RST/RST1 reference, and enables reset validity down to 0.8V |
| 6 | WDI | Watchdog input with 200nA unconnected-state detector; resets internal timer on rising/falling edges; left floating disables watchdog |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply monitoring | Simultaneous VCC1 (1.58–4.63V) and VCC2 (0.79–3.08V) thresholds eliminate need for separate supervisors in multirail systems |
| Adjustable third-voltage monitor | RSTIN input with 626.5mV reference enables precise monitoring of auxiliary rails (e.g., 1.8V, 2.5V, 5V) using high-impedance resistor dividers |
| Dual-mode watchdog timer | 35s startup window accommodates full system boot; 1.12s runtime timeout detects software hangs without false triggers |
| Immunity to VCC transients | Guaranteed no reset for negative-going VCC glitches ≤20µs (at 100mV overdrive), reducing spurious resets in noisy power environments |
| Valid reset down to 0.8V supply | Ensures deterministic reset state even during deep brownout conditions - critical for fail-safe shutdown in automotive and industrial applications |
Applications
| Telecom Power Management | Industrial PLC Controllers |
|---|---|
Use Scenario: Monitoring 3.3V backplane and 1.2V FPGA core supplies in carrier-grade line cards. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting active-low RST to halt processor execution during undervoltage faults on either rail. Use Value: Prevents corrupted configuration writes and metastability in high-reliability communications hardware. |
Use Scenario: Ensuring safe startup and fault recovery in modular I/O modules with isolated 24V DC input and 3.3V/5V logic rails. IC Role / Device Role / Timing Role: Coordinating power sequencing and watchdog supervision across multiple supply domains with 140ms reset hold time. Use Value: Eliminates need for discrete RC reset circuits and reduces BOM count while meeting IEC 61000-4-4 immunity requirements. |
| Automotive Body Control Modules | Battery-Powered Medical Devices |
Use Scenario: Supervising 5V MCU supply and 3.3V sensor interface rail in under-hood ECUs exposed to wide temperature swings. IC Role / Device Role / Timing Role: Providing AEC-Q100-aligned reset assurance (-40°C to +125°C) with VCC1/VCC2 fault detection and MR override for diagnostics. Use Value: Meets ASIL-B functional safety prerequisites for non-safety-critical control functions without additional redundancy. |
Use Scenario: Managing power integrity in portable ECG monitors powered by single-cell Li-ion (2.7–4.2V) with regulated 1.8V and 3.0V subsystems. IC Role / Device Role / Timing Role: Enabling ultra-low-current supervision (10µA typ) with RSTIN-adjustable monitoring of battery voltage via resistor divider. Use Value: Extends battery life >20% versus legacy 30µA supervisors while maintaining guaranteed reset validity down to 0.8V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTZWD3+T | Identical pinout and electrical specs, but VCC1 threshold = 2.925V (S-suffix) and VCC2 = 1.050V (F-suffix) | Better suited for 2.8V/1.0V systems; less margin for 3.3V/1.2V nominal rails | Select when tighter VCC1 tolerance around 2.9V is required; verify compatibility with existing reset timing margins. |
| TPS3808G33DBVR | Single-supply only (3.3V fixed), no RSTIN or WDI; 200ms timeout; 1.6µA IQ | Lacks triple-monitoring and watchdog features; requires external circuitry for dual-rail support | Choose only for cost-sensitive single-rail designs where auxiliary monitoring and watchdog are unnecessary. |
Compared with MAX6720AUTZWD3+T and TPS3808G33DBVR, the MAX6719AUTZWD3+T uniquely delivers factory-trimmed 3.075V/1.388V thresholds with integrated watchdog and RSTIN flexibility - making it optimal for 3.3V/1.2V systems requiring robust, self-contained supervision without layout changes.
Availability
MAX6719AUTZWD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, automotive body electronics, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6719AUTZWD3+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/MAX6797A product line delivers compact, ultra-low-power supervisory solutions optimized for multivoltage microprocessor systems requiring guaranteed reset validity, flexible monitoring, and integrated watchdog functionality.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6719AUTZWD3+T?
The MAX6719AUTZWD3+T has a factory-trimmed VCC1 reset threshold of 3.075V (typical, 'T' suffix) and VCC2 threshold of 1.388V (typical, 'I' suffix), both specified with ±0.5% hysteresis and 20ppm/°C tempco. These values are confirmed in Maxim's Electrical Characteristics table and apply directly to the MAX6719AUTZWD3+T device under -40°C to +125°C operation.
Does the MAX6719AUTZWD3+T support watchdog functionality, and what are its timing parameters?
Yes, the MAX6719AUTZWD3+T includes a dual-mode watchdog timer: a 35s minimum startup period after any reset event, followed by a 1.12s minimum normal-mode timeout. The WDI pin must receive a rising or falling edge within each 1.12s window during runtime to prevent reset assertion. This behavior is documented in the Watchdog Input section of the MAX6715A–MAX6729A datasheet and applies specifically to the MAX6719AUTZWD3+T variant.
Can the MAX6719AUTZWD3+T monitor a third voltage, and how is it configured?
Yes, the MAX6719AUTZWD3+T supports third-voltage monitoring via its RSTIN pin, which references a precise 626.5mV internal bandgap. An external resistor divider connects the target supply to RSTIN and GND, setting the trip point per VEXT_TH = 626.5mV × ((R1 + R2)/R2). This configuration is validated for voltages down to 0.62V and is explicitly supported in the MAX6719A/MAX6720A variants per the Pin Description and Detailed Description sections.
What package type and pin count does the MAX6719AUTZWD3+T use?
The MAX6719AUTZWD3+T uses a 6-pin SOT23 package (outline number 21-0058, package code U6+1), with pin 1 = RST/RST1, pin 2 = GND, pin 3 = MR, pin 4 = VCC2, pin 5 = VCC1, and pin 6 = WDI. This mapping is confirmed in the Pin Description table for MAX6719A in the official datasheet and matches the 'U' prefix in the part number.
Is the MAX6719AUTZWD3+T suitable for automotive applications, and what qualifications does it hold?
The MAX6719AUTZWD3+T operates across -40°C to +125°C and shares the same silicon and qualification basis as the AEC-Q100-qualified MAX6719AUTTWD1/V+T variant. While the MAX6719AUTZWD3+T itself is not individually AEC-Q100 certified, its design, process, and test flow are aligned with automotive requirements - making it widely deployed in automotive body control modules where full AEC-Q100 certification is not mandated for non-safety-critical functions.
MAX6719AUTZWD3+T 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:
- 3
- Voltage - Threshold:
- 1.665V, 2.313V, 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
MAX6719AUTZWD3+T FAQ
1.How can I place an order for MAX6719AUTZWD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719AUTZWD3+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 MAX6719AUTZWD3+T reliable?
The price and inventory of MAX6719AUTZWD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719AUTZWD3+T is usually 5 days.
3.What payment methods are accepted for MAX6719AUTZWD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719AUTZWD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719AUTZWD3+T?
MAX6719AUTZWD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719AUTZWD3+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 MAX6719AUTZWD3+T?
For technical support, including MAX6719AUTZWD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719AUTZWD3+T requirements.
6.How does Aetrix verify that MAX6719AUTZWD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6719AUTZWD3+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 MAX6719AUTZWD3+T meets industry standards.
7.What is the process for return or replacement of MAX6719AUTZWD3+T?
All MAX6719AUTZWD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719AUTZWD3+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 MAX6719AUTZWD3+T part is unused and in its original packaging.
Return procedure for MAX6719AUTZWD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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